In this article, we will look at fault codes, causes and remedies
The table of codes was discussed in the article "Gasoline Engine Diagnostic Trouble Codes"
To diagnose the vehicle's ECU, it is necessary to turn on the "ignition" in the diagnostic mode (forced supply of "+" after the ignition switch).
For this:
- – Insert the car card into the reader (keyless car modification, scenario 1 (basic without hands-free function) and scenario 2 (maximum with hands-free function)).
- – press and hold (more than 5 seconds) the engine start button without conditions for starting the engine,
- - connect the diagnostic tool and perform the necessary operations.
The control unit for the right and left xenon headlights is supplied with power when the dipped beam headlights are turned on.
Thus, their diagnosis can be made only after the ignition is turned on in the mode
diagnostics (forced supply of "+" after the ignition switch) and switching on the low beam headlights.
To disable the "+" after the ignition, do the following:
- – disable the diagnostic tool,
- – briefly press the engine start button twice (for less than 3 seconds),
- - Verify that the forced "+" supply after the ignition switch is terminated by turning off the computer warning lights on the instrument panel.
DF001 Coolant temperature sensor circuit
Check the cleanliness and condition of the coolant temperature sensor and its connector.
Disconnect the battery and the injection computer.
Check the cleanliness of the contacts and the condition of the connector.
Connect the universal contact board, check for open and short circuits in the following circuits:
- ECU channel F2, connector B → Coolant temperature sensor
- ECU channel F4, connector B → Coolant temperature sensor (refer to the corresponding wiring diagram for connector pin numbers).
Check the resistance of the coolant temperature sensor
If the values do not match, replace the coolant temperature sensor.
If the fault persists, process other faults and then move on to compliance.
After troubleshooting, clear the fault information from memory.
DF002 Air temperature sensor circuit
Check the cleanliness and condition of the air temperature sensor and its connector.
Disconnect the battery and the injection computer.
Check the cleanliness of the contacts and the condition of the connector.
Connect the universal contact board, check for open and short circuits in the following circuits:
- ECU channel E3, connector B → Air temperature sensor
- ECU channel E2, connector B → Air temperature sensor (see the connector pin numbers on the corresponding wiring diagram).
Check the resistance of the air temperature sensor
If the values do not match, replace the air temperature sensor.
Follow "Diagnostic conditions for stored fault":
- – If the fault is present, continue handling the fault.
- - If the fault is stored, don't take it into account anymore.
Treat other possible problems. Clear fault information from memory.
DF005 Engine Speed Sensor Circuit
Possible causes of failure:
- - malfunction of the holes of the sensor part on the flywheel ring gear;
- - no signal or erroneous signal of the engine crankshaft speed.
The fault is declared present after the starter has been operated for 10 seconds or the engine speed is greater than 600 rpm.
Check the flywheel ring gear for cleanliness and condition.
If the engine flywheel has been replaced or removed, the target programming on the flywheel must be reinitialized, then the data entered.
Reinitialize Programming:
Issue command RZ005
Programming the engine speed and crankshaft position sensor:
Engage third gear and increase engine speed to 4000 rpm, then reduce engine speed until fuel is restored*.
Repeat the operation twice in a row.
In rare cases, a DF125 malfunction may occur. This is the moment when, when reducing the speed with the pedal released The speed of the crankshaft is reduced to idle speed and the engine starts to work again under load
Check the mounting and position of the speed and crank position sensorshaft
Check the cleanliness and condition of the crankshaft speed and position sensor and its connections.
Check the condition of the wire.
Disconnect the battery and the injection computer.
Check the cleanliness of the contacts and the connection of the connector.
Connect the universal contact board, check for open and short circuits in the following circuits:
- ECU channel E4, connector B → Engine speed sensor
- ECU channel F3, connector B → Engine speed sensor (Refer to the corresponding wiring diagram for connector pin numbers).
Follow "Diagnostic conditions for stored fault":
- – If the fault is present, continue handling the fault.
- - If the fault is stored, don't take it into account anymore.
Treat other possible problems. Clear fault information from memory.
DF008 Accelerator Pedal Position Sensor G-1 Circuit
Possible causes of failure:
- - open circuit or short to ground;
- - short circuit to + 12V
- - signal mismatch from conductive tracks 1 and 2 of the accelerator pedal position sensor
Requirements for diagnostics for a stored fault:
The fault is declared present after the accelerator pedal is moved from the "idle" position to the stop.
Make sure the accelerator pedal moves freely.
Check the cleanliness and condition of the pedal position sensor and its connector.
Disconnect the battery and the injection computer.
Check the cleanliness of the contacts and the condition of the connector.
Connect the universal contact board, check for open and short circuits in the following circuits:
- ECU channel H3, connector A → Accelerator pedal position sensor, track 1
- ECU terminal G2, ECU terminal A → Accelerator pedal position sensor, track 1
- ECU track H2, connector A → Accelerator pedal position sensor, conductive track 1 (refer to the connector pin numbers on the corresponding wiring diagram).
If fault DF011 is present or stored, deal with the fault.
If the problem persists, handle other problems and then proceed to compliance.
DF009 Gender 2 Pedal Position Sensor Circuit
Possible causes of failure:
- - open circuit or short to ground;
- - short circuit to + 12V
Requirements for diagnostics for a stored fault:
The fault is declared present after the accelerator pedal is moved from the "idle" position to the stop.
Make sure the accelerator pedal moves freely.
Check the cleanliness and condition of the accelerator pedal position sensor and its connector.
Disconnect the battery and the injection computer.
Check the cleanliness of the contacts and the condition of the connector.
Connect the universal contact board, check for open and short circuits in the following circuits:
- ECU channel F4, connector A → Accelerator pedal position sensor, track 2
- ECU channel F2, connector A → Accelerator pedal position sensor, track 2
- ECU channel F3, connector A → Accelerator pedal position sensor, conductive track 2 (refer to the corresponding wiring diagram for the connector pin numbers).
If fault DF012 is present or stored, deal with the fault.
If the problem persists, handle other problems and then proceed to compliance.
DF011 No. 1 sensor supply voltage
Possible causes of failure:
- - voltage out of tolerance;
- - internal electronics failure.
If faults accumulate, deal with other faults first
Check the cleanliness and condition of the throttle body connector.
Check the cleanliness and condition of the accelerator pedal position sensor connector.
Disconnect the battery and the injection computer.
Check the cleanliness of the contacts and the condition of the connector.
Connect the universal contact board, check for open and short circuits in the following circuits:
- ECU Pin G2 Connector B → Throttle Body
- ECU, channel G2, connector A → Accelerator pedal position sensor, conductive track 1 (refer to the corresponding wiring diagram for the connector pin numbers).
If the fault persists, then this indicates a malfunction of the computer.
Perform "Test conditionsrunning diagnostics for a stored fault":
- – If the fault is present, continue handling the fault.
- - If the fault is stored, don't take it into account anymore.
Treat other possible problems. Clear fault information from memory.
DF012 No. 2 sensors supply voltage
Possible causes of failure:
- - voltage out of tolerance;
- - internal electronics failure.
If faults accumulate, deal with other faults first
Check the cleanliness and condition of the accelerator pedal position sensor connector.
Disconnect the battery and the injection computer.
Check the cleanliness of the contacts and the condition of the connector.
Connect the universal contact board, check for open and short circuits in the following circuit:
ECU, connector A track F2 Accelerator pedal position sensor, conductive track 2 (See corresponding wiring diagram for connector track number).
If the fault persists, then this indicates a malfunction of the computer.
Follow "Diagnostic conditions for stored fault":
- – If the fault is present, continue handling the fault.
- - If the fault is stored, don't take it into account anymore.
Treat other possible problems. Clear fault information from memory.
DF026 No. 1 injector control circuit
Possible causes of failure:
- - open circuit;
- - short circuit to ground;
- - short circuit to + 12V
If faults DF084 or DF046 are present or stored, deal with them first.
Requirements for diagnostics for a stored fault:
The fault is declared present after a delay of 10 seconds with the engine running.
WARNING! After repair, the fault may still be reported as present.
Check the cleanliness and condition of cylinder #1 injector and its connector.
With the card installed in the reader in the 2nd fixed position, check for + 12 V on the injector connector of cylinder No. 1 (see the pin number of the connector on the corresponding wiring diagram).
If there is no +12V voltage:
- - disconnect the battery,
- - disconnect the connector marked PPM1 in the protection and switching unit,
- – check the cleanliness of the contacts and the condition of the connector,
- - connect the universal contact board. Make sure there is no open in the following circuit:
Protection and switching unit, connector PPM1 pin 1 Cylinder 1 injector
Connect the connector of the protection and switching unit and connect the battery.
If, with the card in the 2nd fixed position in the reader, + 12 V is still not supplied to the injector connector of cylinder No. 1, this indicates a malfunction in the protection and switching unit.
Disconnect the battery and the injection computer.
Check the cleanliness of the contacts and the condition of the connector.
Connect the universal contact board and check for open and short circuits in the following circuit:
Injection ECU, track A1 of connector B Cylinder No. 1 injector (See the corresponding wiring diagram for connector pin number).
Check the resistance of the No. 1 injector.
If the resistance is not correct, replace the No. 1 cylinder injector.
If the problem persists, replace the cylinder #1 injector.
If the problem persists, handle other problems and then proceed to compliance.
Follow "Diagnostic conditions for stored fault":
- – If the fault is present, continue handling the fault.
- - If the fault is stored, don't take it into account anymore.
Treat other possible problems. Clear fault information from memory.
DF027 No. 2 injector control circuit
Possible causes of failure:
- - open circuit;
- - short circuit to ground;
- - short circuit to + 12V
If faults DF084 or DF046 are present or stored, deal with them first.
Requirements for diagnostics for a stored fault:
The fault is declared present after a delay of 10 seconds with the engine running.
Check the cleanliness and condition of cylinder #2 injector and its connector.
With the card in the 2nd fixed position in the reader, check for + 12 V at the cylinder 2 injector connector (see the connector pin number on the corresponding electrical about the scheme).
If there is no +12V voltage:
- - disconnect the battery,
- - disconnect the connector marked PPM1 in the protection and switching unit,
- – check the cleanliness of the contacts and the condition of the connector,
- - connect the universal contact board. Make sure there is no open in the following circuit:
Protection and switching unit, connector PPM1 pin 1 Cylinder No. 2 injector
Connect the connector of the protection and switching unit and connect the battery.
If, with the card inserted in the reader in the 2nd fixed position, + 12 V voltage is still not supplied to the injector connector of cylinder No. 1, this indicates a malfunction in the protection and switching unit.
Disconnect the battery and the injection computer.
Check the cleanliness of the contacts and the condition of the connector.
Connect the universal contact board and check for open and short circuits in the following circuit:
Injection ECU, track A2 of connector B Cylinder No. 2 injector (See the connector pin number on the corresponding wiring diagram).
Check the resistance of the injector of cylinder No. 2
If the resistance is not correct, replace the No. 2 injector.
If the problem persists, replace the No. 2 injector.
If the problem persists, handle other problems and then proceed to compliance.
DF028 No. 3 injector control circuit
Possible causes of failure:
- - open circuit;
- - short circuit to ground;
- - short circuit to + 12V
Check the cleanliness and condition of the #3 cylinder injector and its connector.
With the card installed in the reader in the 2nd fixed position, check for + 12 V on the injector connector of cylinder No. 3 (see the pin number of the connector on the corresponding wiring diagram).
If there is no +12V voltage:
- - Disconnect the battery.
- - disconnect the connector marked PPM1 in the protection and switching unit,
- – check the cleanliness of the contacts and the condition of the connector,
- - connect the universal contact board. Make sure there is no open in the following circuit:
Protection and switching unit, connector PPM1 pin 1 Nozzle cylinder #3
Connect the connector of the protection and switching unit and connect the battery.
If, with the card inserted in the reader in the 2nd fixed position, + 12 V voltage is still not supplied to the injector connector of cylinder No. 3, this indicates a malfunction in the protection and switching unit.
Disconnect the battery and the injection computer.
Check the cleanliness of the contacts and the condition of the connector.
Connect the universal contact board and check for open and short circuits in the following circuit:
Injection ECU, track A3 of connector B No. 3 injector (See the corresponding wiring diagram for connector pin number).
Check the resistance of the injector of cylinder no. 3
If the resistance is not correct, replace the No. 3 injector.
If the problem persists, replace the cylinder #3 injector.
If the problem persists, handle other problems and then proceed to compliance.
DF029 No. 4 injector control circuit
Possible causes of failure:
- - open circuit;
- - short circuit to ground;
- - short circuit to + 12V
If faults DF084 or DF046 are present or stored, deal with them first.
Requirements for diagnostics for a stored fault:
The fault is declared present after a delay of 10 seconds with the engine running.
Check the cleanliness and condition of the #4 cylinder injector and its connector.
With the card installed in the reader in the 2nd fixed position, check for + 12 V on the injector connector of cylinder No. 4 (see the pin number of the connector on the corresponding wiring diagram).
If there is no +12V voltage:
- - disconnect the battery,
- - disconnect the connector marked PPM1 in the protection and switching unit,
- – check the cleanliness of the contacts and the condition of the connector,
- - connect the universal contact board. Make sure there is no open in the following circuit:
Protection and switching unit, connector PPM1 pin 1 Cylinder No. 4 injector
Connect the connector of the protection and switching unit and connect the battery.
If, with the card inserted in the reader in the 2nd fixed position, + 12 V voltage is still not supplied to the injector connector of cylinder No. 4, this indicates a malfunction in the protection and switching unit.
Disconnect the battery and the injection computer.
Check for cleanliness contacts and connector status.
Connect the universal contact board and check for open and short circuits in the following circuit:
Injection ECU, track A4 of connector B No. 4 injector (See the corresponding wiring diagram for connector pin number).
Check the resistance of the injector of cylinder no. 4
If the resistance is not correct, replace the No. 4 injector.
If the problem persists, replace the No. 4 injector.
If the problem persists, handle other problems and then proceed to compliance.
DF037 Electronic immobilizer system
Possible cause of the malfunction: - malfunction of the circuit with the multiplex network
To fix the problem, you need to test the multiplex network.
If the problem persists, troubleshoot the Immobilizer system.
DF038 ECU
Violation of the operation of the electronic circuits of the unit itself.
The ECU needs to be repaired or replaced.
DF046 Battery voltage
The cause of the malfunction: - low battery voltage.
If fault DF084 is present or stored, deal with that fault first.
Requirements for diagnostics for a stored fault:
The fault is declared present when the engine speed is over 2000 rpm.
Disconnect the battery and the injection computer.
Check the cleanliness and condition of the ECU connections.
Disconnect the connector labeled PPM1 in the Protection and Switching Unit.
Check the cleanliness of the contacts and the connection of the connector.
Connect the universal terminal board, check the continuity of the following circuit: ECU, track M2 connector B - Protection and Switching Unit, connector PPM1 track 1
Perform the diagnosis of the protection and switching unit (the protection and switching unit powers the injection system).
- – Strip the battery terminals and all connections to positive and ground.
- - Check battery voltage.
- - Check the battery charging circuit.
Follow the instruction to confirm the repair:
- – If the fault is present, continue handling the fault.
- - If the fault is stored, don't take it into account anymore.
Treat other possible problems. Clear fault information from memory.
DF049 Refrigerant pressure sensor circuit
Reason: - voltage out of tolerance
Check the cleanliness and condition of the absolute pressure sensor and its connector.
Disconnect the battery and the injection computer.
Check the cleanliness of the contacts and the condition of the connector.
Connect the universal contact board instead of the ECU and check for open circuits and short circuits in the circuits:
- ECU, connector B track J2 → Refrigerant pressure sensor
- ECU, connector B track J3 → Refrigerant pressure sensor
- ECU, connector B track K2 → Refrigerant pressure sensor
(See the connector pin numbers on the relevant wiring diagram).
If fault DF012 is present or stored, deal with the fault.
If the problem persists, handle other problems and then proceed to compliance.
DF059 No. 1 cylinder misfiring
Possible reasons:
- - Misfires of the mixture, leading to the destruction of the catalytic converter;
- - Passes leading to increased toxicity of exhaust gases
If the following faults are present or stored, deal with them first:
- - Ignition system: DF072, DF073, DF074 and DF075.
- - Fuel supply system: DF026, DF027, DF028, DF029 and DF085.
- - Engine speed sensor signal: DF005 and DF125.
- - Camshaft dephaser sensor and solenoid: DF080 and DF097.
Before proceeding with the diagnostics below, check that there are no misfires in the remaining cylinders.
Requirements for diagnostics for a stored fault:
A fault is declared present under the following conditions:
- - Check for electrical problems.
- – Programming must be done
- - The engine must be warm (at least 75°)
- – With the engine idling, turn on all electrical consumers for 15 minutes.
If the mixture misfires only in cylinder #1
Probably, the malfunction is related to an element that can only affect this cylinder:
- - check the injector of cylinder #1,
- – check the condition and compliance of the spark plugs,
- - Check the finger type ignition coil of cylinder #1.
If there are no deviations from the norm, check the same elements for cylinder # 4 (to eliminate the possibility of an error in determining the cylinder).
If the mixture misfires in cylinders #1 and #4
The malfunction is probably related to some element that can affect the operation of a pair of cylinders:
- - check the circuits of the respective ignition coils (diagnose DF072or DF075),
- – check the condition and suitability of the spark plugs.
If all cylinders misfire (see DF060, DF061 and DF062)
The fault is probably related to some element that can affect the operation of all cylinders:
- – check fuel quality,
- – check the condition and suitability of the spark plugs.
Make sure all problems are corrected. Delete stored faults from memory. Do not erase programming data. To confirm the repair results:
Troubleshoot electrical circuits.
Register programmable parameters.
Warm up the engine (at least 75 °C).
When the engine is idling, turn on all electrical consumers for 15 minutes.
If the problem reappears, continue with the diagnosis.
Diagnose the catalytic converter by performing the appropriate after-sales service.
If the problem persists, check the following:
- - check engine speed and crankshaft position sensor,
- – check the condition and cleanliness of the flywheel ring gear,
- - check the fastening of the engine speed and crankshaft position sensor,
- - check the gap between the sensor and the flywheel ring gear,
- - check the compression in the engine cylinders,
- – check the entire fuel supply system,
- – check the entire ignition system,
- - check the hydraulic tappets for camshaft knocking.
If the problem persists, handle other problems and then proceed to compliance.
DF060 Cylinder 2 Misfire
Possible causes and effects:
- - mixture misfiring, leading to the destruction of the catalytic converter;
- - omissions leading to increased toxicity of exhaust gases
If the following faults are present or stored, deal with them first:
- - Ignition system: DF072, DF073, DF074 and DF075.
- - Fuel supply system: DF026, DF027, DF028, DF029 and DF085.
- - Engine speed sensor signal: DF005 and DF125.
- - Camshaft dephaser sensor and solenoid: DF080 and DF097.
Before proceeding with the diagnostics below, check that there are no misfires in the remaining cylinders.
Requirements for diagnostics for a stored fault:
A fault is declared present under the following conditions:
- - Check for electrical problems.
- – Programming must be done
- - The engine must be warm (at least 75°)
- – With the engine idling, turn on all electrical consumers for 15 minutes.
Probably, the malfunction is related to an element that can only affect this cylinder:
- - check the injector of cylinder #2,
- – check the condition and compliance of the spark plugs,
- - Check the finger type ignition coil of cylinder #2.
If there are no abnormalities, check the same items for cylinder #3
DF061 Cylinder #3 Misfire
Probably, the malfunction is related to the element that can affect
this cylinder only:
- - check the injector of cylinder #3,
- – check the condition and compliance of the spark plugs,
- - Check the finger type ignition coil of cylinder #3.
If there are no deviations from the norm, check the same elements for cylinder # 2 (to eliminate the possibility of an error in determining the cylinder).
If the mixture misfires in cylinders #2 and #3
The malfunction is probably related to some element that can affect the operation of a pair of cylinders:
- - Check the relevant ignition coil circuits (diagnose DF073or DF074),
- – check the condition and suitability of the spark plugs.
If there are gaps in all cylinders
The fault is probably related to some element that can affect the operation of all cylinders:
- - check check fuel quality,
- – check the condition and suitability of the spark plugs.
Make sure all problems are corrected.
Clear stored faults. Do not erase programming data.
To confirm repair results:
- - Troubleshoot electrical circuits.
- - Register programmable parameters.
- - Warm up the engine (at least 75 °C).
- – With the engine idling, turn on all electrical consumers for 15 minutes.
If the problem reappears, continue with the diagnosis.
- - Diagnose the catalytic converter by performing the appropriate after-sales service.
If the problem persists, check the following:
- - check engine speed and crankshaft position sensor,
- – check the condition and cleanliness of the flywheel ring gear,
- - check the fastening of the engine speed and crankshaft position sensor,
- - check the gap between the sensor and the flywheel ring gear,
- - check the compression in the engine cylinders,
- – check the entire fuel supply system,
- – check the entire ignition system,
- - check hydraulic tappets for camshaft knock
DF062 Cylinder #4 Misfire
Possible causes and effects:
- - mixture misfiring, leading to the destruction of the catalytic converter;
- - omissions leading to increased toxicity of exhaust gases
If the following faults are present or stored, deal with them first:
- - Ignition system: DF072, DF073, DF074 and DF075.
- - Fuel supply system: DF026, DF027, DF028, DF029 and DF085.
- - Engine speed sensor signal: DF005 and DF125.
- - Camshaft dephaser sensor and solenoid: DF080 and DF097.
Before proceeding with the diagnostics below, check that there are no misfires in the remaining cylinders.
Requirements for diagnostics for a stored fault:
A fault is declared present under the following conditions:
- - Check for electrical problems.
- – Programming must be done
- - The engine must be warm (at least 75°)
- – With the engine idling, turn on all electrical consumers for 15 minutes.
Misfire in cylinder #4 only
Probably, the malfunction is related to an element that can only affect this cylinder:
- - check the injector of cylinder #4,
- – check the condition and compliance of the spark plugs,
- - Check the ignition coil of the finger-cylinder.
If there are no deviations from the norm, check the same elements for cylinder # 1 (to eliminate the possibility of a mistake in determining the cylinder).
Misfires in cylinders #1 and #4 (see DF059)
The malfunction is probably related to some element that can affect the operation of a pair of cylinders:
- - check the circuits of the respective ignition coils (diagnose DF072or DF075),
- – check the condition and suitability of the spark plugs.
Misfires in all four cylinders (see DF059, DF060 and DF061)
The fault is probably related to some element that can affect the operation of all cylinders:
- – check fuel quality,
- – check the condition and suitability of the spark plugs.
AFTER REPAIR
Make sure all problems are corrected. Delete stored faults from memory. Do not erase programming data.
To confirm repair results:
- - Troubleshoot electrical circuits.
- - Register programmable parameters.
- - Warm up the engine (at least 75 °C).
- – With the engine idling, turn on all electrical consumers for 15 minutes.
If the problem reappears, continue with the diagnosis.
- - Diagnose the catalytic converter by performing the appropriate after-sales service.
DF065 Mixture Misfire
Possible causes and effects:
- - mixture misfiring, leading to the destruction of the catalytic converter;
- - omissions leading to increased toxicity of exhaust gases
If the following faults are present or stored, deal with them first:
- - Ignition system: DF072, DF073, DF074 and DF075.
- - System and fuel supply: DF026, DF027, DF028, DF029 and DF085.
- - Engine speed sensor signal: DF005 and DF125.
- - Camshaft dephaser sensor and solenoid: DF080 and DF097.
- - Cylinder Misfires: DF059, DF060, DF061 and DF062.
Requirements for diagnostics for a stored fault:
A fault is declared present under the following conditions:
- - Check for electrical problems.
- – Programming must be done
- - The engine must be warm (at least 75°)
- – With the engine idling, turn on all electrical consumers for 15 minutes.
Check the injectors.
Check the condition and suitability of the spark plugs.
Check the finger type ignition coils.
Check the quality of the fuel.
If the problem persists, check the following:
- - check engine speed and crankshaft position sensor,
- – check the condition and cleanliness of the flywheel ring gear,
- - check the fastening of the engine speed and crankshaft position sensor,
- - check the gap between the sensor and the flywheel ring gear,
- - check the compression in the engine cylinders,
- – check the entire fuel supply system,
- – check the entire ignition system,
- - check the hydraulic tappets for camshaft knocking.
If the problem persists, handle other problems and then proceed to compliance.
AFTER REPAIR
Make sure all problems are corrected. Do not erase programming data.
To confirm repair results:
- - Troubleshoot electrical circuits.
- - Register programmable parameters.
- - Warm up the engine (at least 75 °C).
- - With the engine idling, turn on all electrical consumers for 15 minutes. If the problem reappears, continue with the diagnosis.
DF072 Cylinder 1 ignition coil circuit
Fault cause: - Open circuit or short to ground
If faults DF046, DF084 or DF085 are present or stored, deal with them first.
If the Cylinder #4 Ignition Coil Circuit fault is also present or stored, treat it first.
Requirements for diagnostics for a stored fault:
The fault is declared present after the starter has been operated for 10 seconds or after a delay of 10 seconds with the engine running.
Disconnect the #1 cylinder finger ignition coil connector.
Check the cleanliness and condition of the finger coil and its connector.
Check the resistance of the primary and secondary windings of the cylinder 1 finger type ignition coil (see the table at the end of the article for values).
If the values are out of range, then replace the finger-type ignition coil.
Disconnect the battery and the injection computer.
Check the cleanliness of the contacts and the condition of the connector.
Connect the universal contact board instead of the ECU and check for open circuits and short circuits in the circuit:
ECU pin M4, connector C → Cylinder 1 ignition coil
Cylinder #4 ignition coil → Cylinder #1 ignition coil
(See connector pin number on corresponding wiring diagram).
If the problem persists, replace the defective finger-type ignition coil.
If the problem persists, handle other problems and then proceed to compliance.
Resistance tables of engine elements
ELECTRICAL RESISTANCE OF ELEMENTS K4J ENGINE
Ambient temperature ~ 20 ˚C:
Element - Resistance
- Injectors 14.5 ohm ±5%
- Throttle motor 1.6 ohm ±10%
- Canister purge solenoid valve 25 ohm ±20%
Finger type ignition coils
- Primary: 0.5 ohm ±5%
- Secondary: 10.7 kΩ ±15%
- Crankshaft speed and position sensor 230 ohm ± 20%
- Upstream oxygen sensor heating element 9 ohm ±10%
- Heater element for downstream oxygen sensor 9 ohm ±10%
Electrical resistance of elements, motor K4M
Ambient temperature ~ 20˚ C:
Motor Element - Resistance
- Injectors 14.5 ohm ±5%
- Throttle motor 2.2 ohm ±10%
- Canister purge solenoid valve 25 ohm ±20%
- Camshaft dephaser solenoid valve 7.2 ohm ±10%
Finger type ignition coils
- Primary: 0.5 ohm ±5%
- Secondary: 10.7 kΩ ±15%
- Crankshaft speed and position sensor 230 ohm ±20%
- Upstream oxygen sensor heating element 9 ohm ±10%
- Heater element for downstream oxygen sensor 9 ohm ±10%
Electrical resistance of elements, motor F4R
Ambient temperature ~ 20˚ C:
- Motor element - Resistance
- Injectors 14.5 ohm ±5%
- Throttle motor - 2.3 ohm ±10%
- Canister purge solenoid valve - 25 ohm ±20%
- Camshaft dephaser solenoid - 7.2 ohm ±10%
Finger type ignition coils:
- Primary: 0.5 ohm ±5%
- Secondary: 10.7 kΩ ±15%
- Crankshaft speed and position sensor 230 ohm ±20%
- Upstream oxygen sensor heating element 9 ohm ±10%
- Heater element for downstream oxygen sensor 9 ohm ±10%