P0356

A : Ignition Coils -- P0351, P0352, P0353, P0354, P0355, P0356, P1367, P1368

NOTE: Unless multiple cylinder misfires are apparent, only one circuit will normally need to be tested. The DTC set will indicate which cylinder is misfiring.

A1 : CHECK COIL FUNCTION BY SUBSTITUTION
1. Replace the suspected faulty coil with a good one.
2. CLEAR the DTC. TEST the system for normal operation.

Does the same DTC reoccur? The DTC will indicate if the same cylinder is misfiring.

Yes
Goto A2
No
CLEAR the DTC. TEST the system for normal operation.

A2 : CHECK THE IGNITION COIL SUPPLY VOLTAGE CIRCUIT
1. Disconnect the relevant right-hand bank ignition coil electrical connector(s).
2. Turn the ignition switch to the ON position.
3. Measure the voltage between:
- Cyl 1A. PI002 pin 1, (RW) and GROUND.
- Cyl 2A. PI003 pin 1, (RW) and GROUND.
- Cyl 3A. PI004 pin 1, (RW) and GROUND.

4. Disconnect the relevant left-hand bank ignition coil electrical connector(s).
5. Measure the voltage between:
- Cyl 1B. PI006 pin 1, (RW) and GROUND.
- Cyl 2B. PI007 pin 1, (RW) and GROUND.
- Cyl 3B. PI008 pin 1, (RW) and GROUND.

Is the voltage greater than 10.5 Volts?

Yes
Goto A3

No
REPAIR the relevant ignition coil supply voltage circuit. For additional information, refer to wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

A3 : CHECK THE IGNITION COIL GROUND CIRCUIT
1. Switch the ignition to the OFF position.
2. Disconnect the relevant right-hand bank ignition coil electrical connector(s).
3. Measure the resistance between:
- Cyl 1A. PI002 pin 3, (B) and GROUND.
- Cyl 2A. PI003 pin 3, (B) and GROUND.
- Cyl 3A. PI004 pin 3, (B) and GROUND.

4. Disconnect the relevant left-hand bank ignition coil electrical connector(s).
5. Measure the resistance between:
- Cyl 1B. PI006 pin 3, (B) and GROUND.
- Cyl 2B. PI007 pin 3, (B) and GROUND.
- Cyl 3B. PI008 pin 3, (B) and GROUND.

Is the resistance less than 5 ohms?

Yes
Goto A4

No
REPAIR the relevant ignition coil ground circuit. For additional information, refer to wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

A4 : CHECK THE CONTINUITY OF THE IGNITION COIL TRIGGER SUPPLY CIRCUIT
1. Disconnect the PCM electrical connector PI001.
2. Check the continuity of the ignition coil trigger supply circuit between the relevant ignition coil electrical connector(s) and the PCM electrical connector:
- Cyl 1A. PI002 pin 4, (GU) and PI001 pin 87, (GU)
- Cyl 2A. PI003 pin 4, (Y) and PI001 pin 88, (Y)
- Cyl 3A. PI004 pin 4, (YR) and PI001 pin 89, (YR)
- Cyl 1B. PI006 pin 4, (GW) and PI001 pin 61, (GW)
- Cyl 2B. PI007 pin 4, (GW) and PI001 pin 62, (GW)
- Cyl 3B. PI008 pin 4, (GR) and PI001 pin 63, (GR)

Is the resistance less than 5 ohms?

Yes
Goto A5

No
REPAIR the ignition coil trigger supply circuit between the relevant ignition coil electrical connector(s) and the PCM electrical connector. CLEAR the DTCs. TEST the system for normal operation.

A5 : CHECK THE CONTINUITY BETWEEN THE IGNITION COIL AND THE PCM
1. Check the continuity of the ignition coil diagnostic signal circuit, between the ignition coil electrical connector(s) and the PCM electrical connector:
- Cyl 1A. PI002 pin 2, (GB) and PI001 pin 131, (GB)
- Cyl 2A. PI003 pin 2, (GB) and PI001 pin 131, (GB)
- Cyl 3A. PI004 pin 2, (GB) and PI001 pin 131, (GB)
- Cyl 1B. PI006 pin 2, (YB) and PI001 pin 132, (YB)
- Cyl 2B. PI007 pin 2, (YB) and PI001 pin 132, (YB)
- Cyl 3B. PI008 pin 2, (YB) and PI001 pin 132, (YB)

Is the resistance less than 5 Ohms?

Yes
INSTALL a new PCM. CLEAR the DTCs. TEST the system for normal operation.

No
REPAIR the circuit between the ignition coil electrical connector(s) and the PCM electrical connector. CLEAR the DTCs. TEST the system for normal operation.