DTC Troubleshooting: P0351, P0352, P0353, P0354 (K20C2)

DTC Troubleshooting: P0351, P0352, P0353, P0354

DTC P0351: No. 1 Cylinder Ignition Coil Circuit Malfunction
DTC P0352: No. 2 Cylinder Ignition Coil Circuit Malfunction
DTC P0353: No. 3 Cylinder Ignition Coil Circuit Malfunction
DTC P0354: No. 4 Cylinder Ignition Coil Circuit Malfunction

NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description	Confirmed DTC	Pending DTC
P0351 No. 1 Cylinder Ignition Coil Circuit Malfunction
P0352 No. 2 Cylinder Ignition Coil Circuit Malfunction
P0353 No. 3 Cylinder Ignition Coil Circuit Malfunction
P0354 No. 4 Cylinder Ignition Coil Circuit Malfunction

Problem verification:

Problem verification

?1.	Turn the vehicle to the ON mode.

?2.	Clear the DTC with the HDS.

?3.	Start the engine.

?4.

Check for Pending or Confirmed DTCs with the HDS.

DTC Description	Confirmed DTC	Pending DTC
P0351 No. 1 Cylinder Ignition Coil Circuit Malfunction
P0352 No. 2 Cylinder Ignition Coil Circuit Malfunction
P0353 No. 3 Cylinder Ignition Coil Circuit Malfunction
P0354 No. 4 Cylinder Ignition Coil Circuit Malfunction

Is DTC P0351, P0352, P0353, and/or P0354 indicated?


	YES

The failure is duplicated. Go to step 2.


	NO

Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the ignition coil and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?

Ignition coil check:

Ignition coil check

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.	Exchange the ignition coil from the problem cylinder with one from another cylinder.

?3.	Start the engine.

?4.

Check for Pending or Confirmed DTCs with the HDS.

DTC Description	Confirmed DTC	Pending DTC
P0351 No. 1 Cylinder Ignition Coil Circuit Malfunction
P0352 No. 2 Cylinder Ignition Coil Circuit Malfunction
P0353 No. 3 Cylinder Ignition Coil Circuit Malfunction
P0354 No. 4 Cylinder Ignition Coil Circuit Malfunction

Is DTC indicated at the exchanged position?


	YES

Replace the faulty ignition coil.?


	NO

Go to step 3.

Fuse check:

Fuse check

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.

Check the following fuse.

Fuse	No. A15 (15 A)
Location	Under-hood fuse/relay box

Is the fuse OK?


	YES

Go to step 4.


	NO

Check for a short in the IG COIL RLY OUT/IG1(IGN COIL) wire between the relay circuit board and the ignitions coil, and in the +B IG COIL wire between the No. A15 (15 A) fuse and the relay circuit board, and repair it as needed. Also replace the No. A15 (15 A) fuse.?

Relay circuit board check:

Relay circuit board check

?1.	Remove and test the relay circuit board.

Is the relay circuit board OK?


	YES

Go to step 5.


	NO

Replace the relay circuit board.?

Open wire check (IG COIL RLY OUT/IG1(IGN COIL) line):

Open wire check (IG COIL RLY OUT/IG1(IGN COIL) line)

?1.	Reinstall the relay circuit board.

?2.

Disconnect the following connector(s).

Ignition coil 3P connector (problem cylinder)

?3.	Turn the vehicle to the ON mode.

?4.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	Ignition coil 3P connector (problem cylinder): disconnected
Test point 1	Ignition coil 3P connector No. 1
Test point 2	Body ground

Is there battery voltage?


	YES

The IG COIL RLY OUT/IG1(IGN COIL) wire is OK. Go to step 6.


	NO

Repair an open in the IG COIL RLY OUT/IG1(IGN COIL) wire between the ignition coil and the relay circuit board.?

Open wire check (PG(COIL) line):

Open wire check (PG(COIL) line)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Ignition coil 3P connector (problem cylinder): disconnected
Test point 1	Ignition coil 3P connector No. 2
Test point 2	Body ground

Is there continuity?


	YES

The PG(COIL) wire is OK. Go to step 7.


	NO

Repair an open in the PG(COIL) wire between the ignition coil and G101.?

Shorted wire check (IGN lines):

Shorted wire check (IGN lines)

?1.	Jump the SCS line with the HDS, and wait more than 1 minute.

?2.

Disconnect the following connector.

PCM connector E (80P)

?3.

Check for continuity between body ground and the appropriate PCM connector terminal of the problem ignition coil (see table).

Test condition	Vehicle OFF (LOCK) mode
	Ignition coil 3P connector (problem cylinder): disconnected
	PCM connector E (80P): disconnected

Problem cylinder	DTC	Connector	Terminal
No. 1	P0351	PCM connector E (80P)	No. 37
No. 2	P0352		No. 38
No. 3	P0353		No. 39
No. 4	P0354		No. 40

Is there continuity?


	YES

Repair a short in the IGN wire(s) between the PCM and the ignition coil.?


	NO

The IGN wires are not shorted. Go to step 8.

Open wire check (IGN lines):

Open wire check (IGN lines)

?1.

Check for continuity between appropriate ignition coil 3P connector terminal No. 3 and the appropriate PCM connector terminal of the problem ignition coil (see table).

Test condition	Vehicle OFF (LOCK) mode
	Ignition coil 3P connector (problem cylinder): disconnected
	PCM connector E (80P): disconnected

Problem cylinder	DTC	Connector	Terminal
No. 1	P0351	PCM connector E (80P)	No. 37
No. 2	P0352		No. 38
No. 3	P0353		No. 39
No. 4	P0354		No. 40

Is there continuity?


	YES

The IGN wires are OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P0351, P0352, P0353, and/or P0354 goes away and the PCM was substituted, replace the original PCM.?


	NO

Repair an open in the IGN wire(s) between the PCM and the ignition coil.?