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DTC P0351 [L3]

BME010200300W01

DTC P0351 | Ignition coil No.1/No.4 control circuit malfunction
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DETECTION CONDITION | • If the ignition coil No.1/No.4 signal is less than 0.86 V or more than 4.37 V when the igniter is energized. The PCM determines that the ignition coil No.1/No.4 control circuit has a malfunction. Diagnostic support note • This is a continuous monitor (CCM).
• The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• The PENDING CODE is available if PCM detects the above malfunction condition.
• The FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.
POSSIBLE CAUSE | • Ignition coil malfunction • Connector or terminal malfunction • Short to ground between ignition coil terminal C and PCM terminal 1A • Short to power between ignition coil terminal C and PCM terminal 1A • Open circuit between ignition coil terminal C and PCM terminal 1A
• Open circuit between ignition coil terminal B and ignition switch
• PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related service repair information availability. • Is any related repair information available? | Yes | Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
No | Go to the next step.
3 | INSPECT POOR CONNECTION OF IGNITION COIL CONNECTOR • Turn the ignition switch off. • Disconnect the ignition coil connector. • Inspect for poor connection (such as damaged, pulled-out pins, and corrosion). • Is there any malfunction? | Yes | Repair or replace terminal, then go to Step 10.
No | Go to next step.
4 | INSPECT IGNITION COIL ELECTRICAL MALFUNCTION • Inspect the ignition coil. (See IGNITION COIL INSPECTION [L3].) • Is the ignition coil normal? | Yes | Go to next step.
No | Replace ignition coil, then go to Step 10.
5 | INSPECT CONTROL CIRCUIT FOR SHORT TO POWER • Turn the ignition switch to the ON position (Engine off). • Measure voltage between following terminal and body ground:

  - Ignition coil terminal C (wiring harness-side)

• Is voltage B+?
Yes
Repair or replace wiring harness, then go to Step 10.
No | Go to next step.
6 | INSPECT CONTROL CIRCUIT FOR SHORT TO GROUND • Turn the ignition switch off. • Inspect continuity between Ignition coil terminal C (wiring harness-side) and body ground. • Is there continuity? | Yes | Repair or replace wiring harness, then go to Step 10.
No | Go to next step.
7 | INSPECT POOR CONNECTION OF PCM CONNECTOR • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect for poor connection (such as damaged, pulled-out pins, and corrosion). • Is there any malfunction? | Yes | Repair terminal, then go to Step 10.
No | Go to next step.
8 | INSPECT CONTROL CIRCUIT MALFUNCTION FOR OPEN CIRCUIT • Inspect continuity between ignition coil terminal C (wiring harness-side) and PCM terminal 1A (wiring harness-side). • Is there continuity? | Yes | Go to next step.
No | Repair or replace wiring harness, then go to Step 10.
9 | INSPECT POWER CIRCUIT MALFUNCTION FOR OPEN CIRCUIT • Inspect continuity between ignition coil terminal B (wiring harness-side) and ignition switch. • Is there continuity? | Yes | Go to next step.
No | Repair or replace wiring harness, then go to Step 10.
10 | VERIFY TROUBLESHOOTING OF DTC P0351 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC using WDS or equivalent. • Start the engine. • Is same DTC present? | Yes | Replace the PCM, then go to next step. (See PCM REMOVAL/INSTALLATION [L3].)
No | Go to next step.
11 | VERIFY AFTER REPAIR PROCEDURE • Perform "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [L3].) • Are any DTCs present? | Yes | Go to applicable DTC troubleshooting. (See DTC TABLE [L3].)
No | Troubleshooting completed.