## VTEC/VTC System

#### DTC Troubleshooting (cont'd)

11-102

1. Measure voltage between ECM connector terminal A25 and body ground.

ECM CONNECTOR A (31P)

Wire side of female terminals

Is there about 5 V?

YES - Repair open in the wire between the ECM (A25) and CMP sensor.

NO - Go to step 11.

1. Turn the ignition switch OFF.

1. Disconnect ECM connector A (31P).

1. Check for continuity between ECM connector terminal A25 and body ground.

ECM CONNECTOR A (31P)

Wire side of female terminals

Is there continuity?

YES - Repair short in the wire between the ECM (A25) and the CMP sensor.

NO - Substitute a known-good ECM and recheck (see page 11-5). If symptom/indication goes away, replace the original ECM.

DTC P0341: VTC Phase Gap

1. Reset the ECM (see page 11-4).

1. Start the engine.

   Is DTC P0341 indicated?

YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the CMP sensor and at the ECM.

1. Check the VTC oil control solenoid valve (see page 11-107).

   Is the VTC oil control solenoid valve OK?

YES - Go to step 4.

NO - Clean the VTC oil control solenoid valve, or replace the VTC oil control solenoid valve.

1. Remove the head cover and check the timing chain (see page 6-16).

   Is the timing chain OK?

YES - Go to step 5.

NO - Repair or replace the timing chain.

1. Check the VTC actuator (see page 6-9).

   Is the VTC actuator OK?

YES - Substitute a known-good ECM and recheck (see page 11-5). If symptom/indication goes away, replace the original ECM.

NO - Replace the VTC actuator.

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