## PGM-FI System

#### DTC Troubleshooting

11-75

DTC 34: ECM/PCM Power Source Circuit Unexpected Voltage

1. Reset the ECM/PCM, refer to the '01 Civic Shop Manual on this CD (see page 11-468).
2. Turn the ignition switch OFF.
3. Wait 5 seconds.
4. Turn the ignition switch ON (II).

Is the MIL on and does it indicated DTC 34?

YES - Go to step 5.

NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the No. 6 ECU (ECM/PCM) (15A) fuse in the under-hood fuse/relay box and at the ECM/PCM.

5. Turn the ignition switch OFF.
6. Disconnect ECM/PCM connector E (31P).
7. Measure voltage between ECM/PCM connector terminal E7 and body ground.

ECM/PCM CONNECTOR E (31P)

Wire side of female terminals

Is there battery voltage?

YES - Go to step 11.

NO - Go to step 8.

8. Remove the glove box.
9. Remove the PGM-FI main relay 1 (A).

10. Check for continuity between ECM/PCM connector terminal E7 and body ground.

ECM/PCM CONNECTOR E (31P)

Wire side of female terminals

Is there continuity?

YES - Repair short in the wire between the ECM/PCM (E7) and the PGM-FI main relay 1.

NO - Replace the PGM-FI main relay 1.

11. Reconnect ECM/PCM connector E (31P).