## PGM-FI System

#### MIL Circuit Troubleshooting (cont'd)

11-541

8. Connect ECM/PCM connector terminal E31 and body ground with a jumper wire.

ECM/PCM CONNECTOR E (31P)

Wire side of female terminals

9. Turn the ignition switch ON (II).

Is the MIL on?

YES | - Substitute a known-good ECM/PCM and recheck. If symptom/indication goes away, replace the original ECM/PCM.
NO | - Check for an open in the wires between the ECM/PCM (E31) and the gauge assembly. Also check for a blown MIL bulb. If the wires and the bulb are OK, replace the gauge assembly.

10. Turn the ignition switch OFF.
11. Inspect the No. 6 ECU (ECM/PCM) (15A) fuse in the under-hood fuse/relay box.

Is the fuse OK?

YES | - Go to step 18.
NO | - Go to step 12.

12. Remove the blown No. 6 ECU (ECM/PCM) (15A) fuse in the under-dash fuse/relay box.

13. Remove the PGM-FI main relay 1 (A).

14. Check for continuity between body ground and the PGM-FI main relay 1 4P connector terminals No. 2 and No. 4 individually.

Wire side of female terminals

Is there continuity?

YES | - Repair short in the wire between the No. 6 ECU (ECM/PCM) (15A) fuse and the PGM-FI main relay 1. Also replace the No. 6 ECU (ECM/PCM) (15A) fuse.
NO | - Go to step 15.