Connect ECM/PCM connector terminal E31 and body ground with a jumper wire. ECM/PCM CONNECTOR E (31P) Wire side of female terminals 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. Turn the ignition switch OFF. 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. Remove the blown No. 6 ECU (ECM/PCM) (15A) fuse in the under-dash fuse/relay box.

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