Turn the ignition switch OFF. 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 45. NO - Go to step 42. Remove the PGM-FI main relay 1 (A).

Measure voltage between the PGM-FI main relay 1 4P connector terminal No. 4 and body ground. Wire side of female terminals Is there battery voltage? YES - Go to step 44. NO - Repair open in the wire between the No. 6 ECU (ECM/PCM) (15 A) fuse and the PGM-FI main relay 1. Check for continuity between the PGM-FI main relay 1 4P connector terminal No. 3 and ECM/PCM connector terminal E7. Wire side of female terminals Is there continuity? YES - Test the PGM-FI main relay 1 (see page 22-80). If the relay is OK, substitute a known-good ECM/PCM and recheck (see page 11-313). If symptom/indication goes away, replace the original ECM/PCM. NO - Repair open in the wire between the PGM-FI main relay 1 and the ECM/PCM (E7).