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 13. NO - Substitute a known-good ECM/PCM and recheck, refer to the '01 Civic Shop Manual on this CD (see page 11-313). If symptom/indication goes away, replace the original ECM/PCM. Disconnect ECM/PCM connector A (31P). Measure voltage between body ground and ECM/PCM connector terminals A3 and A2 individually. ECM/PCM CONNECTOR A (31P) Wire side of female terminals Is there battery voltage? YES - Go to step 15. NO - Substitute a known-good ECM/PCM and recheck, refer to the '01 Civic Shop Manual on this CD (see page 11-313). If symptom/indication goes away, replace the original ECM/PCM.

Remove the glove box. Remove the PGM-FI main relay 1 (A). Measure voltage between body ground and ECM/PCM connector terminals A3 and A2 individually. ECM/PCM CONNECTOR A (31P) Wire side of female terminals Is there battery voltage? YES - Repair short to power in the wire between the ECM/PCM (A2, A3) and the PGM-FI main relay 1. NO - Replace the PGM-FI main relay 1.