PGM-FI Main Relay Circuit Testing: RSX
- Remove fuel tank filler cap. Listen for fuel pump operation at fuel tank fill port. Fuel pump should operate for 2 seconds after ignition switch is turned on. If fuel pump operates as specified, fuel pump is okay. If fuel pump does not operate as specified, go to next step.
- Turn ignition switch off. Remove glove box, then remove PGM-FI main relay No. 2. See Fig 1
. Turn ignition switch on, measure voltage in Yellow/Black wire between PGM-FI No. 2, 4-pin harness connector and body ground. If voltage is present, go to next step. If voltage is not present, repair open in Black/Yellow wire between PGM-FI main relay No. 1 and PGM-FI main relay No. 2.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
- Using a voltmeter connected to ground, check for battery voltage at PGM-FI relay No. 2 4-pin harness connector terminal No. 1. With ignition switch still on, if battery voltage is present, go to next step. If battery voltage is not present, repair open in Black/Yellow wire between under-dash fuse/relay box fuse No. 17 and PGM-FI main relay No. 2, 4-pin harness connector. See WIRING DIAGRAMS article. Repair as necessary. Repair as necessary.
- Turn ignition switch off. Disconnect White ECM/PCM 31-pin harness connector "E". Using ohmmeter check for continuity in Green/Yellow between PGM-FI main relay No. 2, 4-pin harness connector and White ECM/PCM 31-pin harness connector terminal No. 1. If continuity is present, go to next step. If continuity is not present, repair open in Green/Yellow wire between PGM-FI main relay No. 2, 4-pin harness connector and White ECM/PCM 31-pin harness connector terminal No. 1.
- Reinstall PGM-FI main relay No. 2. Turn ignition switch on. Using voltmeter connected to ground, measure voltage at White ECM/PCM 31-pin harness connector terminal No. 1 (Green/Yellow wire). If battery voltage is present, go to next step. If battery voltage is not present, replace PGM-FI main relay No. 2
- Turn ignition switch off. Reconnect White ECM/PCM 31-pin harness connector. Turn ignition switch on. Using voltmeter connected to ground, measure voltage at White ECM/PCM 31-pin harness connector terminal No. 1. If battery voltage was present within the first 2 seconds after the ignition key was turned on, update ECM/PCM (if it does not latest software) or replace with known-good ECM/PCM, then recheck. If symptom goes away, replace original ECM/PCM. If battery voltage was not present, go to next step.
- Turn ignition switch off. Remove rear seat cushion. Remove access panel from floor. Using voltmeter connected to ground, measure voltage at fuel pump 5-pin connector terminal No. 5 within the first 2 seconds of turning the ignition switch on. If battery voltage was present, go to step 9
. If battery voltage was not present, go to next step.
- Turn ignition switch off. Remove PGM-FI main relay No. 2. Connect fused jumper wire between PGM-FI 4-pin harness connector terminals No. 1 (Black/Yellow wire) and 2 (Yellow/ Black wire). See WIRING DIAGRAMS article. Turn ignition switch on. Using voltmeter connected to ground, measure voltage at fuel pump 5-pin harness connector terminal No. 5 within first 2 seconds after ignition is turned on. If battery voltage was present, replace PGM-FI main relay No. 2. If battery voltage was not present, repair open in Yellow/Blue wire between PGM-FI main relay No. 2 and fuel pump 5-pin harness connector.
- Turn ignition switch off. Using ohmmeter connected to ground, check for continuity at fuel pump 5-pin harness connector terminal No. 4. If continuity is present, replace fuel pump. If continuity is not present, repair open in Black wire between fuel pump 5-pin harness connector terminal No. 4 and ground terminal G501.