Injector Control Module Relay Circuit Troubleshooting

Injector Control Module Relay Circuit Troubleshooting

1. Turn the ignition switch to LOCK (0).

2. Remove the driver's dashboard undercover. Drivers Dashboard Undercover Removal/Installation

3. Remove the injector control module relay (A).






4. Connect injector control module relay 5P connector terminal No. 3 to body ground with a jumper wire.

5. Jump the SCS line with the HDS.

6. Disconnect PCM connector A (44P).






7. Check for continuity between body ground and PCM connector terminal A15.

Is there continuity?
YES - Go to step 8.

NO - Repair open in the wire between the injector control module relay and the PCM (A15).






8. Measure the voltage between injector control module relay 5P connector terminal No. 1 and body ground.

Is there battery voltage?
YES - Go to step 9.

NO -
- Repair open in the wire between the injector control module relay and the No. 5 +B INJ (15 A) fuse in the under-dash fuse/relay box. Also replace the No. 5 +B INJ (15 A) fuse in the under-dash fuse/relay box.

- Repair open in the wire between the No. 5 +B INJ (15 A) fuse in the under-dash fuse/relay box and the No. 5 +B OP MAIN (80 A) fuse in the under-hood fuse/relay box. Also replace the No. 5 +B OP MAIN (80 A) fuse in the under-hood fuse/relay box.

- If needed, replace the under-hood fuse/relay box, Under-Hood Fuse/Relay Box Removal and Installation or the under-dash fuse/relay box. Under-Dash Fuse/Relay Box Removal and Installation







9. Turn the ignition switch to ON (II).

10. Measure the voltage between injector control module relay 5P connector terminal No. 5 and body ground.

Is there battery voltage?
YES - Go to step 11.

NO - Repair open in the wire between the injector control module relay and PGM-FI main relay 1.






11. Turn the ignition switch to LOCK (0).

12. Reconnect the injector control module relay and PCM connector A (44P).

13. Open the SCS line with the HDS.

14. Turn the ignition switch to ON (II).

15. Measure the voltage between injector control module relay 5P connector terminal No. 2 and body ground.

Is there battery voltage?
YES - Repair open in the wire between the injector control module relay, the injector control module, the injector, or the fuel shut-off solenoid valve relay.

NO - Go to step 16.






16. Test the injector control module relay. Power Relay Test

Is the injector control module relay OK?
YES - Update the PCM if it does not have the latest software, PCM Update or substitute a known-good PCM, Initial Inspection and Diagnostic Overview then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM. Service and Repair

NO - Replace the injector control module relay.