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 Driver's 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.�
- Repair open in the wire between the No. 5 +B INJ (15 A) fuse in the under-dash fuse/relay box and the No. 2 OP MAIN (80 A) fuse in the under-hood fuse/relay box. Also replace the No. 2 OP MAIN (80 A) fuse.�
- 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 and 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 Testing and Inspection.

Is the injector control module relay OK?

YES -

Reconnect all connectors, then update the PCM if it does not have the latest software ECM/PCM Update, or substitute a known-good PCM, then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM Service and Repair.�

NO -

Replace the injector control module relay.�