B1080

DTC Troubleshooting: B1080

DTC B1080:

Power Supply Circuit (IG1 Line) Input Error for Relay Control Module and MICU

NOTE:

- Before troubleshooting, make sure the No. C12 (20 A) fuse in the driver's under-dash fuse/relay box and the No. B6 (7.5 A) fuse in the under-hood fuse/relay box are OK.
- If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0), and then back to ON (II).

3. Wait for at least 6 seconds.

4. Check for DTCs with the HDS.

Is DTC B1080 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections.

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

6. Disconnect relay control module connector B (16P).

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

8. Measure the voltage between relay control module connector B (16P) terminal No. 9 and body ground.





Is there battery voltage?

YES -

Replace the relay control module Under-Hood Fuse/Relay Box Removal and Installation.

NO -

Go to step 9.

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

10. Disconnect driver's under-dash fuse/relay box connector B (5P).

11. Connect driver's under-dash fuse/relay box connector B (5P) terminal No. 5 and body ground with a jumper wire.






12. Check for continuity between relay control module connector B (16P) terminal No. 9 and body ground.





Is there continuity?

YES -

Replace the relay control module Under-Hood Fuse/Relay Box Removal and Installation.

NO -

Repair an open or high resistance in the wire.