B1080

DTC B1080: Ignition Key Switch Circuit Malfunction

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Wait for 6 seconds or more.
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 OFF.
6. Disconnect the under-hood fuse/relay box connector D (10P).
7. Turn the ignition switch ON (II).




8. Measure the voltage between the under-hood fuse/relay box connector D (10P) No. 7 terminal and body ground.

Is there battery voltage?

YES - Substitute a known-good under-hood fuse/relay box and recheck.

NO - Go to step 9.

9. Turn the ignition switch OFF.




10. Check for continuity between the under-hood fuse/relay box connector D (10P) No. 7 terminal and body ground.

Is there continuity?

YES - Repair a short to ground in the wire. After repairing, replace the No. 21 (7.5 A) fuse in the under-dash fuse/relay box.

NO - Go to step 11.

11. Disconnect the under-dash fuse/relay box connector D (17P).




12. Connect the under-dash fuse/relay box connector D (17P) No. 6 terminal and body ground.




13. Check for continuity between the under-hood fuse/relay box connector D (10P) No. 7 terminal and body ground.

Is there continuity?

YES - Substitute a known-good under-dash fuse/relay box and recheck.

NO - Repair an open in the wire.

Multiplex Integrated Control System

DTC Troubleshooting Index

NOTE: Record all DTCs, and sort them by DTC type using the DTC troubleshooting index, then troubleshoot the DTC(s) in this order:

- Battery voltage DTCs
- Internal error DTCs
- Loss of communication DTCs (beginning with the lowest number first; for example, if B1005 and B1016 are retrieved, troubleshoot B1005 first).
- Signal error DTCs

B1000 - B1575:

MICU

B1050 - B1080:

Relay Control Module

B1150 - B1158:

Gauge Control Module

B1200 - B1241:

B1244 - B2991:

Climate Control Unit

B1250 - B1284:

Combination Switch Control Unit

B1350 - B1390:

Power Tailgate Control Unit

B1750 - B1792:

HandsFreeLink Control Unit

1900 - 1906:

Immobilizer Control Unit

1950 - 1959:

Rear MICU

B1800 - B1847:

Power Seat Control Unit

B2150 - B2191:

Driver's MPCS Unit

B2200 - B2240:

AcuraLink Control Unit