B1036

DTC Troubleshooting: B1036

DTC B1036: IG1 Power Supply Circuit Malfunction

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 B1036 indicated?
YES - Go to step 5.

NO - Intermittent failure, the system is OK at this time. Check for loose or poor connection at the gauge control module 32P connector, and at under-dash fuse/relay box connector Q (16P). If the connections are good, check the battery condition Testing and Inspection and the charging system.


5. Measure the voltage between the gauge control module 32P connector terminal No. 32 and body ground.

Is there battery voltage?
YES - Faulty MICU or an open in the under-dash fuse/relay box internal circuit. Substitute a known-good under-dash fuse/relay box and recheck.

NO - Check for No. 22 (7.5 A) in the under-dash fuse/relay box. If the fuse is OK, check for an open in the wire between the under-dash fuse/relay box and the gauge control module, or repair a short in the wire between the under-dash fuse/relay box and the gauge control module.