B1177

DTC B1177: Abnormal Battery Voltage (7.5 V)

1. Clear the DTCs using the HDS
2. Cycle the ignition switch to OFF and then back ON.
3. Check for DTCs by selecting the DTCs MENU (DTCs) from the HDS.

Is DTC B1177 indicated?

YES - Go to step 5.

NO - Go to step 4.

4. Crank the engine.

Is DTC B1177 indicated?

YES - Go to step 5.

NO - Intermittent failure The gauge control module and power supply voltage (IG1) that is supplied to the gauge control module are OK at this time.

5. Check the battery and the charging system.

Is the battery condition normal and the charging system OK?

YES - Go to step 6.

NO - Abnormal battery condition which needs a recharge or replacement, or a charging system repair.




6. With gauge control module connector B (18P) still connected, check for voltage between the No.10 terminal and body ground.

Is there 7.5 V or more?

YES - Go to step 7

NO - Repair an open or high resistance in the YEL wire between the gauge control module and under-dash fuse/relay box.




7. Check for voltage between the No.10 and No.9 terminals.

Is there 7.5 V or more?

YES - Faulty gauge control module; replace the gauge control module.

NO - Repair an open or high resistance in the BLK wire between the gauge control module and ground.