B1177

DTC Troubleshooting: B1177

DTC B1177:

Abnormal Battery Voltage

1. Clear the DTCs with the HDS.

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

3. Check for DTCs with the HDS.

Is DTCs B1177 indicated?

YES -

Go to step 8.

NO -

Go to step 4.

4. Clear the DTCs with the HDS.

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

6. Crank the engine.

7. Check for DTCs with the HDS.

Is DTCs B1177 indicated?

YES -

Go to step 8.

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. The battery may have been discharged, and recovered.

8. Check the battery Battery Test and the charging system.

Are the battery condition normal and the charging system OK?

YES -

Go to step 9.

NO -

The battery needs a recharge or replacement, or the charging system needs repair.

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

10. With gauge control module connector B (28P) still connected, measure the voltage between terminal No. 1 and body ground.





Is the voltage above 7.5 V?

YES -

Replace the gauge control module Service and Repair.

NO -

Repair an open or high resistance in the IG1 line between the ignition switch and the gauge control module.