B1177

DTC Troubleshooting: B1177

DTC B1177:

Abnormal Battery Voltage

NOTE: 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. Check for DTCs with 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. The battery may have been discharged, and recovered.�

5. Check the battery Testing and Inspection and the charging system.

Is the battery condition normal and the charging system OK?

YES -

Go to step 6.

NO -

Abnormal battery condition that needs a recharge or replacement, or a charging system repair.�

6. With gauge control module connector A (20P) still connected, turn the ignition switch to ON (II), and measure the voltage between terminal No. 20 and body ground.





Is there battery voltage?

YES -

Go to step 7.

NO -

Repair an open or high resistance in the wire.�

7. Measure the voltage between gauge control module connector A (20P) terminal No. 20 and C (20P) terminal No. 10.





Is there battery voltage?

YES -

Replace the gauge control module Service and Repair.�

NO -

Repair an open or high resistance in the ground wire or poor ground (G402).�