B1183

DTC Troubleshooting: B1183

DTC B1183:

Gauge Control Module Lost Communication With EPS Control Unit (EPS Message)

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.
- If the HDS does not communicate with the EPS control unit, the EPS indicator does not go off, and no EPS DTCs are stored. Go to symptom troubleshooting EPS Indicator Does Not Go Off, And No DTCs Are Stored.

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 B1183 indicated?

YES -

Go to step 5.

NO -

Intermittent failure. The gauge control module (tach) is OK at this time. Check for loose or poor connections.�

5. Check for DTCs with the HDS.

Are DTCs B1168, B1169, B1170, B1173, B1178, B1183, B1184, B1185, and B1187 all indicated at the same time?

YES -

Troubleshoot DTC B1178 B1178.�

NO -

Go to step 6.

6. Check for EPS DTCs with the HDS.

Are any DTCs indicated?

YES -

Go to the indicated DTCs, then recheck.

NO -

Go to step 7.

7. Turn the ignition switch to LOCK (0).

8. Disconnect the gauge control module (tach) 36P connector.

9. Disconnect the EPS control unit 28P connector Service and Repair.

10. Check for continuity between gauge control module (tach) 36P connector terminals No. 1 and No. 19 and EPS control unit 28P connector terminals No. 1 and No. 15 respectively.





Is there continuity?

YES -

Substitute a known-good EPS control unit, and recheck. If the indication goes away, replace the original EPS control unit Service and Repair. If the DTC is still present, replace the gauge control module (tach).�

NO -

Repair an open in the wire.�