B1173

DTC Troubleshooting: B1173

DTC B1173:

Gauge Control Module Lost Communication With the TPMS Control Unit (TPMS Message) ('08-11 USA models)

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 dose not communicate with the TPMS control unit, the TPMS indicator does not go off, and no TPMS DTCs are stored. Go to symptom troubleshooting Low tire Pressure Indicator Does Not Come On, 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 B1173 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections.�

5. Check for TPMS DTCs with the HDS.

Are any DTCs indicated?

YES -

Go to the indicated DTCs, then recheck.

NO -

Go to step 6.

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

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

8. Disconnect the TPMS control unit 20P connector.

9. Check for continuity between gauge control module (tach) 36P connector terminals No. 1 and No. 19 and TPMS control unit 20P connector terminals No. 2 and No. 11 respectively.





Is there continuity?

YES -

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

NO -

Repair an open in the wire.�