B1173

DTC B1173: Gauge Control Module Lost Communication with TPMS Control Unit (TPMS Message)

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Check for DTCs with the HDS.

Is DTC B1173 indicated?

YES - Go to step 4.

NO - Intermittent failure, the F-CAN communication line is OK at this time. Check for loose or poor connections. If the connections are good, check the battery condition, and the charging system.

4. Check for DTCs with the HDS.

Are DTC B1178 also indicated at the same time?

YES - Troubleshoot DTC B1178.

NO - Go to step 5.

5. Check for the DTCs in the TPMS with the HDS.

Are any DTCs indicated?

YES - Troubleshoot the indicated TPMS DTCs, then recheck the DTCs.

NO - Go to step 6.

6. Turn the ignition switch OFF.
7. Disconnect the gauge control module 36P connector.
8. Disconnect the TPMS control unit 20P connector.




9. Check for continuity between the No. 28 and No. 29 terminals of the gauge control module 36P connector and the No. 10 and No. 19 terminals of the TPMS control unit connector B (20P) respectively.

Is there continuity?

YES - Go to step 10.

NO - Repair an open in the wire between the gauge control module and the TPMS control unit.

10. Substitute a known-good TPMS control unit.
11. Check for DTCs with the HDS.

Is DTC B1173 indicated?

YES - Replace the gauge control module.

NO - Replace the original TPMS control unit.