DTC B1173: Gauge Control Module Lost Communication with TPMS Control Unit (TPMS Message)
- Clear the DTCs with the HDS.
- Turn the ignition switch to LOCK (0), and then back to ON (II).
- Wait for at least 6 seconds.
- Check for DTCs with the HDS.
Is DTC B1173 indicated?
YES - Go to step 5.
NO - Intermittent failure, the F-CAN communication line is OK at this time. Check for loose or poor connections.
- Check for DTCs with the HDS.
Is DTC B1178 also indicated at the same time?
YES - Troubleshoot DTC B1178 (see DTC B1178: F-CAN COMMUNICATION LINE ERROR ).
NO - Go to step 6.
- 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 7.
- Turn the ignition switch to LOCK (0).
- Disconnect the gauge control module 36P connector.
- Disconnect TPMS control unit connector B (20P) ('07-08 models) or TPMS control unit 20P connector ('09-11 models).
- Check for continuity between gauge control module 36P connector terminals No. 28 and No. 29 and TPMS control unit connector B (20P) terminals No. 10 and No. 19 ('07-08 models) or TPMS control unit connector terminals (20P) No. 11 and No. 2 ('09-11 models) respectively.
Is there continuity?
YES - Go to step 11.
NO - Repair an open in the wire between the gauge control module and the TPMS control unit.
- Substitute a known-good TPMS control unit.
- Check for DTCs with the HDS.
Is DTC B1173 indicated?
YES - Replace the gauge control module.
NO - Replace the original TPMS control unit.