B1173

DTC B1173: Gauge Assembly Lost Communication with TPMS Control Unit (TPMS message)

DTC B1178: F-CAN Communication Line Error

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Wait for 6 seconds or more.
4. Check for DTCs with the HDS.

Are DTCs B1173 or 1178 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.

Is any DTCs indicated?

YES - Go to the indicated DTCs, then recheck.

NO - Go to step 6.

6. Turn the ignition switch OFF.
7. Disconnect gauge assembly connector A (22P).
8. Disconnect the TPMS control unit 20P connector.
9. Check for continuity between gauge assembly connector A (22P) No. 21 and No. 22 terminals and body ground individually.






Is there continuity?

YES - Repair the short to body ground on the appropriate write.

NO - Go to step 10.

10. Check for continuity between gauge assembly connector A (22P) No. 21 and No. 22 terminals.






Is there continuity?

YES - Repair short in the wire between gauge assembly A (22P) connector No. 21 (CAN2 L Line) and No. 22 (CAN2 H Line) terminals.

NO - Go to step 11.

11. Check for continuity between gauge assembly connector A (22P) No. 21 and No. 22 terminals and the TPMS control unit 20P connector No. 1 and No. 11 terminals 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. If the DTC is still present, replace the gauge assembly.

NO - Repair an open in the wire.