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

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A. See TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A .

Clear the DTCs with the HDS.
Turn the ignition switch to LOCK (0), and then back to ON (II).
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. See BATTERY TEST ) and the charging system. See ALTERNATOR AND REGULATOR CIRCUIT TROUBLESHOOTING .
Check for TPMS DTCs with the HDS.
Are any DTCs indicated?

YES -Go to the indicated DTCs troubleshooting.

NO -Go to step 5.
Do the gauge control module input test. See GAUGE CONTROL MODULE INPUT TEST .
Are all inputs OK?

YES -Go to step 6.

NO -Repair the faulty input, then recheck for DTCs.
Substitute a known-good gauge control module.
Clear the DTCs with the HDS.
Turn the ignition switch to LOCK (0), and then back to ON (II).
Check for DTCs with the HDS.

Is DTC B1173 indicated?

YES -Substitute a known-good TPMS control unit, and recheck.

NO -The original gauge control module is faulty; replace it. See GAUGE CONTROL MODULE REPLACEMENT .