DTC B1173: Gauge Control Module Lost Communication with the TPMS Control Unit (TPMS Message)
WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
- Clear the DTCs with the HDS.
- Turn the ignition switch to LOCK (0), and then back ON (II).
- Wait for 6 seconds or more.
- 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 between the gauge control module and the TPMS control unit.
- Check for TPMS DTCs with the HDS (see
GENERAL TROUBLESHOOTING INFORMATION
).
Are there any DTCs indicated?
YES - Go to the indicated DTCs, then recheck.
NO - Go to step 6.
- Turn the ignition switch to LOCK (0).
- Disconnect gauge control module connector A (12P).
- Disconnect the TPMS control unit 20P connector.
- Connect gauge control module connector A (12P) connector No. 6 and No. 12 terminals and body ground with jumper wires.
- Check for continuity between body ground and the TPMS control unit 20P connector No. 1 and No. 11 terminals individually.Fig 2: Identifying Continuity Between Body Ground And TPMS Control Unit 20P Connector Terminals 1 And 11
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES - Substitute a known-good TPMS control unit (see TPMS CONTROL UNIT REPLACEMENT ), and recheck. If the indication goes away, replace the original TPMS control unit (see TPMS CONTROL UNIT REPLACEMENT ). If the DTC is still present, replace the gauge control module (see GAUGE CONTROL MODULE INPUT TEST ).
NO - Repair open in the wire.