DTC U0127: Gauge Control Module Lost Communication With TPMS Control Unit (TPMS message)

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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).
Wait for at least 6 seconds.
Check for DTCs with the HDS.
Is DTC U0127 indicated?

YES -Go to step 5.

NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections.
Check for TPMS DTCs with the HDS.
Are any DTCs indicated?

YES -Go to the INDICATED DTCS TROUBLESHOOTING , then recheck.

NO -Go to step 6.
Turn the ignition switch to LOCK (0).
Disconnect the gauge control module 32P connector.
Disconnect the TPMS control unit 20P connector.
Check for continuity between gauge control module 32P connector terminals No. 19 and No. 20 and TPMS control unit 20P connector terminals No. 9 and No. 20 respectively.

Fig 1: Checking Continuity Between Gauge Control Module 32P Connector Terminals And TPMS Control Unit 20P Connector Terminals
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 REPLACEMENT ).

NO -Repair an open or poor connection in the F-CAN wire(s) between the TPMS control unit and the gauge control module.