DTC U0151: Gauge Control Module Lost Communication with SRS Unit (SRS 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 )
If the HDS does not communicate with the SRS unit, the SRS indicator stay on, go to symptom troubleshooting for SRS indicator stay on, but no DTCs are stored (see SYMPTOM TROUBLESHOOTING )

Clear the DTCs with the HDS
Turn the ignition switch to LOCK (0) and then back to ON (II)
Wait for 6 seconds or more
Check for DTCs with the HDS
Is DTC U0151 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 SRS unit
Check for SRS DTCs with the HDS
Is any DTCs indicated?

YES -Go to the indicated DTC's troubleshooting, then recheck

NO -Go to step 6
Turn the ignition switch to LOCK (0)
Do the battery terminal disconnection procedure (see BATTERY TERMINAL DISCONNECTION AND RECONNECTION ), then wait for 3 minutes
Disconnect the gauge control module 32P connector
Disconnect SRS unit connector A (39P)
Check for continuity between gauge control module 32P connector terminals No 21 and No 22 and SRS unit connector A (39P) terminals No 16 and No 17 respectively

Fig 1: Identifying Continuity Between Gauge Control Module 32P Connector Terminals No 21 And No 22 And SRS Unit Connector A (39P) Terminals No 16 And No 17
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Substitute a known-good SRS unit (see SRS UNIT REPLACEMENT ), and recheck If the indication goes away, replace the original SRS unit If the DTC is still present, replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT )

NO -Repair an open in the wire