DTC B1183: Gauge Control Module Lost Communication with the EPS Control Unit (EPS 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 OFF, and then back ON (II).
Wait for 6 seconds or more.
Check for DTCs with the HDS.
Is DTC B1183 indicated?

YES -Go to step 5.

NO -Intermittent failure. The gauge control module (tach) is OK at this time. Check for loose or poor connections.
Check for DTCs with the HDS.
Are DTCs B1168, B1169, B1178, B1183, B1184, B1185, and B1187 all indicated at the same time?

YES -Troubleshoot DTC B1178.

NO -Go to step 6.
Check for EPS DTCs with the HDS.
Are any DTCs indicated?

YES -Troubleshoot the indicated DTC, then recheck.

NO -Go to step 7.
Turn the ignition switch OFF.
Disconnect the GAUGE CONTROL MODULE (TACH) 36P connector.
Disconnect the EPS control unit 28P connector (see EPS CONTROL UNIT REMOVAL/INSTALLATION ).
Check for continuity between the GAUGE CONTROL MODULE (TACH) 36P connector No. 1 and No. 19 and EPS control unit 28P connector No. 1 and No. 15 terminals individually.

Fig 1: Checking Continuity Between Gauge Control Module (Tach) 36P Connector 1 And 19
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Are there continuity?

YES -Substitute a known-good EPS control unit (see EPS CONTROL UNIT REMOVAL/INSTALLATION ) and recheck. If DTC B1183 is still indicated, replace the gauge control module (tach).

NO -Repair an open in the wire.