DTC B1168: Gauge Control Module Lost Communication with the PCM (Engine Message); DTC B1169: Gauge Control Module Lost Communication With the PCM (A/T Message); DTC B1178: F-CAN Communication Circuit Error
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 6 seconds or more.
- Check for DTCs with the HDS.
Is DTC B1168, B1169, and/or B1178 indicated?
YES -Go to step 5.
NO -Intermittent failure, the system is OK at this time. Check for loose or poor connection between the gauge control module and the PCM. ■
- Check for Fuel and Emissions Systems DTCs with the HDS.
Are there 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).
- Disconnect gauge control module connector B (14P).
- Jump the SCS line with the HDS.
- Disconnect PCM connector A (49P).
- Check for continuity between gauge control module connector B (14P) terminals No. 1 and No. 8 and PCM connector A (49P) terminals No. 48 and No. 49 respectively.Fig 1: Checking Continuity Between Gauge Control Module Connector B (14P) Terminals No. 1/No. 8 & PCM Connector A (49P) Terminals No. 48/No. 49 Respectively
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Update the PCM if it does not have the latest software (see KNOCK SENSOR REPLACEMENT ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ), and recheck. If the indication goes away, replace the original PCM (see PCM REPLACEMENT ). If the DTC is still present, replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ). ■
NO -Repair an open or high resistance in the wire. ■