DTC B1178: F-CAN Communication Line Error; DTC B1168: Gauge Control Module Lost Communication with ECM/PCM (Engine Messages); DTC B1169: Gauge Control Module Lost Communication with PCM (A/T Messages)
WARNING: This page is about a different car, the 2008 Acura TSX, 2007 Acura TSX, 2006 Acura TSX, 2005 Acura TSX, and 2004 Acura TSX. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
If you are troubleshooting multiple DTC's, 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 using the HDS.
- Turn the ignition switch OFF then back to the ON (II).
- Start and run the engine for at least 5 seconds then turn the engine off.
- Check for DTCs using the HDS.
Is DTC B1178, B1168, and/or B1169 indicated ?
YES -Go to step 5.
NO -Intermittent failure, the F-CAN communication line is OK at this time. Check for loose or poor connections. If the connections are good, check the battery condition (see BATTERY TEST ) and the charging system (see CHARGING SYSTEM INDICATOR CIRCUIT TROUBLESHOOTING ).
- Check for DTCs in the ECM/PCM.
Are any DTCs indicated?
YES -Troubleshoot the ECM/PCM DTCs.
NO -Go to step 6.
- Perform the Gauge Control Module Input Test (see GAUGE CONTROL MODULE INPUT TEST
).
Are ail inputs OK?
YES -Go to step 7.
NO -Repair the faulty input then recheck for DTCs.
- Substitute a know-good gauge control module.
- Clear the DTCs using the HDS.
- Turn the ignition switch OFF then back to the ON (II).
- Start and run the engine for at least 5 seconds then turn the engine off.
- Check for DTCs using the HDS.
Is DTC B1178, B1168, and/or B1169 indicated?
YES -Replace the ECM/PCM.
NO -The original gauge control module is faulty; replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).