2010 Acura Truck MDX V6-3.7L Page 60

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.?

5. Check for Fuel and Emissions Systems DTCs with the HDS.

Are there any DTCs indicated?

YES -

Go to and troubleshoot the indicated DTCs, then recheck.?

NO -

Go to step 6.

6. Turn the ignition switch to LOCK (0).

7. Disconnect gauge control module connector A (12P).

8. Jump the SCS line with the HDS.

9. Disconnect PCM connector A (49P).

10. Check for continuity between PCM connector A (49P) terminals No. 48 and No. 49 and gauge control module connector A (12P) connector

terminals No. 12 and No. 6 respectively.

Is there continuity?

YES -

Update the PCM if it does not have the latest software See: Powertrain Management/Computers and Control Systems/Engine Control

Module/Testing and Inspection/Programming and Relearning/PCM Update, or substitute a known-good PCM, and recheck. If the indication goes

away, replace the original PCM See: Powertrain Management/Computers and Control Systems/Engine Control Module/Service and Repair. If the

DTC is still present, replace the gauge control module See: Instrument Panel, Gauges and Warning Indicators/Instrument Cluster / Carrier/Service

and Repair.?

NO -

Repair an open in the wire.?

2010 Acura Truck MDX V6-3.7L Page 61

DTC Troubleshooting: B1168, B1169, B1178

DTC B1168:

Gauge Control Module Lost Communication with PCM (ENG Message)

DTC B1169:

Gauge Control Module Lost Communication with PCM (A/T Message)

DTC B1178:

F-CAN Communication Line Error

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A See: Powertrain

Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests and General Diagnostics/Troubleshooting

- B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0), and then back to ON (II).

3. Wait for at least 6 seconds.

4. 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.?

5. Check for Fuel and Emissions Systems DTCs with the HDS.

Are there any DTCs indicated?

YES -

Go to and troubleshoot the indicated DTCs, then recheck.?

NO -

Go to step 6.

6. Turn the ignition switch to LOCK (0).

7. Disconnect gauge control module connector A (12P).

8. Jump the SCS line with the HDS.

9. Disconnect PCM connector A (49P).

10. Check for continuity between PCM connector A (49P) terminals No. 48 and No. 49 and gauge control module connector A (12P) connector

terminals No. 12 and No. 6 respectively.