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. Disconnect the VSA modulator-control unit 46P connector.
9. Check for continuity between VSA modulator-control unit 46P connector terminals No. 38 and No. 39 and gauge control module connector
A (12P) connector terminals No. 6 and No. 12 respectively.
Is there continuity?
YES -
Update the VSA modulator-control unit if it does not have the latest software See: Brakes and Traction Control/Antilock Brakes / Traction Control
Systems/Traction Control Module/Testing and Inspection, or substitute a known-good VSA modulator-control unit See: Brakes and Traction
Control/Antilock Brakes / Traction Control Systems/Traction Control Module/Service and Repair, and recheck. If the indication goes away, replace
the original VSA modulator-control unit See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Traction 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.?
B1171
DTC Troubleshooting: B1171
DTC B1171:
Gauge Control Module Lost Communication with Adaptive Cruise Control Unit (ACC Message)
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.
