BUS Communication Error Is Indicated

DTC Troubleshooting: B2982 or BUS communication error is indicated

DTC B2982 or BUS communication error is indicated: Climate Control Unit Lost Communication with Each Control Motor

1. Clear the DTC with the HDS.

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

3. Do the self-diagnostic with the HDS Initial Inspection and Diagnostic Overview or climate control unit. Initial Inspection and Diagnostic Overview

4. Check for DTCs.

Is DTC B2982 or BUS communication error indicated?
YES - Go to step 5.

NO - Intermittent failure, check for loose wires or poor connections on the each control motor circuit.


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

6. Test the driver's air mix control motor, Driver's Air Mix Control Motor Test the passenger's air mix control motor, Passenger's Air Mix Control Motor Test the driver's cool vent control motor, Driver's Cool Vent Control Motor Test the passenger's cool vent control motor, Passenger's Cool Vent Control Motor Test the mode control motor, Mode Control Motor Test the recirculation control motor, Recirculation Control Motor Test and the rear vent control motor. Rear Vent Control Motor Test

Is each control motor OK?
YES - Check for loose wires or poor connections at the climate control unit 40P connector and at the each control motor 5P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit. If the symptom/indication continues, replace the A/C wire harness.

NO - Replace the control motor with a problem.