B2982

DTC Troubleshooting: B2982 (BUS communication error)

DTC B2982 or BUS communication error is indicated:

Climate Control Unit Lost Communication with Servo Unit

1. Clear the DTC with the HDS.

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

3. Do the self-diagnostic with the HDS or the climate control unit.

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 Climate Control Unit Removal/Installation. If the symptom/indication continues, replace the A/C wire harness.�

NO -

Replace the control motor with a problem.�