DTC Troubleshooting: B2982 (K and AUTO)
DTC B2982 or DTC indicator K and AUTO:
Heater Control Unit Lost Communication with Each Control Motor
  1. Clear the DTC with the HDS.
  1. Turn the ignition switch OFF and then ON (II).
  1. Do the self-diagnostic with the HDS or heater control unit.
  1. Check for DTCs.
Is DTC B2982 or K and AUTO indicated?
YES -
Go to Step 5 .
NO -
Intermittent failure, check for loose wires or poor connections on the heater control unit and each control motor circuit.■
  1. Turn the ignition switch OFF.
  1. Disconnect the heater control unit 32P connector.
  1. Check for continuity between body ground and the heater control unit 32P connector terminals No. 25 and No. 26 individually.
Is there continuity?
YES -
Go to Step 8 .
NO -
Go to Step 10 .
  1. Disconnect the A/C wire harness from the dashboard wire harness.