B2970

DTC B2970: Climate Control Unit Lost Communication with Relay Control Module (RM message)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in the B-can system diagnosis test mode A.

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Wait for 6 seconds or more.
4. Do the self-diagnostic with the HDS.
5. Check the DTCs.

Is DTC B2970 indicated?

YES - Go to step 6.

NO - Intermittent failure, check for loose wire or poor connection on the climate control unit connector A (40P).

6. Check for DTCs with the HDS.

Are any of the following DTCs indicated; B1005, B1959, B2162 or B1158 indicated?

YES - Do the relay control module input test.

NO - Do the climate control unit troubleshooting.