B2970

DTC Troubleshooting: 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 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 6 seconds or more.

4. Do the self-diagnostic function with the HDS.

5. Check for DTCs.

Is DTC B2970 indicated?

YES -

Go to step 6.

NO -

Intermittent failure, check for a loose wire or poor connection in 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 Relay Control Module Input Test.�

NO -

Do the climate control unit troubleshooting Testing and Inspection.�