Air-conditioning system regulator control unit: Diagnosis/troubleshooting
NOTE:
If there is no incoming signal via CAN comfort using several control units, CAN comfort must be checked for open or short circuits. Refer to 'CHECKING INSTRUCTIONS/CAN DATA BUS
'.
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Read out fault memory in air-conditioning system regulator control unit | Go to Step 2 | Correct faults and read out fault memory again in air-conditioning system regulator control unit If OK → End If not OK Go to Step 2 |
| 2 | Continue troubleshooting, refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | → End | Go to Step 3 |
| 3 | Replace instrument cluster | → End | |