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Fault Code 34




Fault Code 34

Air-conditioning CAN Bus off

Diagnostic Conditions:
- Ignition on

Possible cause of fault:
- Short circuit between the two CAN leads (CAN-high and CAN-low)
- Short circuit between CAN-high (Comfort) and ground
- Short circuit between CAN-low (Comfort) and voltage
- A faulty control module connected to CAN comfort bus

NOTE:
- The CAN Comfort bus is connected to the following control modules:
- Air conditioning
- Instrument cluster
- During the troubleshooting, the plugs on the instrument cluster are re-attached in Step 4 while the plugs on the air-conditioning system control module remain removed. Due to the system, this causes the fault code "9115 air-conditioning control module" to be entered in addition into the fault memory of the instrument cluster.

Affected Terminals:
Plug B, terminals 1 and 2

Diagnosis/troubleshooting

Work Instruction 1 - 6:




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