On-Board Diagnostics (OBD)

On Board Diagnostic (OBD) From 12.01

The Climatronic control module -J255- is controlled by an internal microprocessor with On Board Diagnostic (OBD) capability. If malfunctions, short or open circuits occur on monitored components, Diagnostic Trouble Codes (DTC) are stored in memory.

OBD program functions on vehicles from 12.01 production must be performed using the VAS 5051/5052 Vehicle Diagnostic Testing and Information System in mode "Guided Fault Finding".

Components, checking and adjusting with VAS 5051/5052 tester
- Connect VAS 5051/5052 to vehicle Data Link Connector (DLC). select mode "Guided Fault Finding"
- Enter appropriate model, equipment and model year information and press ">" to confirm.
After all control modules have been registered and DTC memories checked,
- Press "Go to"
- Select "Function/Component Selection"
- Select "Body"
- Select "Heating, ventilation, air conditioning"
- Select "Systems capable of self-diagnosis"
- Select "Climatronic"
- Select "Functions"
Review displayed listing, choose and press ">" to confirm.
- "Basic settings",
- "Coding Control module for Climatronic
- "Check cooling performance".
- Follow tester prompts.