Code control module
NOTE:
- Control modules can only be coded using testers in which a workshop number has been entered.
- With the ignition switched off, connect Diagnostic Operation System VAS 5051A using, for example, Diagnostic Cable - 3 Meter VAS 5051/5A and K-Lead Adapter Vas6017B VAS 6017B (or K-Lead Adapter VAS 6017A) to the 16-pin diagnostic socket in the vehicle → Diagnostic Operation System VAS 5051A, connecting and selecting functions .
- Switch ignition on.
- Use address word "08" to select A/C heater electronics → Diagnostic Operation System VAS 5051A, connecting and selecting functions .
Requirements:
- DTC memory checked → Diagnostic Trouble Code (DTC) Memory, checking (function 02) , all displayed faults eliminated and DTC memory erased
- Air conditioner switched on ("Auto" mode).
Indicated on display of Diagnostic Operation System VAS 5051A :
- Select function "07 - Coding control module".
Indicated on display of Diagnostic Operation System VAS 5051A :
Fig 2: Identifying Prompt For Entering Code Appears In Display Zone, Input Keypad Appears In Display Zone & Fourth/Fifth Line Of Display Zone
- Prompt for entering code appears in display zone - 1 -.
- Input keypad appears in display zone - 2 -.
- Fourth line of display zone - 3 - indicates currently valid code, with previous code in brackets.
- Fifth line of display zone - 3 - indicates workshop code entered in Diagnostic Operation System VAS 5051A.
- Code the operating and display module, Climatronic Control Module J255 in line with the optional extras installed and the vehicle model, coding table → Coding table .
- Use keypad - 2 - to enter required code in line with coding table.
- Confirm entry by touching Q key in display zone - 2 -.
The following appears on the display of the Diagnostic Operation System VAS 5051A after a brief delay.
Fig 3: Identifying Display Field Indicates "Vehicle System Coding Performed" & Indicates Control Unit Identification With New Code And Old Code In Brackets
- Display field - 1 - indicates "Vehicle system coding performed".
- Display field - 2 - indicates control unit identification with new code and old code in brackets.
NOTE:
- Touch ← key to return to selection program.
- If an incorrect code is entered, the DTC message "Function unknown or cannot be implemented at present" is displayed and the old code remains stored.
- At the factory (as-delivered condition for replacement part), the coding for the operating and display module, Climatronic Control Module J255 is currently "00000".
- The coding of the vehicle version sets the operating and display module, Climatronic Control Module J255 to the different models:
- The "basic configuration" is applicable to the Saloon, Avant and Coupe.
- On the Cabrio, the Heated Rear Window function is configured differently, the control characteristic curve accordingly modified and, with the convertible top open, control action is implemented via the vent temperature sensors (Left Vent Temperature Sensor G150, Right Vent Temperature Sensor G151 etc.).
- If the operating and display module, Climatronic Control Module J255 is coded for a vehicle with Heated Windshield Z2 as optional extra, diagnosis and the Heated Windshield activation function are enabled.
- If Climatronic Control Module J255 has been coded as a vehicle equipped with "sunroof with solar cells" (Solar Cells C20), the following adjustments are performed at this time on the heating and A/C unit after ignition is switched off:
- Both Left Temperature Flap Motor V158 and Right Temperature Flap Motor V159 are set to the position "cold".
- Central Air Flap Motor V70 is set to the "air to instrument panel vents" position and the defroster flap is closed via Defroster Flap Motor V107 (air into footwells).
- Fresh air flap is opened (Air Flow Flap Motor V71) and recirculating air flap is closed (Recirculation Flap Motor V113).