Control Assembly: Service and Repair

A/C Control Head -E87-, Removing And Installing

NOTE:
- Always check Diagnostic Trouble Code (DTC) memory before removing -E87-.
- After replacing -E87-, always: 1) Check coding or enter new coding 2) Perform basic setting 3) Check DTC memory.
- -E87- temperature display can be switched from degree C to degree F and back by pressing and holding the "recirculated air" button and at the same time turning the temperature control knob towards "temperature +".
- If -E87- remains on after the ignition has been switched off, check for short circuit to B+ in the wiring to terminal 1 on connector D connection for auxiliary heater) according to wiring diagram.
- If a newly installed A/C control head display flashes for about 2 minutes when the ignition is switched on, code the A/C control head (Scan Tool function 07) and perform basic setting (Scan Tool function 04).
- If -E87- display does not light up when ignition is switched on, check the voltage supply from terminal 58d (instrument illumination dimmer) to -E87- according to wiring diagram, and also, Electrical testing.
- If -E87- control buttons do not light up when the vehicle lights are switched on, check voltage supply from terminal 58s (switch illumination) to -E87- according to wiring diagram, and also, Electrical testing.
- -E87- display and control buttons are illuminated by LEDs and cannot be replaced separately.
- A/C Control Head -E87- with part number suffix "A" are installed as a running change during m.y. 2000. -E87- with suffix "A" differs from non suffix version as follows:
- Allocation of ignition key is recognized (as transmitted from the instrument cluster) and displayed in Read Measuring Value Block "009"
- The last 4 compressor cut-out conditions that are valid for longer than 20 seconds are saved in memory and displayed in Read Measuring Value Block 011.

Removing
- Remove radio.
- Remove two grips from center console.







- Remove ashtray and trim -B- for instrument panel center section.

NOTE: When re-installing trim -B-, note proper positioning of spring clips -C-.

- Remove screws -A-.
- Remove A/C control head -E87-.







- Press release tabs -arrow- and disconnect electrical connections.
- Installation is in reverse order of removal.