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

A/C control head -E87-, removing and installing


NOTE:
- Always check DTC memory before removing -E87-.
- Changes to model year 2000 > vehicles

After replacing -E87-, always:
- Check coding or enter new coding.
- Perform basic setting.
- Re-check DTC memory.
- If a newly installed A/C control head -E87- flashes after ignition is switched on, code -E87-, for more description refer to appropriate system.
- If 22 °C (71 °F) is always displayed after switching ignition off regardless of the last setting, check voltage supply to -E87- (terminal 30) using wiring diagram.
- The display of A/C control head -E87- (and exterior temperature display in instrument cluster) for version up to index "K" can be changed from °C to °F and vise versa by pressing the "Temperature left" (driver-side) with "circulating air button" pressed. The unit of display (°C or °F) for A/C control head -E87- as of index "M" is determined via the adaptation of the control module in instrument cluster (and transmitted to -E87- via the databus-system).


NOTE:
- -E87- can be operated for a certain time (up to about 30 minutes) after switching off the ignition by pressing the "Rest" button (residual heating). Operating time depends on charge condition of battery maximum about 10 minutes.
- For vehicles with Nippondenso compressor only A/C control heads beginning with Index "C" are to be or will be installed.
- If -E87- remains in operation after switching off the ignition, test cable connection to connector E terminal 7 for short circuit to positive (connection for auxiliary heating mode not foreseen for USA/Canada) using wiring diagram.
- Remove center part of instrument panel






- Press tabs to unlock and disconnect connectors (arrow).






- Remove 4 screws -A-.
- If it is not possible to remove the A/C control head from center of instrument panel after removing the screws; remove wood trim from center part of dash.

Changes to model year 2000 > vehicles:

- When replacing A/C control head note allocation See Page 01-7.
- Illumination of display field and operating buttons occurs via A/C control head with pad number beginning with index letter "M" through light emitting diodes (LEDs not replaceable).
- During malfunction test of temperature sensor -G56- intake screen of trim should not be closed.

For A/C control head with part numbers beginning with Index "M"

- Remove instrument cluster air outlet, center.






- Remove trim -A- for center instrument cluster.
- Remove radio or radio navigation system.


NOTE:
- Different versions of trim -A- and A/C control head for vehicles with radio and with radio navigation system (or radio with greater service area).
- Different versions of A/C control head for vehicles with or without heated seats.






- Unscrew 4 bolts -A-.






- Press connector lock (arrow) back and remove connector.






- Disconnect connector for rear window defroster and remove.






- Remove switch for heated seat, press tabs - A- back and remove switch -B- to the back out of A/C control head -E87-.
- Illumination of display field and operating buttons occurs via A/C control head with part number beginning with index letter "M" through light emitting diodes (LEDs not replaceable).
- Different versions of -E87- are available (depending on the vehicle equipment e.g. with or without opening for the heated seat switch) as replacement parts.
- Installing

Installation is in reverse order of removal.