A/C Control Head -E87-, Remove and Install
Climate Control Components In Passenger Compartment, Servicing
A/C Control Head -E87-, Removing and Installing
NOTE:
- Always check DTC memory before removing E87.
- After replacing E87, always:
- Check coding or enter new coding.
- Perform basic setting.
- Check DTC memory.
- Vehicles equipped with Nippondenso compressors must have A/C control head E87 with Pad No. index "H" and higher installed to allow for correct coding. Coding E87.
- If 22 °C (71 °F) is always displayed after switching on the ignition regardless of the last setting, check voltage supply to E87 (terminal 30) using wiring diagram.
- E87 readout can be switched over from °C to °F and vice versa by pressing the "temperature +" and "recirculating air" buttons simultaneously.
- If E87 remains in operation after switching off the ignition, test cable connection to E87 connector -D- contact -1- for short circuit to positive (connection for auxiliary heater operation) using wiring diagram.
- If both display fields do not light up with ignition switched on, check coding of -E87- and conduct electrical tests if necessary.
- For my. 1997, the illumination of the display field and the operating button is via light emitting diode (LED), and can not be replaced.
- Always refer to parts information for correct control head versions.
- Control heads with part number 8D0 820 043 should only be installed in vehicles through m.y. 1996.
- Control heads with part number 8L0 820 043 should only be installed in vehicles beginning m.y. 1997.
- A/C control head -E87- with Part No. 8D0 820 043 can only be installed in vehicles up to and including m.y. 1996.
- M.y. 1997 vehicles can only have A/C control head -E87- with the Part No. 8L0 820 043 up to and including Part No. index letter "C."
8L0 820 043B A4-A/C fully automatic DXX
Coding XXXXX WSC ZZZZZ
- For m.y. 1998 the harness connector to A/C control head -E87- has changed (connections for illumination, terminal 58, terminal 58s).
- For vehicles beginning m.y. 1998 there is only one A/C control head -E87- (Part No. 8L0 820 043 beginning with Part No. index letter "D") that can be used.
8L0 820 043D A4-A/C fully automatic DXX
Coding XXXXX WSC ZZZZZ
- If both display fields of A/C control head - E87- (Part No. 8L0 820 043 beginning with Part No. index letter "D") are not illuminated when the ignition is switched on, check the voltage supply from terminal 58d (dimmer) to A/C control head -E87- (Electrical test).
- If the buttons for A/C control head -E87- (Part No. 8L0 820 043 beginning at Part No. index letter "D") do not light up when the light is switched on, check the voltage supply from terminal 58s (illumination) to A/C control head -E87- (Electrical test).
- If an A/C control head -E87- with the Part No. 8L0 820043 beginning with Part No. index letter "D" is installed in a 1997 m.y. vehicle, the brightness in the switch cannot be changed (Electrical test).
- If an A/C control head -E87- with Part No. 8L0 820043 including Part No. index letter "C" is installed in a 1998 m.y. vehicle, the brightness in the switch cannot be changed (Electrical test).
Removing and installing (A/C control head with double display)
- Check DTC memory.
CAUTION!
- Obtain security code for anti-theft radio.
- Note customer's pre-set radio stations.
- Disconnect battery Ground (GND) strap.
Remove Radio
- Remove screws -A-.
Remove center instrument panel trim
- Remove screws -B-.
- Remove A/C control head.
- Push back connector locks and unplug electrical connectors.
- Install in reverse order of removal.
NOTE:
- After installing E87, check that shaped hose -C- of temperature sensor G56 (blower V42) is routed correctly (not kinked).
- When installing screws -B-, position the center trim mounts correctly.
- After installing E87, always confirm correct coding, perform basic setting and check DTC memory.
Removing and installing (A/C control head with single display)
Removing
CAUTION!
- Obtain security code for anti-theft radio.
- Note customer's pre-set radio stations.
- Disconnect battery Ground (GND) strap.
Remove radio or radion with navigation system
- Grip control head through radio opening and slide rearward.
NOTE:
- The control head is held in the center console with 4 clips -A-.
- Before replacing the control head, ensure correct application (e.g. with or without knockouts for switches for seat heaters)
- Press seat heater switches -C- back into control head so that latches -B- are engaged.
- Make sure that the hose for the instrument panel interior temperature sensor -G56- is not kinked or otherwise closed off.