740 MCC Model Year 1988-90
INSTALLATION OF CONTROL MODULE AND CABLES.740 MCC model year 1988-90
A1
Preparations
- Clean evaporator according to: Service Bulletin 8-87-948.
- Make note of radio code if anti-theft coded radio installed.
Remove:
- Negative battery lead.
- Sound insulation on passenger side.
- Glove compartment.
- Cowl on passenger side.
- Ashtray.
- Cigar lighter.
- Storage compartment.
- Detach, pull out and turn central electronics module. Refer to Service Manual:
Section 3(35-39), Lighting, instrumentation and other electrical equipment (see Group 37)
700/900 1982-
TP 3502201
Section 8 (82-86, 88), Interior. exterior,
700/900 1982-
TP 8202201
CABLE CONNECTIONS
A2
Installing new relay on cable harness
- Select the cable harness (P/N 9148755) Supplied with kit.
- Attach the relay in the kit to the 5-pin connector which is attached to the same end of the cable harness as the black-red cable.
A3
Attaching new cable harness with relay
Attach relay and cable harness above the heater vacuum tank using a cable tie.
- Route the red-black cable inside the center console right side panel to the central electronics module.
- Connect the cable to fuse 6 and terminal 4 on the central electronics module (CEM).
Use cable tie to attach to existing cable harness.
A4
Remove existing connector from existing cable harness
- Detach the 5-pin connector from relay for blower (relay 131 in the Service Manual). Refer to the Service Manual:
Section 3 (39) Wiring diagrams
740 1990
TP 31571/1
A5
Cable terminal, opening
- Detach the cables carefully from the connector's receptacle housing using tool 9814229-2, from repair kit 9814235
Refer to the Service Manual:
Section 3(37). Wiring repairs and replacement of cable terminals,
850. 900
TP3701201
A6
Installation of 5 housing receptacles
- Straighten the locking tongues carefully and attach the 5 white housing receptacles from the kit.
A7
Connecting the new cable harness to the 5 housing receptacles
- Attach housing receptacles to the cable harness tab terminals according to cables' color coding (color-to-color match)
A8
Connecting the new cable harness to the blower relay
- Connect the cable harness 5-pin connector to the blower relay. Refer to the Service Manual:
Section 3 (39) Wiring diagrams
740 1990
TP 31571/1
A9
Connection of cable to ground plate
- Connect the black-white cable included in the new cable harness to the ground plate on the right side of the cowl.
The ground plate is located behind the fuel control module.
A10
Route cables to engine compartment
- Route the green cables on the cable harness to the engine compartment through the vacant hole in the grommet under the brace to the suspension strut (tower).
1988 and 1989 models
- Connect the flat connectors
1990 cars (shown here):
- Connect the round connectors.
Connect all unconnected connectors up to each other.
A11
Location of opening in cable sheath
The cable sheath is cut to drain off condensation.
- The cut conduit section should be placed at the lowest point in the cable routing.
- Use butyl tape to seal the grommet
- Use existing clamps to clamp up the cables to firewall.
Installation of control module from kit.
A12
Connection and mounting of control module
- Connect cable harness connector to control module connector.
- Apply three butyl tape sections on the control module. Install control module on dashboard side section with butyl tape.
A13
Fastening cable harness
- Arrange cable harness as shown.
- Fasten the new cable harness using strip clamps in the existing cable harness so that the harness does not contact the shutter shaft on the heater.
Function verification and information
A14
Check airing cycle is working
- Connect battery lead and start car.
- Turn A/C system on so the compressor starts.
The A/C system starts if the temperature exceeds approx. 7°C (45 °F).
- Make up a cable approx. 2 meters (6.5 ft) in length to connect battery positive terminal to the connector on the control module. Connect to green cable, connector terminal 6, for at least 30 seconds while compressor is working.
- Turn off engine.
Airing cycle should begin after approx. 10 seconds and continue for approx. 1 second.
- Remove cable between connector and battery.
- Replace all parts removed.
- Enter radio code if anti-theft coded radio installed.
A15
Information to Car Owner
- Carry out operations at the end of this service bulletin.