Steering - Power Steering Pump Cooling Fan Inoperative
SI M32 01 04Steering and Wheel Alignment
September 2004
Technical Service
This Service Information Bulletin supersedes S.I. M 32 01 04 dated June 2004.
[NEW] designates changes to this revision
SUBJECT
Power Steering Pump Cooling Fan Activation
MODEL
[NEW] Vehicles produced from the start of series production through December 2002.
R50 Cooper
R53 Cooper S
SITUATION
A customer may complain of engine overheats with coolant temperature gauge displayed in red. In rare situations, power steering assist may be reduced. This situation can occur under extreme conditions when the vehicle is operated for extended periods at high ambient temperatures.
CAUSE
Power steering pump cooling function has the same circuit protection with auxiliary engine cooling fan (fuse 05). Internal corrosion or external blockage of the power steering pump cooling fan may cause the fuse (FOS) to blow, causing an inoperable auxiliary engine cooling fan.
CORRECTION
In case of a customer complaint only, the wiring for the power steering cooling fan can be modified to separate it from the auxiliary engine cooling fan circuit protection.
PROCEDURE
Preliminary work:
^ Disconnect the negative battery cable.
^ Pull off the rubber seals above the passenger's and driver's side air intake ducts.
Retrofitting the relay carrier:
Loosen nut (1) and lift the coolant
expansion tank (2) out of its bracket.
[NEW] On the outside of the passengers side air intake duct (1) measure vertically down from the top edge of the cowl panel.
Fix and mark dimension A = 65 mm.
^ Cut a rectangular hole (1) in the wall of the passenger side air intake duct at the point marked.
A = 8 mm / B = 10 mm
Note:
Drill a hole using a 5 mm drill bit. Then use a square file to obtain proper dimensions.
Secure the relay carrier (1) in the square hole on the inside of the shaft.
Secure connector cable (1) from relay carrier (2) with a cable strap (4) to the lowermost brake line (3). Guide connector cable (1) from relay carrier (2) behind the trim on the bulkhead to the driver's side of the vehicle.
Note:
If necessary, use a wire coat hanger to help you guide the connecting cable.
For R50 Cooper:
Remove the covers of the battery housing and power distributor. Unscrew bolt (1) on the battery positive cable.
Release and separate connector (2). Unscrew bolts (3) and tilt the power distributor approximately 90° toward the bulkhead.
Unscrew bolt (1).
Pull trim panel (2) up and out.
Note on installation:
Make sure the trim panel (2) is correctly routed at the side.
Lift the upper section of the rubber bushing (1).
Route connecting cable (2) parallel over the body wiring harness (3) and close the rubber bushing (1) again.
For better accessibility, it may be necessary to release connector (1), separate it and place it to one side. Release and separate connector (2).
white connector (1).
Insert the MQS contact (MQS = Micro Quadrolock System) on the connecting cable into chamber 2 until it locks. Close the secondary lock on the connector again.
Guide the connecting cable (1) under the power distributor on the body wiring harness (2) and forward to the connector (3).
Note:
Body wiring harness (2) is routed between the transmission carrier and the suspension strut dome.
Pull off and separate connector (3) from bracket (4).
Open the secondary lock on the 18-pin socket housing as far as the first detent (1).
Press the female pin contact (system D1.5) out of pin location 11 with special tool 61 1 131.
Press the female pin contact on the connecting cable into pin location 11 until it locks.
Close the secondary lock again.
After reassembling connector (1), separate the exposed pin contact (2) from the body wiring harness and insulate the cable end. Reassemble the vehicle.
For R53 Cooper S:
Hold wiring harness (1) to the control module.
Pull rubber bushing (2) up until the aperture forms an oval. Pull connecting cable (3) through and guide it down behind the control module box.
Open the power distributor. Unscrew bolt (1) and disconnect the battery positive cable. Release and separate connector (2). Unscrew bolt (3) and turn the power distributor through 90° towards the bulkhead.
For better accessibility, it may be necessary to release connector (1), separate it and place it to one side. Unlock and separate the white, 4-pin plug connector (2).
Open the secondary lock on the 4-pin white connector (1).
Insert the MQS contact (MQS = Micro Quadrolock System) on the connecting cable into chamber 2 until it locks. Close the secondary lock on the connector again.
Guide the connecting cable (1) under the power distributor on the body wiring harness (2) and forwards to connector (3).
Note:
Body wiring harness (2) is routed between the transmission carrier and the suspension strut dome.
Pull off and separate connector (3) from bracket (4).
Open the secondary lock on the 10-pin socket housing.
Press the female pin contact (system D1.5) out of chamber 10 with special tool 61 1 131.
Press the female pin contact on the connecting cable into chamber 10 until it locks.
Close the secondary lock again.
After reassembling connector (1), separate the exposed annular contact (2) from the body wiring harness and insulate the cable end. Reassemble the vehicle.
PARTS INFORMATION
WARRANTY INFORMATION
Covered under the terms of the MINI New Vehicle Limited Warranty.