Engine Controls - MIL/EML Lamps ON/Fail Safe/Codes Set

SI M 12 04 02
Engine Electrical

March 2006
Technical Service

This Service Information bulletin supersedes S.I. M12 04 02 dated August 2003.

[NEW] designates changes to this revision

SUBJECT
EDK Throttle Faults on W10/W11 Engines - Diagnostic Procedure

MODEL
Cooper with W10 up to 06/2003
Cooper S with W11 up to 06/2003

SITUATION

The "Check Engine" and EML lights are illuminated; engine may go into fail-safe mode. Some of the following intermittent and "currently not present" EDK (electronic throttle) related fault codes may be stored in EMS2K fault memory:

^ P1226 - Throttle malfunction, plausibility

^ P1125 - Throttle potentiometers, range plausibility

^ P1692 - Electric throttle monitoring, plausibility

^ P1693 - Electric throttle monitoring, plausibility

CAUSE

The possible causes may include:

1. Internal failure (defective crimping) of the EDK motor.

2. Resistance fluctuation at X6390 EDK connector due to pin contamination.

3. Signal interruption at X6390 EDK connector due to faulty crimping or defective female pins.

CORRECTION

On a customer complaint basis only, follow the diagnostic and repair procedure described below.

PROCEDURE

1. Connect vehicle to DISplus/GT1 and read the fault memory

2. Remove air filter housing and adjoining rubber boot at EDK throttle. For removal instructions refer to RA 13 71 031 found in TIS. Do not remove throttle.

3. Check the EDK throttle production date printed on the black plastic housing of the throttle. If the manufacturing date is "01-05-02" (1st of May, 2002) or higher, EDK has the latest level of improvements and should not be replaced. If the production date is prior to "01-05-02", the EDK throttle has to be replaced with the improved part.

4. Replace engine electrical harness regardless of EDK production date.





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