Page 1 of 3
SI B 12 10 02 August 2003
Engine Electrical Service Engineering
This Service Information bulletin supersedes S.I. B12 10 02 dated January 2003.
designates changes to this revision
SUBJECT
EDK Throttle Faults - Diagnostic Procedure
MODEL
E36/7: Z3 roadster 2.5/3.0; coupe 3.0 with M54
E46: 325i, 330i with M54 up to 06/2003
E39: 525i, 530i with M54 up to 06/2003
E53: X5 3.0 with M54 up to 06/2003
E85: Z4 with M54 up to 06/2003
E46: 325i with M56 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 related fault codes may be stored in DME fault
memory:
On M54 (MS43) equipped vehicles:
z (112) 70 hex – Signal throttle sensor, potentiometer 1
z (113) 71 hex – Signal throttle sensor, potentiometer 2
z (115) 73 hex – Throttle range adaptation check
z (118) 76 hex – Plausibility, signal pot 1
z (119) 77 hex – Plausibility, signal pot 2
z (135) 87 hex – Limp home adaptation, plausibility
z (160) A0 hex – Throttle position controller, plausibility pot 1
z (161) A1 hex – Throttle position controller, plausibility pot 2
http://www.bmwtis.net/tiscode/cgi-bin/omcgi.exe?sie_path=/tsb/bulletins/htm_store/4818.... 1/22/2006
Page 2 of 3
z On M56 (MS45.1), and M54 with MS45.0/MS45.1 equipped vehicles (Z4 and E46 from
03/03):
z 28B3 – Throttle adaptation, lower mechanical stop not adapted
z 2796 – EDK adaptation values incorrect
z 2734 – Signal throttle sensor, potentiometer 1
z 2735 - Signal throttle sensor, potentiometer 2
z 27A5 – EDK new adaptation values required
CAUSE
The possible causes may include:
1. Internal failure (defective crimping) of the EDK throttle 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 and read the fault memory
2. Remove air filter housing and rubber boot between air flow meter and EDK throttle. For removal
instruction refer to RA 13 54 250 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 the engine electrical harness regardless of EDK production date.
PARTS INFORMATION
Part Number Description Qt.
13 54 7 502 444 EDK Throttle M54B25 1
13 54 7 502 445 EDK Throttle M54B30 1
12 51 7 506 791 E46 M54 Engine electrical harness up to 09/01 1
12 51 7 513 554 E46 M54 Engine electrical harness from 09/01 up to 3/03 1
12 51 7 528 597 E46 M54 Engine electrical harness from 03/03 1
http://www.bmwtis.net/tiscode/cgi-bin/omcgi.exe?sie_path=/tsb/bulletins/htm_store/4818.... 1/22/2006
Page 3 of 3
12 51 7 528 594 E46 M56 Engine electrical harness from 09/02 1
12 51 7 503 611 E53 Engine electrical harness up to 10/01 1
12 51 7 513 548 E53 Engine electrical harness from 10/01 1
12 51 7 503 625 Z3 w/automatic trans; Engine electrical harness up to 10/01 1
12 51 7 513 545 Z3 w/automatic trans; Engine electrical harness from 10/01 1
12 51 7 503 626 Z3 w/manual trans; Engine electrical harness up to 10/01 1
12 51 7 513 557 Z3 w/manual trans; Engine electrical harness from10/01 1
12 51 7 503 588 E39 Engine electrical harness up to 09/01 1
12 51 7 513 551 E39 Engine electrical harness from 09/01 1
12 51 7 524 106 E85, Z4 Engine electrical harness 1
[ Copyright © 2003 BMW of North America, LLC ]
http://www.bmwtis.net/tiscode/cgi-bin/omcgi.exe?sie_path=/tsb/bulletins/htm_store/4818.... 1/22/2006
