Ignition Timing Angle - Diagnostic Readout

Group 12
Engine - Electrical



Bulletin Number
12 01 91 (3202)



Woodcliff Lake, NJ
May 1991
Service Engineering



SUBJECT:
Engine Test-Ignition Timing Angle Diagnostic Readout

MODEL:
M3

Situation:
When performing an engine test, the ignition timing angle cannot be read out on some vehicles. However, there is no effect on the proper functioning of the engine management system.

Cause:
The three wires in the female plug housing (connector C152) for the TDC position sensor were incorrectly inserted when the wiring harnesses were produced.

The three-pole plug connection is located on the firewall under the plastic cover and can be identified by a red plastic wire tie.

Correction:
Peel back rubber cap from female plug and cut the three wires as close to the plug housing as possible. Using the appropriate female connectors and a new plug housing (P/N 12 52 1 706 068), insert wires as follows:

Chamber 1: yellow wire
Chamber 2: black wire
Chamber 3: shielded wire

Warranty
Status:
Covered under the terms of the applicable BMW New Car Limited Warranty.

Defect code: 12 11 27 79 00

Labor operation: 00 50 838

Labor allowance: 4 FRUs

Any questions regarding warranty coverage should be discussed with your District Service Manager.