Engine Controls - Temp Gauge Goes to Red/DTC P0117 Set

SI B 12 45 06
Engine Electrical Systems

November 2006
Technical Service

This Service Information bulletin supersedes S.I. B12 45 06 dated November 2006.

[NEW] designates changes to this revision

SUBJECT
Temperature Gauge Goes to Red and FC10 is Stored in the DME (MS43)

MODEL
[NEW] E46 M54 (MS43) all wheel drive; vehicles produced from 9/01 to 12/05

[NEW] E46 M54 (MS43); vehicles produced from 9/01 up to 03/03

[NEW] E53 M54 3.0; vehicles produced from 6/03 to 9/06.

SITUATION
While driving the temperature gauge goes to red zone for a few seconds and then returns to the normal temperature. The fault code 10 "Signal, sensor, coolant "Short circuit to negative (P0117)" is stored in the DME. The "service engine soon light" is illuminated if the fault was present for two consecutive driving cycles. There is no overheating complaint associated with this situation.

CAUSE
Fault in the DME software calibration.

PROCEDURE

1. Read the DME fault memory and display the environmental conditions of the FC 10 with DIS/GT1. The following environmental conditions are stored:
- Rotation speed in [rpm]
- Air mass in [mg/stroke]
- Intake air temperature in [Grad C]
- Engine temperature in [Grad C] and
- Operating hours in [h].

2. Compare the stored environmental values with the following thresholds:
- IF the rotation speed is between 1,551 rpm and 2,999 rpm
- OR air mass is between 130 mg/stroke and 319 mg/stroke
- OR last engine temperature between 30 degree C and 120 degree C
- THEN the DME needs to be programmed using Progman V23.0 or higher.

If the stored environmental values are outside the specified ranges please troubleshoot accordingly for a coolant temperature sensor problem.

WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.

Defect Code Refer to KSD

Labor Operation: Refer to KSD
Labor Allowance: Refer to KSD