A/T - MIL ON/Fault Code 34 Stored in Memory

GROUP 24
Automatic Transmission

24 02 01

Woodcliff Lake, NJ
April 2001
Service Engineering

SUBJECT
Trans Light Illuminated: FC 34 "Temperature Fault" Stored in the TCM

MODEL
E38, E39 with M62TU produced 09/97 - 08/00 with ASS 440Z (ZF)

SITUATION
The following situations may be encountered:

-- Customer complaint of transmission not upshifting at times and Fault Code 34 stored in TCM

-- Customer complaint of transmission downshifting on its own and Fault Code 34 stored in TCM

CAUSE
Incorrect crimp of the transmission temperature sensor connector.

CORRECTION
On a customer complaint basis, replace the transmission valve body harness (located inside the transmission case).

PROCEDURE Note:
The transmission does not have to be removed from the vehicle to perform this repair. Save and reuse the transmission fluid.

1. Check the TCM/AGS fault memory, if Fault Code 34 is stored print a diagnosis report.

2. Replace the transmission valve body wiring harness.

3. Refer to Repair Instruction 24 35 503 "Replacing wiring harness in Auto. Trans (ASS 440Z)"

4. Attach the diagnosis report to the defective valve body harness.





PARTS INFORMATION





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





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