Esp DTC C1140 (DTB; MB-NET/489)

ESP DTC C1140

TECHNICAL SERVICE BULLETIN

SUBJECT

ESP DTC C1140: Splines on upper and lower steering column may not be correctly aligned. HHT value of steering angle while holding the steering wheel in the straight ahead position should be 0 degrees +/- 6 degrees. Perform listed procedure.

BODY:- 163

SERVICE INFORMATION

Complaint: ESP malfunction indicator light illuminated on instrument cluster and fault code C1140 present.

Cause: Splines on upper and lower steering column may not be correctly aligned. As an indication of improper alignment, monitor the HHT value of steering angle while holding the steering wheel in the straight ahead position. The value should be 0 degrees +/- 6 degrees.

Remedy: In cases of complaint, check for proper alignment of upper and lower steering column sections. Perform the following work if the shafts are found to be misaligned. This work MUST be performed in the order specified below.

1. Correct alignment of upper and lower steering column sections. Refer to WIS document AR46.10-P-0400GH "removing and installing jacket tube."
2. Position vehicle on alignment rack.
3. Verify with HHT that vehicle steering angle sensor is reading 0 degrees +/- 6 degrees with wheels in straight ahead position.
4. Lock steering wheel; reset vehicle toe to specifications.
5. Start vehicle; initialize steering angle sensor (N49) by turning steering wheel lock to lock.
6. Erase any fault codes in ESP control unit (N47) with HHT. Fault code C1140 may be stored as a hard code and possibly not erasable at this time.
7. Drive vehicle approximately 18 miles (highway conditions preferable).
8. Bring vehicle to a stop; cycle key to extinguish ESP MIL if illuminated.
9. Check for and erase any fault codes remaining in ESP control module.

In case of warranty, please use Damage Code 46211 42