Antitheft System - Engine No Start Condition

Date: February 7, 2005

Order No.: T-B-80.57/32

Supersedes:

Group: 80

SUBJECT:
Model 163.154/157/172/174/175
Model Year 2000 to 2005

Engine Will Not Start and Fault Message "Start Error" Appears in Instrument Cluster

If you receive customer reports in the above model vehicles of the engine not starting and the message "Start Error" appearing in the instrument cluster, the drive authorization module may need to be replaced.

The drive authorization module (FBM) listed in the Parts Information section below now contains modified software to correct this condition.

Note:
This occurs when circuit 15 is truncated after the engine control unit sends a drive authorization system inquiry to the drive authorization module. If circuit 15 is switched off during this inquiry or is interrupted before the drive authorization module can respond, the same variable code is again used for the next circuit 15 cycle, as the drive authorization module has saved the previous inquiry. This results in the engine not starting for this key cycle.

To resolve, remove the old FBM control unit as per WIS instruction AR54.21-P-1300GH and replace FBM control unit with part number listed in the parts information section below.

Note:
Step 6 of AR54.21-P-1300GH checks whether the vehicle can be started with all keys. Ensure that all keys are available prior to beginning this procedure.





Parts Information

Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair.





In Case of Warranty