Diagnostic Test

Turn the ignition on.

With the scan tool, record and erase DTC's

Try to operate the Power Windows up and down several times.

Wait 30 seconds.

With the scan tool, read DTC's.

Does the scan tool display B18BC-WINDOW CONTROL CIRCUIT HIGH? 

Yes 

1. Go To  2).

No 

1. The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE - BODY VERIFICATION TEST - VER 1) , also see (STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING) .

Fig 1: Measuring Voltage Between Ground And Fused Ignition Switch Output Circuit At TIPM C7 Connector

Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Totally Integrated Power Module C7 connector.

Turn the ignition on.

Measure the voltage between ground and the (F981) Fused Ignition Switch Output circuit in the TIPM C7 connector.

Is there any voltage present? 

Yes  

1. Repair the (F981) Fused Ignition Switch Output circuit for a short to voltage.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE - BODY VERIFICATION TEST - VER 1) , also see (STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING) .

No 

1. Replace the Totally Integrated Power Module in accordance with service information.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE - BODY VERIFICATION TEST - VER 1) , also see (STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING) .