Diagnostic Test

1) TEST FOR INTERMITTENT CONDITION
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 B18BB-WINDOW CONTROL CIRCUIT LOW?

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) .
2) TOTALLY INTEGRATED POWER MODULE (TIPM)

Fig 1: Measuring Resistance 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.

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

Is the resistance below 10.0 ohms?

No
1. Replace the Totally Integrated Power Module (TIPM) 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) .
Yes
1. Go To 3).
3) POWER WINDOW SWITCH SHORTED

Fig 2: Measuring Resistance Between Ground And Fused Ignition Switch Output Circuit At Window Switch Connector
Courtesy of DAIMLERCHRYSLER CORP.

Disconnect the Power Window Switch connector.

Measure the resistance between ground and the (F981) Fused Ignition Switch Output circuit in the Window Switch connector.

Is the resistance below 10.0 ohms?

Yes
1. Repair the (F981) Fused Ignition Switch Output circuit for a short to ground.
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 Power Window Switch.
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) .