2007 Commander XK Factory Service Manual 8 - ELECTRICAL

B1852-DRIVER WINDOW SWITCH STUCK - DDM

For a complete wiring diagram Refer to Section 8W.

Theory of Operation

This test shows graphics, circuit numbers and text for a Left Hand Drive (LHD) vehicle. Right Hand Drive (RHD) is similar.

When Monitored:
Whenever the module is awake.
Set Condition:
When the Driver Window Mux circuit is below 3.5 volts for over 30 seconds.

Possible Causes

(Q221) (LHD) MASTER SWITCH LEFT FRONT WINDOW MUX CIRCUIT SHORT TO GROUND

(Q221) (LHD) MASTER SWITCH LEFT FRONT WINDOW MUX CIRCUIT SHORT TO THE (Q994) DRIVER EXPRESS SWITCH RETURN CIRCUIT

(Q222) (RHD) MASTER SWITCH RIGHT FRONT WINDOW MUX CIRCUIT SHORT TO GROUND

(Q221) (RHD) MASTER SWITCH RIGHT FRONT WINDOW MUX CIRCUIT SHORT TO THE (Q994) DRIVER EXPRESS SWITCH RETURN CIRCUIT

WINDOW/DOOR LOCK SWITCH SHORT TO GROUND

DRIVER DOOR MODULE (DDM)

Diagnostic Test

1. TEST FOR INTERMITTENT CONDITION

Turn the ignition on.
With the scan tool, record and erase DTC's
Operate the Driver Window Switch in all positions several times.
Wait 30 seconds.
With the scan tool, read DTC's.

Does the scan tool display B1852–DRIVER WINDOW SWITCH STUCK?

Yes

Go To 2

No

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.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

2. DRIVER WINDOW SWITCH SHORTED

With the scan tool, erase DTC's.
Disconnect the Driver Window/Door Lock Switch C2 connector.
With the scan tool, read DTC's.

Does the scan tool display B1852–DRIVER WINDOW SWITCH CIRCUIT STUCK?

No

Replace the Driver Window/Door Lock Switch.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) .

Yes

Go To 3

3. (Q221) MASTER SWITCH LEFT FRONT WINDOW MUX CIRCUIT SHORT TO GROUND

Turn the ignition off.
Disconnect the Driver Door Module C2 connector.
Measure the resistance between ground and the (Q221) Master Switch Left Front Window Mux circuit.

Is the resistance below 10000.0 ohms?

Yes

Repair the (Q221) Master Switch Left Front Window Mux circuit for a short to ground.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

Yes

Go To 4

4. (Q221) MASTER SWITCH LEFT FRONT WINDOW MUX CIRCUIT SHORT TO (Q994) DRIVER EXPRESS SWITCH RETURN CIRCUIT

Measure the resistance between the (Q221) Master Switch Left Front Window Mux circuit and the (Z421) Driver Express Switch Return circuit.

Is the resistance below 10000.0 ohms?

Yes

Repair the (Q221) Master Switch Left Front Window Mux circuit for a short to the (Q994) Driver Express Switch Return circuit.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

No

Replace the Driver Door Module in accordance with service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)