B190E

B190E-DRIVER WINDOW SWITCH CIRCUIT LOW





For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

This test shows graphics, circuit numbers and text for a Left Hand Drive (LHD) vehicle. For a Right Hand Drive (RHD) vehicle, refer to the schematic for the different circuit numbers, cavities and names.

- When Monitored:
Continuously

- Set Condition:
When the Driver Express Switch Driver Window Mux circuit is under 4.4 volts for over 100 ms.





1. TEST FOR INTERMITTENT CONDITION
1. With the scan tool, record and erase the DTCs.
2. Operate the Driver Window Switch in both positions several times.
3. Cycle the ignition from on to off three times.
4. Turn the ignition on.
5. With the scan tool, read the active DTCs.

Does the scan tool display B190E-DRIVER WINDOW SWITCH CIRCUIT LOW?

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 the BODY VERIFICATION TEST. Body Verification Test.

2. DRIVER WINDOW/DOOR LOCK SWITCH SHORTED TO GROUND




1. With the scan tool, erase the DTCs.
2. Disconnect the Driver Window/Door Lock Switch C2 connector.
3. Turn the ignition on.
4. With the scan tool, read the active DTCs.

Does the scan tool display B190E-DRIVER WINDOW SWITCH CIRCUIT LOW?

No

- Replace the Driver Window/Door Lock Switch.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

Yes

- Go To 3

3. (Q221) DRIVER EXPRESS SWITCH DRIVER WINDOW MUX WIRE SHORT TO GROUND




1. Turn the ignition off.
2. Disconnect the Driver Door Module C2 connector.
3. Measure the resistance between ground and the (Q221) Driver Express Switch Driver Window Mux circuit in the Driver Door Module C2 connector.

Is the resistance below 10,000 ohms?

Yes

- Repair the (Q221) Driver Express Switch Driver Window Mux circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. (Q221) DRIVER EXPRESS SWITCH DRIVER WINDOW MUX WIRE SHORT TO THE (Q994) DRIVER EXPRESS SWITCH RETURN CIRCUIT




1. Measure the resistance between (Q994) Driver Express Switch Return circuit and the (Q221) Driver Express Switch Driver Window Mux circuit in the Driver Door Module C2 connector.

Is the resistance below 1,000 ohms?

Yes

- Repair the (Q221) Driver Express Switch Driver Window Mux circuit for a short to the (Q994) Driver Express Switch Return circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Driver Door Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test.