B190E-DRIVER WINDOW SWITCH CIRCUIT LOW-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. 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.
| Possible Causes |
| (Q221) (LHD) MASTER SWITCH LEFT FRONT WINDOW MUX CIRCUIT SHORT TO GROUND |
| (Q222) (RHD) MASTER SWITCH RIGHT FRONT WINDOW MUX CIRCUIT SHORT TO GROUND |
| (Q221) (LHD) MASTER SWITCH LEFT FRONT WINDOW MUX CIRCUIT SHORTED TO THE (Q994) DRIVER EXPRESS SWITCH RETURN CIRCUIT |
| (Q222) (RHD) MASTER SWITCH RIGHT FRONT WINDOW MUX CIRCUIT SHORTED TO THE (Q994) DRIVER EXPRESS SWITCH RETURN CIRCUIT |
| DRIVER WINDOW/DOOR LOCK SWITCH |
| DRIVER DOOR MODULE |
Diagnostic Test
1. TEST FOR INTERMITTENT CONDITIONWith the scan tool, record and erase DTC's
Operate the Driver Window Switch in both positions several times.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read DTC's.
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 BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
2. DRIVER WINDOW/DOOR LOCK SWITCH SHORTED TO GROUND
With the scan tool, erase DTC's.
Disconnect the Driver Window/Door Lock Switch C2 connector.
Turn the ignition on.
With the scan tool, read DTC's.
Does the scan tool display B190E–DRIVER WINDOW SWITCH CIRCUIT LOW?
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) DRIVER EXPRESS SWITCH DRIVER WINDOW MUX WIRE SHORT TO GROUND
Turn the ignition off.
Disconnect the Driver Door Module C2 connector.
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 10000.0 ohms?
Yes
- Repair the (Q221) Driver Express Switch Driver Window Mux circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To 4
4. (Q221) DRIVER EXPRESS SWITCH DRIVER WINDOW MUX WIRE SHORT TO THE (Q994) DRIVER EXPRESS SWITCH RETURN CIRCUIT
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 1000.0 ohms?
Yes
- Repair the (Q221) Driver Express Switch Driver 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)