Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnostic Test
- TEST FOR INTERMITTENT CONDITION
With 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 .
- 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 .
Yes
- Go To 3.
- (Q221) DRIVER EXPRESS SWITCH DRIVER WINDOW MUX WIRE SHORT TO GROUND
Courtesy of CHRYSLER LLC
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 .
No
- Go To 4.
- (Q221) DRIVER EXPRESS SWITCH DRIVER WINDOW MUX WIRE SHORT TO THE (Q994) DRIVER EXPRESS SWITCH RETURN CIRCUIT Fig 3: Measuring Resistance Between (Q994) Driver Express Switch Return Circuit And (Q221) Driver Express Switch Driver Window MUX Circuit In Driver Door Module C2 Connector
Courtesy of CHRYSLER LLC
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 .
No
- Replace the Driver Door Module in accordance with service information.
- Perform BODY VERIFICATION TEST .
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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