B16A4

B16A4-PASSENGER WINDOW SWITCH BACKLIGHTING CIRCUIT LOW - PDM





For a complete wiring diagram consult Diagrams/Electrical.


- When Monitored:
Whenever the module is awake, the park lamps are on and the window lock out switch is on.

- Set Condition:
When the Passenger Window Express Switch Illumination Driver circuit falls below 3.0 volts for over 25 ms. and the above conditions are met, this code will set.








Diagnostic Test


1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase DTC's
Ensure the passenger window lock out switch is on.
Turn the park lights on.
Wait 30 seconds.
With the scan tool, read DTC's.
Does the scan tool display B16A4-PASSENGER WINDOW SWITCH BACKLIGHTING 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.Body Verification Test.




2. WINDOW/DOOR LOCK SWITCH SHORTED




With the scan tool, erase DTC's.
Turn the ignition off.
Disconnect the Passenger Window/Door Lock Switch connector.
Turn the ignition on.
Operate the passenger window lock out switch several times.
With the scan tool, read DTC's.
Does the scan tool display B16A4-PASSENGER WINDOW SWITCH BACKLIGHTING CIRCUIT LOW?

No


- Replace the Window/Door Lock Switch.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.


Yes


- Go To 3




3. (E34) PASSENGER WINDOW EXPRESS SWITCH ILLUMINATION DRIVER CIRCUIT SHORT TO GROUND




Turn the ignition off.
Turn the park lamps off.
Disconnect the Passenger Door Module C2 connector.
Measure the resistance between Ground and the (E34) Passenger Window Express Switch Illumination Driver circuit.
Is the resistance below 10000.0 ohms?

Yes


- Repair the (E34) Passenger Window Express Switch Illumination Driver circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.


No


- Go To 4




4. (E34) PASSENGER WINDOW EXPRESS SWITCH ILLUMINATION DRIVER CIRCUIT SHORT TO (Q936) PASSENGER WINDOW EXPRESS SWITCH RETURN




Measure the resistance between the (E34) Passenger Window Express Switch Illumination Driver circuit and the (Q936) Passenger Window Express Switch Return circuit.
Is the resistance below 10000.0 ohms?

Yes


- Repair the (E34) Passenger Window Express Switch Illumination Driver circuit for a short to the (Q936) Passenger Window Express Switch Return circuit.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.


No


- Replace the Passenger Door Module.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.