B16A4

B16A4-PASSENGER WINDOW SWITCH BACKLIGHTING CIRCUIT LOW






For a complete wiring diagram refer to the wiring information Electrical Diagrams.

- 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.






1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase DTCs
3. Ensure the passenger window lock out switch is on.
4. Turn the park lights on.
5. Wait 30 seconds.
6. With the scan tool, read DTCs.

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 the BODY VERIFICATION TEST. Body Verification Test

2. WINDOW/DOOR LOCK SWITCH SHORTED






1. With the scan tool, erase DTCs.
2. Turn the ignition off.
3. Disconnect the Passenger Window/Door Lock Switch connector.
4. Ensure the passenger window lock out switch is on and the park lamps are still on.
5. Turn the ignition on.
6. With the scan tool, read DTCs.

Does the scan tool display B16A4-PASSENGER WINDOW SWITCH BACKLIGHTING CIRCUIT LOW?

No

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

Yes

- Go To 3

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






1. Turn the ignition off.
2. Turn the park lamps off.
3. Disconnect the Passenger Door Module C5 connector.
4. Measure the resistance between Ground and the (E34) Passenger Window Express Switch Illumination Driver circuit.

Is the resistance below 10,000 ohms?

Yes

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

No

- Go To 4

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






1. 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 10,000 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 the BODY VERIFICATION TEST. Body Verification Test

No

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