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 Switch Illumination Driver circuit falls below 3.0 volts for over 1350 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 the 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 the DTCs.

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

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. WINDOW/DOOR LOCK SWITCH SHORTED




1. With the scan tool, erase the DTCs.
2. Turn the ignition off.
3. Disconnect the Passenger Window/Door Lock Switch connector.
4. Turn the ignition on.
5. Ensure the park lights are on.
6. Wait one minute.
7. With the scan tool, read the 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) 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) Switch Illumination Driver circuit.

Is the resistance below 10,000 ohms?

Yes

- Repair the (E34) 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 (G776) PASSENGER SWITCH RETURN




1. Measure the resistance between the (E34) Switch Illumination Driver circuit and the (G776) Passenger Switch Return circuit.

Is the resistance below 10,000 ohms?

Yes

- Repair the (E34) Switch Illumination Driver circuit for a short to the (G776) Passenger 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.