B16A4

B16A4 - Passenger Window Switch Backlighting Circuit Low






For a complete wiring diagram, refer to.

• 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.






Test Step 1 - TEST FOR INTERMITTENT CONDITION

• Turn the ignition on.

• With the scan tool, record and erase the DTCs.

• Ensure the passenger window lock out switch is on.

• Turn the park lights on.

• Wait 30 seconds.

• With the scan tool, read the DTCs.

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

Yes

• Go to Test Step 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. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 2 - WINDOW/DOOR LOCK SWITCH SHORTED







• With the scan tool, erase the DTCs.

• Turn the ignition off.

• Disconnect the Passenger Window/Door Lock Switch connector.

• Turn the ignition on.

• Ensure the park lights are on.

• Wait one minute.

• 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. Refer to => Non-DTC Based Diagnostics. Body Interior

Yes

• Go to Test Step 3

Test Step 3 - (E34) SWITCH ILLUMINATION DRIVER CIRCUIT SHORT TO GROUND







• Turn the ignition off.

• Turn the park lamps off.

• Disconnect the Passenger Door Module C5 connector.

• 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. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Go to Test Step 4

Test Step 4 - (E34) PASSENGER WINDOW EXPRESS SWITCH ILLUMINATION DRIVER CIRCUIT SHORT TO (G776) PASSENGER SWITCH RETURN







• 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 Interior

No

• Replace the Passenger Door Module.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior