B1677

B1677 - Passenger Courtesy Lamp Control Circuit Low






For a complete wiring diagram, refer to.

• When Monitored: Whenever the module is awake and the courtesy lamps are on.

• Set Condition: When the Passenger Door Courtesy Lamp Driver circuit falls below 3.0 volts for over 1450 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.

• Turn the courtesy lamps on.

• Wait 30 seconds.

• With the scan tool, read the DTCs.

Does the scan tool display: B1677-PASSENGER COURTESY LAMP CONTROL 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 - PASSENGER DOOR COURTESY LAMP SHORTED







• With the scan tool, erase the DTCs.

• Turn the ignition off.

• Remove the inner door panel trim..

• Ensure the Passenger Door Courtesy Lamp connector is disconnected.

• Turn the ignition on.

• Ensure the courtesy lamps are on.

• Wait one minute.

• With the scan tool, read the DTCs.

• When the Door Courtesy Lamp connector is disconnected, The DTC : B1678-PASSENGER COURTESY LAMP CONTROL CIRCUIT HIGH will display as Active. This is normal.

Does the scan tool display: B1677-PASSENGER COURTESY LAMP CONTROL CIRCUIT LOW as Active?

No

• Replace the Courtesy Lamp..

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

Yes

• Go to Test Step 3

Test Step 3 - (M44) PASSENGER DOOR COURTESY LAMP DRIVER CIRCUIT SHORT TO GROUND







• Turn the ignition off.

• Turn the courtesy lamps off.

• Disconnect the Passenger Door Module C5 connector.

• Measure the resistance between Ground and the (M44) Passenger Door Courtesy Lamp Driver circuit.

Is the resistance below 10,000 ohms?

Yes

• Repair the (M44) Passenger Door Courtesy Lamp 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 - (M44) PASSENGER DOOR COURTESY LAMP DRIVER CIRCUIT SHORT TO THE (G776) PASSENGER SWITCH RETURN







• Measure the resistance between the (M44) Passenger Door Courtesy Lamp Driver circuit and the (G776) Passenger Switch Return circuit.

Is the resistance below 10,000 ohms?

Yes

• Repair the (M44) Passenger Door Courtesy Lamp Driver circuit for a short to the (G776) Passenger Switch Return circuit.

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

No

• Replace the Passenger Door Module.

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