B161A

B161A - Courtesy/Dome Lamp Control Circuit

For a complete wiring diagram, refer to.

• When Monitored: Continuously.

• Set Condition: When the instrument cluster detects a short to battery on the control circuit.






Test Step 1 - Test For Intermittent Condition

• Turn the ignition ON.

• Clear all instrument cluster DTCs.

• Turn the courtesy lamps ON.

• With the scan tool, read DTCs.

Does the scan tool display B161A - Courtesy/Dome Lamp Control Circuit?

Yes

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

Test Step 2 - Test the Courtesy Lamps Driver Circuit for a Short to Ground

• Turn the ignition OFF.

• Disconnect the instrument cluster harness connector.

• Measure the resistance between the courtesy lamp driver circuit and ground.

Is the resistance less than 5.0 ohms?

Yes

• Repair the 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 3.

Test Step 3 - Test the Courtesy Lamps Driver Circuit for an Open

• Turn the ignition ON.

• Measure the voltage of the courtesy lamp driver circuit.

Is the voltage less than 10.0 volts?

Yes

• Repair the courtesy lamp driver circuit for an open.

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

No

• Replace the instrument cluster.

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