Headlamp Leveling Sensor Supply Circuit Low From 2011

B2817-Headlamp Leveling Sensor Supply Circuit Low






For a complete wiring diagram, refer to.

• When Monitored: With the ignition on.

• Set Condition: The HIDT module detects a low condition on the output circuit.






Test Step 1 - CHECK FOR AN ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)

• Turn the ignition on.

• With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

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.

Test Step 2 - FRONT HEADLAMP LEVELING SENSOR

• Turn the ignition off.

• Disconnect the Front Headlamp Leveling Sensor harness connector.

• Turn the ignition on.

• With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

• Go to Test Step 3

No

• Replace the Front Headlamp Leveling Sensor. .

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

Test Step 3 - REAR HEADLAMP LEVELING SENSOR

• Turn the ignition off.

• Disconnect the Rear Headlamp Leveling Sensor harness connector.

• Turn the ignition on.

• With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

• Go to Test Step 4

No

• Replace the Rear Headlamp Leveling Sensor. .

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

Test Step 4 - (L961) HEADLAMP LEVELING SENSOR 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND







• Turn the ignition off.

• Disconnect the Headlamp Leveling Module harness connector.

• Measure the resistance between ground and the (L961) Headlamp Leveling Sensor 5 Volt Supply circuit.

Is the resistance below 10K Ohms?

Yes

• Repair the short to ground in the (L961) Headlamp Leveling Sensor 5 Volt Supply circuit.

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

No

• Go to Test Step 5

Test Step 5 - (L964) HEADLAMP LEVELING SENSOR 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND







• Measure the resistance between ground and the (L964) Headlamp Leveling Sensor 5 Volt Supply circuit.

Is the resistance below 10K Ohms?

Yes

• Repair the short to ground in the (L964) Headlamp Leveling Sensor 5 Volt Supply circuit.

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

No

• Replace the Headlamp Leveling Module. .

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