Headlamp Leveling Sensor Supply Circuit Low Through 2010

B2817-Headlamp Leveling Sensor Supply Circuit Low






For a complete wiring diagram, refer to.

• When Monitored: With the Headlamps on.

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






Test Step 1 - CHECK FOR ACTIVE DTC

• Turn the ignition on.

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

• Wait 30 seconds.

• With the scan tool, read HIDT Module DTCs.

Does the scan tool display: B2817-HEADLAMP LEVELING SENSOR SUPPLY CIRCUIT LOW?

Yes

• Go to Test Step 2

No

• The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.

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

Test Step 2 - HEADLAMP LEVELING SWITCH

• Turn the ignition off.

• Disconnect Headlamp Leveling Switch.

• Turn the ignition on.

• With the scan tool, read HIDT Module DTCs.

Does the scan tool display this DTC as active?

Yes

• Go to Test Step 3

No

• Replace Headlamp Leveling Switch in accordance with the Service Information.

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

Test Step 3 - (L133) HEADLAMP ADJUST SIGNAL OUTPUT CIRCUIT OPEN







• Turn the ignition off.

• Disconnect the HIDT Module harness connector.

• Measure the resistance between the (L133) Headlamp Adjust Signal Output circuit and the (Z905) Ground circuit.

Is the resistance below 10K Ohms?

Yes

• Repair the (L133) Headlamp Adjust Signal Output circuit for an open condition.

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

No

• Go to Test Step 4

Test Step 4 - (L133) HEADLAMP ADJUST SIGNAL OUTPUT CIRCUIT SHORTED TO GROUND







• Measure the resistance between ground and the (L133) Headlamp Adjust Signal Output circuit.

Is the resistance below 10K Ohms?

Yes

• Repair the (L133) Headlamp Adjust Signal Output circuit for a short to ground.

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

No

• Replace the Headlamp Leveling Module (HIDT). .

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