Headlamp Leveling Motor Control Circuit High From 2011

B1789-Headlamp Leveling Motor Control Circuit High






For a complete wiring diagram, refer to.

• When Monitored: With the ignition on and the headlamps activated.

• Set Condition: When the Totally Integrated Power Module (TIPM) detects an open circuit or a short to voltage.






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

• Turn the ignition on.

• With the scan tool read DTC's.

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.

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

Test Step 2 - (L13) HEADLAMP ADJUST SWITCH CIRCUIT SHORTED TO VOLTAGE







• Disconnect the TIPM C4 harness connector.

• Turn the ignition on.

• Measure for voltage on the (L13) Headlamp Adjust Switch circuit.

Is the voltage above 10.0 volts?

Yes

• Repair the (L13) Headlamp Adjust Switch circuit for a short to voltage.

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

No

• Go to Test Step 3

Test Step 3 - (L13) HEADLAMP ADJUST SWITCH CIRCUIT OPEN







• Turn the ignition off.

• Disconnect the Right and Left Headlamp Assembly harness connectors.

• Measure the resistance of the (L13) Headlamp Adjust Switch circuit.

Is the resistance below 10.0 Ohms?

Yes

• Replace the Totally Integrated Power Module (TIPM). .

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

No

• Repair the (L13) Headlamp Adjust Switch circuit for an open.

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