Pinpoint Test L: The Power Liftgate Module Does Not Respond To The Diagnostic Tool

L1 CHECK ISO CIRCUIT 70 (LB/WH) BETWEEN THE POWER LIFTGATE MODULE C4174a AND THE DLC C251 FOR AN OPEN
- Key in OFF position. Disconnect: Power Liftgate Module C4174a.
- Measure the resistance between the power liftgate module C4174a-1, circuit 70 (LB/WH), harness side and the DLC C251-7, circuit 70 (LB/WH), harness side.
  
  Fig 1: Measuring Resistance Between Power Liftgate Module C4174a-1, Circuit 70 (LB/WH), Harness Side And The DLC C251-7, Circuit 70 (LB/WH), Harness Side
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes

GO to L2.

No

REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. CARRY OUT the data link diagnostics test.
L2 CHECK FOR CORRECT POWER LIFTGATE MODULE OPERATION
- Disconnect all the power liftgate module connectors.
- Check for:
  - corrosion
  - push-out pins
- Connect all the power liftgate module connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes

INSTALL a new power liftgate module. Refer to BODY SYSTEM - EXTERIOR . CLEAR the DTCs. REPEAT the self-test. CARRY OUT the data link diagnostics test.

No

The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. CARRY OUT the data link diagnostics test.