Pinpoint Test I: The Ignition Key Can Be Turned to the OFF Position When the Selector Lever is Not in PARK

Steering Column Switches

Pinpoint Test I: The Ignition Key Can Be Turned to the OFF Position When the Selector Lever is Not in PARK

Refer to Wiring Diagram Set 37 (Fusion/Milan/MKZ, Fusion Hybrid, Milan Hybrid, MKZ Hybrid), Shift Interlock for schematic and connector information. Diagrams By Number

Normal Operation

The key removal inhibit solenoid (part of the ignition switch) receives battery voltage from Smart Junction Box (SJB) fuse 27 (20A) through circuit SBP27 (BU/RD). When the selector lever is moved out of the PARK position, the park range switch (part of the selector lever) closes and connects circuit CET22 (GY/BN) to circuit GD116 (BK/VT), providing ground to the key removal inhibit solenoid. The key removal inhibit solenoid activates and prevents the ignition lock cylinder from being turned to the OFF position and the key removed.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Ignition switch
- Selector lever


PINPOINT TEST I: THE IGNITION KEY CAN BE TURNED TO THE OFF POSITION WHEN THE SELECTOR LEVER IS NOT IN PARK

NOTICE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.

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I1 CHECK THE KEY REMOVAL INHIBIT SOLENOID CIRCUIT FOR GROUND

- Select NEUTRAL.
- Disconnect: Ignition Switch C250.
- Measure the resistance between ignition switch C250-3, circuit CET22 (GY/BN), harness side and ground.




- Is the resistance less than 5 ohms?

Yes
INSTALL a new ignition switch. REFER to Ignition Switch Ignition Switch. TEST the system for normal operation.

No
GO to I2.

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I2 CHECK THE KEY REMOVAL INHIBIT SOLENOID CIRCUIT FOR AN OPEN

- Disconnect: Floor Shifter C3233.
- Measure the resistance between ignition switch C250-3, circuit CET22 (GY/BN), harness side and floor shifter C3233-2, circuit CET22 (GY/BN), harness side.




- Is the resistance less than 5 ohms?

Yes
GO to I3.

No
REPAIR circuit CET22 (GY/BN). TEST the system for normal operation.

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I3 CHECK THE FLOOR SHIFTER GROUND CIRCUIT FOR AN OPEN

- Measure the resistance between floor shifter C3233-5, circuit GD116 (BK/VT), harness side and ground.




- Is the resistance less than 5 ohms?

Yes
INSTALL a new selector lever. REFER to Service and Repair. TEST the system for normal operation.

No
REPAIR circuit GD116 (BK/VT). TEST the system for normal operation.

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