Pinpoint Test I: The Ignition Key Can Be Turned To The Off Position When The Selector Lever Is Not In Park

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

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

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.
  
  Fig 1: Measuring Resistance Between Ignition Switch C250-3 & Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?

Yes: INSTALL a new ignition switch. REFER to Removal and Installation . TEST the system for normal operation.
No: GO to I2.

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.
  
  Fig 2: Measuring Circuit CET22
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?

Yes: GO to I3.
No: REPAIR circuit CET22 (GY/BN). TEST the system for normal operation.

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.
  
  Fig 3: Checking Circuit GD116
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?

Yes: INSTALL a new selector lever. REFER to INSTALLATION (Fusion/Milan) and INSTALLATION (MKZ) or INSTALLATION (Hybrid) . TEST the system for normal operation.
No: REPAIR circuit GD116 (BK/VT). TEST the system for normal operation.

Component Tests

Ignition Switch - Mechanical

The following conditions can cause difficulty in operating the ignition switch and lock cylinder:

Damaged or incorrectly cut ignition key
Binding ignition lock cylinder
Binding ignition switch
Binding or damaged steering column lock module

Carry out the following test to determine if the ignition key/lock cylinder, ignition switch and the steering column lock module are operating correctly.

Inspect the ignition key for any burrs, damage or incorrect cut. Have a new ignition key made as necessary. If the key is OK, continue with step 2.
Remove the ignition lock cylinder. Refer to REMOVAL AND INSTALLATION .
Rotate the ignition lock cylinder through all of the switch positions.
- If the lock cylinder operates correctly, install the lock cylinder and continue with step 4.
- If the lock cylinder does not operate correctly, install a new ignition lock cylinder.
Remove the ignition switch. Refer to Removal and Installation .
Rotate the ignition lock cylinder through all of the switch positions.
- If the lock cylinder operates correctly, install a new ignition switch.
- If the lock cylinder does not operate correctly, install a new steering column lock module. Refer to Removal and Installation .