Diagnosis And Testing - Shift Interlock Cable/Brake Transmission Shift Interlock Diagnosis

The Shift Interlock Cable is attached to a lever within the Shifter that prevents the Shift Lever from moving out of "Park" without the key. The Shift Interlock Cable adjustment is preset at the factory. When properly adjusted, the Shift Interlock System prevents the key being removed from the Key Cylinder when the Shift Lever is in a position other than "Park". The Brake Transmission Shift Interlock (BTSI) system prevents the shifter from being moved unless the brake pedal is applied.

NOTE:

Investigate and resolve any DTCs prior to starting mechanical diagnosis.

NOTE:

It is assumed that the brake pedal is depressed a minimum of 1/2 inch (12.5mm) for all of the following symptoms.

SHIFT INTERLOCK CABLE DIAGNOSIS

Symptom	Possible Cause	Corrective Action
Key is trapped and cannot be removed from the ignition when the Shift Lever is in the Park position.	1. The Shift Interlock Cable is out of adjustment.	1. Inspect and adjust the Shift Interlock Cable. Refer to the adjustment procedure for the applicable transmission.
	2. The Shift Interlock Cable is not secured properly at the shifter housing.	2. Ensure that the Shift Interlock Cable is properly secured at the shifter housing.
	3. Shift Interlock Cable routing through the instrument panel area is causing increased friction within the Shift Interlock Cable Housing (bind/kink in Shift Interlock Cable).	3. Check the Shift Interlock Cable Housing routing. The Shift Interlock Cable has a clip that locates it to the Instrument Panel structure. The Shift Interlock Cable must be free to move through this clip. The clip is located behind the panel.
Key can be removed no matter what position the Shift Lever is in.	1. The Shift Interlock Cable is broken or not secured properly at the shifter housing.	1. Ensure that the Shift Interlock Cable is properly secured to the shifter housing or replace the cable if broken
	2. The Shift Interlock Cable is broken or not secured at the Lock Housing.	2. Ensure that the Shift Interlock Cable is properly secured to the Lock Housing or replace the cable if broken.
Shift Lever will not move to the right so that it can be moved out of the Park position.	1. Shifter Interlock Mechanism is binding due to loose or damaged components.	1. Physically inspect the shifter and repair or replace any damaged or loose components.
Shift Lever will move to the right but will not move down toward the Reverse position	1. Shift Interlock Lever within the shifter is not releasing when the key is turned to the "On" or "Run" positions.	1. Check Shift Interlock Cable operation and cable adjustment.
	2. Shift Interlock Cable is severely kinked or routed improperly.	2. Check Shift Interlock Cable routing or replace the cable if severely kinked.
Shift Lever can be moved without turning the key on or the key removed.	1. Shift Interlock Cable Cartridge not properly installed into the Lock Housing.	1. Check for correct installation of the Shift Interlock Cable into the Lock Housing.

BTSI DIAGNOSIS

Symptom	Possible Cause	Corrective Action
Key in the On position, Shift Lever will not move to the right so that it can be moved out of the Park position.	1. Park Lock Lever on the right side of the shifter is not moving when the brake pedal is depressed.	1. Verify BTSI operation. Refer to DIAGNOSIS AND TESTING .
	1. Park Lock Lever is sluggish and scraping against the inside of the Shifter Housing.	1. Verify BTSI operation. Repair or replace any damaged or loose components. Refer to DIAGNOSIS AND TESTING .

Use the table below to verify the condition of the Shift Interlock System.

ACTION	EXPECTED RESPONSE
1. Turn key to the "ACC" position and depress brake pedal.	1. Shifter CAN be shifted out of park.
2. Turn key to the "ON" position, with foot off of brake pedal.	2. Shifter CANNOT be shifted out of park.
3. Turn key to the "ON" position and depress the brake pedal.	3. Shifter CAN be shifted out of park.
4. Leave shifter in any gear and try to return key to the "LOCK" position.	4. Key cannot be returned to the "LOCK" position.
5. Return shifter to "PARK" and try to remove the key.	5. Key can be removed after returning to "LOCK" position.
6. With the key removed, try to shift out of "PARK".	6. Shifter cannot be shifted out of "PARK".