Jeep Cherokee (XJ): Transmission cooler. Brake transmission shift interlock mechanism

Transmission cooler

DESCRIPTION

MAIN COOLER

The transmission main cooler is located in the radiator. The main cooler can be flushed when necessary, however, the cooler is not a repairable component.

If the cooler is damaged, plugged, or leaking, the radiator will have to be replaced.

AUXILIARY COOLER

The auxiliary cooler is mounted in front of the radiator at the driver side of the vehicle (Fig. 36).

The cooler can be flushed when necessary, while mounted in the vehicle. The cooler can also be removed for access, repair, or replacement as needed.

The main and auxiliary coolers should both be flushed whenever a transmission or converter clutch malfunction generates sludge, debris, or particles of clutch friction material.

Fig. 36 Auxiliary Cooler Mounting (Left Hand Drive)

1 - COOLER INLET LINE
2 - COOLER RETURN LINE
3 - COOLER LINE BRACKET
4 - CLIP
5 - RADIATOR
6 - AUXILIARY COOLER
7 - COOLER RETURN LINE
8 - OUTLET LINE (FROM TRANSMISSION)
9 - RETURN LINE (TO TRANSMISSION)
10 - COOLER RETURN LINE
11 - RADIATOR

COOLER SERVICE

The main cooler (and radiator) and the auxiliary cooler can be removed for service or access to other components. Auxiliary cooler removal requires that the front bumper and radiator support be removed for access to the cooler lines and attaching bracket.

Brake transmission shift interlock mechanism

DESCRIPTION

The Brake Transmission Shifter/Ignition Interlock (BTSI), is a cable and solenoid operated system. It interconnects the automatic transmission floor mounted shifter to the steering column ignition switch (Fig. 37).

OPERATION

The system locks the shifter into the PARK position.

The Interlock system is engaged whenever the ignition switch is in the LOCK or ACCESSORY position.

An additional electrically activated feature will prevent shifting out of the PARK position unless the brake pedal is depressed at least one-half an inch. A magnetic holding device in line with the park/brake interlock cable is energized when the ignition is in the RUN position. When the key is in the RUN position and the brake pedal is depressed, the shifter is unlocked and will move into any position. The interlock system also prevents the ignition switch from being turned to the LOCK or ACCESSORY position (Fig. 38) unless the shifter is fully locked into the PARK position.

Fig. 37 Ignition Interlock Cable Routing

1 - SHIFT MECHANISM
2 - LOCK-TAB
3 - IGNITION LOCK INTERLOCK
4 - STEERING COLUMN
5 - SOLENOID
6 - WIRE CONNECTOR
7 - LEVER
8 - MOUNT BRACKET
9 - SHIFT CABLE
10 - AUTOMATIC TRANSMISSION
11 - TIE STRAP
12 - PARK/BRAKE INTERLOCK CABLE

Fig. 38 Ignition Key Cylinder Actuation

1 - SLIDER LOCKED
2 - CAM RETURN SPRING
3 - INTERLOCK CABLE
4 - CAM
5 - SLIDER