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Home >> Jeep >> 2007 >> Commander Base, 4.7 P, AWD >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> 545RFE Automatic Transmission (Service Information) >> 545RFE - Service Information >> Mechanism-Brake Transmission Shift Interlock >> Diagnosis And Testing >> Brake Transmission Shift Interlock Mechanism >> System Verification

System Verification

  1. Verify that the key can only be removed in the PARK position
  2. When the shift lever is in PARK, the ignition key cylinder should rotate freely from ACC to LOCK. When the shifter is in any other gear or neutral position, the ignition key cylinder should not rotate to the LOCK position.
  3. Shifting out of PARK should not be possible when the ignition key cylinder is in the ACC position and the brake pedal is not depressed.
  4. Shifting out of PARK should not be possible while applying normal force on the shift lever and ignition key cylinder is in the ACC, ON, or START positions unless the foot brake pedal is depressed approximately 1/2 inch (12 mm).
  5. Shifting out of PARK should not be possible when the ignition key cylinder is in the LOCK position, regardless of the brake pedal position.
  6. Shifting between any gears, NEUTRAL or into PARK may be done without depressing foot brake pedal with ignition switch in ACC, ON, or START positions.
DIAGNOSTIC CHART

CONDITION  POSSIBLE CAUSE  CORRECTION 
KEY WILL NOT ROTATE TO THE LOCK POSITION. 1. Misadjusted Park Lock cable. 1. Adjust Park Lock cable.
2. Misadjusted gearshift cable. 2. Adjust gearshift cable.
3. Burrs on ignition key. 3. Remove burrs and cycle key several times to verify operation.
4. Binding or broken components. 4. Inspect system components and repair/replace components as necessary.
VEHICLE WILL NOT START UNLESS SHIFTER IS HELD FORWARD, OR REARWARD, OF THE PARK POSITION. 1. Misadjusted gearshift cable. 1. Adjust gearshift cable.
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