Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1954

Installer, Seal - 8902A

Tool, Staking - 9078

Remover, Bearing - 9082

Installer, Bearing - 9287

Dipstick - 9336

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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION

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MECHANISM-BRAKE TRANSMISSION SHIFT INTERLOCK

DESCRIPTION

The

Brake

Transmission

Shifter/Ignition

Interlock

(BTSI) is a cable operated system that prevents the
transmission gear shifter from being moved out of
PARK without the proper driver inputs. The system
also contains a solenoid that is integral to the shifter
assembly. The solenoid works in conjunction with the
park lock cable to permit shifter movement out of
PARK when the brake is depressed and prevents
shifter movement into REVERSE unless a shift into
REVERSE is permitted.

A BTSI override (2) is provided on the side of the
shifter mechanism (1) to allow the vehicle to be shifted
out of PARK in the event of an electrical failure.

OPERATION

The

Brake

Transmission

Shifter/Ignition

Interlock

(BTSI) is engaged whenever the ignition switch is in
the LOCK (1) position. An additional electrically acti-
vated feature will prevent shifting out of the PARK
position unless the brake pedal is depressed at least
one-half inch. A solenoid in the shifter assembly is
energized when the ignition is in the ON position and
the brake pedal is depressed. When the key is in the
ON 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 position, unless the shifter
is in the gated PARK position.

The following chart describes the normal operation of the Brake Transmission Shift Interlock (BTSI) system. If the
“expected response” differs from the vehicle’s response, then system repair and/or adjustment is necessary.

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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION

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ACTION

EXPECTED RESPONSE

1. Turn key to the

9

ACC

9

position and depress brake

pedal.

1. Shifter CAN be shifted out of park.

2. Turn key to the

9

ON

9

position, with foot off of brake

pedal.

2. Shifter CANNOT be shifted out of park.

3. Turn key to the

9

ON

9

position and depress the brake

pedal.

3. Shifter CAN be shifted out of park.

4. Leave shifter in any gear, except

9

PARK

9

, and try to

return key to the

9

LOCK

9

position.

4. Key cannot be returned to the

9

LOCK

9

position.

5. Return shifter to

9

PARK

9

and try to remove the key.

5. Key can be removed (after returning to

9

LOCK

9

position).

6. With the key removed, and the brake depressed, try
to shift out of

9

PARK

9

.

6. Shifter cannot be shifted out of

9

PARK

9

.

NOTE: Any failure to meet these expected responses requires system adjustment or repair.

BTSI Override

In the event of an electrical failure, the vehicle can be
shifted out of PARK by using the following procedure.

1. Turn the key to the ACC or ON position.

2. Remove the liner to the cubby bin to the right side

of the shifter.

3. Depress the BTSI override (2) on the side of the

shifter assembly (1).

4. While the override is depressed, move the shifter

out of the PARK position.

5. Return the cubby bin liner to its original location.

DIAGNOSIS AND TESTING - BRAKE TRANSMISSION SHIFT INTERLOCK

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 cyl-

inder is in the ACC, ON, or START positions unless the foot brake pedal is depressed approximately 1/2 inch
(12mm).

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.

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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION

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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. (Refer to
21 - TRANSMISSION AND
TRANSFER CASE/AUTOMATIC
TRANSMISSION/BRAKE
TRANSMISSION SHIFT
INTERLOCK SYSTEM -
ADJUSTMENTS)

2. Misadjusted gearshift cable.

2. Adjust gearshift cable. (Refer to
21 - TRANSMISSION AND
TRANSFER CASE/AUTOMATIC
TRANSMISSION/GEAR SHIFT
CABLE - ADJUSTMENTS)

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. Adjsut gearshift cable. (Refer to
21 - TRANSMISSION AND
TRANSFER CASE/AUTOMATIC
TRANSMISSION/GEAR SHIFT
CABLE - ADJUSTMENTS)

ADJUSTMENTS - BRAKE TRANSMISSION SHIFT INTERLOCK

The park interlock cable is part of the brake/shift lever interlock system. Correct cable adjustment is important to
proper interlock operation. The gear shift and park lock cables must both be correctly adjusted in order to shift out
of PARK.

ADJUSTMENT PROCEDURE

1. Remove floor console as necessary for access to the park lock cable. (Refer to 23 - BODY/INTERIOR/FLOOR

CONSOLE - REMOVAL)

2. Shift the transmission into the PARK position.

3. Turn ignition switch to LOCK position. Be sure ignition key cylinder is in the LOCK position. Cable will not

adjust correctly in any other position.

NOTE: If the key will not turn to the LOCK position, pull up on the cable lock button and manually move the
cable in and out until the key can be turned to the LOCK position.

4. Pull cable lock button up to release cable, if necessary.

5. Remove and discard the cable adjuster lock pin, if a new cable is being installed.

6. Ensure that the cable is free to self-adjust by pushing cable rearward and releasing.

7. Push lock button down until it snaps in place. The lock should be 1-2mm below the surface of the cylinderical

portion of the cable adjustment housing.

BTSI FUNCTION CHECK

1. Verify removal of ignition key allowed in PARK position only.

2. When the shift lever is in PARK, the ignition key cylinder should rotate freely LOCK position. When the shifter is

in any other position, the ignition key should not rotate to the LOCK position.

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