Diagnosis And Testing - Brake/ Transmission Shift Interlock System - Chrysler 2004 Concorde Service Manual

21 - 138 TRANSAXLE
SHIFT INTERLOCK SYSTEM (Continued)
DIAGNOSIS AND TESTING - BRAKE/
TRANSMISSION SHIFT INTERLOCK SYSTEM
FLOOR SHIFT MODELS
The following chart describes the normal operation
of the Brake Transmission Shift Interlock (BTSI) sys-
tem. If the "expected response" differs from the vehi-
cle's response, then system repair and/or adjustment
is necessary.
Refer to the following chart that expected shifter
response, depending on ignition key/switch (Fig. 373)
and brake pedal positions.
Fig. 373 Ignition Key/Switch Positions
1 - ACC
2 - LOCK
3 - OFF
4 - ON/RUN
5 - START
ACTION
1. Turn key to the OFF
position.
2. Turn key to the
ON/RUN position.
3. Turn key to the
ON/RUN position and
depress the brake pedal.
4. Leave shifter in any
gear and try to return key
to the LOCK or ACC
position.
5. Return shifter to
PARK and try to remove
the key.
6. With the key removed,
try to shift out of PARK .
NOTE: Any failure to meet these expected
responses requires system adjustment or repair.
EXPECTED RESPONSE
1. Shifter CAN be shifted
out of park.
2. Shifter CANNOT be
shifted out of park.
3. Shifter CAN be shifted
out of park.
4. Key cannot be
returned to the LOCK or
ACC position.
5. Key can be removed
(after returning to LOCK
position).
6. Shifter cannot be
shifted out of PARK .
If the floor shifter cannot be moved out of the PARK
position, refer to Shifter Locked In Place below. If the
shift lever can be shifted out of PARK without the brake
pedal depressed, refer to Circuit Test below.
SHIFTER LOCKED IN PLACE
(1) Remove the instrument panel cover below the
steering column, then remove the steering column
shrouds to gain access to the brake transmission
shift interlock (BTSI) solenoid. The solenoid is part of
the interlock cable assembly.
(2) Disconnect the wire connector from the rear of
the BTSI solenoid.
(3) Insert the ignition key and turn it to the ON
position.
(4) With the brakes applied, try moving the shifter
out of the PARK position.
• If the lever now moves freely in and out of
PARK, perform the Circuit Test below.
• If the shift lever still does not move from the
PARK position, remove the BTSI solenoid from the
shift lever assembly.
If the shift lever now moves freely in and out of the
park position, the BTSI solenoid is faulty and the inter-
lock cable must be replaced. If the shift lever still does
not move from the park position, the problem is in the
shift lever assembly or the ignition interlock cassette.
CIRCUIT TEST
(1) Check the system fuse in the junction block
(An open or blown fuse would allow the shift lever to
be moved in and out of the PARK position without
the brake pedal applied).
(2) Remove the instrument panel cover below the
steering column, then remove the steering column
shrouds to gain access to the brake transmission
shift interlock (BTSI) solenoid.
(3) Disconnect the wire connector from the rear of
the BTSI solenoid.
(4) Insert the ignition key and turn it to the ON
position.
(5) Back-probe the wire connector's terminal num-
ber 2 with a test light. The test light should illumi-
nate. If not, there is an open or short in the ignition
feed circuit leading to the BTSI solenoid. Repair the
open or short.
(6) Next, back-probe the wire connector with a test
light, placing the test light in series between the two
wires. At this point, the test light should illuminate.
If not, there is an open in the ground circuit or brake
lamp switch. Repair the open or replace brake lamp
switch as necessary.
(7) Depress the brake pedal. The test light should
go out. If it does not, there is a short in the ground
circuit or brake lamp switch. Repair the short or
replace brake lamp switch as necessary.
LH