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.
(8) Reconnect the wire connector to the solenoid.
If the circuit passes the above test and the shifter
can still be moved freely in and out of PARK without
the brake pedal depressed, replace the interlock
cable.
SHIFT POSITION INDICATOR
The transmission range sensor (on the valve body)
sends a signal to the TCM on the position of the
transaxle manual valve lever. The TCM receives the
switch signal and processes the data. The TCM sends
the Shift Lever Position (SLP) information to the
BCM via the communication bus. The BCM then out-
lines the appropriate shifter position indicator in the
instrument cluster.
If a problem arises with the shifter position indica-
tor, consult the following chart for diagnostic infor-
mation. If the malfunction cannot be corrected using
the chart, consult the proper diagnostic manual.
To replace the shifter position indicator, refer to
Group 8E, Instrument Panel And Gauges.
AUTOSTICK
The autostick feature will be deactivated if one of
the following conditions occur:
• DTC P0705–Check Shifter Signal–usually
accompanied by all PRNDL lights turning on in Park
and Neutral. This will result in a DTC P0705 if three
such errors are detected after any one “key–on”.
• DTC P1796–Autostick Input Circuit
• DTC P1797–Manual Shift Overheat–(Transmis-
sion oil temperature >275° F) or (Engine coolant tem-
perature >255° F).
Acceptable powertrain temperature must be
achieved to reactivate Autostick after a high temper-
ature fault:
• Transmission Oil Temperature <255° F
• Engine Coolant Temperature <240° F
CONDITION POSSIBLE CAUSE
ALL PRND3L
(PRND1234 if Autostick
equipped) DISPLAY
LIGHTS “ON” IN P&N
GEAR POSITIONS
Check wiring and
connectors
Faulty TRS
Faulty manual lever
ALL DISPLAY LIGHTS
“ON” IN ALL GEAR
POSITIONS
Check wiring &
connectors
Faulty trans. range
sensor
Faulty manual lever
Communication bus
malfunction
ALL DISPLAY LIGHTS
“OFF9
Normal transient
condition between P&R
and R&N gear positions
Check shift lever linkage
BCM malfunction
Check wiring and
connectors
Faulty instrument cluster
ALL DISPLAY LIGHTS
9OFF” ACCOMPANIED
BY A “NO BUS”
MESSAGE
Communication bus
malfunction
DISPLAY LIGHTS OUT
OF SEQUENCE WITH
SHIFT LEVER
Check wiring and
connectors
Faulty TRS
Faulty manual lever
Communication bus
malfunction
21 - 28 42LE TRANSAXLE LH
DIAGNOSIS AND TESTING (Continued)
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