Chrysler PT Cruiser. Manual — part 1035
Symptom:
*BACKUP LAMPS INOPERATIVE
POSSIBLE CAUSES
OPEN BACKUP LAMP BULB(S)
BACKUP LAMP GROUND CIRCUIT OPEN
BACKUP LAMP SUPPLY CIRCUIT OPEN
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
TRANSMISSION RANGE SENSOR
INTERMITTENT BACKUP LAMPS
TEST
ACTION
APPLICABILITY
1
Ignition on, engine not running.
Place foot firmly on brake pedal.
Place the shift lever in the reverse position.
Do either of the back-up lamps work?
All
Yes
→ Go To 2
No
→ Go To 3
2
If one backup lamp works, the problem must be in the bulb or the wiring to the one
that doesn’t work. Check the bulb, Backup Lamp Supply circuit and the Ground
circuit to the one that does not work.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit. Wiggle the wires while checking for shorted and open circuits.
View repair options.
All
Repair
Repair as necessary.
3
Turn the ignition off to the lock position.
Remove the Starter Relay.
CAUTION: Removal of the Starter Relay is to prevent a Transmission, NO
RESPONSE, condition and disable the starter.
Install the Transmission Simulator, Miller tool #8333 and the Electronic Transmis-
sion Adapter kit 8333-1A.
Ignition on, engine not running.
Press the
9Reverse Light Test9 button on the Transmission Simulator while observing
the Back-up Lamps.
Do either of the Back-up Lamps come on?
All
Yes
→ Replace the Transmission Range Sensor per the Service Informa-
tion.
No
→ Go To 4
4
Remove both Backup Lamp bulbs.
NOTE: Check the Backup Lamp Sockets and Clean/repair as necessary.
Measure the resistance of the Backup Lamp bulbs.
Is the resistance above 5.0 ohms on either bulb?
All
Yes
→ Replace the Backup Lamp bulb(s). Verify the bulbs illuminate
with the Transmission Simulator.
No
→ Go To 5
172
TRANSMISSION - NGC
TEST
ACTION
APPLICABILITY
5
Turn the ignition off to the lock position.
Disconnect the TRS harness connector.
Ignition on, engine not running.
Using a 12-volt test light connected to ground, check the Fused Ignition Switch
Output circuit in the TRS harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?
All
Yes
→ Go To 6
No
→ Repair the Fused Ignition Switch Output circuit for an open. If
the fuse is open make sure to check for a short to ground.
6
Turn the ignition off to the lock position.
Install the Transmission Simulator, Miller tool #8333 and the Electronic Transmis-
sion Adapter kit 8333-1A.
Remove the Backup Lamp bulb(s).
Ignition on, engine not running.
Note: Check connectors - Clean/repair as necessary.
Using a 12-volt test light connected to ground, check the Backup Lamp Supply circuit
in both Backup Lamp sockets while pressing the Reverse Light Test button on the
Transmission Simulator.
Does the test light illuminate brightly on either Backup Lamb Bulb socket?
All
Yes
→ Repair the Backup Lamp Ground circuit for an open.
No
→ Repair the Backup Lamp Supply circuit for an open.
173
TRANSMISSION - NGC
*BACKUP LAMPS INOPERATIVE —
Continued
Symptom:
*NO MANUAL AUTOSTICK OPERATION
POSSIBLE CAUSES
AUTOSTICK
t DOWNSHIFT SENSE CIRCUIT OPEN
AUTOSTICK
t GROUND CIRCUIT OPEN
AUTOSTICK
t UPSHIFT SENSE CIRCUIT OPEN
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
PCM - AUTOSTICK
t
TEST
ACTION
APPLICABILITY
1
Turn the ignition off to the lock position.
Disconnect the AutoStick
t Switch harness connector.
Note: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
Measure the voltage of the Fused Ignition Switch Output circuit in the AutoStick
t
Switch harness connector.
Is the voltage above 10.0 volts?
All
Yes
→ Go To 2
No
→ Repair the Fused Ignition Switch Output circuit for an open.
2
Turn the ignition off to the lock position.
Disconnect the AutoStick
t Switch harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the AutoStick
t Ground circuit at the
AutoStick
t harness connector.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the AutoStickt Ground circuit for an open.
No
→ Go To 3
3
Turn the ignition off to the lock position.
Disconnect the PCM harness connector.
Disconnect the AutoStick
t Switch harness connector.
Note: Check connectors - Clean/repair as necessary.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the Upshift Sense circuit between the appropriate terminal
of special tool #8815 and the AutoStick
t Switch harness connector.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the AutoStickt Upshift Sense circuit for an open.
No
→ Go To 4
174
TRANSMISSION - NGC
TEST
ACTION
APPLICABILITY
4
Turn the ignition off to the lock position.
Disconnect the PCM harness connector.
Disconnect the AutoStick
t Switch harness connector.
Note: Check connectors - Clean/repair as necessary.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the Downshift Sense circuit between the appropriate
terminal of special tool #8815 and the AutoStick
t Switch harness connector.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the AutoStickt Downshift Sense circuit for an open.
No
→ Go To 5
5
Ignition on, engine not running.
With the DRBIII
t monitor the AutoStickt Switch status.
Firmly apply the brake and shift into AutoStick
t.
Push the shift lever to the right several times to actuate the AutoStick
t Upshift
Switch and then to the left several times to actuate the AutoStick
t Downshift Switch.
Do both AutoStick
t Upshift and Downshift Switch states toggle?
All
Yes
→ Test Complete.
No
→ Replace the Powertrain Control Module per the Service Informa-
tion. WITH THE DRBIII
t PERFORM QUICK LEARN AND
REPROGRAM PINION FACTOR.
175
TRANSMISSION - NGC
*NO MANUAL AUTOSTICK OPERATION —
Continued
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