Chrysler PT Cruiser. Manual — part 358
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect the Instrument Cluster harness connector.
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 PCI Bus circuit from the Instrument Cluster harness
connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes
→ Replace Instrument Cluster in accordance with the Service Infor-
mation.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.
No
→ Repair the PCI Bus circuit between the PCM and the Instrument
Cluster for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.
522
DRIVEABILITY - NGC
U110C-NO FUEL LEVEL BUS MESSAGE —
Continued
Symptom:
*CHECKING PCM POWER AND GROUND CIRCUITS
POSSIBLE CAUSES
(A14) PCM FUSED B+ CIRCUIT
(A41) PCM FUSED IGNITION SWITCH OUTPUT CIRCUIT
(Z12) PCM GROUND CIRCUITS
TEST
ACTION
APPLICABILITY
1
NOTE: The battery must be fully charged before continuing.
Turn the ignition off.
Disconnect the PCM harness connector.
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.
Using a 12-volt test light connected to ground, probe the (A14) PCM Fused B+ circuit
in the Pinout Box.
Does the test light illuminate brightly?
All
Yes
→ Go To 2
No
→ Repair the (A14) Fused B+ circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.
2
Turn the ignition off.
Disconnect the PCM harness connector.
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.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the (A41) PCM Fused Ignition
Switch Output circuit in the Pinout Box.
Does the test light illuminate brightly?
All
Yes
→ Go To 3
No
→ Repair the (A41) Ignition Switch Output circuit
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.
3
Turn the ignition off.
Disconnect the PCM harness connector.
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.
Using a 12-volt test light connected to battery voltage, probe the (Z12) PCM ground
circuits in the Pinout Box.
Does the test light illuminate brightly?
All
Yes
→ Test Complete.
No
→ Repair the (Z12) PCM ground circuits.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.
523
DRIVEABILITY - NGC
Symptom:
*CHECKING RADIATOR FAN RELAY OUTPUT
POSSIBLE CAUSES
RADIATOR FAN RELAY OPERATION
GROUND CIRCUIT OPEN
RADIATOR FAN MOTOR
FUSED B+ CIRCUIT
RADIATOR FAN RELAY OUTPUT CIRCUIT
RADIATOR FAN RELAY
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, actuate the Radiator Fan Relay.
Is the Radiator Fan actuating?
All
Yes
→ The Radiator Fan System operating properly at this time.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.
No
→ Go To 2
2
Turn the ignition off.
Disconnect the Radiator Fan harness connector.
Measure the resistance between the Ground circuit in the Radiator Fan harness
connector to ground.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 3
No
→ Repair the Ground circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.
3
Disconnect the Radiator Fan harness connector.
Turn the ignition on.
With the DRBIII
t, actuate the Radiator Fan Relay.
Measure the voltage of the Radiator Fan Relay Output circuit in the Radiator Fan
harness connector.
Is the voltage above 11.0 volts?
All
Yes
→ Replace the Radiator Fan Motor.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.
No
→ Go To 4
4
Turn the ignition off.
Remove the Radiator Fan Relay from the PDC.
Using a 12-volt test light connected to ground, probe the Fused B+ circuit in the PDC.
Does the test light illuminate brightly?
All
Yes
→ Go To 5
No
→ Repair the Fused B+ circuit. Inspect fuses and replace as neces-
sary.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.
524
DRIVEABILITY - NGC
TEST
ACTION
APPLICABILITY
5
Turn the ignition off.
Remove the Radiator Fan Relay from the PDC.
Disconnect the Radiator Fan harness connector.
Measure the resistance of the Radiator Fan Relay Output circuit between the PDC
and the Radiator Fan harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Replace the Radiator Fan Relay.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.
No
→ Repair the Radiator Fan Relay Output circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.
525
DRIVEABILITY - NGC
*CHECKING RADIATOR FAN RELAY OUTPUT —
Continued
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