Chrysler PT Cruiser 2001 Service Manual Supplement page 2640

DRIVEABILITY - GAS
Symptom:
P1490-LOW SPEED FAN CONTROL RELAY CIRCUIT
When Monitored and Set Condition:
P1490-LOW SPEED FAN CONTROL RELAY CIRCUIT
When Monitored: With the ignition on and battery voltage greater than 10 volts.
Set Condition: An open or shorted condition is detected in the low speed fan relay control
circuit.
RADIATOR FAN CTRL RLY CIRCUIT WIRE HARN INTERMITTENT PROBLEM
RADIATOR FAN CTRL RLY CIRCUIT WIRE HARN OBSERVABLE PROBLEM
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
RADIATOR FAN RELAY CONTROL CIRCUIT OPEN
RADIATOR FAN RELAY CONTROL CIRCUIT SHORTED TO GROUND
RADIATOR FAN RELAY
POWERTRAIN CONTROL MODULE
TEST
1 Turn the ignition on.
With the DRB, actuate the Low Speed Radiator Fan Relay.
Does the Radiator Fan Motor cycle on and off?
Yes → Go To 2
→ Go To 4
No
2 Turn the ignition on.
With the DRB, actuate the Radiator Fan Relay.
Wiggle the wiring harness between the Radiator Fan Relay(s) and the PCM.
Did the wiggling interrupt the Radiator Fan Relay cycling?
Yes → Repair as necessary where wiggling caused the cycling to be
→ Go To 3
No
3 Turn the ignition off.
Using the schematic as a guide, inspect the wiring and connectors.
Were any problems found?
Yes → Repair as necessary.
→ Test Complete.
No
POSSIBLE CAUSES
ACTION
interrupted.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
180
APPLICABILITY
All
All
All