Chrysler PT Cruiser 2001 Service Manual Supplement page 2641

P1490-LOW SPEED FAN CONTROL RELAY CIRCUIT —
TEST
4 Turn the ignition off.
Remove the Radiator Fan Relay.
Measure the voltage of the Fused Ignition Switch Output circuit in the relay
connector.
Is the voltage above 10.0 volts?
Yes → Go To 5
→ Repair the Fused Ignition Switch Output circuit for an open.
No
5 Turn the ignition off.
Disconnect the PCM harness connector.
Remove the Radiator Fan Relay.
Measure the resistance of the Radiator Fan Relay Control circuit.
Is the resistance below 5.0 ohms?
Yes → Go To 6
→ Repair the Radiator Fan Relay Control circuit for an open.
No
6 Turn the ignition off.
Remove the Radiator Fan Relay.
Disconnect the PCM harness connector.
Measure the resistance between ground and the Radiator Fan Relay Control circuit.
Is the resistance above 100 kohms?
Yes → Go To 7
→ Repair the Radiator Fan Relay Control circuit for a short to
No
7 Turn the ignition off.
Disconnect the PCM harness connector.
Turn the ignition on.
Connect a jumper wire to the Radiator Fan Relay Control circuit in the PCM harness
connector.
Momentarily connect the other end of the jumper wire to ground.
Did the Radiator Fan Relay actuate?
Yes → Go To 8
→ Replace the Radiator Fan Relay.
No
8 If there are no possible causes remaining, view repair.
Repair
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 2.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
ground.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
Replace the Powertrain Control Module.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
DRIVEABILITY - GAS
181
Continued
APPLICABILITY
All
All
All
All
All