TEST
ACTION
APPLICABILITY
5
Turn the ignition off.
Disconnect the PCM harness connector(s).
Remove the Radiator Fan Relay for the PDC.
Measure the resistance of the Radiator Fan Relay Control circuit form PDC to PCM
harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→
Go To
6
No
→
Repair the open Radiator Fan Relay Control Circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
6
Turn the ignition off.
Remove the Radiator Fan Relay from the PDC.
Disconnect the PCM harness connector(s).
Measure the resistance between ground and the Radiator Fan Relay Control circuit.
Is the resistance above 100 kohms?
All
Yes
→
Go To
7
No
→
Repair the Radiator Fan Relay Control Circuit for a short to
ground.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
7
Turn the ignition off.
Disconnect the PCM harness connector(s).
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 actuate?
All
Yes
→
Go To
8
No
→
Replace the Radiator Fan Relay.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
8
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
229
DRIVEABILITY - GAS
P1491-RAD FAN CONTROL RELAY CIRCUIT —
Continued