Chrysler Pacifica CS 2004 Service Manual page 195

P0480-COOLING FAN 1 CONTROL CIRCUIT —
TEST
3 Turn the ignition off.
Remove the Low Speed Radiator Fan Relay from the PDC.
Measure the resistance of the Low Speed Radiator Fan Relay between the Fused
Ignition Switch Output terminal and the Low Speed Rad Fan Relay Control
terminal.
Is the resistance between 60 to 85 ohms?
Yes → Go To 4
→ Replace the Low Speed Radiator Fan Relay.
No
4 Turn the ignition off.
Remove the Low Speed Radiator Fan Relay from the PDC.
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.
Measure the resistance of the (C24) Low Speed Rad Fan Relay Control circuit from
the PDC to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
Yes → Go To 5
→ Repair the open in the (C24) Low Speed Rad Fan Relay Control
No
5 Turn the ignition off.
Remove the Low Speed Radiator Fan Relay from the PDC.
Disconnect the PCM harness connector.
Measure the resistance between ground and the (C24) Low Speed Rad Fan Control
circuit at the PDC.
Is the resistance below 100 ohms?
Yes → Repair the short to ground in the (C24) Low Speed Rad Fan Relay
→ Go To 6
No
6 NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
If there are no possible causes remaining, view repair.
Repair
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Control circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
DRIVEABILITY - NGC
Continued
189
APPLICABILITY
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All
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All