Chrysler 300M 2002 Service Manual page 2631

DRIVEABILITY - NGC
P0481-HIGH SPEED FAN CONTROL RELAY CIRCUIT —
TEST
5 Turn the ignition off.
Remove the High 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 High Speed Radiator 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 6
→ Repair the open in the High Speed Radiator Fan Relay Control
No
6 Turn the ignition off.
Remove the High Speed Radiator Fan Relay from the PDC.
Disconnect the PCM harness connector.
Measure the resistance between ground and the High Speed Radiator Fan Relay
Control circuit in the PDC.
Is the resistance below 5.0 ohms?
Yes → Repair the short to ground in the High Speed Radiator Fan Relay
→ Go To 7
No
7 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
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Control circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
202
Continued
APPLICABILITY
All
All
All