Chrysler 300M 2002 Service Manual page 2680

P0627-FUEL PUMP RELAY CIRCUIT —
TEST
5 Turn the ignition off.
Remove the Fuel Pump 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 Fuel Pump 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 Fuel Pump Relay Control circuit.
No
6 Turn the ignition off.
Remove the Fuel Pump Relay from the PDC.
Measure the resistance between ground and the Fuel Pump Relay Control circuit in
the PDC.
Is the resistance below 5.0 ohms?
Yes → Repair the short to ground in the Fuel Pump Relay Control
→ 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
Perform POWERTRAIN VERIFICATION TEST VER - 5.
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.
DRIVEABILITY - NGC
Continued
251
APPLICABILITY
All
All
All