P0627-Fuel Pump Relay Circuit - Chrysler Pacifica CS 2004 Service Manual

Symptom:

P0627-FUEL PUMP RELAY CIRCUIT

When Monitored and Set Condition:
P0627-FUEL PUMP RELAY CIRCUIT
When Monitored: With the ignition on. Battery voltage greater than 10.4 volts.
Set Condition: An open or shorted condition is detected in the fuel pump relay control
circuit. One Trip Fault.
FUEL PUMP RELAY OPERATION
(A14) FUSED IGNITION SWITCH OUTPUT CIRCUIT
FUEL PUMP RELAY RESISTANCE
(K31) FUEL PUMP RELAY CONTROL CIRCUIT OPEN
(K31) FUEL PUMP RELAY CONTROL CIRCUIT SHORT TO GROUND
PCM
TEST
1 Ignition on, engine not running.
With the DRBIII , actuate the Fuel Pump Relay.
Is the Fuel Pump Relay operating?
Yes → Refer to the INTERMITTENT CONDITION symptom in the
→ Go To 2
No
2 Turn the ignition off.
Remove the Fuel Pump Relay from the PDC.
Ignition on, engine not running.
Measure the voltage of the (A14) Fused Ignition Switch Output circuit in the PDC.
Is the voltage above 11.0 volts?
Yes → Go To 3
→ Repair the (A14) Fused Ignition Switch Output circuit. Check and
No
3 Turn the ignition off.
Remove the Fuel Pump Relay from the PDC.
Measure the resistance of the Fuel Pump Relay between the Fused Ignition Switch
Output terminal and the Fuel Pump Relay Control terminal.
Is the resistance between 70 to 95 ohms?
Yes → Go To 4
→ Replace the Fuel Pump Relay.
No
POSSIBLE CAUSES
ACTION
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
replace any open fuses.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
DRIVEABILITY - NGC
239
APPLICABILITY
All
All
All