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.
POSSIBLE CAUSES
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 ACTION APPLICABILITY
1 Ignition on, engine not running.
With the DRBIIIt, actuate the Fuel Pump Relay.
Is the Fuel Pump Relay operating?
All
Yes → Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Go To 2
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?
All
Yes → Go To 3
No → Repair the (A14) Fused Ignition Switch Output circuit. Check and
replace any open fuses.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
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 90 ohms at 70°F (21°C)?
All
Yes → Go To 4
No → Replace the Fuel Pump Relay.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
228
DRIVEABILITY - NGC
To Next Page
Loading...
Need help?
General
