Dodge ZB 2005 Service Manual page 1320

*CHECKING FUEL DELIVERY —
TEST
3 Turn the ignition off.
WARNING: The fuel system is under a constant pressure even with the
engine off. Before testing or servicing any fuel system hose, fitting or line,
the fuel system pressure must be released.
Raise vehicle on hoist, and disconnect the fuel pressure line at the fuel pump module.
Install special tool #6539 (5/16 ) or #6631(3/8 ) fuel line adapter and the fuel pressure
gauge between the fuel supply line and the fuel pump module.
Ignition on, engine not running.
With the DRBIII , actuate the ASD Fuel System test and observe the fuel pressure
gauge.
NOTE: Fuel pressure specification is 379 KPa +/- 14 KPa (55 psi +/- 2 psi).
Is the fuel pressure within specification now?
Yes → Repair/replace fuel supply line as necessary.
→ Go To 4
No
CAUTION: Stop All Actuations.
4 Turn the ignition off.
WARNING: The fuel system is under a constant pressure even with the
engine off. Before testing or servicing any fuel system hose, fitting or line,
the fuel system pressure must be released.
Remove the Fuel Pump Module and inspect the Fuel Inlet Strainer.
Is the Fuel Inlet Strainer plugged?
Yes → Replace the Fuel Pump Inlet Strainer.
→ Replace the Fuel Pump Module.
No
5 Turn the ignition off.
Disconnect the fuel pump module harness connector.
Ignition on, engine not running.
With the DRBIII , actuate the ASD Fuel System test.
Using a 12-volt test light connected to ground, probe the Fuel Pump Relay Output
circuit at the Fuel Pump Module harness connector.
Does the test light illuminate brightly?
Yes → Go To 6
→ Go To 8
No
CAUTION: Stop All Actuations.
6 Turn the ignition off.
Disconnect the Fuel Pump Module harness connector.
NOTE: Check connectors and ground - Clean/repair as necessary.
Using a test light connected to 12-volts, backprobe the (Z1) ground circuit at the Fuel
Pump Module harness connector.
Does the test light illuminate brightly?
Yes → Go To 7
→ Repair the open and/or high resistance in the Fuel Pump Ground
No
Continued
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 1.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
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APPLICABILITY
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