Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Dodge Pickup and 2004 Dodge Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Refer to VERIFICATION TESTS for appropriate verification test procedures.

Ignition on, engine not running.
With the DRBIII®, read DTCs and record the related Freeze Frame data.

Check for any related TSBs.

With the DRBIII®, actuate the Fuel Pump Relay.

Is the Fuel Pump Relay clicking?
1. Yes --> Refer to the SYMPTOM: INTERMITTENT CONDITION Symptom (Diagnostic Procedure).
  Perform POWERTRAIN VERIFICATION TEST VER - 2 .
2. No --> Go To 2
Turn the ignition off.
Remove the Fuel Pump Relay.

NOTE: Check connectors - Clean/repair as necessary.

Measure the resistance between the coil terminals of the Fuel Pump Relay.

Is the resistance between 50 and 90 ohms?
1. Yes --> Go To 3
2. No --> Replace the Fuel Pump Relay.
  Perform POWERTRAIN VERIFICATION TEST VER - 2 .
Ignition on, engine not running.
Using a 12-volt test light connected to ground, probe the (Y135) Fused Ignition Switch output circuit in the Fuel Pump Relay connector.

Does the test light illuminate brightly?
1. Yes --> Go To 4
2. No --> Repair the open or short to ground in the (Y135) Fused Ignition Switch Output circuit. Inspect the related fuse and repair as necessary.
  Perform POWERTRAIN VERIFICATION TEST VER - 2 .
Turn the ignition off.
Disconnect the PCM harness connectors.

Measure the resistance of the (K31) Fuel Pump Relay Control circuit from the Fuel Pump Relay connector to the PCM harness connector.

Is the resistance below 5.0 ohms?
1. Yes --> Go To 5
2. No --> Repair the open in the (K31) Fuel Pump Relay Control circuit.
  Perform POWERTRAIN VERIFICATION TEST VER - 2 .
Measure the resistance between ground and the (K31) Fuel Pump Relay Control circuit at the IPM.
Is the resistance below 100 ohms?
1. Yes --> Repair the short to ground in the (K31) Fuel Pump Relay Control circuit.
  Perform POWERTRAIN VERIFICATION TEST VER - 2 .
2. No --> Go To 6

NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.
If there are no possible causes remaining, view repair.
1. Repair
  1. Replace and program the Powertrain Control Module per Service Information.
  2. Perform POWERTRAIN VERIFICATION TEST VER - 2 .