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.

NOTE: All symptoms listed above are diagnosed using the same tests. The title for the tests will be P0171-1/1 FUEL SYSTEM LEAN.

Check for any related TSBs.
Ignition on, engine not running.

With the DRBIII®, read DTCs and record the related Freeze Frame data.

Is the Good Trip Counter displayed and equal to zero?
1. Yes --> Go To 2
2. No --> Refer to the SYMPTOM: INTERMITTENT CONDITION Symptom (Diagnostic Procedure).
  Perform POWERTRAIN VERIFICATION TEST VER - 2 .
Turn the ignition off.
Remove the ASD Relay from the IPM.

Measure the resistance between the coil terminals of the ASD Relay Is the resistance between 50 and 80 ohms?
1. Yes --> Go To 3
2. No --> Replace the ASD Relay.
  Perform POWERTRAIN VERIFICATION TEST VER - 2 .
Using a 12-volt test light connected to ground, probe the Internal Fused B+ Output circuits in the ASD Relay connector.
Does the test light illuminate brightly?
1. Yes --> Go To 4
2. No --> Repair the open or short to ground in the Internal Fused B+ Output circuit. Inspect the IPM for an internal open circuit.
  Perform POWERTRAIN VERIFICATION TEST VER - 2 .
Disconnect the PCM harness connectors.
Measure the resistance of the (K51) ASD Relay Control circuit from the ASD Relay cavity in the IPM to the PCM harness connector.

Is the resistance below 5.0 ohms?
1. Yes --> Go To 5
2. No --> Repair the open in the (K51) ASD Relay Control circuit.
  Perform POWERTRAIN VERIFICATION TEST VER - 2 .
Measure the resistance between ground and the (K51) ASD Relay Control circuit.
Is the resistance below 100 ohms?
1. Yes --> Repair the short to ground in the (K51) ASD 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 more 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 .