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.

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.
Disconnect the Oil Pressure Switch harness connector.

Ignition on, engine not running.

Connect a jumper wire to the (G60) Oil Pressure Signal circuit in the Switch harness connector.

With the DRBIII® monitor the Oil Pressure Switch state.

Touch the other end of the jumper wire to Ground several times.

Did the Oil Pressure Switch state change from High to Low?
1. Yes --> Replace the Oil Pressure Switch.
  Perform POWERTRAIN VERIFICATION TEST VER - 2 .
2. No --> Go To 3
NOTE: Remove the juniper wire before continuing.
Turn the ignition off.
Disconnect the PCM harness connectors.

Ignition on, engine not running.

Measure the voltage on the (G60) Oil Pressure Signal circuit at the Switch harness connector.

Is the voltage above 5.3 volts?
1. Yes --> Repair the short to voltage on the (G60) Oil Pressure Signal circuit.
  Perform POWERTRAIN VERIFICATION TEST VER - 2 .
2. No --> Go To 4
Turn the ignition off.
Measure the resistance of the (G60) Oil Pressure Signal circuit from the Oil Pressure Switch harness 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 (G60) Oil Pressure Signal circuit.
  Perform POWERTRAIN VERIFICATION TEST VER - 2 .
Measure the resistance between (G60) Oil Pressure Signal circuit and ground at the Switch connector.
Is the resistance below 100 ohms?
1. Yes --> Repair the short to ground in the (G60) Oil Pressure Signal 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 .