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 Power Steering Pressure Switch harness connector.

Ignition on, engine not running.

Connect a Jumper Wire to the (S28) Power Steering Pressure Switch Signal circuit at harness connector.

Using the DRBIII®, monitor the Power Steering Pressure Switch.

Touch the Jumper Wire to the (Z244) Ground circuit at the Power Steering Pressure Switch harness connector several times.

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

Measure resistance of (S28) Power Steering Pressure Switch Signal circuit from PCM harness connector to Power Steering Pressure Switch harness connector.

Is the resistance below 5.0 ohms?
1. Yes --> Go To 4
2. No --> Repair the open in the (S28) Power Steering Switch Signal circuit.
  Perform POWERTRAIN VERIFICATION TEST VER - 2 .
Measure the resistance between ground and the (S28) Power Steering Pressure Switch Signal circuit at the P/S Switch harness connector.
Is the resistance below 100 ohms?
1. Yes --> Repair the short to ground in the (S28) Power Steering Pressure Switch Signal circuit.
  Perform POWERTRAIN VERIFICATION TEST VER - 2 .
2. No --> Go To 5
With a 12-volt test light connected to 12-volts, probe the (Z224) P/S Pressure Switch ground circuit.
Does the test light illuminate brightly?
1. Yes --> Go To 6
2. No --> Repair the open in the (Z244) Power Steering Pressure Switch ground circuit.
  Perform POWERTRAIN VERIFICATION TEST VER - 2 .

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 .