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 - 5 .
Turn the ignition off.
Disconnect the Ignition coil harness connector.

Ignition on, engine not running.

Using a 12-volt test light connected to ground, probe the (A142) ASD Relay Output circuit at the coil harness connector.

With the DRBIII®, actuate the ASD Relay.

Does the test light illuminate brightly?
1. Yes --> Go To 3
2. No --> Inspect the related fuse. Repair the open/excessive resistance or short to ground in the (A142) ASD Relay Output circuit.
  Perform POWERTRAIN VERIFICATION TEST VER - 5 .
Stop All Actuations
Turn the ignition off.
The resistance of the 5.

L Primary Ignition coil is 0.65 of and ohm to 1.2 ohms.

The resistance of a 8.0L Primary Ignition coil is 0.53 to 0.65 of an ohm.

Measure the resistance of the primary Ignition coil.

Is the resistance within the appropriate specification?
1. Yes --> Go To 4
2. No --> Replace the Ignition coil.
  Perform POWERTRAIN VERIFICATION TEST VER - 5 .
Using a 12-volt test light connected to a 12-volt source, probe the Ignition Coil Driver circuit.
Crank the engine for 5 seconds while observing the test light.

What is the condition of the test light while cranking the engine?
1. Brightly blinking.
  1. Replace the Ignition Coil Rail.
  2. Perform POWERTRAIN VERIFICATION TEST VER - 5 .
2. ON constantly.
  1. Go To 5
3. OFF constantly.
  1. Go To 6
Turn the ignition off.
Disconnect the PCM harness connectors.

Measure the resistance between the Ignition Coil Control circuit and ground.

Is the resistance below 100 ohms?
1. Yes --> Repair the short to ground in the Ignition Coil Control circuit.
  Perform POWERTRAIN VERIFICATION TEST VER - 5 .
2. No --> Go To 7
Turn the ignition off.
Disconnect the PCM harness connectors.

Measure the resistance of the Ignition Coil Control circuit from the Ignition Coil connector to the PCM connector.

Is the resistance below 5.0 ohms?
1. Yes --> Go To 7
2. No --> Repair the open in the Ignition Coil Control circuit.
  Perform POWERTRAIN VERIFICATION TEST VER - 5 .

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 - 5 .