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.

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 - 6 .
Pressurize the EVAP System. On Miller Tool #8404, hold down the remote smoke/air start button and monitor the gauge.
When the flow meter gauge on the EELD reads 0 LPM, the EVAP system is completely pressurized.

Disconnect the LDP Pressure hose at the EVAP Canister. The LDP Pressure hose is the hose that connects the Evap Canister to the Leak Detection Pump.

Did the pressure drop when the hose was disconnected?
1. Yes --> Go To 3
2. No --> Replace the EVAP Canister.
  Perform POWERTRAIN VERIFICATION TEST VER - 6 .

NOTE: Connect all previously disconnected hose(s).

Re-pressurize the EVAP System. On Miller Tool #8404, hold down the smoke/air start button and monitor the gauge.
When the flow meter gauge on the EELD reads 0 LPM, the EVAP system is completely pressurized.

Disconnect the EVAP hoses at the Purge Solenoid.

Did the pressure drop when the hose was disconnected?
1. Yes --> Go To 4
2. No --> Repair or replace hose/tube as necessary.
  Perform POWERTRAIN VERIFICATION TEST VER - 6 .
Disconnect and remove the LDP pressure hose. The LDP pressure hose is the hose that connects the EVAP Canister to the Leak Detection Pump.
Inspect the LDP pressure hose for any obstructions or physical damage.

Is the LDP pressure hose free from defects?
1. Yes --> Replace the Leak Detection Pump.
  Perform POWERTRAIN VERIFICATION TEST VER - 6 .
2. No --> Repair/replace hose as necessary.
  Perform POWERTRAIN VERIFICATION TEST VER - 6 .