Charge Air Cooler Diagnosis (System Smoke Test)

Charge Air Cooler Diagnosis (System Smoke Test)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview)provides an overview of each diagnostic category.

Circuit/System Description

The purpose of the charge air cooler (CAC) smoke test is to aid in finding an air leak between the throttle body (TB) and the turbocharger (TC).

Reference Information
Description and Operation

* Turbocharger System Description (Description and Operation)
* Boost Control System Description (Description and Operation)

Special Tools

* J 41413-200 (J 41413-100) - Evaporative Emission System Tester (EEST)
* J 41413-SPT - High Intensity White Light

Smoke Test Application

Note: To operate the EVAP tester, refer to J 41413-200 (J 41413-100) - Evaporative Emission System Tester (EEST) operation manual.

1. Perform a visual inspection of all of the TC components, including raising the vehicle for an underneath inspection.
2. Verify the tightness, fit, and proper connection of all hoses, pipes, clamps, CAC, and the TC.
3. Place the air filter in a disposable plastic bag in the air cleaner housing to help prevent smoke leakage.
4. Using the appropriate adapter, connect the J 41413-200 (J 41413-100) - Evaporative Emission System Tester (EEST) to the vehicle at the charge air bypass valve solenoid hose that leads to the CAC outlet pipe.
5. Apply smoke continuously with the J 41413-200 (J 41413-100) - Evaporative Emission System Tester (EEST) while manipulating and applying pressure by hand to all hoses, pipes and the CAC.
6. To improve the visibility of any smoke exiting the system, observe all of the TC components from different angles.

• If a leak is detected, correctly position, tighten, repair, or replace the component as necessary.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.