Test KA: Turbocharger System Performance
PINPOINT TEST KA: TURBOCHARGER SYSTEM PERFORMANCEFlow Chart:
This pinpoint test is intended to diagnose the following:
- Turbocharger
- Turbocharger actuator solenoid
- Harness circuit: PWRGND
- Powertrain control module (PCM) (12A650)
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KA1 : PRELIMINARY DIAGNOSIS
- Ignition OFF.
- Carry out a visual inspection.
- Ignition ON, engine OFF.
- Record the freeze frame data
- Retrieve the continuous memory DTCs.
- Clear the DTCs.
- Carry out the KOEO and KOER self-test. Quick Test Description
- Are any DTCs present?
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KA2 : CARRY OUT THE EGR TEST 8. Exhaust Gas Recirculation (EGR) System Test
NOTE:
- Incorrect EGR valve operation may affect turbocharger diagnostics
- Refer to the scan tool information menu for examples of EGR test results
- Using the scan tool, carry out the Powertrain Air Management Exhaust Gas Recirculation (EGR) System Test. Refer to Performance Diagnostic Procedures, Exhaust Gas Recirculation (EGR) System Test 8. Exhaust Gas Recirculation (EGR) System Test
- Is a concern present?
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KA3 : CARRY OUT THE TURBO BOOST TEST 13. Turbo Boost Test
NOTE:
- If a sensor fails the turbo boost test, the test will abort. Refer to the appropriate sensor pinpoint test to continue diagnosis.
- Refer to the scan tool information menu for examples of the turbo boost test results
- Using the scan tool, carry out the Powertrain Air Management Turbo Boost Test
- Are any concerns present?
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KA4 : CARRY OUT THE TURBO VVT TEST
NOTE:
- The Vane Position Sensor Cable Kit (418-626) is required to carry out this test.
- Refer to the scan tool information menu for examples of the turbo VVT test results
- Using the scan tool, carry out the Powertrain Air Management Turbo VVT Test
- Are any concerns present?
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KA5 : CHECK THE OPERATION OF THE VGT ACTUATOR
NOTICE: The VGT actuator valve is sensitive to contamination. All work areas must be clean before starting this procedure. Do not allow contamination to enter the valve ports, cam follower, or turbocharger housing. Handle the VGT actuator by the solenoid body only. Do not attempt to clean or wipe oil off the valve at this time. Do not let the valve come in contact with materials that could contaminate the valve mechanism
- Ignition OFF.
- VGT Actuator connector disconnected.
- Remove the VGT actuator from the turbocharger assembly
- VGT Actuator connector connected.
- Ignition ON, engine OFF.
- Access the PCM and control the VGTDC PID.
- Apply light pressure to the cam follower (tip of the actuator), while commanding the VGT duty cycle and check for the internal valve movement
- Increase the VGT duty cycle to greater than 70%
- Is a concern present?
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KA6 : CHECK THE CHARGE AIR COOLER, AIR INTAKE AND EXHAUST SYSTEMS FOR LEAKS AND RESTRICTIONS
- Ignition OFF.
- Disconnect the hose from the EP sensor.
- Plug the exhaust pipe.
- Connect the Rotunda Smoke Machine, Fuel Evaporative Emission System Tester 218-00001 (522) or equivalent to the EP hose.
- Fill the exhaust system with smoke.
- Pressurize the exhaust system with 20 PSI regulated shop air.
- Disconnect the hose from the MAP sensor.
- Inspect the MAP sensor hose and manifolds for damage, leaks, restrictions, and correct routing.
- Connect the Rotunda Smoke Machine, Fuel Evaporative Emission System Tester 218-00001 (522) or equivalent to the MAP hose.
- Fill the air intake system with smoke.
- Pressurize the air intake system with 20 PSI regulated shop air.
- Check air intake and exhaust systems for leaks.
- Are any leaks or restrictions present?
