2010 Cadillac Truck SRX FWD V6-3.0L Page 1384

2010 Cadillac Truck SRX FWD V6-3.0L Page 1384

6. Determine the current vehicle testing altitude. Observe the scan tool Boost Pressure Sensor, and BARO Sensor parameters. Compare the

parameters to each other and to the Altitude Versus Barometric Pressure (See: Powertrain Management/Computers and Control

Systems/Specifications/Altitude Versus Barometric Pressure) table. The parameters should be within the range specified in the table and

within 2 kPa of each other.

7. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Verify the integrity of the entire air induction system including all turbocharger components by inspecting for the following conditions:

* Any damaged components, including the turbocharger, the charge air cooler, and the turbo charger wastegate actuator solenoid valve

* Damage to the intake air pressure and temperature sensor

* Loose or improper installation

* An air flow restriction

* Any vacuum leaks

* Any pinholes or breaks in the vacuum hoses attached to the turbocharger wastegate solenoid valve

* Any restrictions in the vacuum hoses attached to the turbocharger wastegate solenoid valve

* Improper routing or connecting of the vacuum hoses on the turbocharger bypass solenoid valve , the bypass valve, and the turbocharger

wastegate actuator solenoid valve

* Any type of air leak between the turbocharger and the throttle body, including the charge air cooler.

* Exhaust leaks

瀚慖f a condition is found, repair as necessary.

2. Ignition OFF, remove B65 intake air pressure and temperature sensor but leave the electrical connector connected.

3. Connect the J 24460-01 - Cooling System Pressure Tester to the intake air pressure and temperature, boost pressure, sensor port with a

suitable adapter. Engine running, observe the scan tool Boost Pressure Sensor parameter. Apply 6 psi to the B65 intake air pressure and

temperature, boost pressure, sensor. Verify the scan tool Boost Pressure Sensor parameter responds to the applied pressure.

瀚慖f the scan tool Boost Pressure Sensor parameter does not increase with the applied pressure, replace the B65 intake air pressure and

temperature sensor.

4. Inspect the turbocharger oil supply lines for a restriction.

瀚慖f restricted, repair or replace as necessary.

5. If all other components test normal, test or replace the turbocharger.

Repair Instructions

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

* Turbocharger Pressure Sensor Replacement () for intake air pressure and temperature sensor replacement.

* Turbocharger Removal ()

* Turbocharger Disassemble ()

* Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement, setup, and

programming

P0300

DTC P0300-P0306 (LF1, LFW)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0300

- Engine Misfire Detected

DTC P0301

- Cylinder 1 Misfire Detected