2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 370

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 370

瀚慖f not within the specified range, replace the S90 sunroof sunshade switch.

4. Test for 96-100 ohm between the signal terminal 1 and the low reference circuit terminal 4 while pressing the express open switch.

瀚慖f not within the specified range, replace the S90 sunroof sunshade switch.

5. Test for 1.7-1.8k ohm between the signal terminal 1 and the low reference circuit terminal 4 while pressing the close switch.

瀚慖f not within the specified range, replace the S90 sunroof sunshade switch.

6. Test for 930-940 ohm between the signal terminal 1 and the low reference circuit terminal 4 while pressing the express close switch.

瀚慖f not within the specified range, replace the S90 sunroof sunshade switch.

Repair Instructions

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

* Sunroof Switch Replacement (See: Body and Frame/Roof and Associated Components/Sunroof / Moonroof/Sunroof / Moonroof

Switch/Service and Repair)

* Sunroof Sunshade Motor Replacement (See: Body and Frame/Roof and Associated Components/Sunroof / Moonroof/Sun Shade/Service

and Repair/Sunroof Sunshade Motor Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning)for sunshade motor/actuator replacement, setup and

programming

B369D

DTC B369D

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 B369D 00

- Sunroof Sunshade Actuator Malfunction

DTC B369D 39

- Sunroof Sunshade Actuator Internal Malfunction

DTC B369D 42

- Sunroof Sunshade Actuator Calibration Not Programmed

DTC B369D 4B

- Sunroof Sunshade Actuator Calibration Not Learned

Circuit/System Description

The sunshade is controlled by its own integrated motor/controller containing the necessary electronics, motor, hall effect position sensors, as well as

the interface to the driver control switches. The motor/controller is capable of controlling motion based on control switch activation and LIN-Bus

message commands from the body control module (BCM).

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

B369D 00

The sunshade module has detected and reported via the LIN-Bus that the sunshade actuator has an malfunction.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1009

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1009

瀚慖f not within the specified range, replace the B52 Heated Oxygen Sensor.

Repair Instructions

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

* Heated Oxygen Sensor Replacement - Sensor 1 (LAU) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Sensor 1)

* Heated Oxygen Sensor Replacement - Sensor 2 (LAU) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Sensor 2)

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

programming

P0038

DTC P0030, P0031, P0032, P0036, P0037, or P0038 (Without LF1)

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 P0030

- HO2S Heater Control Circuit Sensor 1

DTC P0031

- HO2S Heater Control Circuit Low Voltage Sensor 1

DTC P0032

- HO2S Heater Control Circuit High Voltage Sensor 1

DTC P0036

- Heater Control Circuit Sensor 2

DTC P0037

- HO2S Heater Control Circuit Low Voltage Sensor 2

DTC P0038

- HO2S Heater Control Circuit High Voltage Sensor 2

Diagnostic Fault Information

Circuit Description

The heated oxygen sensor (HO2S) heater reduces the time required for the oxygen sensor to reach operating temperature and maintains the

operating temperature during extended idle periods. When the ignition is turned to the ON position, ignition voltage is supplied directly to the

sensor heater. The Engine Control Module (ECM) controls the heater operation by first modulating the control circuit to ground when the sensors

are cold. This prevents the possibility of thermal shock to the sensor, from condensation build-up on the sensor, by controlling the sensors rate of

heating. After a predetermined amount of time, the ECM commands the heaters ON continuously. Once the sensor reaches operating temperature,

the ECM may modulate the heater control circuit to ground, to maintain a desired temperature.

The ECM controls the heater by grounding the control circuit with a solid state device called a driver. The driver is equipped with a feedback

circuit that is pulled-up to voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring

the feedback voltage.

Conditions for Running the DTC

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1001

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1001

瀚慖f not within the specified range, replace the Q40 turbocharger bypass solenoid valve.

3. Test for infinite resistance between each terminal and the Q40 turbocharger bypass solenoid valve housing.

瀚慖f not the specified value, replace the Q40 turbocharger bypass solenoid valve.

Repair Instructions

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

* Turbocharger Disassemble (See: Engine, Cooling and Exhaust/Engine/Service and Repair/Overhaul/101. Turbocharger Disassemble)

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

programming

P0035

DTC P0033-P0035

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 P0033

- Turbocharger Bypass Solenoid Valve Control Circuit

DTC P0034

- Turbocharger Bypass Solenoid Valve Control Circuit Low Voltage

DTC P0035

- Turbocharger Bypass Solenoid Valve Control Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The turbocharger bypass solenoid valve is used to prevent the turbo from exceeding the pump limit at low flow and high pressure. This occurs

when the engine is running with a load and the throttle suddenly closes. In this case, flow is almost null and pressure is very high. This not only is

damaging to the turbocharger, but also generates noise and decelerates turbine speed. Ignition voltage is supplied directly to the bypass solenoid

valve and the engine control module (ECM) controls the valve by grounding the control circuit with a solid state device called a driver. The driver

is equipped with a feedback circuit that is pulled-up to a voltage. The ECM can determine if the control circuit is open, shorted to ground, or

shorted to a voltage by monitoring the feedback voltage.

Conditions for Running the DTC

* The engine speed is greater than 80 RPM.

* The ignition voltage is between 10-18 V.

* The ECM has commanded the bypass solenoid valve ON and OFF at least once during the ignition cycle.

* The DTCs run continuously once the above conditions are met.

Conditions for Setting the DTC