2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1812

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1812

Diagnosis (Without Special Tool) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component

Tests and General Diagnostics/Alcohol/Contaminants-in-Fuel Diagnosis (Without Special Tool)).

* Lean fuel injectors-Refer to Fuel Injector Solenoid Coil Test (LAU) (See: Powertrain Management/Fuel Delivery and Air

Induction/Fuel Injector/Testing and Inspection/Fuel Injector Solenoid Coil Test)Fuel Injector Solenoid Coil Test (LF1, LFW) (See:

Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and Inspection/Fuel Injector Solenoid Coil Test).

瀚慖f you find any of the above conditions, repair as necessary.

Warning: Refer to Road Test Warning (See: Service Precautions/Technician Safety Information/Road Test Warning).

Note: The rear heated oxygen sensor (HO2S) must be in Closed Loop for this diagnostic to run. A road load condition is necessary to obtain

Closed Loop.

3. 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.

Repair Instructions

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

P2101

DTC P0638, P2100-P2103, or P2119 (Without 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 P0638

- Throttle Actuator Control (TAC) Command Performance

DTC P2100

- Throttle Actuator Control (TAC) Motor Control Circuit

DTC P2101

- Throttle Actuator Position Performance

DTC P2102

- Throttle Actuator Control (TAC) Motor Control Circuit Low Voltage

DTC P2103

- Throttle Actuator Control (TAC) Motor Control Circuit High Voltage

DTC P2119

- Throttle Closed Position Performance

Diagnostic Fault Information

Circuit/System Description

The Engine Control Module (ECM) controls the throttle valve by applying a varying voltage to the control circuits of the throttle actuator control

(TAC) motor. The ECM monitors the duty cycle that is required to actuate the throttle valve. The ECM monitors the throttle position sensors 1 and

2 to determine the actual throttle valve position.

Conditions for Running the DTCs