2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1163

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1163

P0223

DTC P0121-P0123 or P0221-P0223 (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 P0121

- Throttle Position Sensor 1 Performance

DTC P0122

- Throttle Position Sensor 1 Circuit Low Voltage

DTC P0123

- Throttle Position Sensor 1 Circuit High Voltage

DTC P0221

- Throttle Position Sensor 2 Performance

DTC P0222

- Throttle Position Sensor 2 Circuit Low Voltage

DTC P0223

- Throttle Position Sensor 2 Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The throttle body assembly contains 2 throttle position sensors. The throttle position sensors are mounted to the throttle body assembly and are not

serviceable. The throttle position sensors provide a signal voltage that changes relative to throttle blade angle. The engine control module (ECM)

supplies the throttle position sensors with a common 5 V reference circuit , a common low reference circuit, and two independent signal circuits.

The throttle position sensors have opposite functionality. Throttle position sensor 1 signal voltage decreases from greater than 4 V at idle to less

than 1 V at wide open throttle (WOT). Throttle position sensor 2 signal voltage increases from less than 1 V at idle to greater than 4 V at WOT.