2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1950

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1950

DTC P0120, P0122, P0123, P0220, P0222, P0223, or P2135

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 P0120

- Throttle Position (TP) Sensor 1 Circuit

DTC P0122

- Throttle Position (TP) Sensor 1 Circuit Low Voltage

DTC P0123

- Throttle Position (TP) Sensor 1 Circuit High Voltage

DTC P0220

- Throttle Position (TP) Sensor 2 Circuit

DTC P0222

- Throttle Position (TP) Sensor 2 Circuit Low Voltage

DTC P0223

- Throttle Position (TP) Sensor 2 Circuit High Voltage

DTC P2135

- Throttle Position (TP) Sensor 1-2 Correlation

Diagnostic Fault Information

Typical Scan Tool Data

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1161

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1161

P0122

The ECM detects the throttle position sensor 1 signal voltage is less than 0.18 V for greater than 1 s or a cumulative of 4 s.

P0123

The ECM detects the throttle position sensor 1 signal voltage is greater than 4.6 V for greater than 1 s or a cumulative of 4 s.

P0221

The throttle position sensor 2 disagrees greater than 9 % from throttle position sensor 1, or throttle position sensor 2 disagrees greater than 9 %

from the predicted value for greater than 1 s or a cumulative of 4 s.

P0222

The ECM detects the throttle position sensor 2 signal voltage is less than 0.16 V for greater than 1 s or a cumulative of 4 s.

P0223

The ECM detects the throttle position sensor 2 signal voltage is greater than 4.9 V for greater than 1 s or a cumulative of 4 s.

Action Taken When the DTC Sets

* DTCs P0121 and P0221 are Type B DTCs.

* DTCs P0122, P0123, P0222, and P0223 are Type A DTCs.

Conditions for Clearing the DTC

* DTCs P0121 and P0221 are Type B DTCs.

* DTCs P0122, P0123, P0222, and P0223 are Type A DTCs.

Diagnostic Aids

If there is a condition with the throttle position sensors, the ECM defaults to reduced power mode for the entire ignition cycle, even if the condition

is corrected.

Reference Information

Schematic Reference

Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics

(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Throttle Actuator Control (TAC) System Description (See: Powertrain Management/Computers and Control Systems/Description and

Operation/Throttle Actuator Control (TAC) System Description)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification