2010 Cadillac CTS Sedan AWD V6-3.0L Page 1826

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1826

Circuit/System Verification

1. Start the engine. Rapidly move the accelerator pedal from the rest position, to wide open throttle position, back to the rest position. Repeat

the procedure a few times. DTC P2105 should not set.

2. 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. Ignition OFF, remove the fuse that supplies voltage to terminal 5-X2 of the ECM. Verify the fuse is OK.

Note: This DTC will only set if the fuse is open and the circuits are not grounded. The ignition voltage circuits must be tested thoroughly for

an intermittent short to ground.

瀚慖f the fuse is open, test the ignition voltage circuit between the open fuse and the ECM for an intermittent short to ground.

2. Install the fuse.

3. Disconnect the harness connectors of the ECM.

4. Ignition ON, load test for B+ on the ignition circuit terminal 5-X2 of the ECM connector.

瀚慖f less than B+, repair the ignition circuit for an open/high resistance.

5. If all circuits/connections test OK, replace the ECM.

Repair Instructions

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

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

programming

P2119

DTC P1516, P2101, P2119, or P2176 (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 P1516

- Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance

DTC P2101

- Throttle Actuator Position Performance

DTC P2119

- Throttle Closed Position Performance

DTC P2176

- Minimum Throttle Position Not Learned

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