2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1396

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1396

6. 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.

瀚慖f the DTC resets, replace the ECM.

Repair Instructions

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

* ECM or TCM-Refer to Control Module References (See: Testing and Inspection/Programming and Relearning) for replacement, setup and

programming.

* Perform the Transmission Adaptive Functions (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/AF40-6 - Automatic Transmission/Transmission Adaptive Functions).

P0503

DTC P0501 or P0503

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 P0501

- Vehicle Speed Sensor Performance

DTC P0503

- Vehicle Speed Sensor Circuit Intermittent

Circuit/System Description

The transmission control module (TCM) provides the engine control module (ECM) vehicle speed information through the high-speed

communication on the controller area network (CAN). Vehicle speed is produced by the alternating current (AC) generated through the

transmission output shaft speed (OSS) sensor as the output shaft rotates. The ECM continuously monitors the vehicle speed signal supplied by the

TCM.

Conditions for Running the DTC

* Engine coolant temperature is more than 39.8掳C (104掳F).

* No engine coolant temperature DTC is set.

* No engine speed sensor DTC is set.

* The DTCs run continuously once the above condition is met.

Conditions for Setting the DTC

P0501

The ECM detects the CAN signal is not valid for more than 2 s.

P0503

The ECM detects the vehicle speed is greater than 275 km/h (171 MPH) for more than 0.2 s.

Action Taken When the DTC Sets

* DTC P0501 is a Type C DTC.

* DTC P0503 is a Type B DTC.

Conditions for Clearing the DTC

* DTC P0501 is a Type C DTC.

* DTC P0503 is a Type B DTC.