P2162

DTC P2162

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.



DTC Descriptor
DTC P2162 00
- Vehicle Speed Sensor (VSS) Circuit 1-2 Correlation




Diagnostic Fault Information






Circuit/System Description

The vehicle speed signal circuit is an input to the throttle actuator control (TAC) module from the powertrain control module (PCM). The TAC module uses the vehicle speed signal from the PCM in order to determine the vehicle speed. The TAC module then sends a serial data message to the PCM indicating the vehicle speed that the TAC module has detected.


Conditions for Running the DTC

* The vehicle is in Drive or Reverse.
* The vehicle speed is greater than 8 km/h (5 mph).
* There are no VSS DTCs present.
* The ignition voltage is between 9-16 volts.



Conditions for Setting the DTC

* The PCM sends a 8 km/h (5 mph) signal on the vehicle speed signal circuit to the TAC module. The TAC module sends a UART serial data message to the PCM indicating that the vehicle speed is 0 km/h (0 mph).
* The condition must be present for greater than 4 seconds.



Action Taken When the DTC Sets

* The cruise control system is disabled.
* The PCM stores a DTC P2162 in memory.
* The PCM records the operating conditions at the time the DTC sets. The PCM displays the failure information in the Failure Records on the scan tool.



Conditions for Clearing the DTC

* The history DTC clears after 40 malfunction free warm-up cycles.
* The DTC becomes history when the conditions for setting the DTC are no longer present.



Reference Information
Schematic Reference

* Cruise Control Schematics (Electrical Diagrams)
* Engine Controls Schematics (Electrical Diagrams)

Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Cruise Control Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information


Circuit/System Verification

1. Ignition OFF, install a scan tool and raise the vehicle drive wheels. Refer to Lifting and Jacking the Vehicle (Service and Repair).
2. Engine ON, transmission in Drive, verify that DTC P0502 or P0503 are not set as current in the PCM.

• If any of the specified codes are set as current, refer to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code Descriptions).

3. Engine ON, transmission in Drive, verify the scan tool Vehicle Speed Sensor parameter reads any vehicle speed.

• If the scan tool parameter does not read any vehicle speed, replace the PCM.




Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the throttle actuator control (TAC) module.
2. Ignition ON, test for 8.5V between the vehicle speed signal terminal 4 and ground.

• If less than the specified value, test the vehicle speed signal circuit for an open or short to ground. If the circuit tests normal, replace the PCM.


• If greater than the specified value, test the vehicle speed signal circuit for a short to voltage. If the circuit tests normal, replace the PCM.

3. If all circuits test normal, replace the TAC module.



Repair Instructions

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


Control Module References (Programming and Relearning) for PCM or TAC module replacement, setup, and programming