Diagnostic Instructions
DTC Descriptor
DTC P2162: Vehicle Speed Sensor (VSS) Circuit 1-2 Correlation
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 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. |
Actions Taken When the DTC Sets
| • | The malfunction indicator lamp (MIL) will not illuminate. |
| • | The cruise control system is disabled. |
Conditions for Clearing the DTC
| • | The condition responsible for setting the DTC no longer exists. |
| • | A history DTC will clear after 40 malfunction-free ignition cycles have occurred. |
Reference Information
Schematic Reference
Cruise Control Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Cruise Control Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the TAC module.
- Ignition ON, test for 8.0-9.0 volts between the signal circuit terminal 4 and ground.
| ⇒ | If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the PCM. |
| ⇒ | If less than the specified value, test the signal circuit for a short to ground
or an open/high resistance. If the circuit tests normal, replace the PCM. |
- If all circuits test normal, replace the TAC module.
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for PCM or TAC module replacement, setup, and programming
