P2162
DTC P2162
CIRCUIT DESCRIPTION
The vehicle speed signal circuit is an input to the throttle actuator control (TAC) module from the powertrain control module (PCM). The PCM provides a constant voltage signal on the vehicle speed signal circuit. The PCM creates the vehicle speed signal by internally pulsing the vehicle speed signal to ground. The TAC module uses the vehicle speed signal from the PCM, in order to determine the vehicle speed. The TAC module then sends a universal asynchronous receiver transmitter (UART) serial data message to the PCM indicating the vehicle speed that the TAC module has detected.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P2162 Vehicle Speed Sensor (VSS) Circuit 1-2 Correlation
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 in the PCM.
- 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.
- The PCM receives the clear code command from the scan tool.
DIAGNOSTIC AIDS
For intermittent diagnosis, refer to Testing for Intermittent Conditions and Poor Connections in Diagnostic Aids. Component Tests and General Diagnostics
TEST
