Circuit/System Verification

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON. Engine OFF. Transmission in Park.
Verify that the Transmission Fluid Pressure Switch 3 scan tool parameter displays HIGH.
- If the parameter does NOT display HIGH
  Refer to Circuit/System Testing.
- If the parameter does display HIGH
Using the S3 Transmission Shift Lever, shift the transmission to Low.
While monitoring the Transmission Fluid Pressure Switch 3 parameter, accelerate the vehicle to 60 km/h (37 mph). Maintain that speed for at least 15 s with the Calculated Throttle Position parameter displaying less than 20%.
Verify that the Transmission Fluid Pressure Switch 3 parameter continues to display High.
- If the parameter does NOT display High
  Refer to Circuit/System Testing.
- If the parameter does display High
Stop the vehicle.
Using the S3 Transmission Shift Lever, shift the transmission to Drive.
While monitoring the Transmission Fluid Pressure Switch 3 parameter, accelerate the vehicle to 60 km/h (37 mph). Maintain that speed for at least 15 s with the Calculated Throttle Position parameter displaying less than 20%.
Verify that the Transmission Fluid Pressure Switch 3 scan tool parameter displays LOW.
- If the parameter does NOT display LOW
  Refer to Circuit/System Testing.
- If the parameter does display LOW
Verify DTC P0871 is only set as a history DTC.
- If the DTC is set as current
  Refer to Circuit/System Testing.
- If the DTC is only set as history
  Refer to:Testing for Intermittent Conditions and Poor Connections
Clear DTC P0871 from history.
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data. The DTC should not set.
- If the DTC sets
  Refer to Circuit/System Testing.
- If the DTC does not set
All OK.