4L80-E/4L85-E Automatic Transmission

Scan Tool Data List








Use the Scan Tool Data List under the following conditions:
^ The Diagnostic System Check - Vehicle is complete.
^ The On-Board Diagnostics are functioning properly.
^ No DTC's are present.
The values below represent a typical display recorded from a properly functioning system.

Important: Do not use a scan tool that displays faulty data. Report the condition to the scan tool manufacturer. The use of a faulty scan tool can result in misdiagnosis and the unnecessary replacement of parts.

Only the parameters listed below are used in this manual for diagnosing. If a scan tool displays other parameters, the values are not recommended by General Motors for use in diagnosis.
Scan tool values below were recorded under the following conditions:
^ Engine at idle
^ Upper radiator hose hot
^ Closed throttle
^ Transmission in PARK
^ Closed Loop Operation
^ Accessories OFF
^ Brake pedal not applied