GM Service Manual Online
For 1990-2009 cars only

The Transmission Scan Tool Data List contains all Transmission related parameters that are available on the scan tool. The list is arranged in alphabetical order.

Use the Transmission Scan Tool Data List only after performing the following inspections:

    • Powertrain On-Board Diagnostic System Check is completed.
    • No Diagnostic Trouble Codes (DTCs) are present.
    • On-board diagnostics are functioning properly.

Scan tool values from a properly running Transmission may be used for comparison with the Transmission you are diagnosing. The Transmission Scan Tool Data List represents values that would be seen on a normal running engine.

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

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Engine Idling/Upper Radiator Hose Hot/Closed Throttle/Transmission in Park or Neutral/Closed Loop

4WD Low

Transmission Data

Enabledor Disabled

Disabled

Brake Switch

Engine Data

OPEN/CLOSED

RELEASED

Current Gear

Transmission Data

1st

1st

ECT

Engine Data

C°/F°

80-90°C / 176-194°F

Engine Load

Engine Data

%

10 to 30%

Engine Speed

Engine Data

RPM

844 to 900 RPM

Mode Select Switch

Engine Data

ON/POWER

POWER

Monitor Shift Sol. 1

Transmission Data

On/Off

ON

Monitor Shift Sol. 2

Transmission Data

On/Off

Off

Monitor Shift TCC Solenoid

Transmission Data

ON/OFF

OFF

Overdrive Switch

Transmission Data

ON/OFF

ON

Shift Solenoid 1

Transmission Data

On/Off

ON

Shift Solenoid 2

Transmission Data

On/Off

Off

Spark

Engine Data

Degrees

12-16°

TCC Solenoid

Transmission Data

ON/OFF

OFF

Throttle Position Level

Engine Data

0

0

Transmission Range

Transmission Data

Park

Park

Vehicle Speed

Engine Data

km/h/MPH

0 km/h