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Test Description Cadillac Escalade GMT800

Automatic Transmission - 4l60-e/4l65-e (Service & Replacement) 4 illustrations

Test Description

The numbers below refer to the step numbers on the diagnostic table.

Scheme 256

Scheme 256: Test Description
Scheme 256: Test Description
  1. This step determines if the scan tool is receiving power through the DLC connector.
  2. The MIL should illuminate whenever the ignition is ON and the engine is not running.
  3. This step determines if the PCM is transmitting class 2 serial data to the DLC and that the class 2 data circuit is not open or shorted.
  4. This step determines if a DTC is current or stored in history.

Scheme 257

Scheme 257: Scan Tool Output Controls
Scheme 257: Scan Tool Output Controls

Scheme 258

Scheme 258
Scheme 258

Scheme 259

Scheme 259
Scheme 259