C 2500 Truck 2WD V8-5.7L VIN R (1997)
Diagnostic Chart
Test Description
Tools Required
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J 39775 4L6OE Jumper Harness
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J 39200 Digital Multimeter
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J 35616 Connector Test Adapter Kit
Important: Whenever the transmission 20-way connector is disconnected and the engine is running, multiple DTCs will set. Be sure to clear these codes
when you are finished with this procedure.
Important: This procedure tests the Automatic Transmission Fluid Pressure Manual Valve Position Switch (TFP Val. Position Sw.) circuits and the
Automatic Transmission Fluid Temperature (TFT) Sensor circuit. Do not use this procedure to test other Automatic Transmission circuits, refer to
4L60-E Automatic Transmission Internal Wiring Harness Check.See: Testing and Inspection
