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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 73 (Automatic Transmission Diagnosis - 4L80-E (Gasoline)) >> Diagnostic Tests >> DTC P0713: Transmission Fluid Temperature Sensor Circuit - High Input >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 GMC Cab & Chassis Sierra and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers listed below refer to step numbers in the diagnostic procedure:

  1. 4

    This step tests for higher than normal circuit voltage which may also damage the TFT sensor.

  2. 6

    This step simulates a TFT sensor DTC P0712. If the PCM recognizes the low signal voltage, high temperature, and the scan tool displays 295°F (146°C) or greater, the PCM and the wiring are okay.

  3. 7

    This step verifies a condition in the TFT sensor circuit inside the transmission.

  4. 8

    This step inspects the TFT sensor and the transmission internal wiring harness assembly for an open. Low reference circuit 407 becomes circuit 452 inside the transmission.

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