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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1373 (Automatic Transmission - ALLISON - DTC P0218 To DTC P0878) >> DTC P0711 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: You must perform the Circuit/System Verification first.
  1. Ignition OFF, disconnect the X175 harness connector at the transmission.
  2. Ignition ON, engine OFF, connect a 3A fused jumper wire to the TFT signal circuit terminal pin G, to TFT low reference circuit terminal H. Verify with a scan tool that the Trans. Fluid Temp. parameter changes from -40°C (-40°F) to 160°C (320°F).
    • If not the specified value, test the TFT signal circuit and low reference circuit for a short to voltage, short to ground or an open/high resistance. If circuits test normal, replace the TCM.
  3. Remove the transmission oil pan. Refer to Oil Pan Replacement .
  4. Test the transmission internal TFT signal and low reference circuits for a short to voltage, short to ground or and open/high resistance.
    • If circuits test normal, test or replace the pressure switch manifold.
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