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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 87 (Automatic Transmission Diagnosis - ALLISON) >> Diagnostic Tests >> DTC P1571: TCM Torque Request Circuit (8.1L) >> Circuit Description

Circuit Description

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The Transmission Control Module (TCM) sends a signal to the Powertrain Control Module (PCM) on the requested torque signal circuit (463). This signal commands the PCM to limit engine torque under certain extreme driving conditions. If a fault is detected on the circuit, DTC will set.

This is a type "B" DTC.

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