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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 102 (Automatic Transmission Diagnosis - 4L60-E) >> Diagnostic Tests >> DTC P0758: 2-3 Shift Solenoid Circuit - Electrical Malfunction >> Circuit Description

Circuit Description

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The 2-3 shift solenoid valve is used to control fluid flow acting on 2-3 shift valves. Solenoid is a normally open exhaust valve used in conjunction with 1-2 shift solenoid valve to allow 4 different shifting combinations. See SHIFT SOLENOID COMBINATIONS & GEAR RATIO  table under DTC P0753: 1-2 SHIFT SOLENOID CIRCUIT - ELECTRICAL MALFUNCTION. Solenoid is attached to control valve body. Ignition voltage is supplied directly to solenoid through fused circuit. PCM commands solenoid on or off through ground circuit. DTC P0758 is set if PCM detects a continuous open, short to ground or short to voltage in 2-3 shift solenoid circuit.

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