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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1327 (Automatic Transmission - Mu4 (Introduction, Service & Replacement)) >> Diagnostic Information and Procedures >> DTC P0973 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

The shift solenoid valve #1 is located in the control valve body of the transmission. The Powertrain Control Module (PCM) selects the required gear by turning the appropriate solenoid ON or OFF, enabling the transmission to shift.

Shifting from 1st to O/D is performed in combination with the PCM controlling the ON and OFF switching functions of the shift solenoids. If an open or short to ground occurs in either of the solenoid valves, the PCM controls the remaining functioning shift solenoid valve to allow the vehicle to be operated smoothly in a fail safe mode.

When the PCM detects a continuous short to ground in the shift solenoid valve #1 circuit, then DTC P0973 sets. DTC P0973 is a type B DTC.

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