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Home >> Pontiac >> 2006 >> Vibe Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Automatic Transmission - Mu4 - Service, Removal & Installation, Troubleshooting & Diagnostics) >> Diagnostic Information and Procedures >> DTC P0977 >> Circuit Description

Circuit Description

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The shift solenoid valve #2 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 overdrive (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 open circuit in the shift solenoid valve #2 circuit, then DTC P0974 sets. DTC P0974 is a type B DTC.

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