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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 71 (Automatic Transaxle (DTC P1822 To DTC P2764)) >> Diagnosis >> DTC P2761 (3.8L) >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

Ignition voltage is provided to the torque converter clutch pulse width modulation (TCC PWM) solenoid valve. The powertrain control module (PCM) controls the solenoid with a negative duty cycle in order to control application and release of the TCC. When the solenoid is commanded OFF, the PCM senses high voltage. When the solenoid is commanded ON, the PCM senses low voltage.

If the PCM detects a continuous open, short to ground or short to voltage in the TCC PWM valve circuit, then DTC P2761 sets. DTC P2761 is a type B DTC.

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