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Home >> GMC >> 2000 >> Savana G2500, Van Cargo Extended, 5.0 M >> Repair and Diagnosis >> External Pages >> Different car >> Section 376 (Anti-Lock Brake System) >> Diagnostic Information And Procedures >> DTC C1277: Requested Torque Signal Malfunction; P1571: TCS PWM Circuit No Frequency (W/NW9) >> Conditions for Setting the DTC >> C1277

Conditions for Setting the DTC: C1277

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

The PCM diagnoses the requested torque signal circuit and sends a serial data message to the EBCM indicating a fault is present.

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