C1276 — Delivered Torque Signal Circuit Malfunction

Causes

• Damaged, chafed, or pinched wiring in the delivered torque signal circuit
• Corroded, loose, or contaminated connector at sensor/module
• Open or short to ground/power in the harness
• Faulty torque sensor, torque request module, or delivering control module
• Blown fuse or poor power/ground to the controlling module
• Intermittent connection due to vibration or water intrusion

Symptoms

• Malfunction Indicator Light (MIL) or ABS/Traction/Stability warning lamp illuminates
• Reduced traction/stability control function or limited drivability
• Unexpected torque reduction or limp/limited power mode
• Intermittent faults or drivability complaints under load
• Related modules may log additional communication or torque-related faults

What to check

• Read all stored/active codes and freeze frame data with a capable scan tool
• Check for related U‑codes (loss of communications) that may indicate module issues
• Visually inspect wiring and connectors along the delivered torque signal circuit for damage, corrosion, or loose pins
• Inspect module power and ground circuits and verify corresponding fuses
• Backprobe the signal connector and monitor live data while operating the vehicle (or simulating torque request)
• Wiggle test wiring while monitoring signal to reproduce intermittent faults

Signal parameters

• Signal type: typically a low voltage analog or pulse (PWM) torque/discrete signal from a torque/torque-request sensor or module
• Reference voltage: usually derived from module reference (commonly ~5 V); confirm with factory data
• Idle/nominal signal: will show a steady voltage or duty cycle that changes with torque request; should not be open or hard shorted to battery/ground
• Short to ground: signal reads ~0 V; short to battery: signal reads near battery voltage; open circuit: no continuity
• For accurate expected voltage, duty cycle, or frequency values, consult OEM wiring diagrams and service specifications

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