P1AC2 GMC - Starter/Generator Control Module Cooling Fan Relay Control Circuit High Voltage

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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P1AC2 GMC Possible Causes

  • Faulty Starter/Generator Control Module Cooling Fan Relay
  • Starter/Generator Control Module Cooling Fan Relay harness is open or shorted
  • Starter/Generator Control Module Cooling Fan Relay circuit poor electrical connection

First diagnose P1AC2 GMC code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the P1AC2 GMC code

    Labor: 1.0

    The cost of diagnosing the P1AC2 GMC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

P1AC2 GMC Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1ac2 Gmc Description

The Starter/Generator Control Module (SGCM) controls the coolant fan operation by applying voltage to the coolant fan relay control circuit with an internal solid state device called a driver. When the SGCM is commanding the relay ON, the voltage of the control circuit should be low, near 0 volts. When the SGCM is commanding the relay OFF, the voltage potential of the control circuit should be high, near 12 volts.
The SGCM monitors the relay control circuits for the following conditions:
- Short to ground
- Short to voltage
An open circuit
If the SGCM detects an improper voltage level on the coolant fan relay control circuit, then DTC P1AC1 or P1AC2 will set and the driver will be disabled.
OBDII Code P1ac2 Gmc - Starter/Generator Control Module Cooling Fan Relay Control Circuit High Voltage - AutoCodes.com

P1AC2 GMC More Information

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