Rear Axle Coupling Solenoid Control Circuit
Table of contents
C0393 GMC Possible Causes
- Faulty Rear Axle Coupling Solenoid
- Rear Axle Coupling Solenoid harness is open or shorted
- Rear Axle Coupling Solenoid circuit poor electrical connection
How do I fix code C0393 GMC?
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.
Tech Notes
- – C0393 06: Rear Axle Coupling Solenoid Control Circuit Short to Ground or Open/High Resistance
- – C0393 0B: Rear Axle Coupling Solenoid Control Circuit Current Above Threshold
Cost of diagnosing the C0393 GMC code
The cost of diagnosing the C0393 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.
Possible Symptoms
- Anti-Lock Brake System (ABS) Warning Light ON
- Engine Light ON (or Service Engine Soon Warning Light)
C0393 GMC Description
The rear differential Clutch Control Module (CCM) provides a power and ground switching circuits to the solenoid. The solenoid receives current from the CCM through PWM low side driver, and converts that signal into torque through the clutch to the rear tyres when all wheel drive (AWD) is requested.