U05AA RAM - Implausible Data Received From Charge Air Cooler Coolant Pump
U05AA RAM Possible Causes
- Faulty Auxiliary Coolant Pump
- Auxiliary Coolant Pump harness is open or shorted
- Auxiliary Coolant Pump circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
How is the U05AA RAM code repair?Start by checking 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.
What is the cost to diagnose the U05AA RAM code
Labor: 1.0The cost to diagnose the U05AA RAM code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
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- Engine Light ON (or Service Engine Soon Warning Light)
U05AA RAM MeaningTo improve engine performance the Charge Air Cooler (CAC) system is used to reduce the temperature of the air entering the combustion chambers. The temperature increase of the air entering engine is caused by the Turbocharger. The Low Temp Cooling system consists of an electric CAC Pump, Charge Air Cooler, Coolant Reservoir, Charge Air Cooler Radiator, Charge Air Cooler Coolant Temperature Sensor and plumbing. The Low Temp Cooling system operates independent of the vehicle's primary cooling system.
The Auxiliary Coolant Pump is a smart device that contains a LIN Bus communication module and a coolant pump. To maintain a desired charge air temperature, the PCM sends a pump speed command over the LIN bus to the internal Auxiliary Coolant Pump. The internal Auxiliary Coolant Pump module controls the pump speed/coolant flow rate using Pulse-Width Modulation (PWM). The Auxiliary Coolant Pump assembly monitors for internal system circuit and performance failures. If a fault occurs the Auxiliary Coolant Pump module sends the fault information to the PCM through the dedicated LIN Bus. The PCM processes the information received, then sets the correlating fault.
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