Error Code P0C66: What It Means & What To Do?

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A resolver is a kind of sensor that is utilized to check the placement of the magnetic poles within the rotor of a motor generator. Being familiar with the placement of the poles is absolutely essential for making certain of the exact control of MG2 and MG1. Every resolver is comprised of a stator that occupies an excitation coil and 2 detection coils, S and C. Since the rotor is oval shaped, putting a gap in between the stator and rotor changes as the rotor is turning. A current occurs in turn repeatedly with a well-advanced frequency that streams in past the excitation coil, and detection coils S and C output currents performs in turn repeatedly in a manner conforming to the sensor rotor placement.

The inverter that occupies converter assembly, MG ECU, modifies the complete placement of the rotor in a manner corresponding to the stages of detection coils S and C and their waveform heights. Moreover, the CPU estimates the quantity of the position change in a well-advanced time length, as a way to utilize the resolver in the form of a speed sensor. The MG ECU detects signals output that comes from the motor resolver and checks for function failures.

What causes this problem with the Generator Position Sensor Circuit 'A' Low

• Defective Inverter with converter assembly
• Faltered Hybrid vehicle generator assembly
• Failed Hybrid vehicle motor assembly
• Damaged wire harness or connector

1. Speed Sensor - The motor resolver is a speed sensor that creates a current of waves that signal the complete placement within a single revolution, in which these signals are usually fluctuating with a resolver interface board that energizes a digital signal. You will see that the activity is associated with the speed or position control. The most frequent disruptions that you will see is when the motor is vibrating, speed is rotating differently, engine noises are offset, there is a different accuracy in movement positioning, system positioning is vibrating, positioning is incorrect, and there are unplanned stops in movement. A majority of motor drives and motion/positioning controls exercise a run-time testing of the process within the calculated equipment and they can detect the most common errors and put the motor to a stop. You can find a professional mechanic that can detect the function of resolver and encoder within the motor, so it makes it so much easier to understand the effects of these errors.
2. Connector - Apparent wear or damage is a recurrent symptom of an issue with the motor’s resolver connector. Old cables might dry up and could result in cracks within the insulation. Cables might rub up along a hot manifold or motor part, which cause them to melt or burn up. These kinds of issues may compromise for a cable’s action to a boost power in through the connector. This can result in misfires and other problems with combustion, and in more extreme cases it could even lead to a cable shortage running up against the engine. Since a majority of modern vehicles are being constructed with these motor resolver connectors, which are seen on a large population of highway cars and trucks, they play an essential role in motor performance. As a conclusion, if you surmise that your vehicle could be facing a problem that is related to the motor’s resolver connector, then seek out a professional help with having the car checked out by an experienced mechanic to find out if the connector should be replaced.
3. Converter Assembly - The exact problem with a converter error is possibly the start circuit. There must be a set of capacitors that are momentarily put into the circuit to phase shift the third wire and get the motor to turn on. This is an arrangement of orange wires that are fixed in place, even if they look disconnected, and there must be a black wire, so that a single connection should be visible. The converter usually consists of a contractor, capacitor and a black case that is the potential relay that is mounted onto the motor. Wires can be the result of a hazardous situation, so you have to depend on an experienced mechanic to properly control this entire assemblage of wiring and safely consider where the diagnosis is located.
4. Motor Generator - There might be an error in the generator. A circuit breaker may be opened. There might be a bad connection or an error cord set. A device connection might be be afflicted. If your generator’s motor is operating correctly without any load, but when loads are joined together, then a problem is likely to take place: A connected cord set might have a short circuit. The engine speed may not be fast enough. The generator might have way too much load. The generator circuit could have a short. The filter might be plugged or dirty. If your generator’s engine is incapable of starting, or actually will start, but is running rough, then a crucial problem might come arise: A battery might be failing. Oil might be at a low level. An air filter might be dirty. There could be a loss in fuel. The filter might be clogged or dirty. The fuel could be polluted with water. The engine might be flooded. A spark plug could be running bad. The spark plug wire might be disengaged to the plug. The fuel mixture could be overly rich. The intake valve might be open, closed or sticking. The engine might have lost build up of pressure. The start switch might be put in OFF position. The fuel valve might be put in OFF position. If your generator’s motor is running and suddenly shuts down, then such results could be taken into terms: The fuel filter could be blocked or dirty. The carburetor may be running overly rich or overly lean. If your generator engine starts to fail, then any such causes might be taken into terms: The fuel filter could be plugged or dirty. The carburetor might be running overly lean or overly rich. This is why our team is available to help you repair your motor equipment, and Parts Avatar is on the mission of fixing, repairing, and tuning-up motor generators very effectively.
5. Rotor - Any change that occurs in running conditions can interrupt the performance, dependability, and effectiveness in modern high-quality motors and can result in a failed rotor. Rotors typically fail for two apparent reasons: The start-ups are quite immoderate. In large sized rotors, the cycle of rotor life span is at a resistant order in corresponding to size of the amount of starts. Starting intervals are measured to a longer length than how motor is typically designed. Damaged rotor bars are a result of an outstanding rate, except not all parts, even with failed rotors that are normally detected within the slot section of the rotor. Where the end ring or shorted ring is located, this joins up with the bar. As the bar accesses the core, it breaks up as a result of combined mechanical and electrical pressures. You can find manageable steps to find out if damaged rotor bars are actually procurable within the motor assembly. When critical vibrations or other motor issues are on the scene, it is most susceptible that you should notify an experienced mechanic to conduct a complete inspection of the motor components to find out if there is an issue, even when the motor is largely designed.
6. Detection Coils - A failed detection coil will simply display some recurrent signs mentioned as follows: an unspecified louder than normal motor. There is a visible loss of power in the motor. The motor speed has dropped a great deal when accelerating for no evident reason. There is a blinking or irregular activation in the check engine light. There is an active gas warning light when the cars build up sufficient amount of fuel. The motor is suddenly releasing an irregular blast of smoke, and runs roughly, rather than operate in a smooth flow. In any case, there is a better procedure in inspecting the detection coils inside your vehicle and ensuring they are working correctly as expected. You need to use an ohmmeter to modify the detection coils for a constant stream. Ensure that you have the exact ohm values for the detection coils. To obtain all this data, look up your vehicle’s motor online and buy an efficient manual to help you learn all about the ohms diagnostics for these detection coils, or have an experienced mechanic work this out for you.
7. Motor Resolver - A motor resolver is designed as a vibrating position controller or motor drive that gives a continuity of change in motor positioning or/and motor consistency of acceleration or deceleration, which is normally better to detect when the motor runs low on RPM, and some RPM can generate powerful mechanical back and forth movement at a normal speed. Use the Oscilloscope to detect for a position powered output and motor drive input signal, including a motor voltage and current. This system will survey for a different range in rotating speeds. You might hear strange engine noises coming out of the motor drive frequency or experience a sense of vibrations within the motor position system. So do check mechanical backlashes within the system, as motion-positioning accuracy differs to a degree. When the motor is vibrating, so will the positioning system, which means something critical is happening to the positioning system parameters. As a conclusion, check the position control output to detect for inconsistent positioning, and then visually focus on the motion positioning for further inaccuracies. There may be unexpected stops in movement, so check for failing cables and bad contacts. Persist in detecting the position controller output and motor drive signal, including the motor voltage and current. Electrical estimations have to be managed with the oscilloscope, as signals might come with rapid changes and different frequencies.

Are you eager to learn a few recurrent symptoms of OBD Code P0C66? We have all the advice you need at Parts Avatar. Take a glance at these follow points:

Common Symptoms

• Hot red catalytic converter
• Bad acceleration
• The light stays on or light abnormally as the DPF regenerates. The engine will slow down on acceleration.
• Engine performance will reduce, even at bad RPM levels

Our team as appointed a few good steps that will help you to solve the circumstance of OBD Code P0C66. These are described below in the following points:

• If the fuel shutoff switch and all system circuitry are all inspected, surmise a failed PCM or other associated controller.
• If the PCM checks for an irregularly high exhaust temperature, pressure, and/or noxious gas concentration, the exhaust after treatment fuel injector is initiated and the disinclined compound is spurted into the diesel particulate filter or catalytic converter.
• Many vehicles demand use an electronically controlled valve in the automatic transmission cooler lines to modulate the stream of fluid to the cooler alone.
• Persist in doing this by clearing out the code and running the vehicle to see if it comes back.

Have no need to feel pressured if your vehicle’s OBD Code is still beaming up, as our team is available to give you the best service ever. Take a glance at our supreme range of Rotor, Speed Sensor, Motor Generator, Motor Resolver, Assembly Converter, Detection Coils and so much more. This way all your concerns will go away in a flash.

If you desire to simply diagnose this error code, all you must do is go through these handy steps that are described as follows:

If you hear a clicking sound when you are trying to start the engine, but the engine is not cranking,
this is usually a sign that an incident is not going right with the battery, for instance a poor or dejected battery or damaged or hanging battery cables. If trying to start the car and the engine is cranking, but is failing in turning over, this could signal an issue regarding the fuel or ignition. Other recurrent results of an engine failing to start come as a failing starter motor relay, a plugged fuel filter, a failed fuel pump or a failed ignition switch. Automotive parts are not considered replaceable in referral to just a P0C66 DTC. The vehicle service manual has to be advised for further data on probably results of the error, following with the needed modification.

Common Mistakes When Diagnosing the P0C66 Code

• Failed interior engine
• Failed interior transmission
• Need to update Transmission Control Module (TCM) software
• Wiring Problem