P0C77 - OBD Trouble Code

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Error code P0C77? Don’t know how to treat the error code P0C77? Well, here we have written all that you need to know about the error code. It should be noted that the inverter installed has a three-phase bridge circuit that comprises of six power transistors (IGBTs) that are each for MG1 and MG2. For generator (MG1) and motor (MG2) the inverter converts high-voltage direct current from the HV battery into three-phase alternating current. Also, it alters three-phase alternating current transmitted by generator (MG1) and motor (MG2) into direct current for the HV battery. The actuation of the power transistors (IGBTs) is regulated by the MG ECU. The MG ECU receives the important information (required for control) such as amperage and voltage from the inverter. There are two voltage contractors that act like switches for the voltage battery and also controls the high voltage system. Both the switches are open when the vehicle is turned off. It can be observed that whenever the vehicle is turned on, the first switch (pre-charge switch) closes enabling the high voltage to start powering up rest of the vehicle. The code P0C77 sets in when the first switch fails to function in order.

Two high voltage contractors that also function like switches for the high voltage battery are also the controls for the high voltage system. At the time when the vehicle is off, both switches are open. On turning the vehicle on, the first switch which is better known as the Pre-charge Switch closes, thereby allowing the high voltage to begin the process of powering up the rest of the vehicle. On the failure of the first switch to to operate properly, the code P0C77 is stored.

What causes this problem with the Hybrid Battery System Precharge Time Too Short?

• A faulty inverter with converter assembly
• The inverter with converter assembly harness open or burnt
• The inverter with converter assembly circuit having a weak electrical connection
• A defective power management control ECU

1. Converter Assembly - Want to fight the problems caused by the error code P0C77? An inferior quality converter assembly can always be hazardous for the system also it is one of the primal causes behind the occurring of the error code P0C77. In addition to this, it can cause problems like overheating, misfiring and loss of during acceleration. Tune into Parts Avatar for supreme quality converter assembly at economical prices.
2. Converter Assembly Harness - A burnt or loose converter assembly harness can be troublesome. One may encounter problems with the overall functioning of the vehicle. So we recommend you to change it as soon as possible to overcome these problems caused by the error code P0C77.
3. Converter Assembly Circuit - Consequences of a bad converter assembly circuit include shuddering, slipping, high stall speeds or unusual noises. It is advised to get yours fixed right away in order to avoid a problematic system. Tune into Parts Avatar for superior quality products offered at the prices you have always been looking for.
4. Control ECU - The control ECU plays a crucial role in vehicles (especially the newer vehicles). Problems with engine’s functionality and overall drivability are common. Other than this the driver may frequently observe an illuminated check engine light, engine stalling or slow engine cranks and difficulty in starting the vehicle too. Tune into Parts Avatar if you wish to repair or replace your products just in the right time.

Willing to know some common symptoms of OBD Code P0C77? Your wish is our demand. Have a look at them below:

Common Symptoms

• The engine light blinking (or service engine soon warning light)

We have listed out so ways which would help you to correct the occurrence of OBD Code P0C77. They are mentioned here as follows:

• Repair or replace a faulty inverter with converter assembly instantly
• Perform steps to correct a damaged power management control ECU
• Restore or mend a poor electrical connection running in the inverter with converter assembly circuit
• It is recommended to fix any corroded or open inverter with converter assembly harness

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of converter assembly, converter assembly harness, converter assembly circuit, control ECU, hybrid system parts, assembly converter and many more. Now all your problems would vanish within no time.

Here are some steps which you should follow in order to diagnose this fault code P0C77:

The first step that the mechanic should perform should be utilizing a scanner (or code reader) and a digital volt/ohmmeter as these will be helpful in successfully diagnosing this code-storing condition. Next, it is essential to your diagnose with a visual inspection of system wiring, connectors, and components. It is recommended to restore or mend any open, shorted, damaged, or corroded items as required and retest the system to make sure that repairs were successful. If the system wiring, connectors, and components appear to be in normal working order, connect the scanner to the diagnostic connector and record all stored trouble codes and freeze frame data. Also, repair or replace system circuits/connectors as required and retest the system to ensure that repairs were successful.

Common Mistakes When Diagnosing the P0C77 Code

For the convenience of our customers we have listed here a few common mistakes that should be avoided while performing an accurate diagnosis:

• A fault in the pre-charge contractor
• A damaged starter/generator control module
• Wiring complications