Ошибка p3100 toyota

A rebuild from a right front collision. Inverter went back into strut tower and high voltage wire plug head and inverter plug socket (the orange stuff) were both damaged. I did not find any evidence of arcing. They have been replaced.

I never have gotten it to start. Recently took it to the dealership and the reports I have are

P3100 with info 310
P3125 with info 327; 332

I have a list of the info, which says basically inverter current sensor issue on the P3125, and generator pwn line on the P3100

Any help would greatly be appreciated. I’ve been a mechanic for many years and a radio electrician before so I’ll be able to follow your input.

Thanks

Welcome new poster. The below info comes from Graham Davies’ scanner manual. I presume it is accurate and perhaps helpful.

P3100 — HV ECU Malfunction
3100: 310 HV ECU internal error. Generator PWN Line Connection Malfunction

P3125 — Converter & Inverter Assembly Malfunction
3125: 327 Generator Inverter Current Sensor Malfunction. Open in generator inverter current sensor (V phase sub sensor)
3125: 332 Generator Inverter Current Sensor Malfunction. Generator inverter current sensor V phase performance problem

I have no experience fixing any of these things, but have to guess that all is not as it should be inside your inverter. I hope that additional info gets posted here. Good luck.

Thank you. I have that information, and was hoping someone might have some information on how to diagnose the cause.

The inverter was not replaced, just the damaged plug. I’ve found diagnostic procedure info on the P3125 ( I believe from TIS) showing which lines from the HV ecu to the inverter to check for continuity, and if good the recommendation was to replace the inverter.

I’ll also with the inverter out now check the front of the transaxle.

Thank you both. I don’t want to buy an expensive part as an experiment.

Good point.

You’ve been advised that P3125 is usually resolved by replacing the inverter. This is not necessarily true for the Gen 1 Prius. Even a cursory look at Toyota’s service information for this code will confirm that there are multiple failure points.

You’ve also been advised to «check out the wiring» at the front of the transaxle. However, issues with those circuits are reported by a completely different code, so I doubt your present issue is there. Again, this is clearly laid out in the service information.

And many well-meaning folks who toss out ideas here are working from paper manuals. Toyota updates their service information regularly, and the online version is the most accurate. Since you’re a mechanic, you’ll know how to access that information.

You said the «orange plug» at the rear of the inverter was replaced. If so, then someone had to have disassembled the inverter; the part is not available separately, and cannot be switched out without taking the inverter apart. You may want to remove the lid from the inverter and take a good look at the components. Anything loose?

Also remove the circular metal plug at the front right corner of the inverter (two Torx bolts). Make sure the three bolts inside are tight. These connect the generator cables to the inverter.

If those bolts are not tight, that will affect current levels, and the inverter will report that to the HV ECU, and set a code.

I recently aquired diagnostic info on the two codes from TIS and Alldata. The 3100 and subcode said simply «replace the HV ECM. This has been done with the same part number from a wreaking yard.

3125 diagnostic procedure on the sub codes says to check continuity between 5 wires from the HV ECU and the inverter. This was done and one of the five wires was broken. This was repaired and checked to have the < 1 ohm resistance as recommended.

At this point it will go ready and kick out again after a few seconds. Unfortunately the wise thing to do after these repairs is of course to have the codes pulled again. This costs me $100 a shot, so I’m undecided as to whether to purchase an inverter offered to me for $250 or pull the codes.

All wiring in front of the car was in tact. Inverter after replacement of the orange twin plug in back has correct and tight connections.

Unfortunately, not all of the information for this code is in one place in the manual.

Regarding that particular information code, you can find the following elsewhere in Toyota’s service information:

«If the hybrid vehicle control ECU detects errors in the PWM signal, it will conclude that there is an internal malfunction involving the hybrid vehicle control ECU or line connections.» [my italics]

Great, we have some progress. To review, you had an HV ECU code for a generator signal problem as well as an inverter code for a generator signal problem. Might the broken wire, rather than a faulty HV ECU, be the root cause of both codes?I realize that others have leaned towards inverter replacement, but rather than guess, I think the sensible thing to do would be to record your data, clear the codes, and see what new codes you have.

How long has this vehicle been sitting without running?

The car has been sitting for two years. I get one bar on the display with key on.

The cut wire was labeled GIVB on the diagram from TIS between the inverter and HV ECU.

For me to check the codes would be another $150 for transport and reading.

Both the top cover and the lower cover were removed for inspection and replacement of the orange two wire receptical at the back. Other than that being busted on one side, all looked good.

I get less response from the replacement HV ECU than the original one. I’ve seen a thread where it was necessary to clear the inhibitor after replacing by shorting pin 4 — 13 on the OBD plug for 30 minutes, but this has no success.

Are you sure P3100 Is the HV ECU malfunction?

What is P3001 ? I thought that was HV ECU malfunction

Hi Colonel, I copied this from the miniscanner manual authored by Graham Davies, and I am confident that he did an accurate job transcribing from his sources. However, «sure» is a word with unique connotations.

P3001 is listed there as a battery ECU malfunction.

I have no doubt that others with direct access to Toyota’s technical documents would correct these here if necessary.

Tochatihu is correct. P3001 indicates a battery ECU issue. P3100 indicates an HV ECU issue.

02 — gen 1, TP

HELP !!!!! We have the same problem!!

P3125

I replaced my inverter & inverter coolant pump and same problem, starts and runs but no reverse & no drve

Quest::::

1.) wheres the HV ECU exactly ?
would the HV ECU be the same part as the inverter?

2.) can someone tell me the exact diagnostic procedure info on the P3125 ( I believe from TIS) showing which lines from the HV ecu to the inverter to check for continuity

3.) pls also tell me (with the inverter out) HOW to check the front of the transaxle ? what to use what were lookn for?

The ? sounds dumb but when cars front wheels are off ground they should turn for drve and reverse correct?