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Hmmm, at the 70th second of this video in https://www.myrav4ev.com/threads/charging-stopped-due-to-system-malfunction.2692/#post-31687 an oscillogram of the RMI voltage (with d15 connected at good cabin heater) is shown when the target heating temperature is lower than the outside temperature...

1. Part of the drivers for controlling the HV transistors of the heating elements is galvanically separated from its low-voltage part and from the heater control board. 2. The /FLT signal from this drivers is transmitted to cabin heater CPU when its internal circuits fail, but not due to the...

The difference is not only in the absence of HV voltage. 1. The presence of external power supply of the PMC ECU is not enough to activate it/to control its output stages, such as current sources. https://alflash.com.ua/2019/to_rav4ev/heat_control.png 2. Mr. asavage did not connected external...

1. Sorry for being frank, but such a check is not entirely correct, since it may not be enough to connect 12 V power supply to activate the PMC ECU. I do not exclude that its output stages use not only resistors, but also controlled semiconductor current sources when switching on/activating the...

I stop understanding you... Please explain to me. If "...the car wasn't even turned on in this. D15 was disconnected.", then 1. Where does the supply voltage on the connector come from? Is IGCT 3 relay active/closed in this situation/state? 2. Was the resistors connect between RMI and PWR? 3...

Off-topic. This ancient friend of mine is almost 50 years old :) My (6 ch.) USB oscilloscope is also almost 20 years old

In this "episode"/"scene" was the heater active? In other words, were there "traces" of the control signal on the RMI line similar to those shown earlier?

1. The heater "listens"/"obeys" the signals of a worthless chinese generator, whose output signal is connected to +12 via a 1.5 kOhm resistor and a LED, 2. The heater "understands" the control signal from the PMC ECU only when the RMI line is connected to +12V via (IMO. unacceptably low) 333 Ohm...

There is no need to repeat this test. Power was connected to the low-voltage part of the heater. 1. The oscilloscope is connected to the RXD output (pin #9 of ATA6624C ). Changes in the amplitude of control pulses from 7 to 15 volts and changes in their frequency from tens to hundreds of Hz...

I assume that the ATA6624C LIN transceiver is used only as an input buffer for the PWM signal of the heater control. This version is confirmed by the video oscillograms of the control voltage and the fact that a copy of the input signal with an amplitude of 5V is constantly present at its RXD...

Note. If the fan was not receiving power, there would be no noise when it was turned on! Check the air ducts. In my practice, there was a case of extraneous noise from the fan due to garbage brought there by rats or mice. I regret that I did not take a photo of their "treasures" :)

1. Please note the notes. As I assume, max. allowed power for the used R type =0.125W. 2. I hardly understand why the heater "obeys" the pulses of the generator with Rloads > 1.5kOhm (especially when it has a "colleague" inside the LIN transceiver Rnorm.mode). 3. At a current of 0.03A, the...

I think that reducing to 1 kOhm is useless. But it's up to you to decide.

I assume that there is no need to reduce it below 2kOhm, since we do not know the permissible load capability of the PMC ECU output. Excuse me, but I do not understand the question. I base it on the fact that with all these checks of heater control from the generator and when checking control...

Are the oscilloscope probes connected to an external resistance? What is its resistance value? I have never directly connected the supply voltage to the information inputs. And I do not advise others to do this. Cancelled due to misunderstanding of the question, sorry. In addition, high...

Even on this forum there are almost ten descriptions of repairs confirming that the main reason for the CHG_f078 code is a blown fuse in the OBC, costing about $50US. And this topic does not need research, since it is banal. Although for illiterate "specialists" it may be terra incognita :( If...

Shall we check the heater control when connected with an external 2kOhm (not 10 kOhm) resistor? Note: On the board, the generator output is connected to 12V via a 1.5kOhm resistor (152) and a LED. The previous photo shows the diagram of the input circuits of the LIN transceiver RMI signals...

This is what we know now. 1. According to https://www.myrav4ev.com/threads/charging-stopped-due-to-system-malfunction.2692/page-7#post-32100 the heater can work using control from an external simulator (NE555). 2. Now we know that the control signal from the PMC ECU without connection to the...

Note: When charging use OBC through charging port, a chiller is used to cool the battery, through which the HV battery is cooled using an air conditioner. https://alflash.com.ua/2019/to_rav4ev/bat_over.png

The procedures for replacings the coolants* are quite simple and changing the factory design of the engine cooling system does NOT change/complicate it. Some difficulty is the need to use a publicly available** diagnostic program for the Tesla system (v.1.1.46) to perform the Coolant Air Purge...