Vida CEM swapping

[Canadian Moose]

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>>> more is not possible >>>

why does the program not continue

What year is your car? I am stuck in the same spot with my 2002.

[vtl]

What year is your car? I am stuck in the same spot with my 2002.

Earlier MYs need K-Line to be managed for CAN communications be possible. That's a bit more schematic and code.

https://hackingvolvo.blogspot.com/2012/ ... n-bus.html

[efe09]

E0CDC487-E5C5-46C4-9A28-989B0D369FE8.jpeg86026E05-F661-4A05-B733-1BAF69E8A3E1.jpeg

>>> more is not possible >>>

why does the program not continue

What year is your car? I am stuck in the same spot with my 2002.

Hi Canadian Moose,

My Volvo XC90 D5 My2009

[jcdillin]

All right, so I had a really busy stretch at work and shelved this project for the time being. Now picking it back up today.

So far I've tried 1 CEM on the Bench and 2 in cars all with the same result. On each of the 3 cars i've tried the Part Number changes so i'm pretty confident that everything is talking OK.

Bench CEM is from an 07 S60
Car 1 Test is an 06 V70R
Car 2 Test is an 07 V70NA

This is with a teensy 4.0 and 3.3V can transceiver on each HS and LS networks.
Using

#define HW_SELECTION TEENSY_CAN_HW

Any suggestions on how to move forward?

Code: Select all

CPU Maximum Frequency:   600000000
CPU Frequency:           180000000
Execution Rate:          180 cycles/us
Minimum CEM Reply Time:  30us
Platform:                P2
PIN bytes to measure:    3
Number of samples:       30
Number of loops:         1000

CAN high-speed init done.
CAN low-speed init done.
Initialization done.

Putting all ECUs into programming mode.
---> ID=000ffffe data=ff 86 00 00 00 00 00 00
---> ID=000ffffe data=ff 86 00 00 00 00 00 00
Reading part number from ECU 0x50
---> ID=000ffffe data=50 88 00 00 00 00 00 00
<--- ID=0042406c data=c0 88 00 00 60 00 c0 03
Part Number: 0000600012003
Calculating bytes 0-2
Timeout waiting for CEM reply!
Timeout waiting for CEM reply!
Timeout waiting for CEM reply!
Timeout waiting for CEM reply!
Timeout waiting for CEM reply!
Timeout waiting for CEM reply!
Timeout waiting for CEM reply!
Timeout waiting for CEM reply!

[vtl]

Most likely the bus is not silent (some other module keeps sending CAN messages). I keep kicking my own buns to try the cracker in-car versus on-bench, but something else comes up before I can turn my attention to the cracker. Like right now I'm rebuilding alternator in wife's almost new (5 y.o only) XC60, we need to vehicles, and I can't mess the P2 XC70 up.

[jcdillin]

Yeah, i'm getting the same timeout on the bench CEM so I don't think it's the module issue in this case. Something else is wonky.

[vtl]

Do you have a 120 Ohm termination? Stabilized +5v coming not from USB? Try removing that Zener diode (CAN-L is 2.5v max, 3.3v MCU handles it well).

[jcdillin]

Interesting, so I put the can RX line as per the Arduino file instructions since I'm using a Teensy with the built in can and not an CAN shield. Should have it direct to the can L on the HS network?

[vtl]

I have the CAN-L Teensy's pin wired to a real CAN-L, in any configuration. Not sure why Mark (who wrote the doc) thinks RX line is better, besides it is 3.3v safe. I tried it once and it worked, however the SNR (signal-to-noise ratio) was worse.

[RickHaleParker]

To the guys having trouble getting their configuration to work. It might help if you edit the schematic to reflect your hardware build. Then post the schematic and the code you are using here so others can look it over.

EasyEDA Download

PS: Where are the json files for the schematic ?