[Freediag-discuss] Troubleshooting connectivity ME T16-008 to J1850 vpw/pwm

[camden l. <cam...@gm...>]

Hello-

I picked up a Multiplex Engineering T16-008 interface to use with freediag.

I have tested it on 3 cars so far, and have had poor results on all.

If it weren't for one of the cars, i wouldn't be sure that it was even
connected :(

(I had to recompile freediag after changing the address to 0x22 as
indicated on bottom of
http://freediag.sourceforge.net/Scantool-Manual.html)

I have the following at my disposal for testing, which I believe use
the noted standard
2000 Lincoln LS 3.0 - J1850PWM
2003 Dodge 2500 diesel  - J1850VPW
2005 Cadillac CTS-V - J1850VPW

The lincoln at least makes some contact with CPU
'L2 connection OK; tring to add SAE J1979 layer...
Bad checksum detected: needed 3B got 00
SAEJ1850-PWM Connected.
Connection to ECU established
Exploring Mode 0x01 supported PIDs (block 0x00)...
Bad checksum detected: needed 3B got 00
Exploring Mode 0x02 supported PIDs (block 0x00)...
Bad checksum detected: needed 3B got 00
Exploring Mode 0x05 supported PIDs (block 0x00)...
diag_l3.c:177: Read/Write timeout.
Request failed, retrying...
'

But the others don't appear to ever contact the ECU at all, i believe..

See attached screenlogs


Thoughts on what to try next?

thank you
.