R50/53 Need Help! EP transmission and lots of error codes...
#51
Yes, that may help. That looks like the smaller of the 2 DME connectors. But my molded DME shows way higher PIN numbers on that side so I thought it was the other connector which has a pin 29 and 30 according to the molded in PIN numbers. listed in Bentley.
Does your book show the pin out?
Does your book show the pin out?
#52
#53
#54
EDIT. I’m on wrong pins in this pic.
OK thank you!
Still having some confusion on my readings.
Unfortunately the molding in PIN numbers on X60004 do not match the pin out. They are WAY higher. Thus, I’m unable to confirm I’m in 29 and 30. Is the pic a birdseye or looking into the connector on harness?
See attached pic. Shorted across pins 29 and 30 of DME?
OK thank you!
Still having some confusion on my readings.
Unfortunately the molding in PIN numbers on X60004 do not match the pin out. They are WAY higher. Thus, I’m unable to confirm I’m in 29 and 30. Is the pic a birdseye or looking into the connector on harness?
See attached pic. Shorted across pins 29 and 30 of DME?
Last edited by audihere; 04-22-2023 at 06:07 PM.
#56
#57
#58
#59
#60
Yeah, that connector diagram still has me second-guessing myself on which way it is. I haven't seen anything in the Bentley confirming orientation though, which is bothering me. Surely it's buried somewhere in the book.
Yes, ECU/DME/EMS2000(or MS5150 if it's a late production car) are the same thing.
That seems very ungood... Think you're sure about connector orientation? From looking at the wiring diagram, I don't think you could get 116 Ohms or whatever on the harness side if you had it mirrored though, but I'm not positive.
That's the way I've been interpreting it as well. It sounds like all the modules are in parallel on the bus, and the DME and IKE each have 120 Ohm resistors across the lines (CAN hi and CAN lo), while the other modules have a very high impedance across the lines.
Yes, ECU/DME/EMS2000(or MS5150 if it's a late production car) are the same thing.
That seems very ungood... Think you're sure about connector orientation? From looking at the wiring diagram, I don't think you could get 116 Ohms or whatever on the harness side if you had it mirrored though, but I'm not positive.
#61
#62
#64
#65
#66
Measuring from Tach plug:
Without DME plugged in 114 Ohms.
With DME plugged in 126 Ohms.
#67
#69
Hmm. At first glance that doesn't seem good. The only thing I'm wondering about is how the tach is connected internally to the speedo. I found the wiring diagram for the CAN bus, but it's not immediately clear to me whether you should see 120 Ohms or 60 on that line. Some documents suggest that everything on the CAN bus should be in parallel, right? And it sort of seems like the tach is on the CAN bus along with the IKE, the ABS module, the DME, the TCU, and the steering angle sensor, but then it isn't always listed there. But the wiring diagram shows it connected through the IKE.
One thing that’s really been bothering me is we don’t see any resistance between pins 6 and 14 on the OBD port. Is it on that diagram?
#70
Hmm. At first glance that doesn't seem good. The only thing I'm wondering about is how the tach is connected internally to the speedo. I found the wiring diagram for the CAN bus, but it's not immediately clear to me whether you should see 120 Ohms or 60 on that line. Some documents suggest that everything on the CAN bus should be in parallel, right? And it sort of seems like the tach is on the CAN bus along with the IKE, the ABS module, the DME, the TCU, and the steering angle sensor, but then it isn't always listed there. But the wiring diagram shows it connected through the IKE.
#71
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#73
#74
Power cycled the key to position 2 and lights went off.