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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.
I pulled this out of the TIS documents I have. It looks like it's showing CAN on pins 29 and 30 of X6004. I do have a pinout for X6000, too. I'll grab it in a sec.
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; Apr 22, 2023 at 06:07 PM.
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.
Originally Posted by audihere
I may have found an issue in the EMS2000 (which I think is the ECU).
Yes, ECU/DME/EMS2000(or MS5150 if it's a late production car) are the same thing.
Originally Posted by audihere
Pins 29-30 CAN Hi to CAN Lo are measuring Open. 2.8 MegaOhms.
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.
Originally Posted by audihere
I don’t know if I’m interpreting this right but I think there should be a 120 Ohm resistor inside the ECU on these pins right??
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.
Oh, but either way something's wrong because you checked both possibilities, right? One set of pins is basically a dead short and the other is an open circuit, where you should be seeing 120 Ohms somewhere?
Another question. When you measured... 110 Ohms (I think?) earlier, was the DME connected? The measurement you took before you checked the resistance looking into the harness side of X60004 at the DME, that is.
Another question. When you measured... 110 Ohms (I think?) earlier, was the DME connected? The measurement you took before you checked the resistance looking into the harness side of X60004 at the DME, that is.
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.
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.
That’s a great diagram.
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?
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.
Do you have A7000 trans module connector diagram. I see the CAN wires but can’t tell where they are in the connector to probe.
Only in the front, and the fog light below is on too, or just the two parking lights that are visible in the pic?
it was just the two lights on that side of the car. But I then noticed the rear tail light on the same side was also on. All of this with key out and light switch off.
Power cycled the key to position 2 and lights went off.
Only in the front, and the fog light below is on too, or just the two parking lights that are visible in the pic?
Nice catch. If the rear are on, too, are you thinking the indicator stalk is set to right turn, and that feature that lights up one side solid when the car is off is activated?
