cornishboater
Well-Known Member
Thanks, I believe it may have been you that mentioned that the inhibit wire also ran through there, I have printed the diagram so I will have to dig it out. As I was only looking for the inhibit I probably didn't notice the cruise circuit.....
cornishboater
Well-Known Member
where did you get them, I gotta know..........
cornishboater
Well-Known Member
I have a long tester unit and I went directly from the ECU to each sensor which told me there was no continuity on the RH rear which was all well and good but it didn't obviously tell me where the problem was. After tons of wire wiggling I pinpointed the break and all was well with the world again. I hindsight it would have been far easier just to have run a new wire and left the old one there, such is life!
I am not going to get to involved as others know more than me. But. Unplug it at the sensor and the ecu, bridge the relevant pins at 1 end and check continuity to start with. Continuity isn't always the be all of tests but its a start.
Then check the "common" line.
Or you could do each line separately.
Were they good quality sensors?
You can check the sensor on its own to see if its ok with a DMM, which I assume you have, if you don't then get 1.
J
.
UnitLandy
Member
Ooow. Where do you get those and what's it's full name?
Digital Multi Meter
.You got 1 of them right if you make Daleks
.What diagnostics you using?
J
cornishboater
Well-Known Member
Bob, or maybe dave.......... You can't own a P38 without a DMM (or a Dalek come to that..) I run a village hall and a dalek would be a great place for a camera to watch over the parties especially if the top was powered (and the exterminator laser)
Datatek
Well-Known Member
They don't but the ride height switch does and that is what causes the problems often attributed to height sensors.
UnitLandy
Member
Ah! Is that a fact. That's interesting. So would the diagnostic still register the sensor out of range if it was a bad connection the height switch?
That would be so much simpler...
Datatek
Well-Known Member
Good question to which I do not have a definitive answer
While I agree there could be unexpected behaviour, I'm not 100% convinced it would cause height errors itself.
Unfortunately there not any real info out there that I have found. Nigel Hewitt's page does give some help, no definitive details on the real protocol.
The Up & Down switches from the switch to the EAS ECU are simply grounded to the ECU pins 32 & 33 to tell the EAS to go up or down. The EAS output data signals on pins 7 & 25 tell the switch LED's what to display, plus are inputs to the BECM pins 9+18 for messages in the Instrument Cluster display. Pin 8 on the BECM is for the Wade Lamp in the instruments, but it's not clear if this is triggered by the EAS Data, or thye state of the top LED ?
So issues with C104-C204, and C102-C202 will have different impacts. Up-Down might need several presses to get the ECU to respond ? Intermittent data signals would me with the LED's, and potentially tell the BECM incorrect info.
Maybe between us all we can figure it out ??
Unfortunately there not any real info out there that I have found. Nigel Hewitt's page does give some help, no definitive details on the real protocol.
The Up & Down switches from the switch to the EAS ECU are simply grounded to the ECU pins 32 & 33 to tell the EAS to go up or down. The EAS output data signals on pins 7 & 25 tell the switch LED's what to display, plus are inputs to the BECM pins 9+18 for messages in the Instrument Cluster display. Pin 8 on the BECM is for the Wade Lamp in the instruments, but it's not clear if this is triggered by the EAS Data, or thye state of the top LED ?
So issues with C104-C204, and C102-C202 will have different impacts. Up-Down might need several presses to get the ECU to respond ? Intermittent data signals would me with the LED's, and potentially tell the BECM incorrect info.
Maybe between us all we can figure it out ??
Datatek
Well-Known Member
Corrosion causing tracking between pins causes a variety of problems which I think confuses the ECU.
brianp38dse
Well-Known Member
What diagnostics are you using on the eas to calibrate the sensors
