I collected the replacement SCB100201 cruise interface this morning and fitted it after disconnecting the bypass wiring I successfully tried yesterday at message #82 above. There is still no voltage on C0895-9, so obviously the interface is inhibiting the 12v output to the ECU due to another element. The brake switch remains the chief suspect as previously discussed.
I removed the non-working C0895-9 feed to C0239-1 and instead of connecting a spurious 12v feed to C0239-1 as I did yesterday, I used the master switch C0749-5 output as it made sense to control everything from the same switch. Alas, instead of the IPK light coming on and cruise working as before, when I pressed the set/accelerate paddle, it flashed once and the horn sounded. Thereafter, it was dead until I stopped, switched off the engine & restarted when it repeated that behaviour.
I removed the C0749-5 supply and reconnected the separate feed to C0239-1 as per yesterday. Everything worked again. Tried the switched feed one more time but just got the flash 'n' toot followed by nothingness (presumably because the ECU errored out and did what it's supposed to do until it's restarted and cleared).
Quote:
Originally Posted by SD1too
The EPC descriptions are nonsensical. Since your brake lights work and so does cruise, there's a case for cutting your losses and supplying the cruise ECU independently of the interface ECU.
|
The correct thing to do would be for me buy a XKB000090 brake switch and try that as it remains the only one which is specified as double pole. After weighing up the risks, disadvantages and advantages, I am not going to do so and will instead complete the wiring with the separate feed to the ECU C0239-1. I would though like to know why the cruise master switch connection produces an error as I want to have only one switch. I can work around it using a relay if necessary.
Quote:
Originally Posted by xsport
...i needed a replacement and looked at past threads and was told the xkb000022A was the only one that works now on the autos... whatever the truth is it worked for me no problems
|
Was your car built with the wiring in place?
Dougie.