becm no voltage for criuse control

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scottdej

Member

Posts

54

• Jun 15, 2013

• #1

hi all,

great forum and hope i can add to it in future, i have a cruise control problem, basically it stopped working !.

replaced all vac pipes checked all connections vacuum pump and gone through the tests in rave, have narrowed the fault down to the becm, i do not have the 5volts as i should have according to test 3d. have checked the contiuity of the YR wire all is ok.

so other than change the becm, which id rather not is there any way of getting the becm fixed?

any info greatly appreciated and thanx in advance.

 

Saint.V8

Dyed-in-the-wool 100% RR Junkie

Full Member

Posts

16,479

Location

North Dorset - Near the East & West Stours

• Jun 15, 2013

• #2

You did do the test into the back of the connector with it all still plugged in yes??

If you didn't, do it again

If you did....that wire looking at the schematic is to/from the BeCM with noting in between so if you have continuity, time to plug it in to diagnostics and see if there are any fault codes!

 

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scottdej

Member

Posts

54

• Jun 16, 2013

• #3

hi thanx for reply,

yes i followed rave to the t, also i have the hawkeye diagnostics and check things regular, no fault codes.

 

dogsbody

Very senior member

Posts

10,685

Location

Bristol

• Jun 16, 2013

• #4

For anything to do with the internals of a BECM, Rick-the-Pick is your man.
He does them professionally (he's a business and he charges, but he also guarantees his work).

 

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scottdej

Member

Posts

54

• Jun 25, 2013

• #5

just to let you know, sorted cruise control by simply winning a replacement c/c ecu from ebay, .99p bargain, nothing to lose for that money and hey presto it all works!!,

so i did all the tests according to rave, which concluded it to be a becm fault, but clearly not the case! moral, dont always believe what you read, after all its a p38!.

 

jacckk

Active Member

Posts

321

Location

Durham, UK

• Jun 25, 2013

• #6

I also did the tests when my cruise control didn't work and it gave the result that something was wrong with the BECM. Since nothing else was wrong I just assumed RAVE was lying. Ordering a new CC ECU and inverter solved it.

So basically for the price of a CC ECU I would just try replacing that first before even attempting the RAVE tests on it (obviously check the vac hoses first).