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Location:
Castlemaine Vic
Registered:
November 2002
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 diagnostic codes (7mgte)
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Sun, 28 December 2003 00:15
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hey all,
just bridged the two terminals in the diagnostic box. and iv came across codes 34 42 and 51.
i think 51 is something to do with the TPS but the other two im lost on.
what do i need to fix them, and where can i get the replacement parts to do so if need be.
the reason i checked for codes is, from time to time, when i plant the foot from almost a complete stop and get to around 50-60kms something cuts out and the power just stops, BOV goes off, and then take off again , but the check light stays one for a few seconds then goes and its all back to normal.
what could be causing this problem, will it be one of those error codes mentioned?
ps, its a Auto ma70 turbo
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Location:
sydney
Registered:
March 2003
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Re: diagnostic codes (7mgte)
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Sun, 28 December 2003 00:57
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51
Switch Signal
No "IDL" signal, "NSW" signal or "A/C" signal to ECU during diagnostic check A/C switch circuit
A/C switch
A/C amplifier
Throttle position sensor circuit
Throttle position sensor
ECU
42
is speed sensor from the back of the speedo to the ecu
34 is abnormal turbo boost pressure so this will come on if u overboost and have no fuel cut defender
sounds like u are overboosting
what psi u running thru the engine
i think they cut out around 12
if u r runnin more then get a fuel cut defender
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Location:
Castlemaine Vic
Registered:
November 2002
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Re: diagnostic codes (7mgte)
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Sun, 28 December 2003 05:26
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hmm code 51, sometimes the likes on the control panel for the a/c /heater don't come on, would this be causing the 51 code?
code 34, I'm running 10psi, sometimes creeps to 11 then back down to 10, maybe its getting to close to the fuel cut limit and causing it to do red code 34, and maybe shut off momentarily ?!
and as for code 42, do i need to replace the speed sensor behind the dash or something?
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Location:
sydney
Registered:
March 2003
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Re: diagnostic codes (7mgte)
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Sun, 28 December 2003 06:26
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does the speedo work
if it does then the signal from the back of speedo is not gettin to the ecu
its usually a purple wire with white trace
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Location:
Castlemaine Vic
Registered:
November 2002
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Re: diagnostic codes (7mgte)
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Sun, 28 December 2003 10:23
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the speedo does work, yes.
so to find the wire i have to pull the dash apart? and when i find it, what do i do to/with it?
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Location:
sydney
Registered:
March 2003
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Re: diagnostic codes (7mgte)
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Sun, 28 December 2003 10:26
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on the ecu theres a spd wirew
its purple with white stripe
u need a multimeter to check that u r gettin a pulse there when the car is movin
as hte car go faster
tyhen the pulses go faster
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Location:
Lost in the K hole
Registered:
May 2002
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Re: diagnostic codes (7mgte)
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Sun, 28 December 2003 10:40
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sideshow - what exactly would the speed sensor be used for aon a manual ECU? i obviously cant clear that code (cant find a speed sensor output on the supra cluster)... but the engine check light isnt staying on, and the thing seems to run fine...
any advantage to getting a speed sensor hooked up?
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Location:
sydney
Registered:
March 2003
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Re: diagnostic codes (7mgte)
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Sun, 28 December 2003 11:25
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i have not found that it causes any probs on a manual car
only hting it might do is control the idle better when decelerating
on an auto car it can make the auto not change gears thats bout all
but on most carby corollas that i wire efi engines up to them they dont have the signal comin form the speed sensor so i never hook them up
but i have devices now for connecting a speed signal to the ecu and runnin a speedo cable at same time
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