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EEC IV ECU DIAGNOSTIC 

 

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 Post subject: EEC IV ECU DIAGNOSTIC
Posted: Sun Nov 05, 2006 12:53 am 
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here it is, took me 3 days and many hours to get hold of so i thought i would share it

3.9 CFI FUEL INJECTION ECU CODES

HOW TO READ THE CODES WITH A TESTLIGHT OR VOLTMETER


The ford EEC IV ECU will enable two test modes, K.O.E.O(key on engine off) and E.R (engine running).
There are five service code types

FAST CODES: used for checking codes during manufacture.
Some code retrieval tools use this system

ECU IDENTIFICATION: The first code sequence, give ECU codes eg: 20, 30, 40 ect

ON DEMAND CODES (hard codes): Faults present an time of test.

SEPARATOR CODES: code 10 separates hard faults from memory faults

MEMORY CODES:codes for intermittent faults that have happened in the last 20 engine warm up cycles.

DIAGNOSTIC CODE EXTRACTION PROCEDURE

KEY ON ENGINE OFF
jump the self test connector black/white wire teminal 2 on the 6 pin connector to the white/red wire 1 pin self test connector.
connect the negitive of the voltmeter/test light to the white/black teminal 4 of the 6 pin connector and the positive to the positive battery teminal.
switch on ingintion and the ECU will proform self test. remember that hard faults are first, followed by a separator code and then memory fault codes.

KEY ON ENGINE RUNNING
connect the voltmeter/test light to the black/white wire terminal 2 of the 6 pin connector and the other lead to the positive on the battery teminal.
start the engine and connenect the white/black wire terminal 4 on the 6 pin connector to the white red wire 1pin self test connector.
becareful when connecting not to double touch when connecting or the ECU might lock you out of the self test. the engine rpm should increase when self testing begins. this high idle will continue while the ECU carries out its own self tests. as soon as the idle decreases, any fault codes will start.
while the ECU is in selt testing is the only time the ignition timing can be checked or ajusted.

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READING OF DIAGNOSTIC CODES

the codes are output through the voltmeter/testlight and are represented by a series of deflectons of the voltmeter needle or flashes on the test light.
each deflectons/flash lasts for .5 seconds, there is a two second pause bettween each digit, a four second pause between each code and a six second pause before and after the seperator code, after all codes have been output the code sequence will be repeted once.
for example if code 21 is present in the system there will be a two .5 second deflectons/flashs, a two second pause, one .5 second deflectons/flash, a six second pause then the separtor code. if more than one code is present in the system thay will be output in numerical sequence, smallest to largest.

ERASING DIAGNOSTIC CODES
to clear the codes simply disconnect the wire to the self test connector during testing.

DIAGNOSTIC CODE LIST (CFI ONLY)

CODE..................................SYSTEM/COMPONENT


10.......................................separator codes

11.......................................system ok

12.......................................rpm out of spec

13.......................................rpm out of spec

14.......................................unstedy pip signal during idle test

15.......................................loss of KAM, bad KAM/ROM data

16.......................................rpm too low to run fuel test

21.......................................ect sensor out of range

22.......................................map sensor out of range

23.......................................throttle sensor out of range

24.......................................atc sensor out of range

41.......................................hego sensors lean during fuel test

42.......................................hego sensor rich during fuel test

51.......................................ect voltage too high

52.......................................power steer switch open

53.......................................throttle posision senors voltage to high

54.......................................air charge sensor voltage to high

55.......................................internal power to module to low

58.......................................faults in the idle tracking switch

61.......................................ect voltage to low

63.......................................throttle sensor voltage to low(closed throttle)

64.......................................air chage sensor voltage to low

67.......................................nds or a/c is on

68.......................................faults in the idle tracking switch

78........................................interuption to key power circuit

85.......................................canister output circuit failure

87.......................................fuel pump relay fault

99.......................................idle speed corrections not learnt
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Posted: Sun Nov 05, 2006 1:21 pm 
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Good work.

Should get a mod to add it to the tech docs.

 

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Posted: Sun Nov 05, 2006 1:23 pm 
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Good on you :D

what stockstandard said

 

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Posted: Mon Nov 06, 2006 12:30 am 
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Thanks for the PM fastleno, will get onto it asap.

I've got all this stuff in my books and also stuff on cd's, i'll have to go through what we have / haven't got and upload them all when i get time.
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Posted: Mon Nov 06, 2006 12:51 am 
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no worries :)
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Posted: Mon Nov 06, 2006 11:30 am 
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good work fastleno!

If anyone has any doco's they would like to contribute, post a thread in the technical documents forum, I will see them in there and contact you to arrange it all!!

 

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Posted: Thu Jan 04, 2007 6:32 pm 
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Just had a look at this, and noticed its for cfi 3.9s. Is it all the same for MPFI?

 

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Posted: Thu Jan 04, 2007 10:57 pm 
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Great work fastleno.

Andrew J wrote:
Just had a look at this, and noticed its for cfi 3.9s. Is it all the same for MPFI?
Nearly, codes added for MPFI, and some extras too.
If code 70 comes up, start crying . . . .

fastleno wrote:

CODE..................................SYSTEM/COMPONENT


10.......................................separator codes

11.......................................system ok

12.......................................rpm out of spec (ISC solenoid MPFI, ISC motor CFI)

13.......................................rpm out of spec (ISC solenoid MPFI, ISC motor CFI, idle switch CFI)

14.......................................unstedy pip signal during idle test (TFI, worn dizzy)

15.......................................loss of KAM, bad KAM/ROM data (ECU)

16.......................................rpm too low to run fuel test (ISC solenoid MPFI, ISC motor CFI)

21.......................................ect sensor out of range

22.......................................map sensor out of range

23.......................................throttle sensor out of range

24.......................................atc sensor out of range

30.......................................ECU identification 3.9 MPFI

40.......................................ECU identification 3.9 CFI with manual trans

41.......................................hego sensors lean during fuel test

42.......................................hego sensor rich during fuel test

50.......................................ECU identification 3.9 CFI with auto transmission

51.......................................ect voltage too high

52.......................................power steer switch open

53.......................................throttle posision senors voltage to high

54.......................................air charge sensor voltage to high

55.......................................internal power to module to low (CFI)

58.......................................faults in the idle tracking switch (CFI)

60.......................................ECU identification 3.2 CFI with manual transmission

61.......................................ect voltage to low

63.......................................throttle sensor voltage to low(closed throttle)

64.......................................air chage sensor voltage to low

67.......................................nds or a/c is on

68.......................................faults in the idle tracking switch (CFI)

70.......................................ECU identification 3.2 CFI with auto transmission

78........................................interuption to key power circuit

85.......................................canister output circuit failure

87.......................................fuel pump relay fault

99.......................................idle speed corrections not learnt-car not run since battery was disconnected

 

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Posted: Thu Jan 04, 2007 11:26 pm 
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Ooo, code 70 might be a hard one to come to grips with. Thanks heaps but, ill be checking this tomorrow!

 

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Posted: Sun Feb 04, 2007 4:16 pm 
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So i finally got around to running it. The only codes i've come up with so far for the KOEO test is 52. There were a few flashes before that, but they werent repeated, and were really short? Not sure whats going on there. Next up was the engine running test. I did everything as the instructions said to, but the revs never increased, and the test light never turned out? Whats going on there?

 

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Posted: Sat May 24, 2008 4:01 pm 
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bump .... having the samething from my read outs ?
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