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Location:
Newcastle
Registered:
June 2002
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Location:
Toronto, Downtown
Registered:
September 2004
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Re: check engine light
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Thu, 03 March 2005 08:13
 
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i would imagine it would have something to do with the timing but the best thing to do is to stick a paper clip into the diagnostic plug on t1 and c1 if i remember correctly (i would double check that) and see what error code it spits out. Mine was the knock sensor. takes 5 mins
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Location:
Campbelltown, NSW
Registered:
November 2004
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Re: check engine light
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Thu, 03 March 2005 08:13
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hmmmm..
engine earthed properly?
NOLAN
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Location:
Newcastle
Registered:
June 2002
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Re: check engine light
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Thu, 03 March 2005 08:23
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I found this on MR2oc. however it is for an 86 model. mines an 87. will this check work?
'86 ECU codes
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1 = Normal (No codes recorded)
2 = AFM signal (Open in VC, VS, VB, or E2 or short in EC)
3 = Ignition signal (no signal from igniter 4 times in a row)
4 = water temp sensor (fault in coolant temp. sensor circuit)
5 = O2 sensor (open in O2 sensor - lean signal only)
6 = RPM signal (No Ne, G signal within several seconds after start)
7 = TPS (circuit fault in TPS signal)
8 = Intake air temp sensor (fault in intake air temp sensor circuit)
9 = (There is no 9)
10 = Starter signal (no STA signal before engine reaches 800 RPM)
11 = Switch signal (AC switch on, TPS idle switch off, or AT shift in D during check)
(You will get a 10 code if vehicle is push started.)
To check codes: (throttle closed, transmission in neutral, all accessories off, engine at normal operating temperature)
Turn ignition ON - do not start;
Short T - E1 on service connector;
read codes as indicated by check engine light flashing.
Normal code is 1 flash every 5 seconds.
Fault codes will read in ascending order, - code - 2.5 second pause - code - 2.5 second pause - code, etc. until all codes are read. They will repeat as long as T - E1 are shorted.
Note: a medium sized paper clip makes a good shorting tool for the diagnostic connector.
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Location:
Adelaide
Registered:
May 2003
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Re: check engine light
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Thu, 03 March 2005 08:24
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Yeah, should be fine. There is another list on Club4ag if you have issues with that one.
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Location:
Toronto, Downtown
Registered:
September 2004
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Location:
Newcastle
Registered:
June 2002
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Re: check engine light
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Wed, 09 March 2005 19:25
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Guys i checked the codes however i am unsure if i did it correctly (i think I did)
When i shorted T and E1 i get
4 flashes - short pause - 2 flashes - long pause
and repeat
Now I thought this meant a code 4 and a code 2. But then I found this on MR2OC.COM (see bold sentance)
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ITA-MR2, Is the CEL codes for the 87 the same for the 85-86?
Here is how to check the code:
MKI ECU Diagnostic Codes
Diagnosis System: To obtain output, proceed as follows.
Initial conditions must be met for codes to appear in normal output.
1. Battery Voltage must be 11 volts or more
2. Throttle valves must be fully closed (throttle position sensor IDL points closed)
3. Transmission in neutral position
4. Accessories switched off
5. Engine at operating temperature
Turn the ignition switch ON. (Do not start engine)
Short terminals TE1 and E1 of the check connector of the diagnosis connector cluster.
Diagnostic Codes:
Normal System Operation: (no malfunction)
1985 - 86 The light will blink once every 4.5 seconds
1987 ?
1988 – 89 The light will blink once every 0.5 seconds.
Malfunction Codes Indication
1985 – 86 The light will blink a number of times equal to the malfunction code indication with a 2.5 second interval between each indication.
After the largest code has been indicated, there will be a 4.5 second pause followed by another repetition of the diagnostic code(s).
1988 – 89 The light will blink a number of times equal to the malfunction code indication as follows:
1. Between the first digit and second digit, 1.5 seconds
2. Between code and code, 2.5 seconds
3. Between all malfunction codes, 4.5 seconds.
NOTE: The diagnostic code series will be repeated as long as the check connector terminals T and E1 are shorted.
NOTE: In the event of a number of trouble codes, indication will begin from the smaller value and continue in order to the larger number.
1985 – 1986 4AGE
Code No.
1 Normal
2. Air flow meter
3. Ignition signal
4. Water temperature sensor
5. Oxygen sensor signal
6. RPM signal
7. Throttle position sensor
8. Intake temperature sensor signal
10. Starter signal
11. Switch signal
1988 – 1989 4AGE
Code No.
12. RPM signal
13. RPM signal
14. Ignition signal
21. Oxygen sensor signal/oxygen sensor heater
22. Water temperature sensor signal
24. Intake air temperature sensor signal
25. Air-fuel ratio lean malfunction
26. Air-fuel ratio rich malfunction
31. Air flow meter signal
41. Throttle position sensor signal
42. Vehicle speed sensor signal
43. Starter signal
51. Switch signal
71. EGR system malfunction
1988 – 1989 4AGZE
Code No.
11. ECU (+B)
12. RPM signal
13. RPM signal
14. Ignition signal
21. Oxygen sensor signal/oxygen sensor heater
22. Water temperature sensor signal
24. Intake air temperature sensor signal
25. Air-fuel ratio lean malfunction
26. Air-fuel ratio rich malfunction
31. Air flow meter signal
32. Air flow meter signal
41. Throttle position sensor signal
42. Vehicle speed sensor signal
43. Starter signal
51. Switch signal
52. Knock sensor signal
53. Knock control signal in ECU
71. EGR system malfunction
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Now if i had a code 4 and a code 2 wouldnt it display the 2 code first and then the 4 code?? Am I actually getting a code 42??
Thanks
Im a bit of a newb
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Location:
sydney
Registered:
March 2003
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Re: GZE ECU codes help
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Wed, 09 March 2005 21:14
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its code 42
speed sensor
only come s on when the car gets over a certain speed and the ecu sees not speedo pulse
is yr speedo working fine
if not then thats the reason
most of the time it doesnt affect performance
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Location:
Newcastle
Registered:
June 2002
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Re: GZE ECU codes help
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Wed, 09 March 2005 21:24
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Thanks mate for clearing that up. Hahaha my speedo actually isnt working atm. I didnt put 2 and 2 together
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: GZE ECU codes help
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Wed, 09 March 2005 21:50
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it is entirely possible that you engine light flashing as such on a very hot day might be the ECU detecting knock (im not 100% sure if the AW11 gze has a knock sensor).
Code 42 = Speed sensor signal
The fact that this is happening should have little to no relevance to engine performance, and in my mind should not trigger the warning light to come on during normal driving.
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