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Offline Boomer

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Nissan Diagnostics
« on: May 16, 2002, 11:36:01 AM »
Who would like to know how to perform a Do it Yourself diagnostic on thier Nissans EFI computer, its a very simple procedure.
E34 M5 Conversion.

Offline Toppa-Top

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Re:Nissan Diagnostics
« Reply #1 on: May 16, 2002, 05:43:05 PM »
No itching.....fork up the procedure ;D ;D

Offline Dellas

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Re:Nissan Diagnostics
« Reply #2 on: May 16, 2002, 05:51:19 PM »
Me nuh belong yasso.....

Offline Cloud

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Re:Nissan Diagnostics
« Reply #3 on: May 16, 2002, 05:56:41 PM »
So wha you a do in here den? Get the hell out >:( ;D
When i'm good i'm good, but when i'm bad i'm even better

Offline Boomer

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Re:Nissan Diagnostics
« Reply #4 on: May 16, 2002, 08:41:31 PM »
Before you can perform the diagnostics you will need to find the diagnostic connector that the Nissan Consult tool plugs into, it is located in the fuse rack below the steering wheel inside the car. It is a gray plug and looks like this

  ------------
|o|oo|oo|oo|
|o|oo|oo|oo|
  ------------
turn on the ignition(do not start the car) then short out pins 8 and 9 (IGN and CHK) with a piece of wire for a second or two then remove the wire like so.

  ------------
|o|oo|oo|oo|
|x|xo|oo|oo|
  ------------

this places the computer in diagnostic mode and it will flash a series of codes using the check engine light on the dashboard.

The flashes will be in a series of long and short flashes, the long flashes represents the first digit and the sort flash the second. if you get 5 long and 5 short flashes everything is fine. All the codes are below, sorry about the formatting. To get out of diagnostic mode just turn off the ignition, this diagnostic procedure also resets the computer.


95 models:


11*  
Camshaft position sensor / circuit
Check the camshaft position sensor and circuit

12    
Mass airflow sensor/circuit
Mass airflow sensor source or ground circuit(s) may  be shorted or open.   Check the mass airflow sensor or circuit.

13
Coolant temperature sensor
Coolant sensor or circuit may be shorted or open.  Check the coolant temperature sensor & circuit.

14*
Vehicle speed sensor
Vehicle speed sensor signal circuit is open.

21*
Ignition signal
The ignition signal in the primary circuit is not entered during engine cranking or running (See a dealer service department or other qualified repair shop).

28
Overheat condition
Check the cooling fans & circuits.

31
ECM control unit
ECM input signal is beyond "normal" range (See a dealer service department or other qualified repair shop).

32
EGR function
EGR control valve does not operate.

33
Oxygen sensor
Oxygen sensor circuit is open.

34*
Knock sensor
Knock sensor circuit is open or shorted.

35
Exhaust gas temperature sensor
Exhaust gas temperature sensor circuit is open or shorted.

36
EGRC-BPT valve problem
Check this component & its circuit.

37
Closed loop operation
Front oxygen sensor malfunction, or circuit malfunction shorted or open.

41
Intake air temperature
Check sensor & sensor malfunction circuit.

43
Throttle position sensor (TPS)
TPS circuit is open or shorted.

55*
EFI system
Normal operation. No problems are detected.

65
Misfire on cylinder 4
Check #4 spark plug wire and cap terminal.

66
Misfire on cylinder 3
Check #3 spark plug wire and cap terminal.

67
Misfire on cylinder 2
Check #2 spark plug wire and cap terminal.

68
Misfire on cylinder 1
Check #1 spark plug wire and cap terminal.

71
Random misfire
Check ignition system components.

72
Catalytic converter system problem
Refer the vehicle to a specialist.

76
Fuel injection system problem
Refer the vehicle to a specialist.

77
Rear oxygen sensor problem
Check the component and its circuit.

82
Crankshaft position sensor signal problem
Check the component and its circuit.

84
A/T diagnostic communications line
Refer vehicle to an automatic transaxle specialist.

91
Front oxygen sensor heater problem
Check the component and its circuit.

95
Crank P/S COG
Refer the vehicle to a specialist.

98
Coolant temperature sensor out of range
Check the component & its circuit.

103
Park / neutral switch malfunction
Refer vehicle to an automatic transaxle specialist.

105
EGRC solenoid
Check the component and its circuit.

111
Inhibitor switch
Refer vehicle to an automatic transaxle specialist.

112
Vehicle speed sensor, A/T
Refer vehicle to an automatic transaxle specialist.

113
A/T first signal
Refer vehicle to an automatic transaxle specialist.

114
A/T second signal
Refer vehicle to an automatic transaxle specialist.

115
A/T third signal
Refer vehicle to an automatic transaxle specialist.

118**
Shift solenoid, A/T
Refer vehicle to an automatic transaxle specialist.

121**
Shift solenoid, A/T
Refer vehicle to an automatic transaxle specialist.

123
Overrun clutch, A/T
Refer vehicle to an automatic transaxle specialist.

124
Torque converter clutch
Refer vehicle to an automatic transaxle specialist.

125
Line pressure, A/T
Refer vehicle to an automatic transaxle specialist.

126
Throttle position sensor, A/T
Refer vehicle to an automatic transaxle specialist.

127
Engine speed signal to A/T
Refer vehicle to an automatic transaxle specialist.

128
A/T fluid temperature sensor
Refer vehicle to an automatic transaxle specialist.


* These codes do not illuminate the check engine light, but it is possible to retrieve them from the ECU.

** The Haynes manual has these two codes listed this way.


If your car was made before 1995 you will have a smaller subset of the 1995 codes.

My Car which was made in 1990 has several different diagnostics procedures, one for the ECCS, one for the Transmission, one for the HICAS, and even one for the Climate Controll system. the HICAS one is really cool as you get to see the back wheels turn.  ;D

thats it for now.

E34 M5 Conversion.

Offline Cloud

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Re:Nissan Diagnostics
« Reply #5 on: May 16, 2002, 09:29:17 PM »
I bet toppa top regretted asking for those codes. Unless he's a technical person
When i'm good i'm good, but when i'm bad i'm even better

Offline Toppa-Top

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Re:Nissan Diagnostics
« Reply #6 on: May 17, 2002, 05:08:26 PM »
Phew.....I can just see it now.....


1 long flash, 2 long flash, 3 long flash, 4 long..no wait that was a short or was it long......arrgggghhhh!!!!

;D ;D ;D

Gonna try it on my old sunny, if it even has a diagnostics port ::) ::)


Thanks for the info though, never know when I might just wanna verify a mechanic or even the dealer!!!! >:(


Offline Toppa-Top

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Re:Nissan Diagnostics
« Reply #7 on: May 17, 2002, 05:11:05 PM »
By the way are there any aftermaket diagnostics that I can just buy and plug on.... ???

Offline Grandel

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Re:Nissan Diagnostics
« Reply #8 on: May 22, 2002, 08:26:16 AM »
had difficulty shorting out the panel...
den i realised mine was flip mode to the diagram..

|oo|oo|ox|x|
|oo|oo|oo|o|

shorted it out... got 5 long and 5 short...
so mih criss

Offline Toppa-Top

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Re:Nissan Diagnostics
« Reply #9 on: May 22, 2002, 09:19:16 AM »
Zeen ....how did the car feel after the ECU reset???

Offline Boomer

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Re:Nissan Diagnostics
« Reply #10 on: May 22, 2002, 10:07:01 AM »
I forgot to mention this but on Newer Nissans say 1993 up the Computer has 2 diagnostic modes, I already described mode 1 which is a pure diagnostic mode, but once in Mode 1 and if you start the Car, you go into Mode 2, which monitors the Oxygen sensor in closed loop operation and displays the results using the check engine light, check engine light on when rich off when lean.

E34 M5 Conversion.

Offline MONTii

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Re: Nissan Diagnostics
« Reply #11 on: September 13, 2005, 09:48:14 PM »
bump
ERROR DOES NOT BECOME TRUTH BY REASON OF MULTIPLIED PROPAGATION, NOR DOES TRUTH BECOME ERROR BECAUSE NOBODY SEES IT.

Offline shift_of_legend (GARD)

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Re: Nissan Diagnostics
« Reply #12 on: September 13, 2005, 10:03:05 PM »
Could you post this in the "Nissan Tech Centre" thread at the top of the Nissan section please?

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Re: Nissan Diagnostics
« Reply #13 on: September 23, 2005, 08:32:13 AM »
Hey thanx Boomer... that diagnostics thing worked perfectly. Both Mode 1 & 2. Mode 1: 5 long and 5 short flashes = everything's fine  [thumbsup]. Mode 2, wanted to check if O2 sensor was working properly: flashes on and off as I steadily revved the engine, on idle it comes on and off every now and then, (like a mini lean rich gauge)   [2thumbsup] = working fine as well.

One thing though, could you break down those other codes a little (in terms of flashing lights) so that they're easier to understand?

P.S. Got a '95 Bluebird.