Diagnosing Nissan Fault Codes [Skyline/Stagea] using the paperclip trick

I thought id do a quick write up on this as its helped me before in the past and I’m about to do it again this weekend to find out if I have another possible issue with my stag, maybe I’m just paranoid limp mode is coming back! I thought I had a big electrical problem, the paperclip trick told me it was the MAF, cleaned it, and it was good again.

With the earlier Stageas they have a consult plug in amongst the fuses in the dash that can be read to try and diagnose issues with the car. No OBD2, consult ports were used in Nissans right up to the R34. [well, as far as I have read!]

Code 55 is what you want – because that’s all clear 😊 [unless there’s something seriously wrong with your car, then 55 would be the worst code to get lol]

And its easy!!

1. Remove the coin tray, on the right-hand side of the steering wheel. Roughly around where your knee sits.

2. Remove the consult plug off its clip so you can pull it out to access it
   

3. Have car switched off and wheels facing straight forward

4. Get a paperclip [I use wire with the ends stripped] and bridge these holes
   

5. Turn car onto reds for 3 seconds and pull the paperclip out

6. The engine light will start flashing the error codes [excuse the terrible video!]

It will flash the first number, pause, then flash the second number. If you have multiple fault codes they will flash one after the other, so say a 13 and a 12 will flash a one, pause, flash three times, pause, flash once, pause, flash twice. I have read [unconfirmed] it can show up to 9 different fault codes in a row, so noting it down as its reading to you is probably a good idea, lest restarting the whole process of trying to figure out where its up to in the errors, lol.

And lastly, after doing the fix I leave my battery DC for the night to reset my computer.

It comes in very handy, it doesn’t give you the direct answer always, but it points you in the right direction 😊

Nissan ECU Diagnostic Codes: [not complete list]

11 Crankshaft position sensor
12 MAF sensor circuit (air flow meter)
13 Coolant temperature circuit
14 Vehicle speed sensor circuit
21 Ignition circuit
22 Fuel Pump
31 ECU
34 Knock sensor
43 Throttle position circuit
45 Injector leak
51 Ignition circuit
54 Auto signal to ECU
55 All OK

Above is the list I have seen floating many times around the Stagea groups and I use it myself, ive never got a code that wasn’t in that list, however searching SkylinesAustralia brings back a longer list of Skyline codes:

11 - Crank Angle Sensor/Camshaft Position Sensor
12 - Air Flow Meter
13 - Engine Coolant Temperature Sensor
14 - Vehicle Speed Sensor
21 - Ignition Signal
22 - Fuel Pump
23 - Idle Switch
24 - Throttle Valve Switch
25 - Idle Speed Control Valve
26 - Boost Pressure Sensor
27 -
28 - Cooling Fan Circuit
29 -
30 -
31 - ECM
32 - EGR Function
33 - Heated Oxygen Sensor
34 - Knock Sensor
35 - Exhaust Gas Temperature Sensor
36 - EGR Control-Back Pressure Transducer
37 - Knock Sensor
38 - Right hand bank Closed Loop (B2)
41 - Intake Air Temperature Sensor
42 - Fuel Temperature Sensor
43 - Throttle Position Sensor
45 - Injector Leak
47 - Crankshaft Position Sensor
51 - Injector Circuit
53 - Oxygen Sensor
54 - A/T Control
55 - No Malfunction
63 - No. 6 Cylinder Misfire
64 - No. 5 Cylinder Misfire
65 - No. 4 Cylinder Misfire
66 - No. 3 Cylinder Misfire
67 - No. 2 Cylinder Misfire
68 - No. 1 Cylinder Misfire
71 - Random Misfire
72 - TWC Function right hand bank
76 - Fuel Injection System Function right hand bank
77 - Rear Heated Oxygen Sensor Circuit
82 - Crankshaft Position Sensor
84 - Automatic Transmission Diagnostic Communication Line
87 - Canister Control Solenoid Valve Circuit
91 - Front Heated Oxygen Sensor Heater Circuit right hand bank
94 - TCC Solenoid Valve
95 - Crank Position Cog
98 - Engine Coolant Temperature Sensor
101 - Front Heated Oxygen Sensor Heater Circuit right hand bank
103 - Park/Neutral Position Switch Circuit
105 - EGR and EGR Canister Control Solenoid Valve Circuit
108 - Canister Purge Control Valve Circuit
111 - Inhibitor Switch
112 - Automatic Transmission Speed Sensor
113 - Automatic Transmission 1st Signal
114 - Automatic Transmission 2nd Signal
115 - Automatic Transmission 3rd Signal
116 - Automatic Transmission 4th Signal
118 - Automatic Transmission Shift Solenoid Valve A
121 - Automatic Transmission Shift Solenoid Valve B
123 - Automatic Transmission Overrun Clutch Solenoid Valve
124 - Automatic Transmission TOR Conv Solenoid Valve
125 - Automatic Transmission Line Pressure Solenoid
126 - Automatic Transmission Throttle Position Sensor
127 - Automatic Transmission Engine Speed Signal
128 - Automatic Transmission Fluid Temperature Sensor

SkylinesAustralia

Hope this helps somebody! And posting this will save me trying to re-find the info and codes every time I want to do this lol.

Kenj xx