Nissan ECCS allows you to read any stored fault codes without any specialist equipment.
The diagnostic plug on S15's is located near the drivers right knee behind a small panel.
Please read all the following instructions in full before you attempt to carry a fault code read out.
1. Switch the ignition to the ON position but do not start the car.
2. Depending on its orientation of the consult plug (see below) bridge the two lower left, or upper right pins on the consult plug with the wire paper clip for 5 seconds, then remove the bridge.
3. Observe and write down the sequence of flashes produced by the engine check light in the combination meter.
4. Once you are satisfied you have all the fault codes, bridge the consult pins again (basically, repeat step 2) and this will erase any stored fault codes and revert the ECU back its normal operation. It is important you carry out this part or the ECU will continue to repeat the stored codes.
Understanding the fault code readout:
ECU fault codes are displayed on the engine check light in the combination meter and are displayed by the number of flashes as well as the speed of the flashes.
For example, an ECU showing no recorded faults will display code 55. The first digit is shown as 5 long flashes (tens) followed by a pause and followed by the second digit - 5 short flashes. Thus Code 55.
11 - Crank Angle Sensor/Camshaft Position Sensor.
12 - Air Flow Meter/Mass Air Flow Sensor.
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.
28 - Cooling Fan Circuit.
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.
73 - TWC Function right hand bank.
76 - Fuel Injection System Function right hand bank.
77 - Rear Heated Oxygen Sensor Circuit.
82 - Crankshaft Position Sensor.
84 - A/T Diagnosis Communication Line.
85 - VTC Solenoid Valve Circuit.
86 - Fuel Injection System Function right hand bank.
87 - Canister Control Solenoid Valve Circuit.
91 - Front Heated Oxygen Sensor Heater Circuit right hand bank.
94 - TCC Solenoid Valve.
95 - Crankshaft Position Sensor.
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
This guide comes to you courtesy of craig8585 and justin666 via the S15 Owners Club.