DIY : CHECK ECU for j00 !
Disclaimer: The following is provided as a GUIDE ONLY, and neither myself nor Ozhonda take any responsibility for the outcomes of someone else doing the following. You follow these steps at your own risk!
Hi guys ! Car running not-so-hot ? Most of our cars being Electronically-fuel-injected...any problem that can happen to our vehicles is usually derived from a malfunctioning sensor SOMEWHERE along the line.
So...here is a normally sure-fire way to quickly test your cars ECU , for any ECU codes which can tell of problem areas.
Aim: Here is a normally sure-fire way to quickly test your cars ECU , for any ECU codes which can tell of problem areas - of which is quick , easy and inexpensive which anyone here can do :)
Required: Yourself...and a small paper clip or similar object - such as a length of audio wire , tweezers etc.
http://tech.ozhonda.com/diy/eg_ecu/IMG_4391.jpg
As shown , I have choosen to use a paper clip stretched around to make a nice lil connecting handle of sorts.
Steps:
First , produce the DIY connector pin.
Next , place keys into your ignition , turned completley OFF.
Locate the 2 wire connector , located in the left-hand-side , inbetween the ECU location , and the bottom-left lip of the glove compartment.
http://tech.ozhonda.com/diy/eg_ecu/IMG_4394.jpg
Pull yourself underneath this are as it will be alittle hard to locate - look for a large bright green *shown* connector holder - and pull out the connector with the 2 wires , one been brown , and the other is green and white.
http://tech.ozhonda.com/diy/eg_ecu/IMG_4393.jpg
Next , place the DIY clip-connector into the 2 small bottom holes of the connector - completing the circuit and enabling the ECU's scan mode.
http://tech.ozhonda.com/diy/eg_ecu/IMG_4395.jpg
Finally...places your hands upon the ignition key- turn to ON *not start* - as you usually do to enable the fuel pump etc.
http://tech.ozhonda.com/diy/eg_ecu/IMG_4397.jpg
The engine check light should now come on either numerous times , or hopefully not at all - signifying one or more ECU codes that your engine is currently experiencing...letting you source the problem and replace say a sensor before it costs u alot of $$$
To READ the codes , observe the amount of "blips" and type - for example , a code 6 *ECT* would be like - "...blip...blip...blip..blip...blip...blip...S TOP" *repeat*
A code 23 would be ofcourse 2 long blips followed by 3 single blips in a row , then a short pause before repeating OR throwing another code.
IT is perfectly possible to have multiple codes - for example - code 3 + code 17 + code 6....would be represented by 3 blips *PAUSE* then 1 long blip then 7 short blips *PAUSE* then another 6 short blips. *repeat*
Other comments
Below , is the basic codes relative to MY civic - and pretty much most hondas from 92-00.
If in doubt...take it to a mechanic !
1 O2A - Oxygen sensor #1
2 O2B - Oxygen sensor #2
3 MAP - manifold absolute pressure sensor
4 CKP - crank position sensor
5 MAP - manifold absolute pressure sensor
6 ECT - water temperature sensor
7 TPS - throttle position sensor
8 TDC - top dead centre sensor
9 CYP - cylinder sensor
10 IAT - intake air temperature sensor
12 EGR - exhaust gas recirculation lift valve
13 BARO - atmospheric pressure sensor
14 IAC (EACV) - idle air control valve
15 Ignition output signal
16 Fuel injectors
17 VSS - speed sensor
19 Automatic transmission lockup control valve
20 Electrical load detector
21 VTEC spool solenoid valve
22 VTEC pressure valve
23 Knock sensor
30 Automatic transmission A signal
31 Automatic transmission B signal
36 traction control found on JDM ecu's
41 Primary oxygen sensor heater
43 Fuel supply system
45 Fuel system too rich or lean
48 LAF - lean air fuel sensor
54 CKF - crank fluctuation sensor
58 TDC sensor #2
61 Primary oxygen sensor
63 Secondary oxygen sensor
65 Secondary oxygen sensor heater
71 random misfire cylinder 1
72 random misfire cylinder 2
73 random misfire cylinder 3
74 random misfire cylinder 4