check engine light on Options

[my96celica]

Hello celica lovers I'm having a little problem wit me car the check engine light is on but I dont know how to check it.I've seen it tested before just forgot how sumthing about engine codes read off how many times ur engine light flashes so any help on how I can check it myself I would be thankful

[xs94st]

you can do it very easily.

open your hood and look for the DIAGNOSTIC box that is located next to the master cylinder (USDM) which is on the driver's side.

get a paper clip and slide one end into the T1 terminal and the other end into the E1 terminal. turn car to the on position and the check engine will flash the code.

[GriffGirl]

Viola!
Here are similar PDFs to download for your own use (note this is for a 1994 Celica, I'm not sure if it varies for newer models):
Tests with Codes 1.8L
Tests with Codes 2.2L

Reading Diagnostic Codes

Below are instructions on how to determine what diagnostic codes are stored in your engines computer. This can be very useful in locating the source of a problem when your check engine light comes on.



Note: This procedure may not be correct for all Celicas. I do not know whether or not this is correct for RWD Celicas and OBD2 (1996-current) Celicas. Please try at your own risk.

1. Check your battery voltage (should be greater than 11 volts), turn off all accessories, put your car in neutral, and make sure your car is at operating temperature.
2. Jump the terminals TE1 and E1of the "Data Link Connector 1" with a jumper wire (a paperclip will do).
3. Turn the ignition to "On" (but dont start the car)
4. Read the trouble code by watching the flashes of the check engine light

Sample Trouble Codes: These codes are for a 6th Gen. Celica...They may, however, be similar and/or carry over to other cars.


Code Blink Circuit
n/a 8 flashes normal
12 1, then 2 G, NE signal (#1)
13 1, then 3 G, NE signal (#2)
14 1, then 4 Ignition Signal Circuit
16 1, then 5 A/T Control Signal
21 2, then 1 Oxygen Sensor Signal
22 2, then 2 Engine coolent Temp Sensor Signal
24 2, then 4 Intake Air Temperature Sensor
25 2, then 5 Air/Fuel Ratio Lean Malfunction
26 2, then 6 Air/Fuel Ratio Rich Malfunction
27 2, then 7 Sub-Oxygen Sensor signal
31 3, then 1 MAP sensor
41 4, then 1 Throttle Position Sensor signal
42 4, then 2 Speed Sensor Signal
43 4, then 3 Starter Signal
51 5, then 1 Switch condition signal
52 5, then 2 Knock Sensor
71 7, then 1 EGR System

This post has been edited by GriffGirl: Jan 8, 2008 - 1:34 PM