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Old 02-02-2004, 04:17 PM   #1
abosworth
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Member#: 53856
Join Date: Jan 2004
Chapter/Region: NESIC
Location: NoVerm Brah......
Vehicle:
2012 Speed3
Red Mica

Default check engine light

i tried searching to see if anyone else had a problem similar to this with no luck. i have a 1992 legacy 2.2l 4wd. the cel comes on if i drive to the store or something then turn it off for a short while. when i turn it back on the light comes on. it never turns on the first time i start it. if i let it sit for a few hours before i start it again then it is fine. sometimes i can get it to go away if i keep turning it off and on. also, does anyone know generally how much it costs to get an OBD test?
any ideas??
thanks
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Old 02-03-2004, 02:46 AM   #2
joubtt
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Join Date: Mar 2003
Location: San Diego
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04 04 STI
No AWD, Not interested

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I had someone scan my car and IIRC you can get an OBDII scan tool for $200+ but check the sales section to see if ones out there.
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Old 02-03-2004, 07:13 AM   #3
Mulder
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A '92 is not OBDII, it is OBDI. An OBDII scan tool will not work on pre-96 cars which are OBDI.
OBDI interfaces are proprietary/manufacturer-specific and the scanners to read them will generally be available only at dealers. It's possible that some shops may be able to scan it if they have a tool such as the Snap-On scanner with the proper module for your car.
With the OBDI system there is also a method for reading codes without a scanner by putting the ECU in a diagnostic mode and having it display the codes by flashing the check engine light. The procdedure to do this is in the service manual, I don't know it offhand but someone may post it here.
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Old 02-03-2004, 07:01 PM   #4
Raistlin
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Join Date: Nov 2003
Location: Ontario, Canada
Vehicle:
1990 Legacy LS
Blue

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exerpt from haynes repair manual

Code 11(1 long flash, 1 short flash) Crank angle sensor/switch
Code 12(1 long flash, 2 short flashes) Starter switch
Code 13(1 long flash, 3 short flashes) Cam angle sensor
Code 14(1 long flash, 4 short flashes) Fuel Injector # 1
Code 15(1 long flash, 5 short flashes) Fuel Injector # 1
Code 16(1 long flash, 6 short flashes) Fuel Injector # 1
Code 17(1 long flash, 7 short flashes) Fuel Injector # 1
Code 21(2 long flashes, 1 short flash) Coolant temperature sensor
Code 22(2 long flashes, 2 short flashes) Knock Sensor
Code 23(2 long flashes, 3 short flashes) Airflow Sensor
Code 24(2 long flashes, 4 short flashes) Air control Valve
Code 31(3 long flashes, 1 short flash) Throttle position sensor
Code 32(3 long flashes, 2 short flashes) Oxygen Sensor
Code 33(3 long flashes, 3 short flashes) Vehicle Speed Sensor
Code 35(3 long flashes, 5 short flashes) Purge control solenoid valve
Code 41(4 long flashes, 1 short flash) Fuel mixture LEAN
Code 42(4 long flashes, 2 short flashes) Idle Switch
Code 44(4 long flashes, 4 short flashes) Wastegate control solenoid
Code 44(4 long flashes, 4 short flashes) Atmospheric Sensor
Code 49(4 long flashes, 9 short flashes) Airflow sensor
Code 51(5 long flashes, 1 short flash) Neutral Switch (manual)
Code 51(5 long flashes, 1 short flash) Inhibitor (automatic)
Code 52(5 long flashes, 2 short flashes) Parking switch

Hope this helps.
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Old 02-03-2004, 07:02 PM   #5
Raistlin
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1990 Legacy LS
Blue

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oops fuel injector is in order 1,2,3,4 sorry bout that
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Old 02-05-2004, 01:06 AM   #6
joubtt
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No AWD, Not interested

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Thanks Mulder.
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Old 02-05-2004, 06:38 AM   #7
Mulder
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Helpful info Raistlin, but you need to add the procedure for how to put the ECU in diagnostic mode where the light will flash out the codes.
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Old 02-05-2004, 07:36 PM   #8
Raistlin
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1990 Legacy LS
Blue

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another exerpt from haynes repair manual :

<Obtaining OBD I trouble codes (1990 through 1994 models)

Self Diagnosis

7. The self diagnosis mode is useful to diagnose malfunctions in the major sensors and actuators of the electronic fuel injection system. There are four different modes available for diagnosting drivability problems. Only the first mode, U-Check mode is used by home mechanics. The other modes are used by professional mechanics for self diagnosis. It is important to know that these other modes are used to detect drivability problems that store trouble codes because of random faults that may not be easily detected. The U-Check mode covers malfunctions that are constant or easily detected. Sometimes it will be necessary to double-check the symptoms before proceeding with the actual self diagnosics.

8. There are four modes in the self diagnosis system. The computer will illumiate the CHECK ENGINE light when it detects a problem in U-Check mode but not in D-Check mode. Therefore, it is also important to remember that there may be a problem in the system despite the fact that the CHECK ENGINE light is OFF. The D-Check mode level of diagnostics is difficult and is best handled by a professional>

The next few lines describe the different modes and I did not find it necessary to add it here.

<9. Make sure the test mode connector is connected. Note: It will be necessary to partially remove the driver's side trim panel under the dash to expose the diagnostic connectors.

10. Turn the ingnition key ON (engine not running) and make sure the CHECK ENGINE inspection light on the instrument panel is on, If the light is off replace the bulb.

11. Observe the CHECK ENGINE light on the dash. It will flash the trouble codes that have been stored whithin the computer. If the are no trouble codes stored, the CHECK ENGINE light will not flash. If the CHECK ENGINE light on the dash flickers, then the test modes connectors are still plugged together and they must be disconnected to enter the U-Check mode.

12. Observe the CHECK ENGINE light on the dash. It will flash the trouble codes in a clear and distinct manner. The first long flash will represent the first digit of the code designation. Next, the computer will flash the second digit of the code using short flashes. For example, four long flashes will represent the first digit, 4, followed by two short flashes is code 42. Record all the trouble code onto a notpad and observe the computer codes once again to double-check the acuracy as the ECM repeats the list of trouble codes after all the codes have been displayed one time.

Clearing Codes

13. The easiest method for clearing trouble code is simply disconnecting the negative battery terminal and waiting 30 seconds.>

- - phew - - I know it sounds confusing at first but that's the way it's written in the manual. From the illustration i can make out that the connectors are T shaped but it's a line drawing and black & white. I know that mine were located in a bundle under the steering column but that might be different form year to year.

hope this helps a little more
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