schott1984 Posted May 8, 2007 Share Posted May 8, 2007 So, my being as stubborn as I am, I ran my car really low on gas yesterday. I was watching, waiting for the low fuel light to come on while driving on the highway, and suddenly, the check engine light came on. I fueled up after work, it stayed on. However, later that night at some point it went off. But this morning it's on again. Any ideas? Can you check the codes on these cars by jumpering pins like some american cars? Quote Link to comment Share on other sites More sharing options...
sc300tt Posted May 8, 2007 Share Posted May 8, 2007 Can you check the codes on these cars by jumpering pins like some american cars? yes you can, somewhere under the hood. not 100% sure of where to jump though. local autoparts stores can scan it also, at least they do here in tx. after driving 60+ miles though the computer will reset if nothing is wrong, also could possibly be needing a new gas cap/ o ring. hope this helps. Quote Link to comment Share on other sites More sharing options...
jzz30 Posted May 11, 2007 Share Posted May 11, 2007 most likely an O2 sensor issue but you can jump the check connector and get codes. Quote Link to comment Share on other sites More sharing options...
schott1984 Posted May 11, 2007 Author Share Posted May 11, 2007 Can someone point me in the direction of somewhere that shows where to jump, and how it all works and what the codes are? Quote Link to comment Share on other sites More sharing options...
jsi4u2nv Posted May 12, 2007 Share Posted May 12, 2007 for all 95 and earlier OBD1 models, there is a diagnostic connector inside the car, driver side, under the dash. The pins to jump would be labeled E1 and TE1.... jump these pins together with a paperclip or wire, then turn on ignition, and count flashes of the check engine light. long flash then quick flash. example: 2 long flashes, 4 quick flashes = 24 Here's the breakdown: Lexus Code Retrieval Accessing Diagnostic Trouble Codes The check engine warning light will come on when the ignition switch is turned On and the engine is not running. When the engine is started, the check engine warning light should go off. If light remains on, the self-diagnosis system has detected a fault in the system. Battery voltage must be 11 volts or more. Throttle valve must be fully closed. Transmission must be in Neutral position. All accessories must be turned Off. On pre-OBD II models, turn ignition to On, then use a jumper wire to connect terminals TE1 and El of the data link connector, located under the left hand side of the instrument panel. Codes are indicated by the number of flashes of the check engine warning light. Reading Trouble Codes If the ECU has detected a system malfunction, the check engine light will blink every .5 second. The first number of blinks will equal the first digit of a two digit diagnostic trouble code and after a 1.5 second pause, the second number of blinks will equal the second digit of same diagnostic trouble code. If there are two or more DTC's, there will be a 2.5 second pause between each. After all DTC's have been output there will be a 4.5 second pause and all DTC's will be repeated as long as the terminals TE1 and El of the data link connector are connected. In the event of two or more DTC's, indication will begin from smaller numbered code and continue in order to the larger. After all DTC have been recorded, remove jumper wire. Clearing Trouble Codes After service, the diagnostic trouble code or DTC's retained in the ECU memory must be cleared by remove the EFI fuse for approximately 10 seconds or more, depending on ambient temperature (the lower the temperature, the longer the fuse must be left out) with the ignition switch off. DTC clearing can also be done by removing the battery ground cable, other memory systems (clock) will also be cleared. If the diagnostic trouble code is not cleared, it will be retained by the ECU and appear along with a new DTC in future trouble codes. If it is necessary to work on engine components requiring removal of the battery ground cable, confirm no DTC's are stored. After clearing codes, road test the vehicle to check that a normal operation. If the same diagnostic trouble code appears, the trouble has not been corrected. OBD1 codes: 12 RPM Signal 13 RPM Signal 14 Ignition Signal 15 Ignition Signal 16 Electronically Controlled Transmission Control Signal 17 CMP No. 1 18 CMP No. 2 21 Main O2S & Heater Signal 22 ECT Sensor Signal 24 IAT Sensor Signal 25 Air–Fuel Ratio Lean Malfunction 26 Air–Fuel Ratio Rich Malfunction 27 Sub O2S Signal 28 Main O2S 29 Sub O2S 31 & 32 Air Flow Meter Signal 35 HAC/Barometric Pressure Sensor Signal 41 TP Sensor Signal 42 VSS Signal 43 Starter Signal 47 Sub TP Sensor 48 Secondary Injection System Malfunction 51 Switch Condition Signal 52 KS Signal 53 Knock Control Signal 55 KS Signal 70 EGR System Malfunction 71 EGR System Malfunction 78 Fuel Pump Control Hope this helps! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.