Recently, I made datalogger cable to connect Toyota ECU with DLC1 or DLC2 to computer via serial port.
Scheme:
ECU –> DLC1 –> Serial Port –> USB to Serial Cable –> Computer –> Datalogger Software
What is DLC1?
DLC1 (Data Link Connector 1) is the type of terminal which is used in early Toyota Car. DLC1 Year range: 1990-2000. DLC2 Year Range: 1988-1996.
Electrical Schematic:
Datalogger Software:
CarTester8000 which is made and maintained by Russian Toyota Carina Forum.
Download Link: http://primavistalab.com/files/CarTester8000StableEdition_English.zip
Tested On:
1. Toyota Corolla AE111 1996 with 4AFE Engine
2. Win7 64-bit with BAFO USBtoSerial DB9
Result:
It works!
Other Sources:
http://www.clublexus.com/forums/performance-and-maintenance/664196-free-toyota-pre-obd-datalogger-found.html
http://toyota.kgbconsulting.ca/wiki/OBD-1_Serial_Interface
Corat Coret Zainal 
wuaduhhh ga ngerti hahah
Hello.
Thanks for you article.
Could you maybe tell me, exactly how did you connect the RS232 to the DLC1? Could you make a pin-for-pin diagram?
Regards,
Casper
Hi Casper,
Sorry for very late reply.Pin for pin diagram is already upthere.
I could not find male socket of DLC1. So that i manually connect it by pin. Used pins are VF1, E1 & TE2.
hye.. nice article. Why do you use pin 6 (DTR) for receiving signal from the dlc, instead of pin 3 (RXD) by convention? is the electrical properties compatible between the DLC and RS232?
I didnt try to connect to RX pin, lookslike it is datalogger requirement to connect it to DTR pin. Although we actually know that we send data signal not dtr signal.