Toyota OBD1 Trouble Codes and Fault Code List >> Toyota 87-92 Supra 3.0L Turbo

Accessing – MIL

• Switch ignition ON
• Check MIL illuminates
• Start engine.  Allow to idle.
• If MIL extinguishes, no trouble codes have been recorded.
• If MIL remains illuminated, access trouble codes.

Accessing – without Super monitor display

• Switch ignition ON. Do NOT start engine
• Jump DLC terminals T and E1 with a short lead 1
• Count MIL flashes and compare with trouble code table
• First flashes of 0.5 second duration indicate ‘tens’, after a 1.5 second pause, next flashes of 0.5 second duration indicate ‘units’
• A 2.5 second pause occurs between codes
• After a 4.5 second pause, trouble codes will be repeated
• The MIL flashes once every 0.25 seconds if the system is correct
• Switch ignition OFF
• Remove jump lead

Accessing -with Super monitor display

• Switch ignition ON. Do NOT start engine.
• Push and hold the SELECT and INPUT M keys simultaneously for 3 seconds minimum, DIAG should appear on the screen
• Push and hold the SET key for 3 seconds minimum
• The screen will show if the system is OK or if any trouble codes are recorded 4
• A 3 second pause occurs between codes
• After reading trouble codes either switch ignition OFF or press any key (except SET) to bring clock back
• Switch ignition OFF

Clearing Trouble Codes

• After the faults have been rectified, erase the trouble codes as follows:
• Cressida – remove EFI fuse (15A) from underhood fusebox for 30 seconds minimum
• Supra – remove EFI fuse (15A) from No.2 underhood fusebox for 30 seconds minimum
• Reinstall fuse
• Repeat accessing procedure to ensure no data remains in ECM fault memory

 Trouble Codes