Checking Engine Diagnostic Code for your AE86
do-boy & Brian
Step 1 - short terminals T and E1
Step 2 - turn engine on
Step 3 - watch your check engine light make pretty flashes
Step 4 - refer to FSM (Field Service Manual) for code
If you can't find the diagnostic connector on the Kouki (late
model) then go fishing. It's supposed to be on a clip on the firewall
near the wiper motor (LHD cars). But sometimes it falls down and hangs
underneath the intake manifold...
The Zenki (early model) cars have a yellow two-prong plug that isn't plugged into anything. It should have a black rubber cap covering the plug when not in use. It hangs in the same spot, on the firewall, near the wiper motor.
Tuning Tip: When the check connector is shorted, you should hear the
engine tone change slightly, as it goes into base timing. If the engine
idle doesn't change, you have to check your TPS adjustment.