1994 toyota 4runner check engine light. Do not start engine. Toyota 4runner forum largest 4runner forum toyota 4runner forum 3rd gen t4rs check engine light. Check engine light circuit is functional.
Check engine light came on on the way home from canyonlands and the code read system too lean. In some cases you need to pull over immediately to prevent damage while in others you merely need to tighten you gas cap next time you stop in order to reset the service engine soon light. Once those two pins are connected you can turn the key in the ignition without starting the engine and the check engine light will flash.
Test mode will not be activated if the dlc terminals are connected after the ignition switch is turned on. If your check engine light is on you may have a defective o2 sensor that needs to be replaced. A check engine light can indicate a broad spectrum of problems with your 1994 toyota 4runner.
07 18 2006 0147 pm 1. T100 pickup jump dlc terminals te2 and e1 with a short lead 2. When retrieving toyota check engine light codes with an obd ii scan tool proceed as follows.
Turn the ignition on. This engine component measures the amount of unburned oxygen in your exhaust system. 4runnerpickup jump dlc terminals te2 and e1 with a short lead 1.
The connector may have a removable cover. If not replaced this can lead to lower fuel economy ratings damaged spark plugs a damaged catalytic converter and excess fuel burn. Throttle valve is fully closed throttle position sensor idl points closed.
Battery voltage is above 11 volts. Count out the number of flashes until there is a pause then count out the next series of flashes. It should be on when the ignition switch is on with the engine stopped.
Connect scan tool to the 16 pin data link connector dlc located underneath the steering column.