B Series Truck 4WD L4-2606cc 2.6L SOHC (1992)
Data Link Connector: Testing and Inspection
Test Connector
The Test Connector is a green, one pin connector located in the engine compartment. When grounded, the test connector activates the self-diagnostic
system and causes the dash mounted "CHECK" light to flash malfunction codes (California vehicles only).
Test connector signal can be checked at ECU terminal 1E. When ignition is switched "ON," MIL lamp should light for three seconds with terminal
voltage reading below 2.5V. After three seconds, the MIL lamp should go out with terminal voltage now reading approximately 12V.
