Data Link Connector for B Series Truck 2WD L4-2184cc 22L: Description and Operation
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.
Test connector signal can be checked at ECU terminal 1B. When ignition is switched "ON" and connector is grounded, terminal voltage should be 0V.
With connector not grounded, voltage should be approximately 12V.
