Ignition Timing Connector: Description and Operation

Duty Check Data Link Connector:

DIAGNOSTIC REQUEST TERMINAL
The diagnostic request terminal is located in the duty check data link connector. The duty check data link connector is located in the engine compartment by the LH strut tower. When the diagnostic request terminal is grounded, a diagnostic request signal is fed to the Powertrain Control Module (PCM), which then outputs the ISC duty (throttle valve opening) through the duty check terminal.

TEST SWITCH TERMINAL
The test switch terminal is included in the duty check data link connector. When this terminal is grounded, the Powertrain Control Module (PCM) sets the ignition timing to base timing.

When both the test switch terminal and the diagnostic request switch terminal are grounded simultaneously, the PCM outputs air/fuel duty through the duty check terminal.

Legend
1. Blank
2. Diagnostic Request Terminal
3. Blank
4. Ground Terminal
5. Test Switch Terminal
6. Duty Check Terminal
7. Duty Check Data Link Connector
8. Fuel Injector Resistor