LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Isuzu >> 1990 >> Pickup 2WD L4-2.3L (4ZD1) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Throttle Full Close Switch >> Testing and Inspection
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Throttle Full Close Switch: Testing and Inspection

Idle Switch Testing:






1. Disconnect idle switch vacuum hose and electrical connector.

2. With an ohmmeter, ensure that there is no continuity between switch connector positive and negative terminals.

3. With a hand vacuum pump, apply the specified vacuum and check that there is now continuity between the switch terminals.

4. Replace the switch if it fails these tests.