Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSISUZU1985I-MARK 2D HATCHBACK, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMEGR SYSTEM - DIESELCOMPONENT TESTINGELECTRONIC EGR CONTROLLER
1985 Isuzu I-Mark 2D Hatchback, Standard
Electronic EGR Controller
1985 Isuzu I-Mark 2D Hatchback, StandardSECTION Electronic EGR Controller
- Using a voltmeter, connect positive lead to the Black/Green wire at the vacuum switching valve wiring connector. Connect negative test lead to Black/Yellow wire.
- Check for 12 volts to vacuum switching valve(s) when engine speed is more than 1200 RPM. If not, replace EGR controller.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.