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.
1989 Geo Tracker Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Tracker ECM Resistance
ECM CIRCUIT RESISTANCE CHECK (TRACKER) (1)
| Circuit | ECM Connector Terminals | Ohms | |||||
|---|---|---|---|---|---|---|---|
| Control Relay | G16-440 (2) | 114-140 | |||||
| EGR VSV & Throttle Opener VSV | G5-G14 | 70-80 | |||||
| Fuel Injector | G8-G17 | 1-2 | |||||
| ISC Solenoid Valve | G6-G15 | 5-7 | |||||
| Lock-Up Relay & PTC Heater Relay | Y10-Y11 | 180-220 | |||||
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Factory Service Tools
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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.