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.
ECM Circuit Resistance
Before installing ECM, resistance of designated circuits should be checked or ECM may be damaged. See ECM CIRCUIT RESISTANCE table. Check resistance with ignition off, connector installed on components and connector removed from ECM.
| Circuit | (1) ECM Connector Terminals (Wire Colors) | Ohms | ||||
|---|---|---|---|---|---|---|
| Fuel Injector | G8-G17 RED & YEL) | 1-2 | ||||
| EGR & Throttle Opener VSV | Y8-G14 LT GRN/RED & LT GRN/WHT) | 63-77 | ||||
| Fuel Pump & Main Relay | G15-G16 BLU & PNK) | 124-153 | ||||
| ISC Solenoid Valve | G6-G11 LT GRN/BLK & BLK/YEL) | 11-14 | ||||
| Lock-Up Relay A/T Models) (2) | G1-Y11 BLU/BLK & WHT/YEL) | 90-110 | ||||
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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.
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