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.
1990 Lexus ES 250 AutomaticFACTORY OEM SERVICE PROCEDURE
Cold Start System: Notes
- Turn ignition off. Disconnect cold start injector electrical connector. See Fig 1. Using a DVOM, measure resistance between cold start injector terminals. Resistance should be 2-4 ohms. If resistance is not as specified, replace cold start injector.
- Disconnect negative battery cable. Remove cold start injector from engine. Place cold start injector into a container to catch fuel spray. Turn ignition on. DO NOT start engine.
- Using a jumper wire, connect terminals FP and +B of check connector. See Fig 2. Connect battery voltage to cold start injector terminals.CAUTION: Apply battery voltage to cold start injector and observe fuel spray as quickly as possible.
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.
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