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 MANUALSTOYOTA19904RUNNER 2D UTILITY, 3.0 V, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTS - EFIFUEL SYSTEMSCOLD START INJECTOR TIME SWITCH TEST
1990 Toyota 4Runner 2D Utility, 3.0 V, Automatic
Cold Start Injector Time Switch Test
1990 Toyota 4Runner 2D Utility, 3.0 V, AutomaticSECTION Cold Start Injector Time Switch Test
- Unplug cold start injector time switch connector. For cold start injector time switch location, refer to appropriate illustration in the appropriate THEORY/OPERATION article.
- Using ohmmeter, check resistance between terminals "STA" & "STJ" at appropriate temperature. See Fig 1. See COLD START INJECTOR TIME SWITCH SPECIFICATIONS table. There should be continuity between terminal "STA" and ground. Replace switch if not within specification.
NOTE:
"STA" terminal is fed current from ignition switch during cranking. "STJ" goes to cold start injector.
COLD START INJECTOR TIME SWITCH SPECIFICATIONS
| Application | Ohms | Condition |
|---|---|---|
| 22R-E | 30-50 | Below 50°F (10°C) |
| 22R-E | 70-90 | Above 77°F (25°C) |
| 22R-E | 30-90 | "STA" To Ground |
| 3VZ-E | 30-50 | Below 50°F (10°C) |
| 3VZ-E | 70-90 | Above 77°F (25°C) |
| 3VZ-E | 30-90 | "STA" To Ground |
RENDER: 1.0x
NO RELATED
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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.