Tacoma 4WD L4-164.4 2693cc 2.7L DOHC (3RZ-FE) (1996)
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Fuel Injector: Testing and Inspection
On-Vehicle
1. INSPECT INJECTOR OPERATION.
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Check operation sound from each injector.
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With the engine running or cranking, use a sound scope to check that there is normal operating noise in proportion to engine speed.
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If you have no sound scope, you can check the injector transmission operation with your finger.
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If no sound or unusual sound is heard, check the wiring connector, injector or injection signal from the ECM.
2. INSPECT INJECTOR RESISTANCE.
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Remove the throttle body.
(See throttle body removal)
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Disconnect the injector connectors.
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Using an ohmmeter, measure the resistance between the terminals.
Resistance: At 20°C (68°F): 12 - 16 Ohms
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If the resistance is not as specified, replace the injector.
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Reconnect the injector connectors.
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Reinstall the throttle body.
(See throttle body installation)