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Toyota Workshop Service and Repair Manuals

Fuel Injector|Service and Repair > < Injection Inspection|Page 1488
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Fuel Injector: Testing and Inspection
On-Vehicle

ON-VEHICLE INSPECTION: 

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 a 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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Disconnect the injector connector.

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Using an ohmmeter, measure the resistance between the terminals.

Resistance At 20°C (65°F):  13.4 - 14.2 Ohms 

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If the resistance is not as specified, replace the injector.

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Reconnect the injector connector.

Fuel Injector|Service and Repair > < Injection Inspection|Page 1488