toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

Component Tests and General Diagnostics|Page 1152 > < Component Tests and General Diagnostics
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Engine Control Module: Pinout Values and Diagnostic Parameters

INSPECTION OF ECU (Electronic Controlled Unit)

1. INSPECT VOLTAGE OF ECU 

NOTE:  The EFI circuit can be checked by measuring the and voltage at the wiring connectors of the ECU.

Check the voltage between each terminal of the wiring connectors.
^

Turn the ignition switch.

^

Measure the voltage at each terminal.

NOTE: 
^

Perform all voltage measurements with the connectors connected.

^

Verify that the battery voltage is 11V or more when the ignition switch is ON.

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