Toyota 4A-FE Repair Manual page 105

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EFI SYSTEM - Troubleshooting with Volt/Ohmmeter
F14357
F14253
EFI SYSTEM CHECK PROCEDURE
PREPARATION
(a) Disconnect the connectors from the ECU.
{b) Remove the locks shown in the illustration so that the
tester probe(s) can easily come in.
NOTICE: Pay attention to sections "A
11
and "B" in
the illustration which can be easily broken.
(c)
Reconnect the connectors to the ECU.
HINT:
• Perform all voltage measurements with the con-
nectors connected.
• Verify that the battery voltage is 11 V or above
when the ignition switch is ON.
Using a voltmeter with high-impedance (10 kO/V
minimum), measure the voltage at each terminal of the
wiring connectors.