Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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System Check Procedure

EFI SYSTEM CHECK PROCEDURE





NOTE:
^ Perform all voltage measurements with the connectors connected.
^ Verity that the battery voltage is 11 V or more when the ignition switch is at "ON".
Using a voltmeter with high impedance (10 k ohms/V minimum), measure the voltage at each terminal of the wiring connectors.











ECU TERMINAL IDENTIFICATION AND STANDARD VOLTAGES

If measured voltage does not match STD voltage listed in the chart, proceed with the test number listed in the left column.