Diesel Data: Automotive Repair

System Check Procedure

EFI SYSTEM CHECK PROCEDURE

Preparation

1. Remove the ECU cover under the center console.
2. Remove the ECU with the harness.

NOTE:




1. The EFI circuit can be checked by measuring the voltage at the wiring connectors of the ECU.
2. Perform all voltage measurements with the connectors connected.
3. Verify that the battery voltage is 11 V or above when the ignition switch is ON.

Voltage Measurement

Using a voltmeter with high-impedance (10 kohm/V minimum), measure the voltage at each terminal of the wiring connector.




Connector View/Terminal Identification




Standard Values

NOTE: If there is any problem, refer to numbers listed on left hand side of standard values chart.

Resistance Measurement

CAUTION:
Do not touch the ECU terminals.
The tester probe should be inserted into the wiring connector from the wiring side.


Check the resistance between each terminal of the wiring connectors.




^ Disconnect the connectors from the ECU.
^ Measure the resistance at each terminal.




Resistance Values