Electronic control
Removal and installation of engine intake partsHazard warning switch circuit
Description
When the hazard warning signal switch is turned on, the turn signal flasher
relay (marking: flsh) in the
main body ecu turns on to flash the hazard warning signal lights.
Wiring diagram
Inspection procedure
Perform active test by intelligent tester
Connect the intelli ...
Ecm power source circuit
Description
When the ignition switch is turned on, the battery voltage is applied to the
igsw of the ecm. The output
signal from the mrel terminal of the ecm causes a current to flow to the coil,
closing the contacts of the
integration relay (efi main relay) and supplying power to either term ...
Check for intermittent problems
Check for intermittent problems
Hint:
A momentary interruption (open circuit) in the connectors
and/or wire harness between the sensors and ecus can
be detected by using the ecu data list function of an
intelligent tester.
Turn the ignition switch off and connect the
intelligent test ...