HOW TO USE THE INSPECTION
PROCEDURES
Many causes of the
problems occurring in electric circuitry are
generally the connectors, components, the ECU, the wiring harnesses
between connectors, in that
order. These inspection procedures follow this order. They first try to
discover a problem with
a connector or a defective component.
![](../../../img/00/AC701738AC00ENG.png)
CURRENT TROUBLE
Indicates that
the status is "Active" and the trouble is currently present. Carry out
troubleshooting
as described in the applicable inspection procedure.
PAST TROUBLE
Indicates that the
status is "Stored" and the trouble is historic. Since the trouble may
still be present, set the vehicle to the diagnosis code detection
condition and check that the
status changes to "Active". If the status does not change from "Stored",
observe the applicable
inspection procedure with particular emphasis on connector(s) and wiring
harness.
HARNESS CHECK
Check
for an open or short circuit in the harness between the terminals which
are faulty according
to the connector measurements. Carry out this inspection while referring
to the Electrical Wiring Manual.
Here,
"Check the wiring harness between the power supply and terminal xx" also
includes checking
for blown fuse. For inspection service points when there is a blown
fuse, refer to "Inspection
Service Points for a Blown Fuse
."
MEASURES TO TAKE AFTER REPLACING THE ECU
If the
trouble symptoms have not disappeared even after replacing the ECU,
repeat the
inspection procedure from the beginning.