Most of connector symbols in wiring diagrams are shown from the terminal side.
For description and how to disconnect, refer to PG section, “Description”, “HARNESS CONNECTOR”.

Connector guides for male terminals are shown in black and female terminals in white in wiring diagrams.

Sample/wiring diagram -example-P0462, P0463 Fuel level sensor
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC P0462 or P0463 is displayed with DTC UXXXX, first perform the
trouble diagnosis for DTC
UXXXX.
If DTC P0462 or P0463 is displayed with DTC P0607, first perform the
trouble diagnosis for DTC
P0607. Refer to EC-350, "DTC Logic".
...
Power supply and ground circuit
Bcm (body control system) (with intelligent key system)
BCM (BODY CONTROL SYSTEM) (WITH INTELLIGENT KEY SYSTEM) : Diagnosis Procedure
Regarding Wiring Diagram information, refer to BCS-51, "Wiring Diagram".
1.CHECK FUSES AND FUSIBLE LINK
Check that the following fuses and fusible link ...
P0125 ECT Sensor
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC P0125 is displayed with P0116, first perform the trouble
diagnosis for DTC P0116. Refer to EC-
196, "DTC Logic".
If DTC P0125 is displayed with P0117 or P0118, first perform the
trouble diagnosis for DTC P0117 or
P0118. Refer to ...