Electrical System

ELECTRICAL SYSTEM

Electrical Parts

Battery cable

Before disconnecting connectors or removing electrical parts, disconnect the negative battery cable. See Procedures.






Connectors

Data link connector

Insert the probe into the service hole when connecting a jumper wire to the data link connector.

CAUTION:Inserting a jumper wire probe into the data link connector terminal may damage the terminal.






Disconnecting connectors

When disconnecting two connectors, grasp the connectors, not the wires.





Connectors can be disconnected by pressing or pulling the lock lever as shown.






Locking connector

When locking connectors, listen for a click indicating they are securely locked.






Inspection

When a tester is used for checking continuity or measuring voltage, insert the tester probe from the wiring harness side.





Check the terminals of waterproof connectors from the connector side since they cannot be accessed from the wiring harness side.

CAUTION:To prevent damage to the terminal, wrap a thin wire around the lead before inserting into terminal.






Terminals

Inspection

Pull lightly on individual wires to check that they are secured in the terminal.






Replacement

Use the appropriate tools to remove a terminal as shown. While installing a terminal, be sure to insert it until it locks securely.
Insert a thin piece of metal from the terminal side of the connector and with the terminal locking tab pressed down, pull the terminal out from the connector.






Sensors, Switches, and Relays

Handle sensors, switches and relays carefully. Do not drop them or strike them against other objects.






Wiring Harness

Wiring color codes

Two-color wires are indicated by a two-color code symbol.
The first letter indicates the base color of the wire and the second, the color of the stripe.









Fuse

Replacement

When replacing a fuse, be sure to replace it with one of the same capacity. If a fuse fails again, the circuit probably has a short and the wiring should be checked.
Be sure the negative battery terminal is disconnected before replacing a main fuse.
When replacing a pullout fuse, use the fuse puller.






Electric Troubleshooting Tools

Jumper wire

A jumper wire is used to create a temporary circuit. Connect the jumper wire between the terminals of a circuit to bypass a switch.

CAUTION:Do not connect a jumper wire from the power source line to a body ground. This may cause burning or other damage to wiring harnesses or electronic components.






Voltmeter

The DC voltmeter is used to measure circuit voltage. A voltmeter with a range of 15 V or more is used by connecting the positive (+) probe (red lead wire) to the point where voltage will be measured and the negative (-) probe (black lead wire) to a body ground.






Ohmmeter

The ohmmeter is used to measure the resistance between two points in a circuit and to check for continuity and short circuits.

CAUTION:Do not connect the ohmmeter to any circuit where voltage is applied. This will damage the ohmmeter.