DETERMINING SHORT TO GROUND LOCATION (CAN-BUS No.4) [TYPE-B (R.H.D.)]

• When disconnecting the connector, verify that there is no looseness, damage, deformation, corrosion, or poor connection of the connector terminals.

• When inspecting the connector, touch it with a paper clip or similar thin pin without directly inserting a tester probe into the terminal.

Step	Inspection	Action
1	INSPECT FOR SHORT TO GROUND BETWEEN GATEWAY UNIT (GWU) AND DLC-2 • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Disconnect the connector 3 which has gateway unit (GWU) terminals 3T and 3S. • Inspect for continuity at the following terminals: ― Between DLC-2 terminal F and body ground ― Between DLC-2 terminal E and body ground • Is there continuity?	Yes	Repair or replace the wiring harness between gateway unit (GWU) and DLC-2 because the wiring harness is shorted to ground.
No	Go to the next step.
2	INSPECT CAN LINE IN GATEWAY UNIT (GWU) FOR SHORT TO GROUND • Inspect for continuity at the following terminals: ― Between gateway unit (GWU) terminal 3V (wiring harness side) and body ground ― Between gateway unit (GWU) terminal 3U (wiring harness side) and body ground • Is there continuity?	Yes	Go to the next step.
No	Replace the gateway unit (GWU) because there is a short to ground in the gateway unit (GWU). (See GATEWAY UNIT (GWU) REMOVAL/INSTALLATION [TYPE-B].)
3	INSPECT CAN LINE IN TELEMATICS COMMUNICATION UNIT FOR SHORT TO GROUND • Disconnect the telematics communication unit connector. • Inspect for continuity at the following terminals: ― Between telematics communication unit terminal 1Q (wiring harness side) and body ground ― Between telematics communication unit terminal 1S (wiring harness side) and body ground • Is there continuity?	Yes	Repair or replace the wiring harness between the gateway unit (GWU) and telematics communication unit because the wiring harness is shorted to ground.
No	Replace the telematics communication unit because there is a short to ground in the telematics communication unit. (See TELEMATICS COMMUNICATION UNIT REMOVAL/INSTALLATION [TYPE-B].)

Step

Inspection

Action

INSPECT FOR SHORT TO GROUND BETWEEN GATEWAY UNIT (GWU) AND DLC-2

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

• Disconnect the connector 3 which has gateway unit (GWU) terminals 3T and 3S.

• Inspect for continuity at the following terminals:

― Between DLC-2 terminal F and body ground

― Between DLC-2 terminal E and body ground

• Is there continuity?

Yes

Repair or replace the wiring harness between gateway unit (GWU) and DLC-2 because the wiring harness is shorted to ground.

Go to the next step.

INSPECT CAN LINE IN GATEWAY UNIT (GWU) FOR SHORT TO GROUND

• Inspect for continuity at the following terminals:

― Between gateway unit (GWU) terminal 3V (wiring harness side) and body ground

― Between gateway unit (GWU) terminal 3U (wiring harness side) and body ground

• Is there continuity?

Yes

Go to the next step.

Replace the gateway unit (GWU) because there is a short to ground in the gateway unit (GWU).

(See GATEWAY UNIT (GWU) REMOVAL/INSTALLATION [TYPE-B].)

INSPECT CAN LINE IN TELEMATICS COMMUNICATION UNIT FOR SHORT TO GROUND

• Disconnect the telematics communication unit connector.

• Inspect for continuity at the following terminals:

― Between telematics communication unit terminal 1Q (wiring harness side) and body ground

― Between telematics communication unit terminal 1S (wiring harness side) and body ground

• Is there continuity?

Yes

Repair or replace the wiring harness between the gateway unit (GWU) and telematics communication unit because the wiring harness is shorted to ground.

Replace the telematics communication unit because there is a short to ground in the telematics communication unit.

(See TELEMATICS COMMUNICATION UNIT REMOVAL/INSTALLATION [TYPE-B].)