DETERMINING SHORT TO GROUND LOCATION (CAN-BUS No.3) [TYPE-B (R.H.D.)]

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Caution

•  Perform the following malfunction diagnosis only when it is diagnosed with a short to ground by CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [TYPE-B (R.H.D.)]. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [TYPE-B (R.H.D.)].)

System Wiring Diagram

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Determination Procedure

Caution

•  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 •  Disconnect the connector 4 which has gateway unit (GWU) terminals 4R and 4Q. •  Inspect for continuity at the following terminals: ―  Between gateway unit (GWU) terminal 4R (wiring harness side) and body ground ―  Between gateway unit (GWU) terminal 4Q (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 FOR SHORT TO GROUND BETWEEN GATEWAY UNIT (GWU) AND CONNECTOR C-17 •  Disconnect the connector C-17. •  Connect the connector 3 which has gateway unit (GWU) terminals 3T and 3S. •  Connect the connector 4 which has gateway unit (GWU) terminals 4R and 4Q. •  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 the gateway unit (GWU) and connector C-17 because the wiring harness is shorted to ground.
		No	Go to the next step.
4	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-17 AND CONNECTOR C-71 •  Disconnect the connector C-71. •  Connect the connector C-17. •  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 connector C-17 and connector C-71 because the wiring harness is shorted to ground.
		No	Go to the next step.
5	INSPECT FOR SHORT TO GROUND BETWEEN AUDIO AMPLIFIER AND CONNECTOR C-71 •  Inspect for continuity at the following terminals: ―  Between audio amplifier terminal 2N and body ground (with Bose® type audio) ―  Between audio amplifier terminal 2M and body ground (with Bose® type audio) ―  Between audio amplifier terminal 1Q and body ground (without Bose® type audio) ―  Between audio amplifier terminal 1S and body ground (without Bose® type audio) •  Is there continuity?	Yes	Go to the next step.
		No	Go to Step 7.
6	INSPECT CAN LINE IN AUDIO AMPLIFIER FOR SHORT TO GROUND •  Disconnect the audio amplifier connector. •  Inspect for continuity at the following terminals: ―  Between audio amplifier terminal 2N (wiring harness side) and body ground (with Bose® type audio) ―  Between audio amplifier terminal 2M (wiring harness side) and body ground (with Bose® type audio) ―  Between audio amplifier terminal 1Q (wiring harness side) and body ground (without Bose® type audio) ―  Between audio amplifier terminal 1S (wiring harness side) and body ground (without Bose® type audio) •  Is there continuity?	Yes	Repair or replace the wiring harness between the audio amplifier and connector C-71 because the wiring harness is shorted to ground.
		No	Replace the audio amplifier because there is a short to ground in the audio amplifier. (See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)
7	INSPECT FOR SHORT TO GROUND BETWEEN 360° VIEW MONITOR CONTROL MODULE AND CONNECTOR C-71 •  Inspect for continuity at the following terminals: ―  Between 360° view monitor control module terminal 1C and body ground ―  Between 360° view monitor control module terminal 1A and body ground •  Is there continuity?	Yes	Go to the next step.
		No	Go to Step 9.
8	INSPECT CAN LINE IN 360° VIEW MONITOR CONTROL MODULE FOR SHORT TO GROUND •  Disconnect the 360° view monitor control module connector. •  Inspect for continuity at the following terminals: ―  Between 360° view monitor control module terminal 1C (wiring harness side) and body ground ―  Between 360° view monitor control module terminal 1A (wiring harness side) and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between the 360° view monitor control module and connector C-71 because the wiring harness is shorted to ground.
		No	Replace the 360° view monitor control module because there is a short to ground in the 360° view monitor control module. (See 360°VIEW MONITOR CONTROL MODULE REMOVAL/INSTALLATION.)
9	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTIVITY MASTER UNIT (CMU) AND CONNECTOR C-13 •  Disconnect the connector C-13. •  Inspect for continuity at the following terminals: ―  Between connectivity master unit (CMU) terminal 1Q and body ground ―  Between connectivity master unit (CMU) terminal 1O and body ground •  Is there continuity?	Yes	Go to the next step.
		No	Repair or replace the wiring harness between connector C-71 and connector C-13 because the wiring harness is shorted to ground.
10	INSPECT CAN LINE IN CONNECTIVITY MASTER UNIT (CMU) FOR SHORT TO GROUND •  Disconnect the connectivity master unit (CMU) connector. •  Inspect for continuity at the following terminals: ―  Between connectivity master unit (CMU) terminal 1Q (wiring harness side) and body ground ―  Between connectivity master unit (CMU) terminal 1O (wiring harness side) and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between the connectivity master unit (CMU) and connector C-13 because the wiring harness is shorted to ground.
		No	Replace the connectivity master unit (CMU) because there is a short to ground in the connectivity master unit (CMU). (See CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION.)