DETERMINING SHORT TO GROUND LOCATION (CAN-BUS No.8) [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. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [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 CAN LINE IN BODY CONTROL MODULE (BCM) FOR SHORT TO GROUND •  Switch the main power OFF. •  Disconnect the negative lead-acid battery terminal. (See NEGATIVE LEAD-ACID BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Disconnect the connector 3 which has body control module (BCM) terminals 3V and 3U. •  Inspect for continuity at the following terminals: ―  Between body control module (BCM) terminal 3V (wiring harness side) and body ground ―  Between body control module (BCM) terminal 3U (wiring harness side) and body ground •  Is there continuity?	Yes	Go to the next step.
		No	Replace the body control module (BCM) because there is a short to ground in the body control module (BCM). (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)
2	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-19 AND BODY CONTROL MODULE (BCM) •  Disconnect the connector C-19. •  Connect the connector 3 which has body control module (BCM) terminals 3V and 3U. •  Inspect for continuity at the following terminals: ―  Between body control module (BCM) terminal 3V and body ground ―  Between body control module (BCM) terminal 3U and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between the connector C-19 and body control module (BCM) because the wiring harness is shorted to ground.
		No	Go to the next step.
3	INSPECT CAN LINE IN EMERGENCY CALL UNIT FOR SHORT TO GROUND •  Disconnect the emergency call unit connector. •  Inspect for continuity at the following terminals: ―  Between emergency call unit terminal 1Q (wiring harness side) and body ground ―  Between emergency call unit terminal 1S (wiring harness side) and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between the emergency call unit and connector C-19 because the wiring harness is shorted to ground.
		No	Replace the emergency call unit because there is a short to ground in the emergency call unit. (See EMERGENCY CALL UNIT REMOVAL/INSTALLATION [(E)].)