DETERMINING SHORT BETWEEN CIRCUITS LOCATION (CAN-BUS No.6) [R.H.D.]

id100226004000

Caution

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

System Wiring Diagram

a30zzw00006607

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.

•  Disconnect the negative lead-acid battery terminal before performing any work that requires handling of connectors.

Step	Inspection		Action
1	INSPECT BODY CONTROL MODULE (BCM) FOR SHORT BETWEEN CIRCUITS •  Switch the main power OFF. •  Disconnect the negative lead-acid battery terminal. (See NEGATIVE LEAD-ACID BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Disconnect the connector 2 which has body control module (BCM) terminals 2A and 2C. •  Connect the negative lead-acid battery terminal. (See NEGATIVE LEAD-ACID BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the main power ON (READY off). •  Measure the voltage at body control module (BCM) terminals 2A and 2C (wiring harness side). •  Is the voltage at body control module (BCM) terminals 2A and 2C (wiring harness side) the same?	Yes	Go to the next step.
		No	Replace the body control module (BCM) because there is a short between circuits in the body control module (BCM). (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)
2	INSPECT CAN LINE BETWEEN CONNECTOR C-10 AND BODY CONTROL MODULE (BCM) FOR SHORT BETWEEN CIRCUITS •  Switch the main power OFF. •  Disconnect the negative lead-acid battery terminal. (See NEGATIVE LEAD-ACID BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Disconnect the connector C-10. •  Connect the connector 2 which has body control module (BCM) terminals 2A and 2C. •  Connect the negative lead-acid battery terminal. (See NEGATIVE LEAD-ACID BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the main power ON (READY off). •  Measure the voltage at body control module (BCM) terminals 2A and 2C. •  Is the voltage at body control module (BCM) terminals 2A and 2C the same?	Yes	Repair or replace the wiring harness between the body control module (BCM) and connector C-10 because the wiring harness is shorted between circuits.
		No	Go to the next step.
3	INSPECT CAN LINE BETWEEN FRONT SIDE RADAR SENSOR (LH) AND CONNECTOR C-10 FOR SHORT BETWEEN CIRCUITS •  Switch the main power OFF. •  Disconnect the negative lead-acid battery terminal. (See NEGATIVE LEAD-ACID BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Inspect for continuity between front side radar sensor (LH) terminals C and D. •  Is there continuity?	Yes	Go to the next step.
		No	Go to Step 5.
4	INSPECT FRONT SIDE RADAR SENSOR (LH) FOR SHORT BETWEEN CIRCUITS •  Disconnect the front side radar sensor (LH) connector. •  Inspect for continuity between front side radar sensor (LH) terminals C and D (wiring harness side). •  Is there continuity?	Yes	Repair or replace the wiring harness between the front side radar sensor (LH) and connector C-10 because the wiring harness is shorted between circuits.
		No	Replace the front side radar sensor (LH) because there is a short between circuits in the front side radar sensor (LH). (See FRONT SIDE RADAR SENSOR REMOVAL/INSTALLATION.)
5	INSPECT CAN LINE BETWEEN FRONT RADAR SENSOR AND CONNECTOR C-10 FOR SHORT BETWEEN CIRCUITS •  Inspect for continuity between front radar sensor terminals E and C. •  Is there continuity?	Yes	Go to the next step.
		No	Go to Step 7.
6	INSPECT FRONT RADAR SENSOR FOR SHORT BETWEEN CIRCUITS •  Disconnect the front radar sensor connector. •  Inspect for continuity between front radar sensor terminals E and C (wiring harness side). •  Is there continuity?	Yes	Repair or replace the wiring harness between the front radar sensor and connector C-10 because the wiring harness is shorted between circuits.
		No	Replace the front radar sensor because there is a short between circuits in the front radar sensor. (See FRONT RADAR SENSOR REMOVAL/INSTALLATION.)
7	INSPECT CAN LINE BETWEEN CONNECTOR C-06 AND CONNECTOR C-10 FOR SHORT BETWEEN CIRCUITS •  Disconnect the connector C-06. •  Connect the connector C-10. •  Connect the negative lead-acid battery terminal. (See NEGATIVE LEAD-ACID BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the main power ON (READY off). •  Measure the voltage at body control module (BCM) terminals 2A and 2C. •  Is the voltage at body control module (BCM) terminals 2A and 2C the same?	Yes	Repair or replace the wiring harness between connector C-06 and connector C-10 because the wiring harness is shorted between circuits.
		No	Go to the next step.
8	INSPECT BODY CONTROL MODULE (BCM) FOR SHORT BETWEEN CIRCUITS •  Switch the main power OFF. •  Disconnect the negative lead-acid battery terminal. (See NEGATIVE LEAD-ACID BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Disconnect the connector 4 which has body control module (BCM) terminals 4N and 4M. •  Connect the connector C-06. •  Connect the negative lead-acid battery terminal. (See NEGATIVE LEAD-ACID BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the main power ON (READY off). •  Measure the voltage at body control module (BCM) terminals 2A and 2C. •  Is the voltage at body control module (BCM) terminals 2A and 2C the same?	Yes	Repair or replace the wiring harness between the body control module (BCM) and connector C-06 because the wiring harness is shorted between circuits.
		No	Replace the body control module (BCM) because there is a short between circuits in the body control module (BCM). (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)