DETERMINING SHORT TO POWER SUPPLY LOCATION (CAN-BUS No.5) [L.H.D. (E)]


id100225003576

Caution
•  Perform the following malfunction diagnosis only when it is diagnosed with a short to power supply by CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW.(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [L.H.D. (E)].)

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

Step

Inspection

Action

1
INSPECT CAN LINE BETWEEN BODY CONTROL MODULE (BCM) AND CONNECTOR C-06 FOR SHORT TO POWER SUPPLY
•  Switch the main power OFF.
•  Disconnect the negative lead-acid battery terminal.
•  Disconnect the connector C-06.
•  Connect the negative lead-acid battery terminal.
•  Switch the main power ON (READY off).
•  Measure the voltage at body control module (BCM) terminals 2E and 2G.
•  Is the voltage between 1.5—3.5 V?
Yes
•  Go to Step 3. (With parking assist unit (optical) / 360° view monitor control module)
•  Go to Step 7. (Without parking assist unit (optical) / 360° view monitor control module)
No
Go to the next step.
2
INSPECT BODY CONTROL MODULE (BCM) FOR SHORT TO POWER SUPPLY
•  Switch the main power OFF.
•  Disconnect the negative lead-acid battery terminal.
•  Disconnect the connector 2 which has body control module (BCM) terminals 2E and 2G.
•  Connect the connector C-06.
•  Connect the negative lead-acid battery terminal.
•  Switch the main power ON (READY off).
•  Measure the voltage at body control module (BCM) terminals 2E and 2G (wiring harness side).
•  Is the voltage between 1.5—3.5 V?
Yes
Replace the body control module (BCM) because there is a short to the power supply in the body control module (BCM).
No
Repair or replace the wiring harness between the body control module (BCM) and connector C-06 because the wiring harness is shorted to the power supply.
3
INSPECT CAN LINE BETWEEN CONNECTOR C-40 AND CONNECTOR C-06 FOR SHORT TO POWER SUPPLY
•  Switch the main power OFF.
•  Disconnect the negative lead-acid battery terminal.
•  Disconnect the connector C-40.
•  Connect the connector C-06.
•  Connect the negative lead-acid battery terminal.
•  Switch the main power ON (READY off).
•  Measure the voltage at body control module (BCM) terminals 2E and 2G.
•  Is the voltage between 1.5—3.5 V?
Yes
Go to the next step.
No
Repair or replace the wiring harness between the connector C-40 and connector C-06 because the wiring harness is shorted to the power supply.
4
INSPECT CAN LINE BETWEEN PARKING ASSIST UNIT (OPTICAL) / 360° VIEW MONITOR CONTROL MODULE AND CONNECTOR C-40 FOR SHORT TO POWER SUPPLY
•  Measure the voltage at parking assist unit (optical) / 360° view monitor control module terminals 1C and 1A.
•  Is the voltage between 1.5—3.5 V?
Yes
Go to Step 6.
No
Go to the next step.
5
INSPECT PARKING ASSIST UNIT (OPTICAL) / 360° VIEW MONITOR CONTROL MODULE FOR SHORT TO POWER SUPPLY
•  Switch the main power OFF.
•  Disconnect the negative lead-acid battery terminal.
•  Disconnect the parking assist unit (optical) / 360° view monitor control module connector.
•  Connect the connector C-40.
•  Connect the negative lead-acid battery terminal.
•  Switch the main power ON (READY off).
•  Measure the voltage at body control module (BCM) terminals 2E and 2G.
•  Is the voltage between 1.5—3.5 V?
Yes
Replace the parking assist unit (optical) / 360° view monitor control module because there is a short to the power supply in the parking assist unit (optical) / 360° view monitor control module.
No
Repair or replace the wiring harness between the parking assist unit (optical) / 360° view monitor control module and connector C-40 because the wiring harness is shorted to the power supply.
6
INSPECT CAN LINE BETWEEN CONNECTOR C-40 AND CONNECTOR C-13 FOR SHORT TO POWER SUPPLY
•  Switch the main power OFF.
•  Disconnect the negative lead-acid battery terminal.
•  Disconnect the connector C-13.
•  Connect the connector C-40.
•  Connect the negative lead-acid battery terminal.
•  Switch the main power ON (READY off).
•  Measure the voltage at body control module (BCM) terminals 2E and 2G.
•  Is the voltage between 1.5—3.5 V?
Yes
•  Go to Step 8. (With driver monitoring camera unit)
•  Go to Step 12. (Without driver monitoring camera unit)
No
Repair or replace the wiring harness between the connector C-13 and connector C-40 because the wiring harness is shorted to the power supply.
7
INSPECT CAN LINE BETWEEN CONNECTOR C-06 AND CONNECTOR C-13 FOR SHORT TO POWER SUPPLY
•  Switch the main power OFF.
•  Disconnect the negative lead-acid battery terminal.
•  Disconnect the connector C-13.
•  Connect the connector C-06.
•  Connect the negative lead-acid battery terminal.
•  Switch the main power ON (READY off).
•  Measure the voltage at body control module (BCM) terminals 2E and 2G.
•  Is the voltage between 1.5—3.5 V?
Yes
•  Go to the next step. (With driver monitoring camera unit)
•  Go to Step 11. (Without driver monitoring camera unit)
No
Repair or replace the wiring harness between the connector C-13 and connector C-06 because the wiring harness is shorted to the power supply.
8
INSPECT CAN LINE BETWEEN CONNECTOR C-38 AND CONNECTOR C-13 FOR SHORT TO POWER SUPPLY
•  Switch the main power OFF.
•  Disconnect the negative lead-acid battery terminal.
•  Disconnect the connector C-38.
•  Connect the connector C-13.
•  Connect the negative lead-acid battery terminal.
•  Switch the main power ON (READY off).
•  Measure the voltage at body control module (BCM) terminals 2E and 2G.
•  Is the voltage between 1.5—3.5 V?
Yes
Go to the next step.
No
Repair or replace the wiring harness between the connector C-38 and connector C-13 because the wiring harness is shorted to the power supply.
9
INSPECT CAN LINE BETWEEN DRIVER MONITORING CAMERA UNIT AND CONNECTOR C-38 FOR SHORT TO POWER SUPPLY
•  Measure the voltage at driver monitoring camera unit terminals 1F and 1E.
•  Is the voltage between 1.5—3.5 V?
Yes
Go to Step 11.
No
Go to the next step.
10
INSPECT DRIVER MONITORING CAMERA UNIT FOR SHORT TO POWER SUPPLY
•  Switch the main power OFF.
•  Disconnect the negative lead-acid battery terminal.
•  Disconnect the driver monitoring camera unit connector.
•  Connect the connector C-38.
•  Connect the negative lead-acid battery terminal.
•  Switch the main power ON (READY off).
•  Measure the voltage at body control module (BCM) terminals 2E and 2G.
•  Is the voltage between 1.5—3.5 V?
Yes
Replace the driver monitoring camera unit because there is a short to the power supply in the driver monitoring camera unit.
No
Repair or replace the wiring harness between the driver monitoring camera unit and connector C-38 because the wiring harness is shorted to the power supply.
11
INSPECT CAN LINE BETWEEN CONNECTOR C-16 AND CONNECTOR C-38 FOR SHORT TO POWER SUPPLY
•  Switch the main power OFF.
•  Disconnect the negative lead-acid battery terminal.
•  Disconnect the connector C-16.
•  Connect the connector C-38.
•  Connect the negative lead-acid battery terminal.
•  Switch the main power ON (READY off).
•  Measure the voltage at body control module (BCM) terminals 2E and 2G.
•  Is the voltage between 1.5—3.5 V?
Yes
Go to the next step.
No
Repair or replace the wiring harness between the connector C-16 and connector C-38 because the wiring harness is shorted to the power supply.
12
INSPECT CAN LINE BETWEEN CONNECTOR C-27 AND CONNECTOR C-16 FOR SHORT TO POWER SUPPLY
•  Switch the main power OFF.
•  Disconnect the negative lead-acid battery terminal.
•  Disconnect the connector C-27.
•  Connect the connector C-16.
•  Connect the negative lead-acid battery terminal.
•  Switch the main power ON (READY off).
•  Measure the voltage at body control module (BCM) terminals 2E and 2G.
•  Is the voltage between 1.5—3.5 V?
Yes
Go to the next step.
No
Repair or replace the wiring harness between the connector C-27 and connector C-16 because the wiring harness is shorted to the power supply.
13
INSPECT DRIVER FORWARD SENSING CAMERA (FSC) FOR SHORT TO POWER SUPPLY
•  Switch the main power OFF.
•  Disconnect the negative lead-acid battery terminal.
•  Disconnect the forward sensing camera (FSC) connector.
•  Connect the connector C-27.
•  Connect the negative lead-acid battery terminal.
•  Switch the main power ON (READY off).
•  Measure the voltage at body control module (BCM) terminals 2E and 2G.
•  Is the voltage between 1.5—3.5 V?
Yes
Replace the forward sensing camera (FSC) because there is a short to the power supply in the forward sensing camera (FSC).
No
Repair or replace the wiring harness between the forward sensing camera (FSC) and connector C-27 because the wiring harness is shorted to the power supply.