DETERMINING SHORT TO POWER SUPPLY LOCATION (MS-CAN) [L.H.D.]

id100225001000

Caution
•  Perform the following malfunction diagnosis only when it is diagnosed with a short to the power supply by CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [L.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 DLC-2, touch it with a paper clip or similar thin pin without directly inserting a tester into the terminals.
•  Disconnect the negative battery terminal before performing any work that requires handling of connectors.

Step

Inspection

Action
1
INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-46 AND DLC-2
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect connector C-46.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals L and K.
•  Is the voltage 0 V?
Yes
Go to the next step.
No
Repair or replace the wiring harness between the DLC-2 and connector C-46 because the wiring harness is shorted to the power supply.
2
INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-46 AND FRONT CLIMATE CONTROL UNIT
•  Measure the voltage at front climate control unit terminals 1A(except 2019CY) / 1K(2019CY) and 1C(except 2019CY) / 1M(2019CY).
•  Is the voltage between 1.5 — 3.5 V?
Yes
Go to Step 4.
No
Go to the next step.
3
INSPECT FRONT CLIMATE CONTROL UNIT FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the front climate control unit connector.
•  Connect connector C-46.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals L and K.
•  Is the voltage between 1.5 — 3.5 V?
  
Replace the front climate control unit because there is a short to the power supply in the front climate control unit.
(See FRONT CLIMATE CONTROL UNIT REMOVAL/INSTALLATION.)
 
Repair or replace the wiring harness between the front climate control unit and connector C-46 because the wiring harness is shorted to the power supply.
4
INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-46 AND PARKING ASSIST UNIT
•  Measure the voltage at parking assist unit terminals AA and AB.
•  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 FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the parking assist unit connector.
•  Connect connector C-46.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals L and K.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Replace the parking assist unit because there is a short to the power supply in the parking assist unit.
(See PARKING ASSIST UNIT REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between the parking assist unit and connector C-46 because the wiring harness is shorted to the power supply.
6
INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-46 AND REAR BODY CONTROL MODULE (RBCM)
•  Measure the voltage at rear body control module (RBCM) terminals 3E and 3G.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Go to the next step.
No
Go to Step 8.
7
INSPECT INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the instrument cluster connector.
•  Connect connector C-46.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals L and K.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Replace the instrument cluster because there is a short to the power supply in the instrument cluster.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between the instrument cluster and connector C-46 because the wiring harness is shorted to the power supply.
8
INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-46 AND CONNECTOR C-13
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Connect connector C-46.
•  Disconnect the connector C-13.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals L and K.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Go to the next step.
No
Repair or replace the wiring harness between connector C-46 and connector C-13 because the wiring harness is shorted to the power supply.
9
INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-13 AND REAR BODY CONTROL MODULE (RBCM)
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Connect connector C-13.
•  Disconnect the rear body control module (RBCM) connector.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals L and K.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Go to Step 12.
No
Go to the next step.
10
INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-20 AND REAR MOUNT CAMERA
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the connector C-20.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals L and K.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Go to the next step.
No
Repair or replace the wiring harness between the rear body control module (RBCM) and connector C-13 and connector C-20 because the wiring harness is shorted to the power supply.
11
INSPECT REAR MOUNT CAMERA FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the rear mount camera connector.
•  Connect connector C-20.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals L and K.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Replace the rear mount camera because there is a short to the power supply in the rear mount camera.
(See REAR MOUNT CAMERA REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between the rear mount camera and connector C-20 because the wiring harness is shorted to the power supply.
12
INSPECT FOR SHORT TO POWER SUPPLY BETWEEN BLIND SPOT MONITORING (BSM) CONTROL MODULE (LH) AND REAR BODY CONTROL MODULE (RBCM)
•  Measure the voltage at blind spot monitoring (BSM) control module (LH) terminals C and D.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Replace the rear body control module (RBCM) because there is a short to the power supply in the rear body control module (RBCM).
(See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION.)
No
Go to the next step.
13
INSPECT FOR SHORT TO POWER SUPPLY BETWEEN BLIND SPOT MONITORING (BSM) CONTROL MODULE (LH) AND CONNECTOR C-24
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect connector C-24.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off).
•  Measure the voltage at blind spot monitoring (BSM) control module (LH) terminals C and D.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Repair or replace the wiring harness between the rear body control module (RBCM) and connector C-24 because the wiring harness is shorted to the power supply.
No
Go to the next step.
14
INSPECT BLIND SPOT MONITORING (BSM) CONTROL MODULE (LH) FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the blind spot monitoring (BSM) control module (LH) connector.
•  Connect connector C-24.
•  Connect the rear body control module (RBCM) connector.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals L and K.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Replace the blind spot monitoring (BSM) control module (LH) because there is a short to power supply in the blind spot monitoring (BSM) control module (LH)
(See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between the blind spot monitoring (BSM) control module (LH) and connector C-24 because the wiring harness is shorted to the power supply.