DETERMINING SHORT BETWEEN CIRCUITS LOCATION (MS-CAN) [L.H.D.]

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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 [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 BETWEEN CONNECTOR C-46 AND DLC-2 FOR SHORT BETWEEN CIRCUITS
•  Disconnect the negative battery terminal.
•  Disconnect connector C-46.
•  Inspect for continuity between DLC-2 terminals L and K.
•  Is there continuity?
Yes
Repair or replace the wiring harness between connector C-46 and DLC-2 because the wiring harness is shorted between circuits.
No
Go to the next step.
2
INSPECT BETWEEN CONNECTOR C-46 AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off).
•  Measure the voltage at instrument cluster terminals 1C and 1E.
•  Is the voltage at instrument cluster terminals 1C and 1E the same?
Yes
Go to the next step.
No
Go to Step 4.
3
INSPECT INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the instrument cluster connector.
•  Inspect for continuity between instrument cluster terminals 1C and 1E (wiring harness side).
•  Is there continuity?
Yes
Repair or replace the wiring harness between the instrument cluster and connector C-46 because the wiring harness is shorted between circuits.
No
Replace the instrument cluster because there is a short between circuits in the instrument cluster.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
4
INSPECT BETWEEN CONNECTOR C-46 AND FRONT CLIMATE CONTROL UNIT FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Inspect for continuity between front climate control unit terminals 1A(except 2019CY) / 1K(2019CY) and 1C(except 2019CY) / 1M(2019CY).
•  Is there continuity?
Yes
Go to the next step.
No
Go to Step 6.
5
INSPECT FRONT CLIMATE CONTROL UNIT FOR SHORT BETWEEN CIRCUITS
•  Disconnect the front climate control unit connector.
•  Inspect for continuity between front climate control unit terminals 1A(except 2019CY) / 1K(2019CY) and 1C(except 2019CY) / 1M(2019CY) (wiring harness side).
•  Is there continuity?
Yes
Repair or replace the wiring harness between the front climate control unit and connector C-46 because the wiring harness is shorted between circuits.
No
Replace the front climate control unit because there is a short between circuits inside the front climate control unit.
(See FRONT CLIMATE CONTROL UNIT REMOVAL/INSTALLATION.)
6
INSPECT BETWEEN CONNECTOR C-46 AND PARKING ASSIST UNIT FOR SHORT BETWEEN CIRCUITS
•  Inspect for continuity between parking assist unit terminals AA and AB.
•  Is there continuity?
Yes
Go to the next step.
No
Go to Step 8.
7
INSPECT PARKING ASSIST UNIT FOR SHORT BETWEEN CIRCUITS
•  Disconnect the parking assist unit connector.
•  Inspect for continuity between parking assist unit terminals AA and AB (wiring harness side).
•  Is there continuity?
Yes
Repair or replace the wiring harness between the parking assist unit and connector C-46 because the wiring harness is shorted between circuits.
No
Replace the parking assist unit because there is a short between circuits inside the parking assist unit.
(See PARKING ASSIST UNIT REMOVAL/INSTALLATION.)
8
INSPECT BETWEEN CONNECTOR C-46 AND CONNECTOR C-13 FOR SHORT BETWEEN CIRCUITS
•  Disconnect connector C-13.
•  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 at DLC-2 terminals L and K the same?
Yes
Repair or replace the wiring harness between connector C-46 and connector C-13 because the wiring harness is shorted between circuits.
No
Go to the next step.
9
INSPECT BETWEEN CONNECTOR C-13 AND REAR BODY CONTROL MODULE (RBCM) FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the rear body control module (RBCM) connector.
•  Connect 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 at DLC-2 terminals L and K the same?
Yes
Go to the next step.
No
Go to Step 12.
10
INSPECT BETWEEN CONNECTOR C-20 AND REAR MOUNT CAMERA FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect connector C-20.
•  Inspect for continuity between rear mount camera terminals G and H.
•  Is there continuity?
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 between circuits.
11
INSPECT REAR MOUNT CAMERA FOR SHORT BETWEEN CIRCUITS
•  Disconnect the rear mount camera connector.
•  Inspect for continuity between rear mount camera terminals G and H (wiring harness side).
•  Is there continuity?
Yes
Repair or replace the wiring harness between the rear mount camera and connector C-20 because the wiring harness is shorted between circuits.
No
Replace the rear mount camera because there is a short between circuits inside the rear mount camera.
(See REAR MOUNT CAMERA REMOVAL/INSTALLATION.)
12
INSPECT BETWEEN BLIND SPOT MONITORING (BSM) CONTROL MODULE (LH) AND REAR BODY CONTROL MODULE (RBCM) FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Inspect the continuity between blind spot monitoring (BSM) control module (LH) terminals C and D.
•  Is there continuity?
Yes
Go to the next step.
No
Replace the rear body control module (RBCM) because there is a short between circuits in the rear body control module (RBCM).
(See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION.)
13
INSPECT BETWEEN BLIND SPOT MONITORING (BSM) CONTROL MODULE (LH) AND CONNECTOR C-24 FOR SHORT BETWEEN CIRCUITS
•  Disconnect connector C-24.
•  Inspect the continuity between blind spot monitoring (BSM) control module (LH) terminals C and D.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness between the rear body control module (RBCM) and connector C-24 because the wiring harness is shorted between circuits.
14
INSPECT BLIND SPOT MONITORING (BSM) CONTROL MODULE (LH) FOR SHORT BETWEEN CIRCUITS
•  Disconnect the blind spot monitoring (BSM) control module (LH) connector.
•  Inspect for continuity between blind spot monitoring (BSM) control module (LH) terminals C and D (wiring harness side).
•  Is there continuity?
Yes
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 between circuits.
No
Replace the blind spot monitoring (BSM) control module (LH) because there is a short between circuits in the blind spot monitoring (BSM) control module (LH).
(See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)