DETERMINING SHORT TO POWER SUPPLY LOCATION (HS-CAN) [MULTIPLEX COMMUNICATION SYSTEM (R.H.D. (EXCEPT MZR-CD 2.2, MZR 2.0 DISI i-stop, MZR 1.5))]

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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 [MULTIPLEX COMMUNICATION SYSTEM (R.H.D. (EXCEPT MZR-CD 2.2, MZR 2.0 DISI i-stop, MZR 1.5))].

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 cable before performing any work that requires handling of connectors.

Step

Inspection

Action
1
INSPECT FOR SHORT TO POWER SUPPLY BETWEEN BCM AND INSTRUMENT CLUSTER
•  Disconnect the negative battery cable.
•  Disconnect the BCM connector 1.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at DLC-2 terminals E and F.
•  Is the voltage between 1.5 - 3.5 V?
Yes
Go to Step 16.
No
Go to the next step.
2
INSPECT BCM FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect the BCM connector 2.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at DLC-2 terminals E and F.
•  Is the voltage between 1.5 - 3.5 V?
Yes
Replace the BCM because there is a short to the power supply in the BCM.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [R.H.D.].)
No
Go to the next step.
3
INSPECT CAN LINE BETWEEN CONNECTOR C-17 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY
•  Disconnect the negative battery cable.
•  Disconnect connector C-17.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at DLC-2 terminals E and F.
•  Is the voltage between 1.5 - 3.5 V?
Yes
Go to the next step.
No
Go to Step 7.
4
INSPECT CAN LINE BETWEEN REAR VEHICLE MONITORING CONTROL MODULE (RH) AND CONNECTOR C-17 FOR SHORT TO POWER SUPPLY
•  Switch the ignition ON.
•  Measure the voltage at rear vehicle monitoring control module (RH) terminals L and I.
•  Is the voltage between 1.5 - 3.5 V?
Yes
Repair or replace the wiring harness between the BCM and connector C-17 because the wiring harness is shorted to the power supply.
No
Go to the next step.
5
INSPECT CAN LINE BETWEEN REAR VEHICLE MONITORING CONTROL MODULE (RH) AND CONNECTOR C-24 FOR SHORT TO POWER SUPPLY
•  Disconnect the negative battery cable.
•  Disconnect connector C-24.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at rear vehicle monitoring control module (RH) terminals L and I.
•  Is the voltage between 1.5 - 3.5 V?
Yes
Repair or replace the wiring harness between connector C-17 and connector C-24 because the wiring harness is shorted to the power supply.
No
Go to the next step.
6
INSPECT REAR VEHICLE MONITORING CONTROL MODULE (RH) FOR SHORT TO POWER SUPPLY
•  Disconnect the negative battery cable.
•  Disconnect the rear vehicle monitoring control module (RH) connector.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at rear vehicle monitoring control module (RH) terminals L and I.
•  Is the voltage between 1.5 - 3.5 V?
Yes
Replace the rear vehicle monitoring control module (RH) because the rear vehicle monitoring control module (RH) is shorted to the power supply.
(See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between the rear vehicle monitoring control module (RH) and connector C-24 because the wiring harness is shorted to the power supply.
7
INSPECT CAN LINE BETWEEN CONNECTOR C-43 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY
•  Disconnect the negative battery cable.
•  Disconnect connector C-43.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at DLC-2 terminals E and F.
•  Is the voltage between 1.5 - 3.5 V?
Yes
Go to the next step.
No
Go to Step 11.
8
INSPECT CAN LINE BETWEEN CONNECTOR C-43 AND AFS CONTROL MODULE FOR SHORT TO POWER SUPPLY
•  Switch the ignition ON.
•  Measure the voltage at AFS control module terminals B and A.
•  Is the voltage between 1.5 - 3.5 V?
Yes
Go to Step 10.
No
Go to the next step.
9
INSPECT AFS CONTROL MODULE FOR SHORT TO POWER SUPPLY
•  Disconnect the negative battery cable.
•  Disconnect the AFS control module connector.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at AFS control module terminals B and A (wiring harness side).
•  Is the voltage between 1.5 - 3.5 V?
Yes
Replace the AFS control module because there is a short to the power supply in the AFS control module.
(See AFS (ADAPTIVE FRONT LIGHTING SYSTEM) CONTROL MODULE REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between connector C-43 and the AFS control module because the wiring harness is shorted to the power supply.
10
INSPECT SAS CONTROL MODULE FOR SHORT TO POWER SUPPLY
•  Disconnect the negative battery cable.
•  Connect connector C-43.
•  Disconnect the SAS control module.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at DLC-2 terminals E and F.
•  Is the voltage between 1.5 - 3.5 V?
Yes
Replace the SAS control module because there is a short to the power supply in the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between the SAS control module and connector C-17/C-43 because the wiring harness is shorted to the power supply.
11
INSPECT CAN LINE BETWEEN CONNECTOR C-47 AND DLC-2 FOR SHORT TO POWER SUPPLY
•  Disconnect the negative battery cable.
•  Disconnect connector C-47.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at DLC-2 terminals E and F.
•  Is the voltage between 1.5 - 3.5 V?
Yes
Go to the next step.
No
Repair or replace the wiring harness between the DLC-2 and connector C-47 because the wiring harness is shorted to the power supply.
12
INSPECT CAN LINE BETWEEN CONNECTOR C-47 AND KEYLESS CONTROL MODULE FOR SHORT TO POWER SUPPLY
•  Switch the ignition ON.
•  Measure the voltage at keyless control module terminals 2K and 2L.
•  Is the voltage between 1.5 - 3.5 V?
Yes
Go to Step 14.
No
Go to the next step.
13
INSPECT KEYLESS CONTROL MODULE FOR SHORT TO POWER SUPPLY
•  Disconnect the negative battery cable.
•  Disconnect the keyless control module connector.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at keyless control module terminals 2K and 2L (wiring harness side).
•  Is the voltage between 1.5 - 3.5 V?
Yes
Replace the keyless control module because there is a short to the power supply in the keyless control module.
(See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between connector C-47 and the keyless control module because the wiring harness is shorted to the power supply.
14
INSPECT CAN LINE BETWEEN CONNECTOR C-43 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY
•  Switch the ignition ON.
•  Measure the voltage at instrument cluster terminals 2B and 2D.
•  Is the voltage between 1.5 - 3.5 V?
Yes
Repair or replace the wiring harness between connector C-43 and connector C-47 because the wiring harness is shorted to the power supply.
No
Go to the next step.
15
INSPECT INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY
•  Disconnect the negative battery cable.
•  Disconnect the instrument cluster connector.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at instrument cluster terminals 2B and 2D (wiring harness side).
•  Is the voltage between 1.5 - 3.5 V?
Yes
Replace the instrument cluster because the instrument cluster is shorted to the power supply.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between connector C-47 and the instrument cluster because the wiring harness is shorted to the power supply.
16
INSPECT CAN LINE BETWEEN CONNECTOR C-41 AND BCM FOR SHORT TO POWER SUPPLY
•  Disconnect the negative battery cable.
•  Connect the BCM connector 1.
•  Disconnect connector C-41.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at DLC-2 terminals E and F.
•  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-41 and the BCM because the wiring harness is shorted to the power supply.
17
INSPECT CAN LINE BETWEEN DSC HU/CM OR ABS HU/CM AND CONNECTOR C-41 FOR SHORT TO POWER SUPPLY
•  Switch the ignition ON.
•  Measure the following voltages:
―  DSC HU/CM terminals M and J (with DSC)
―  ABS HU/CM terminals H and L (with ABS)
•  Is the voltage between 1.5 - 3.5 V?
Yes
Go to Step 19.
No
Go to the next step.
18
INSPECT DSC HU/CM OR ABS HU/CM FOR SHORT TO POWER SUPPLY
•  Disconnect the negative battery cable.
•  Disconnect the DSC HU/CM or ABS HU/CM connector.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the following voltages:
―  DSC HU/CM terminals M and J (wiring harness side) (with DSC)
―  ABS HU/CM terminals H and L (wiring harness side) (with ABS)
•  Is the voltage between 1.5 - 3.5 V?
Yes
Replace the DSC HU/CM or ABS HU/CM because the DSC HU/CM or ABS HU/CM is shorted to the power supply.
(See DSC HU/CM REMOVAL/INSTALLATION.)
(See ABS HU/CM REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between the DSC HU/CM or ABS HU/CM and connector C-41 because the wiring harness is shorted to the power supply.
19
INSPECT CAN LINE BETWEEN CONNECTOR C-02 AND BCM FOR SHORT TO POWER SUPPLY
•  Disconnect the negative battery cable.
•  Connect connector C-41.
•  Disconnect connector C-02.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at DLC-2 terminals E and F.
•  Is the voltage between 1.5 - 3.5 V?
Yes
•  For the MZR 2.0, MZR 2.5, MZR 2.3 DISI Turbo, MZR 1.6, or MZ-CD 1.6, go to Step 21.
•  For SKYACTIV-G 2.0, go to Step 22.
No
Go to the next step.
20
INSPECT EHPAS CONTROL MODULE FOR SHORT TO POWER SUPPLY
•  Disconnect the negative battery cable.
•  Disconnect the EHPAS control module connector.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at EHPAS control module terminals 2D and 2B (wiring harness side).
•  Is the voltage between 1.5 - 3.5 V?
Yes
Replace the EHPAS control module because the EHPAS control module is shorted to the power supply.
(See ELECTRIC POWER STEERING OIL PUMP COMPONENT DISASSEMBLY/ASSEMBLY.)
No
Repair or replace the wiring harness between the EHPAS control module and connector C-02/C-41 because the wiring harness is shorted to the power supply.
21
INSPECT CAN-RELATED MODULES FOR SHORT TO POWER SUPPLY
•  Disconnect the negative battery cable.
Note
•  Disconnect the negative battery cable before disconnecting the connectors, and connect the negative battery cable before measuring the terminal voltage.
•  Connect connector C-02.
•  Measure the voltage at the following terminals while removing the PCM and TCM one by one.
•  Switch the ignition ON.
―  DLC-2 terminal F
―  DLC-2 terminal E
•  Is the voltage between 1.5 - 3.5 V?
Yes
Replace the module in which the voltage is between 1.5-3.5 when the module is removed.
No
Repair or replace the wiring harness between the PCM and TCM/connector C-02 because the wiring harness is shorted to the power supply.
22
INSPECT CAN LINE BETWEEN TCM AND CONNECTOR C-02 FOR SHORT TO POWER SUPPLY
•  Switch the ignition ON.
•  Measure the following voltages:
―  TCM terminals 1E and 1F (SKYACTIV-G 2.0)
•  Is the voltage between 1.5 - 3.5 V?
Yes
Go to Step 24.
No
Go to the next step.
23
INSPECT TCM FOR SHORT TO POWER SUPPLY
•  Disconnect the negative battery cable.
•  Connect connector C-02.
•  Disconnect the TCM connector.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the following voltages:
―  TCM terminals 1E and 1F (wiring harness side) (SKYACTIV-G 2.0)
•  Is the voltage between 1.5 - 3.5 V?
Yes
Replace the TCM because there is a short to the power supply in the TCM.
(See TCM REMOVAL/INSTALLATION [FS5A-EL].)
(See CONTROL VALVE BODY REMOVAL/INSTALLATION [FW6A-EL].)
No
Repair or replace the wiring harness between the TCM and connector C-02 because the wiring harness is shorted to the power supply.
24
INSPECT PCM FOR SHORT TO POWER SUPPLY
•  Disconnect the negative battery cable.
•  Connect connector C-02.
•  Disconnect the PCM connector.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the following voltages:
―  PCM terminals 2AK and 2AL (wiring harness side) (SKYACTIV-G 2.0)
•  Is the voltage between 1.5 - 3.5 V?
Yes
Replace the PCM because there is a short to the power supply in the PCM.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)
No
Repair or replace the wiring harness between the PCM and connector C-02 because the wiring harness is shorted to the power supply.