DETERMINING SHORT BETWEEN CIRCUITS 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 between circuits 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.

Step

Inspection

Action
1
INSPECT CAN LINE BETWEEN BCM AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUIT
•  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 at DLC-2 terminals E and F the same?
Yes
Go to the next step.
No
Go to Step 16.
2
INSPECT CAN LINE IN BCM FOR SHORT BETWEEN CIRCUITS
•  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 at DLC-2 terminals E and F the same?
Yes
Go to the next step.
No
Replace the BCM because there is a short between circuits in the BCM.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [R.H.D.].)
3
INSPECT CAN LINE BETWEEN CONNECTOR C-17 AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUIT
•  Switch the ignition off.
•  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 at DLC-2 terminals E and F the same?
Yes
Go to Step 7.
No
Go to the next step.
4
INSPECT CAN LINE BETWEEN REAR VEHICLE MONITORING CONTROL MODULE (RH) AND CONNECTOR C-17 FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition ON.
•  Measure the voltage at rear vehicle monitoring control module (RH) terminals L and I.
•  Is the voltage at rear vehicle monitoring control module (RH) terminals L and I the same?
Yes
Go to the next step.
No
Repair or replace the wiring harness between the BCM and connector C-17 because the wiring harness is shorted between circuits.
5
INSPECT CAN LINE BETWEEN CONNECTOR C-24 AND REAR VEHICLE MONITORING CONTROL MODULE (RH) FOR SHORT BETWEEN CIRCUIT
•  Switch the ignition off.
•  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 at rear vehicle monitoring control module (RH) terminals L and I the same?
Yes
Go to the next step.
No
Repair or replace the wiring harness between connector C-24 and connector C-17 because the wiring harness is shorted between circuits.
6
INSPECT CAN LINE IN REAR VEHICLE MONITORING CONTROL MODULE (RH) FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Connect connector C-24 and connector C-17.
•  Disconnect the rear vehicle monitoring control module (RH) connector.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at DLC-2 terminals E and F.
•  Is the voltage at DLC-2 terminals E and F the same?
Yes
Repair or replace the wiring harness between the rear vehicle monitoring control module (RH) and connector C-24 because the wiring harness is shorted between circuits.
No
Replace the rear vehicle monitoring control module (RH) because there is a short between circuits in the rear vehicle monitoring control module (RH).
(See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
7
INSPECT CAN LINE BETWEEN CONNECTOR C-43 AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUIT
•  Switch the ignition off.
•  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 at DLC-2 terminals E and F the same?
Yes
Go to Step 11.
No
Go to the next step.
8
INSPECT CAN LINE BETWEEN CONNECTOR C-43 AND AFS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition ON.
•  Measure the voltage at AFS control module connector terminals B and A.
•  Is the voltage at AFS control module connector terminals B and A the same?
Yes
Go to the next step.
No
Go to Step 10
9
INSPECT CAN LINE IN AFS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Connect connector C-43.
•  Disconnect the AFS control module connector.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at DLC-2 terminals E and F.
•  Is the voltage at DLC-2 terminals E and F the same?
Yes
Repair or replace the wiring harness between the AFS control module and connector C-43 because the wiring harness is shorted between circuits.
No
Replace the AFS control module because there is a short between circuits in the AFS control module.
(See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION.)
10
INSPECT CAN LINE IN SAS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  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 at DLC-2 terminals E and F the same?
Yes
Repair or replace the wiring harness between the SAS control module and connector C-17/C-43 because the wiring harness is shorted between circuits.
No
Replace the SAS control module because there is a short between circuits in the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
11
INSPECT CAN LINE BETWEEN DLC-2 AND CONNECTOR C-47 FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect connector C-47.
•  Verify the continuity between DLC-2 terminals E and F.
•  Is there continuity?
Yes
Repair or replace the wiring harness between DLC-2 and connector C-42 because the wiring harness is shorted between circuits.
No
Go to the next step.
12
INSPECT CAN LINE BETWEEN KEYLESS CONTROL MUDDLE AND CONNECTOR C-47 FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition ON.
•  Measure the voltage at keyless control module terminals 2K and 2L.
•  Is the voltage at keyless control module terminals 2K and 2L the same?
Yes
Go to the next step.
No
Go to Step 14.
13
INSPECT CAN LINE IN KEYLESS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Connect connector C-47.
•  Disconnect the keyless control module.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at DLC-2 terminals E and F.
•  Is the voltage at DLC-2 terminals E and F the same?
Yes
Repair or replace the wiring harness between the keyless control module and connector C-47 because the wiring harness is shorted between circuits.
No
Replace the keyless control module because there is a short between circuits in the keyless control module.
(See AFS (ADAPTIVE FRONT LIGHTING SYSTEM) CONTROL MODULE REMOVAL/INSTALLATION.)
14
INSPECT CAN LINE BETWEEN CONNECTOR C-47 AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUIT
•  Switch the ignition ON.
•  Measure the voltage at instrument cluster terminals 2B and 2D.
•  Is the voltage at instrument cluster terminals 2B and 2D the same?
Yes
Go to the next step.
No
Repair or replace the wiring harness between connector C-43 and connector C-47 because the wiring harness is shorted between circuits.
15
INSPECT CAN LINE IN INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Connect connector C-47.
•  Disconnect the instrument cluster connector.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at DLC-2 terminals E and F.
•  Is the voltage at DLC-2 terminals E and F the same?
Yes
Repair or replace the wiring harness between the instrument cluster and connector C-47 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.)
16
INSPECT CAN LINE BETWEEN CONNECTOR C-41 AND BCM FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  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 at DLC-2 terminals E and F the same?
Yes
Repair or replace the wiring harness between connector C-41 and the BCM because the wiring harness is shorted between circuits.
No
Go to the next step.
17
INSPECT CAN LINE BETWEEN DSC HU/CM OR ABS HU/CM AND CONNECTOR C-41 FOR SHORT BETWEEN CIRCUITS
•  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)
•  Are the following voltages the same?
―  DSC HU/CM terminals M and J (with DSC)
―  ABS HU/CM terminals H and L (with ABS)
Yes
Go to the next step.
No
Go to Step 19.
18
INSPECT CAN LINE IN DSC HU/CM OR ABS HU/CM FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Connect connector C-41.
•  Disconnect the DSC HU/CM or ABS HU/CM connector.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at DLC-2 terminals E and F.
•  Is the voltage at DLC-2 terminals E and F the same?
Yes
Repair or replace the wiring harness between DSC HU/CM or ABS HU/CM and connector C-41 because the wiring harness is shorted between circuits.
No
Replace the DSC HU/CM or ABS HU/CM because there is a short between circuits in the DSC HU/CM or ABS HU/CM.
(See DSC HU/CM REMOVAL/INSTALLATION.)
(See ABS HU/CM REMOVAL/INSTALLATION.)
19
INSPECT CAN LINE BETWEEN CONNECTOR C-02 AND BCM FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  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 at DLC-2 terminals E and F the same?
Yes
Go to the next step.
No
•  For the MZR 2.0, 2.5, and MZR 2.3 DISI Turbo, go to Step 21.
•  For the SKYACTIV-G 2.0, go to Step 22.
20
INSPECT CAN LINE IN EHPAS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect the EHPAS control module connector.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at DLC-2 terminals E and F.
•  Is the voltage at DLC-2 terminals E and F the same?
Yes
Repair or replace the wiring harness between the EHPAS control module and connector C-02/C-41 because the wiring harness is shorted between circuits.
No
Replace the EHPAS control module because there is a short between circuits in the EHPAS control module.
(See ELECTRIC POWER STEERING OIL PUMP COMPONENT DISASSEMBLY/ASSEMBLY.)
21
INSPECT CAN-RELATED MODULES FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
Note
•  Disconnect the negative battery cable before disconnecting the connectors, connect the negative battery cable before measuring the terminal voltage, and then switch the ignition ON.
•  Connect connector C-02.
•  Measure the voltage at DLC-2 terminals E and F while removing the PCM and TCM one by one.
•  Is the voltage at DLC-2 terminals E and F the same?
Yes
Repair or replace the wiring harness between the PCM and TCM/connector C-02 because the wiring harness is shorted between circuits.
No
Replace the module which the voltage at DLC-2 terminals E and F differs when removing the module.
22
INSPECT CAN LINE BETWEEN TCM AND CONNECTOR C-02 FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition ON.
•  Measure the voltage at TCM terminals 1E and 1F.
•  Is the voltage at TCM terminals 1E and 1F the same?
Yes
Go to the next step.
No
Go to Step 24.
23
INSPECT CAN LINE IN TCM FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Connect connector C-02.
•  Disconnect the TCM connector.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at DLC-2 terminals E and F.
•  Is the voltage at DLC-2 terminals E and F the same?
Yes
Repair or replace the wiring harness between the TCM and connector C-02 because the wiring harness is shorted between circuits.
No
Replace the TCM because there is a short between circuits in the TCM.
(See TCM REMOVAL/INSTALLATION [FS5A-EL].)
(See CONTROL VALVE BODY REMOVAL/INSTALLATION [FW6A-EL].)
24
INSPECT CAN LINE IN PCM FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Connect connector C-02.
•  Disconnect the PCM connector.
•  Connect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at DLC-2 terminals E and F.
•  Is the voltage at DLC-2 terminals E and F the same?
Yes
Repair or replace the wiring harness between the PCM and connector C-02 because the wiring harness is shorted between circuits.
No
Replace the PCM because there is a short between circuits in the PCM.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)