DETERMINING SHORT BETWEEN CIRCUITS LOCATION (HS-CAN) [MULTIPLEX COMMUNICATION SYSTEM (L.H.D. (MZR-CD 2.2, MZR 2.0 DISI i-stop))]

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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 (L.H.D. (MZR-CD 2.2, MZR 2.0 DISI i-stop))].

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. (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) •  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 17.
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. (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) •  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 [L.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. (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) •  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 CONNECTOR C-17 FOR SHORT BETWEEN CIRCUIT •  Switch the ignition off. •  Disconnect the negative battery cable. •  Disconnect connector C-24. •  Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) •  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. (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) •  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-50 AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUIT •  Switch the ignition off. •  Disconnect the negative battery cable. •  Disconnect connector C-50. •  Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) •  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-50 AND KEYLESS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS •  Switch the ignition ON. •  Measure the voltage at keyless control module connector terminals 2K and 2L. •  Is the voltage at keyless control module connector terminals 2K and 2L the same?	Yes	Go to the next step.
		No	Go to Step 10.
9	INSPECT CAN LINE IN KEYLESS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS •  Switch the ignition off. •  Disconnect the negative battery cable. •  Connect connector C-50. •  Disconnect the keyless control module connector. •  Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) •  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-50 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 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-50. •  Disconnect the SAS control module. •  Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) •  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-50 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 CONNECTOR C-49 AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUIT •  Switch the ignition off. •  Disconnect the negative battery cable. •  Disconnect connector C-49. •  Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) •  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 14.
		No	Go to the next step.
12	INSPECT CAN LINE BETWEEN AFS CONTROL MODULE AND CONNECTOR C-49 FOR SHORT BETWEEN CIRCUITS •  Switch the ignition ON. •  Measure the voltage at AFS control module terminals B and A. •  Is the voltage at AFS control module terminals B and A the same?	Yes	Go to the next step.
		No	Repair or replace the wiring harness between connector C-50 and connector C-49 because the wiring harness is shorted between circuits.
13	INSPECT CAN LINE IN AFS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS •  Switch the ignition off. •  Disconnect the negative battery cable. •  Connect connector C-49. •  Disconnect the AFS control module. •  Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) •  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-49 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 AFS (ADAPTIVE FRONT LIGHTING SYSTEM) CONTROL MODULE REMOVAL/INSTALLATION.)
14	INSPECT CAN LINE BETWEEN DLC-2 AND CONNECTOR C-42 FOR SHORT BETWEEN CIRCUITS •  Switch the ignition off. •  Disconnect the negative battery cable. •  Disconnect connector C-42. •  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.
15	INSPECT CAN LINE BETWEEN CONNECTOR C-42 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-49 and connector C-42 because the wiring harness is shorted between circuits.
16	INSPECT CAN LINE IN INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS •  Switch the ignition off. •  Disconnect the negative battery cable. •  Connect connector C-42. •  Disconnect the instrument cluster connector. •  Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) •  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-42 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.)
17	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. (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) •  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.
18	INSPECT CAN LINE BETWEEN DSC 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 •  Are the following voltages the same? ―  DSC HU/CM terminals M and J	Yes	Go to the next step.
		No	Go to Step 20.
19	INSPECT CAN LINE IN DSC HU/CM FOR SHORT BETWEEN CIRCUITS •  Switch the ignition off. •  Disconnect the negative battery cable. •  Connect connector C-41. •  Disconnect the DSC HU/CM connector. •  Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) •  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 and connector C-41 because the wiring harness is shorted between circuits.
		No	Replace the DSC HU/CM because there is a short between circuits in the DSC HU/CM. (See DSC HU/CM REMOVAL/INSTALLATION.)
20	INSPECT CAN-RELATED MODULES FOR SHORT BETWEEN CIRCUITS •  Switch the ignition off. •  Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) 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-41. •  Measure the voltage at DLC-2 terminals E and F while removing the PCM and EHPAS control module 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 EHPAS control module/connector C-41 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.