DETERMINING SHORT TO GROUND 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 to ground 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 FOR SHORT TO GROUND BETWEEN BCM AND INSTRUMENT CLUSTER •  Disconnect the negative battery cable. •  Disconnect connector 1 which has the BCM 1A and 1B terminals. •  Inspect for continuity at the following terminals: ―  Between DLC-2 terminal F and body ground ―  Between DLC-2 terminal E and body ground •  Is there continuity?	Yes	Go to the next step.
		No	Go to Step 17.
2	INSPECT CAN LINE INSIDE BCM FOR SHORT TO GROUND •  Disconnect connector 2 which has the BCM 2A and 2B terminals. •  Inspect for continuity at the following terminals: ―  Between DLC-2 terminal F and body ground ―  Between DLC-2 terminal E and body ground •  Is there continuity?	Yes	Go to the next step.
		No	Replace the BCM because there is a short to ground in the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [L.H.D.].)
3	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-17 AND INSTRUMENT CLUSTER •  Disconnect connector C-17. •  Inspect for continuity at the following terminals: ―  Between DLC-2 terminal F and body ground ―  Between DLC-2 terminal E and body ground •  Is there continuity?	Yes	Go to Step 7.
		No	Go to the next step.
4	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-17 AND REAR VEHICLE MONITORING CONTROL MODULE (RH) •  Inspect for continuity at the following terminals: ―  Between rear vehicle monitoring control module (RH) terminal L and body ground ―  Between rear vehicle monitoring control module (RH) terminal I and body ground •  Is there continuity?	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 to ground.
5	INSPECT FOR SHORT TO GROUND BETWEEN REAR VEHICLE MONITORING CONTROL MODULE (RH) AND CONNECTOR C-24 •  Disconnect connector C-24. •  Inspect for continuity at the following terminals: ―  Between rear vehicle monitoring control module (RH) terminal L and body ground ―  Between rear vehicle monitoring control module (RH) terminal I and body ground •  Is there continuity?	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 to ground.
6	INSPECT CAN LINE IN REAR VEHICLE MONITORING CONTROL MODULE (RH) FOR SHORT TO GROUND •  Disconnect the rear vehicle monitoring control module (RH) connector. •  Inspect for continuity at the following terminals: ―  Between rear vehicle monitoring control module (RH) terminal L (wiring harness side) and body ground ―  Between rear vehicle monitoring control module (RH) terminal I (wiring harness side) and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between rear vehicle monitoring control module (RH) and connector C-24 because the wiring harness is shorted to ground.
		No	Replace the rear vehicle monitoring control module (RH) because there is a short to ground in the rear vehicle monitoring control module (RH). (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
7	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-50 AND INSTRUMENT CLUSTER •  Disconnect connector C-50. •  Inspect for continuity at the following terminals: ―  Between DLC-2 terminal F and body ground ―  Between DLC-2 terminal E and body ground •  Is there continuity?	Yes	Go to Step 11.
		No	Go to the next step.
8	INSPECT FOR SHORT TO GROUND BETWEEN KEYLESS CONTROL MODULE AND CONNECTOR C-50 •  Inspect for continuity at the following terminals: ―  Between keyless control module terminal 2K and body ground ―  Between keyless control module terminal 2L and body ground •  Is there continuity?	Yes	Go to the next step.
		No	Go to Step 10.
9	INSPECT CAN LINE IN KEYLESS CONTROL MODULE FOR SHORT TO GROUND •  Disconnect the keyless control module connector. •  Inspect for continuity at the following terminals: ―  Between keyless control module terminal 2K (wiring harness side) and body ground ―  Between keyless control module terminal 2L (wiring harness side) and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between the keyless control module and connector C-50 because the wiring harness is shorted to ground.
		No	Replace the keyless control module because there is a short to ground in the keyless control module. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION.)
10	INSPECT CAN LINE IN SAS CONTROL MODULE FOR SHORT TO GROUND •  Disconnect the SAS control module connector. •  Inspect for continuity at the following terminals: ―  Between SAS control module terminal 3K (wiring harness side) and body ground ―  Between SAS control module terminal 3L (wiring harness side) and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between the SAS control module and connector C-50 because the wiring harness is shorted to ground.
		No	Replace the SAS control module because there is a short to ground in the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
11	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-49 AND INSTRUMENT CLUSTER •  Disconnect connector C-49. •  Inspect for continuity at the following terminals: ―  Between DLC-2 terminal F and body ground ―  Between DLC-2 terminal E and body ground •  Is there continuity?	Yes	Go to Step 14.
		No	Go to the next step.
12	INSPECT FOR SHORT TO GROUND BETWEEN AFS CONTROL MODULE AND CONNECTOR C-49 •  Inspect for continuity at the following terminals: ―  Between AFS control module terminal B and body ground ―  Between AFS control module terminal A and body ground •  Is there continuity?	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 to ground.
13	INSPECT CAN LINE IN AFS CONTROL MODULE FOR SHORT TO GROUND •  Disconnect the AFS control module connector. •  Inspect for continuity at the following terminals: ―  Between AFS control module terminal B (wiring harness side) and body ground ―  Between AFS control module terminal A (wiring harness side) and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between the AFS control module and connector C-49 because the wiring harness is shorted to ground.
		No	Replace the AFS control module because there is a short to ground in the AFS control module. (See AFS (ADAPTIVE FRONT LIGHTING SYSTEM) CONTROL MODULE REMOVAL/INSTALLATION.)
14	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-42 AND DLC-2 •  Disconnect connector C-42. •  Inspect for continuity at the following terminals: ―  Between DLC-2 terminal F and body ground ―  Between DLC-2 terminal E and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between DLC-2 and connector C-42 because the wiring harness is shorted to ground.
		No	Go to the next step.
15	INSPECT FOR SHORT TO GROUND BETWEEN INSTRUMENT CLUSTER AND CONNECTOR C-42 •  Inspect for continuity at the following terminals: ―  Instrument cluster terminal 2B and body ground ―  Instrument cluster terminal 2D and body ground •  Is there continuity?	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 to ground.
16	INSPECT CAN LINE IN INSTRUMENT CLUSTER FOR SHORT TO GROUND •  Disconnect the instrument cluster connector. •  Inspect for continuity at the following terminals: ―  Between instrument cluster terminal 2B (wiring harness side) and body ground ―  Between instrument cluster terminal 2D (wiring harness side) and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between the instrument cluster and connector C-42 because the wiring harness is shorted to ground.
		No	Replace the instrument cluster because there is a short to ground in the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
17	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-41 AND BCM •  Connect connector 1 which has BCM terminals 1A and 1B. •  Disconnect connector C-41. •  Inspect for continuity at the following terminals: ―  Between DLC-2 terminal F and body ground ―  Between DLC-2 terminal E and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness because the wiring harness is shorted to ground between connector C-41 and the BCM.
		No	Go to the next step.
18	INSPECT FOR SHORT TO GROUND BETWEEN DSC HU/CM AND CONNECTOR C-41 •  Inspect for continuity at the following terminals: ―  Between DSC HU/CM terminal M and body ground ―  Between DSC HU/CM terminal J and body ground •  Is there continuity?	Yes	Go to the next step.
		No	Go to Step 20.
19	INSPECT CAN LINE IN DSC HU/CM FOR SHORT TO GROUND •  Disconnect DSC HU/CM connector. •  Inspect for continuity at the following terminals: ―  Between DSC HU/CM terminal M (wiring harness side) and body ground ―  Between DSC HU/CM terminal J (wiring harness side) and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between DSC HU/CM and connector C-41 because there is a short to ground in the wiring harness .
		No	Replace the DSC HU/CM because there is a short to ground in the DSC HU/CM. (See DSC HU/CM REMOVAL/INSTALLATION.)
20	INSPECT CAN-RELATED MODULES FOR SHORT TO GROUND •  Connect connector C-41. •  Verify the continuity between the following terminals while removing the PCM and EHPAS control module one by one. ―  Between DLC-2 terminal F and body ground ―  Between DLC-2 terminal E and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between the PCM and EHPAS control module/connector C-41 because the wiring harness is shorted to ground.
		No	Replace the module in which there was no continuity when it was removed.