DETERMINING SHORT TO GROUND LOCATION (MS-CAN) [SKYACTIV-D 2.2 (ATX), MZR 1.6]

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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. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [SKYACTIV-D 2.2 (ATX), MZR 1.6].)

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 CONNECTOR C-34 AND INSTRUMENT CLUSTER •  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  Disconnect connector C-34. •  Inspect for continuity at the following terminals: ―  Between DLC-2 terminal L and body ground ―  Between DLC-2 terminal K and body ground •  Is there continuity?	Yes	Go to Step 5.
		No	Go to the next step.
2	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-34 AND PARKING SENSOR CONTROL MODULE •  Inspect for continuity at the following terminals: ―  Between parking sensor control module terminal AA and body ground ―  Between parking sensor control module terminal AB and body ground •  Is there continuity?	Yes	Go to the next step.
		No	Go to Step 4.
3	INSPECT CAN LINE IN PARKING SENSOR CONTROL MODULE FOR SHORT TO GROUND •  Disconnect the parking sensor control module connector. •  Inspect for continuity at the following terminals: ―  Between parking sensor control module terminal AA (wiring harness side) and body ground ―  Between parking sensor control module terminal AB (wiring harness side) and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between parking sensor control module and connector C-34 because the wiring harness is shorted to ground.
		No	Replace the parking sensor control module because there is a short to ground inside the parking sensor control module. (See PARKING SENSOR CONTROL MODULE REMOVAL/INSTALLATION.)
4	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 C (wiring harness side) and body ground ―  Between instrument cluster terminal E (wiring harness side) and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between the instrument cluster and connector C-34 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.)
5	INSPECT CAN LINE IN JB No.2 FOR SHORT TO GROUND •  Connect connector C-34. •  Disconnect connector C-33. •  Inspect for continuity at the following terminals: ―  Between instrument cluster terminal C and body ground ―  Between instrument cluster terminal E and body ground •  Is there continuity?	Yes	Replace the JB No.2 because there is a short to ground in the JB No.2.
		No	Go to the next step.
6	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-33 AND DLC-2 •  Inspect for continuity at the following terminals: ―  Between DLC-2 terminal L and body ground ―  Between DLC-2 terminal K and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between connector C-33 and DLC-2 because the wiring harness is shorted to ground.
		No	Go to the next step.
7	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-33 AND CLIMATE CONTROL UNIT •  Inspect for continuity at the following terminals: ―  Between climate control unit terminal 1S and body ground (with full-auto air conditioner (dual type)) ―  Between climate control unit terminal 1U and body ground (with full-auto air conditioner (dual type)) ―  Between climate control unit terminal D and body ground (with full-auto air conditioner (single type)) ―  Between climate control unit terminal B and body ground (with full-auto air conditioner (single type)) •  Is there continuity?	Yes	Go to the next step.
		No	Go to Step 9.
8	INSPECT CAN LINE IN CLIMATE CONTROL UNIT FOR SHORT TO GROUND •  Disconnect the climate control unit connector. •  Inspect for continuity at the following terminals: ―  Between climate control unit terminal 1S (wiring harness side) and body ground (with full-auto air conditioner (dual type)) ―  Between climate control unit terminal 1U (wiring harness side) and body ground (with full-auto air conditioner (dual type)) ―  Between climate control unit terminal D (wiring harness side) and body ground (with full-auto air conditioner (single type)) ―  Between climate control unit terminal B (wiring harness side) and body ground (with full-auto air conditioner (single type)) •  Is there continuity?	Yes	Repair or replace the wiring harness between the climate control unit and connector C-33 because the wiring harness is shorted to ground.
		No	Replace the climate control unit because there is a short to ground inside the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
9	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-08 AND CONNECTOR C-33 •  Disconnect connector C-08. •  Connect connector C-33. •  Inspect for continuity at the following terminals: ―  Between DLC-2 terminal L and body ground ―  Between DLC-2 terminal K and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between connector C-08 and connector C-33 because the wiring harness is shorted to ground.
		No	Go to the next step.
10	INSPECT FOR SHORT TO GROUND BETWEEN REAR VEHICLE MONITORING CONTROL MODULE (LH) / BSM CONTROL MODULE (LH) AND REAR BODY CONTROL MODULE (RBCM) •  Disconnect the rear body control module (RBCM) connector. •  Inspect for continuity at the following terminals: ―  Between rear body control module (RBCM) terminal 4G (wiring harness side) and body ground ―  Between rear body control module (RBCM) terminal 4J (wiring harness side) and body ground •  Is there continuity?	Yes	Go to the next step.
		No	Go to Step 13.
11	INSPECT FOR SHORT TO GROUND BETWEEN REAR VEHICLE MONITORING CONTROL MODULE (LH) / BSM CONTROL MODULE (LH) AND CONNECTOR C-19 •  Disconnect connector C-19. •  Inspect for continuity at the following terminals: ―  Between rear vehicle monitoring control module (LH) terminal A and body ground (with rear vehicle monitoring system) ―  Between rear vehicle monitoring control module (LH) terminal D and body ground (with rear vehicle monitoring system) ―  Between BSM control module (LH) terminal C and body ground (with BSM system) ―  Between BSM control module (LH) terminal D and body ground (with BSM system) •  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-19 because the wiring harness is shorted to ground.
12	INSPECT CAN LINE IN REAR VEHICLE MONITORING CONTROL MODULE (LH) / BSM CONTROL MODULE (LH) FOR SHORT TO GROUND •  Disconnect the rear vehicle monitoring control module (LH) connector. (with rear vehicle monitoring system) •  Disconnect the BSM control module (LH) connector. (with BSM system) •  Inspect for continuity at the following terminals: ―  Between rear vehicle monitoring control module (LH) terminal A (wiring harness side) and body ground (with rear vehicle monitoring system) ―  Between rear vehicle monitoring control module (LH) terminal D (wiring harness side) and body ground (with rear vehicle monitoring system) ―  Between BSM control module (LH) terminal C (wiring harness side) and body ground (with BSM system) ―  Between BSM control module (LH) terminal D (wiring harness side) and body ground (with BSM system) •  Is there continuity?	Yes	Repair or replace the wiring harness between the rear vehicle monitoring control module (LH) / BSM control module (LH) and connector C-19 because the wiring harness is shorted to ground.
		No	Replace the rear vehicle monitoring control module (LH) / BSM control module (LH) because there is a short to ground in the rear vehicle monitoring control module (LH) / BSM control module (LH). (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.) (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)
13	INSPECT CAN LINE IN REAR BODY CONTROL MODULE (RBCM) FOR SHORT TO GROUND •  Inspect for continuity at the following terminals: ―  Between rear body control module (RBCM) terminal 3E and body ground ―  Between rear body control module (RBCM) terminal 3G and body ground •  Is there continuity?	Yes	Replace the rear body control module (RBCM) because there is a short to ground in the rear body control module (RBCM). (See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION.)
		No	Repair or replace the wiring harness between the rear body control module (RBCM) and connector C-08 because the wiring harness is shorted to ground.