DETERMINING SHORT TO POWER SUPPLY 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 the power supply 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.

•  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 CONNECTOR C-34 AND DLC-2 •  Switch the ignition off. •  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. •  Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  Switch the ignition ON (engine off). •  Measure the voltage at DLC-2 terminals L and K. •  Is the voltage between 1.5 — 3.5 V?	Yes	Go to the next step.
		No	Go to Step 5.
2	INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-34 AND PARKING SENSOR CONTROL MODULE •  Measure the voltage at parking sensor control module terminals AA and AB. •  Is the voltage between 1.5 — 3.5 V?	Yes	Go to Step 4.
		No	Go to the next step.
3	INSPECT PARKING SENSOR CONTROL MODULE FOR SHORT TO POWER SUPPLY •  Switch the ignition off. •  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 the parking sensor control module connector. •  Connect connector C-34. •  Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  Switch the ignition ON (engine off). •  Measure the voltage at DLC-2 terminals L and K. •  Is the voltage between 1.5 — 3.5 V?	Yes	Replace the parking sensor control module because there is a short to the power supply in the parking sensor control module. (See PARKING SENSOR CONTROL MODULE REMOVAL/INSTALLATION.)
		No	Repair or replace the wiring harness between the parking sensor control module and connector C-34 because the wiring harness is shorted to the power supply.
4	INSPECT INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY •  Switch the ignition off. •  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 the instrument cluster connector. •  Connect connector C-34. •  Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  Switch the ignition ON (engine off). •  Measure the voltage at DLC-2 terminals L and K. •  Is the voltage between 1.5 — 3.5 V?	Yes	Replace the instrument cluster because there is a short to the power supply in the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
		No	Repair or replace the wiring harness between the instrument cluster and connector C-34 because the wiring harness is shorted to the power supply.
5	INSPECT JB No.2 FOR SHORT TO POWER SUPPLY •  Switch the ignition off. •  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  Connect connector C-34. •  Disconnect connector C-33. •  Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  Switch the ignition ON (engine off). •  Measure the voltage at instrument cluster terminals C and E. •  Is the voltage between 1.5 — 3.5 V?	Yes	Go to the next step.
		No	Replace the JB No.2 because there is a short to the power supply in the JB No.2.
6	INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-33 AND DLC-2 •  Measure the voltage at DLC-2 terminals L and K. •  Is the voltage 0 V?	Yes	Go to the next step.
		No	Repair or replace the wiring harness between the DLC-2 and connector C-33 because the wiring harness is shorted to the power supply.
7	INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-33 AND CLIMATE CONTROL UNIT •  Measure the voltage at climate control unit terminals 1S and 1U. (with full-auto air conditioner (dual type)) •  Measure the voltage at climate control unit terminals D and B. (with full-auto air conditioner (single type)) •  Is the voltage between 1.5 — 3.5 V?	Yes	Go to Step 9.
		No	Go to the next step.
8	INSPECT CLIMATE CONTROL UNIT FOR SHORT TO POWER SUPPLY •  Switch the ignition off. •  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 the climate control unit connector. •  Connect connector C-33. •  Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  Switch the ignition ON (engine off). •  Measure the voltage at DLC-2 terminals L and K. •  Is the voltage between 1.5 — 3.5 V?	Yes	Replace the climate control unit because there is a short to the power supply in the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
		No	Repair or replace the wiring harness between the climate control unit and connector C-33 because the wiring harness is shorted to the power supply.
9	INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-33 AND CONNECTOR C-08 •  Switch the ignition off. •  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  Connect connector C-33. •  Disconnect the connector C-08. •  Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  Switch the ignition ON (engine off). •  Measure the voltage at DLC-2 terminals L and K. •  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-33 and connector C-08 because the wiring harness is shorted to the power supply.
10	INSPECT FOR SHORT TO POWER SUPPLY BETWEEN REAR VEHICLE MONITORING CONTROL MODULE (LH) / BSM CONTROL MODULE (LH) AND REAR BODY CONTROL MODULE (RBCM) •  Switch the ignition off. •  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 the rear body control module (RBCM) connector. •  Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  Switch the ignition ON (engine off). •  Measure the voltage at rear vehicle monitoring control module (LH) terminals A and D. (with rear vehicle monitoring system) •  Measure the voltage at BSM control module (LH) terminals C and D. (with BSM system) •  Is the voltage between 1.5 — 3.5 V?	Yes	Go to Step 13.
		No	Go to the next step.
11	INSPECT FOR SHORT TO POWER SUPPLY BETWEEN REAR VEHICLE MONITORING CONTROL MODULE (LH) / BSM CONTROL MODULE (LH) AND CONNECTOR C-19 •  Switch the ignition off. •  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-19. •  Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  Switch the ignition ON (engine off). •  Measure the voltage at rear vehicle monitoring control module (LH) terminals A and D. (with rear vehicle monitoring system) •  Measure the voltage at BSM control module (LH) terminals C and D. (with BSM system) •  Is the voltage between 1.5 — 3.5 V?	Yes	Repair or replace the wiring harness between the rear body control module (RBCM) and connector C-19 because the wiring harness is shorted to the power supply.
		No	Go to the next step.
12	INSPECT REAR VEHICLE MONITORING CONTROL MODULE (LH) / BSM CONTROL MODULE (LH) FOR SHORT TO POWER SUPPLY •  Switch the ignition off. •  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 the rear vehicle monitoring control module (LH) connector. (with rear vehicle monitoring system) •  Disconnect the BSM control module (LH) connector. (with BSM system) •  Connect connector C-19. •  Connect the rear body control module (RBCM) connector. •  Connect connector C-08. •  Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  Switch the ignition ON (engine off). •  Measure the voltage at DLC-2 terminals L and K. •  Is the voltage between 1.5 — 3.5 V?	Yes	Replace the rear vehicle monitoring control module (LH) / BSM control module (LH) because there is a short to power supply in the rear vehicle monitoring control module (LH). (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.) (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)
		No	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 the power supply.
13	INSPECT REAR BODY CONTROL MODULE (RBCM) FOR SHORT TO POWER SUPPLY •  Switch the ignition off. •  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  Connect connector C-08. •  Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  Switch the ignition ON (engine off). •  Measure the voltage at DLC-2 terminals L and K. •  Is the voltage between 1.5 — 3.5 V?	Yes	Replace the rear body control module (RBCM) because there is a short to the power supply 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 the power supply.