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

id100211001100

Caution

•  Perform the following malfunction diagnosis only when it is diagnosed with a short between circuits 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

am3zzw00013672

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 BETWEEN CONNECTOR C-34 AND DLC-2 FOR SHORT BETWEEN CIRCUITS •  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 at DLC-2 terminals L and K the same?	Yes	Go to Step 5.
		No	Go to the next step.
2	INSPECT BETWEEN CONNECTOR C-34 AND PARKING SENSOR CONTROL MODULE FOR SHORT BETWEEN CIRCUITS •  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].) •  Inspect for continuity between parking sensor control module terminals AA and AB. •  Is there continuity?	Yes	Go to the next step.
		No	Go to Step 4.
3	INSPECT PARKING SENSOR CONTROL MODULE FOR SHORT BETWEEN CIRCUITS •  Disconnect the parking sensor control module connector. •  Inspect for continuity between parking sensor control module terminals AA and AB (wiring harness side). •  Is there continuity?	Yes	Repair or replace the wiring harness between the parking sensor control module and connector C-34 because the wiring harness is shorted between circuits.
		No	Replace the parking sensor control module because there is a short between circuits inside the parking sensor control module. (See PARKING SENSOR CONTROL MODULE REMOVAL/INSTALLATION.)
4	INSPECT INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS •  Disconnect the instrument cluster connector. •  Inspect for continuity between instrument cluster terminals C and E (wiring harness side). •  Is there continuity?	Yes	Repair or replace the wiring harness between the instrument cluster and connector C-34 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.)
5	INSPECT JB No.2 FOR SHORT BETWEEN CIRCUITS •  Disconnect connector C-33. •  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 instrument cluster terminals C and E. •  Is the voltage at instrument cluster terminals C and E the same?	Yes	Replace the JB No.2 because there is a short between circuits in the JB No.2.
		No	Go to the next step.
6	INSPECT BETWEEN CONNECTOR C-33 AND DLC-2 FOR SHORT BETWEEN CIRCUITS •  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].) •  Inspect for continuity between DLC-2 terminals L and K. •  Is there continuity?	Yes	Repair or replace the wiring harness between connector C-33 and DLC-2 because the wiring harness is shorted between circuits.
		No	Go to the next step.
7	INSPECT BETWEEN CONNECTOR C-33 AND CLIMATE CONTROL UNIT FOR SHORT BETWEEN CIRCUITS •  Inspect for continuity between climate control unit terminals 1S and 1U. (with full-auto air conditioner (dual type)) •  Inspect for continuity between climate control unit terminals D and B. (with full-auto air conditioner (single type)) •  Is there continuity?	Yes	Go to the next step.
		No	Go to Step 9.
8	INSPECT CLIMATE CONTROL UNIT FOR SHORT BETWEEN CIRCUITS •  Disconnect the climate control unit connector. •  Inspect for continuity between climate control unit terminals 1S and 1U (wiring harness side). (with full-auto air conditioner (dual type)) •  Inspect for continuity between climate control unit terminals D and B (wiring harness side). (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 between circuits.
		No	Replace the climate control unit because there is a short between circuits inside the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
9	INSPECT BETWEEN CONNECTOR C-08 AND CONNECTOR C-33 FOR SHORT BETWEEN CIRCUITS •  Disconnect connector C-08. •  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 at DLC-2 terminals L and K the same?	Yes	Repair or replace the wiring harness between connector C-08 and connector C-33 because the wiring harness is shorted between circuits.
		No	Go to the next step.
10	INSPECT BETWEEN REAR VEHICLE MONITORING CONTROL MODULE (LH) / BSM CONTROL MODULE (LH) AND REAR BODY CONTROL MODULE (RBCM) FOR SHORT BETWEEN CIRCUITS •  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. •  Inspect the continuity between rear vehicle monitoring control module (LH) terminals A and D. (with rear vehicle monitoring system) •  Inspect the continuity between BSM control module (LH) terminals C and D. (with BSM system) •  Is there continuity?	Yes	Go to the next step.
		No	Go to Step 13.
11	INSPECT BETWEEN REAR VEHICLE MONITORING CONTROL MODULE (LH) / BSM CONTROL MODULE (LH) AND CONNECTOR C-19 FOR SHORT BETWEEN CIRCUITS •  Disconnect connector C-19. •  Inspect the continuity between rear vehicle monitoring control module (LH) terminals A and D. (with rear vehicle monitoring system) •  Inspect the continuity between BSM control module (LH) terminals C and D. (with BSM system) •  Is there continuity?	Yes	Go to the next step.
		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 between circuits.
12	INSPECT REAR VEHICLE MONITORING CONTROL MODULE (LH) / BSM CONTROL MODULE (LH) FOR SHORT BETWEEN CIRCUITS •  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 between rear vehicle monitoring control module (LH) terminals A and D (wiring harness side). (with rear vehicle monitoring system) •  Inspect for continuity between BSM control module (LH) terminals C and D (wiring harness side). (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 between circuits.
		No	Replace the rear vehicle monitoring control module (LH) / BSM control module (LH) because there is a short between circuits 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 REAR BODY CONTROL MODULE (RBCM) FOR SHORT BETWEEN CIRCUITS •  Inspect for continuity between rear body control module (RBCM) terminals 3E and 3G (wiring harness side). •  Is there continuity?	Yes	Repair or replace the wiring harness between the rear body control module (RBCM) and connector C-08 because the wiring harness is shorted between circuits.
		No	Replace the rear body control module (RBCM) because there is a short between circuits in the rear body control module (RBCM). (See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION.)