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 connector C-34.
•  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 parking sensor control module connector.
•  Connect connector C-34.
•  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.
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 instrument cluster connector.
•  Connect connector C-34.
•  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.
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.
•  Connect connector C-34.
•  Disconnect connector C-33.
•  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 climate control unit connector.
•  Connect connector C-33.
•  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.
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.
•  Connect connector C-33.
•  Disconnect the connector C-08.
•  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 rear body control module (RBCM) connector.
•  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 connector C-19.
•  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 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.
•  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).
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.
•  Connect connector C-08.
•  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).
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.