DETERMINING SHORT TO POWER SUPPLY LOCATION (HS-CAN)
2016 – MX-5 – Multiplex Communication System
DETERMINING SHORT TO POWER SUPPLY LOCATION (HS-CAN)
CAUTION:
-
Perform the following malfunction diagnosis only when it is diagnosed with a short to power supply by CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW.)
System Wiring Diagram
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.
NOTE:
-
If the ignition does not turn on even if the ignition is switched ON, switch the ignition ON referring to the forced ignition ON procedure. (See FORCED IGNITION ON.)
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Step |
Inspection |
Action |
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1 |
INSPECT CAN LINE BETWEEN BCM AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY
|
Yes |
Go to the next step. |
|
No |
Go to Step 8. |
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2 |
INSPECT CAN LINE BETWEEN PCM AND BCM FOR SHORT TO POWER SUPPLY
|
Yes |
Replace the BCM because there is a short to the power supply in the BCM. |
|
No |
Go to the next step. |
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3 |
INSPECT CAN LINE BETWEEN CONNECTORS C-38 AND C-39 AND BCM FOR SHORT TO POWER SUPPLY
|
Yes |
Go to the next step. |
|
No |
Repair or replace the wiring harness between the BCM and connectors C-38 and C-39 because the wiring harness is shorted to the power supply. |
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4 |
INSPECT DSC HU/CM FOR SHORT TO POWER SUPPLY
|
Yes |
Replace the DSC HU/CM because there is a short to the power supply in the DSC HU/CM. |
|
No |
Go to the next step. |
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5 |
INSPECT EVP CONTROL UNIT FOR SHORT TO POWER SUPPLY
|
Yes |
Replace the EVP control unit because there is a short to the power supply in the EVP control unit. |
|
No |
Go to the next step. |
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6 |
INSPECT EPS CONTROL MODULE FOR SHORT TO POWER SUPPLY
|
Yes |
Replace the EPS control module because there is a short to the power supply in the EPS control module. |
|
No |
Go to the next step. |
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7 |
INSPECT PCM FOR SHORT TO POWER SUPPLY
|
Yes |
Replace the PCM because there is a short to the power supply in the PCM. |
|
No |
Repair or replace the wiring harness between the PCM and connectors C-38 and C-39 because the wiring harness is shorted to the power supply. |
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8 |
INSPECT CAN LINE BETWEEN CONNECTOR C-42 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY
|
Yes |
Go to the next step. |
|
No |
Go to Step 12. |
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9 |
INSPECT CAN LINE BETWEEN AUDIO AMPLIFIER AND CONNECTOR C-42 FOR SHORT TO POWER SUPPLY
|
Yes |
Go to Step 11. |
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No |
Go to the next step. |
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10 |
INSPECT AUDIO AMPLIFIER FOR SHORT TO POWER SUPPLY
|
Yes |
Replace the audio amplifier because there is a short to the power supply in the audio amplifier. |
|
No |
Repair or replace the wiring harness between the audio amplifier and connector C-42 because the wiring harness is shorted to the power supply. |
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|
11 |
INSPECT TCM FOR SHORT TO POWER SUPPLY
|
Yes |
Replace the TCM because there is a short to the power supply in the TCM. |
|
No |
Repair or replace the wiring harness between the TCM and connector C-42 and BCM because the wiring harness is shorted to the power supply. |
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|
12 |
INSPECT CAN LINE BETWEEN CONNECTOR C-25 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY
|
Yes |
Go to the next step. |
|
No |
Go to Step 15. |
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13 |
INSPECT CAN LINE BETWEEN CONNECTOR C-30 AND CONNECTOR C-42 AND CONNECTOR C-25 FOR SHORT TO POWER SUPPLY
|
Yes |
Repair or replace the wiring harness between the connector C-30 and connector C-42 and connector C-25 because the wiring harness is shorted to the power supply. |
|
No |
Go to the next step. |
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|
14 |
INSPECT OCCUPANT CLASSIFICATION SENSOR FOR SHORT TO POWER SUPPLY
|
Yes |
Replace the occupant classification sensor because there is a short to the power supply in the occupant classification sensor. (See OCCUPANT CLASSIFICATION SENSOR REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].) |
|
No |
Repair or replace the wiring harness between the occupant classification sensor and connector C-30 because the wiring harness is shorted to the power supply. |
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15 |
INSPECT CAN LINE BETWEEN CONNECTOR C-14 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY
|
Yes |
Repair or replace the wiring harness between the connector C-25 and connector C-14 because the wiring harness is shorted to the power supply. |
|
No |
Go to the next step. |
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|
16 |
INSPECT CAN LINE BETWEEN CONNECTOR C-17 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY
|
Yes |
Go to the next step. |
|
No |
Go to Step 19. |
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17 |
INSPECT CAN LINE BETWEEN FORWARD SENSING CAMERA (FSC) AND CONNECTOR C-17 FOR SHORT TO POWER SUPPLY
|
Yes |
Repair or replace the wiring harness between the connector C-14 and connector C-17 because the wiring harness is shorted to the power supply. |
|
No |
Go to the next step. |
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18 |
INSPECT FORWARD SENSING CAMERA (FSC) FOR SHORT TO POWER SUPPLY
|
Yes |
Replace the forward sensing camera (FSC) because there is a short to the power supply in the forward sensing camera (FSC). |
|
No |
Repair or replace the wiring harness between the forward sensing camera (FSC) and connector C-17 because the wiring harness is shorted to the power supply. |
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19 |
INSPECT CAN LINE BETWEEN CONNECTOR C-41 AND DLC-2 FOR SHORT TO POWER SUPPLY
|
Yes |
Go to the next step. |
|
No |
Repair or replace the wiring harness between connector C-41 and DLC-2 because the wiring harness is shorted to the power supply. |
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20 |
INSPECT CAN LINE BETWEEN AFS CONTROL MODULE / AUTO LEVELING CONTROL MODULE AND CONNECTORS C-28 AND C-29 FOR SHORT TO POWER SUPPLY
|
Yes |
Go to Step 22. |
|
No |
Go to the next step. |
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21 |
INSPECT AFS CONTROL MODULE / AUTO LEVELING CONTROL MODULE FOR SHORT TO POWER SUPPLY
|
Yes |
Replace the AFS control module / auto leveling control module because there is a short to the power supply in the AFS control module / auto leveling control module. (See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION.) (See ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE REMOVAL/INSTALLATION.) |
|
No |
Repair or replace the wiring harness between the AFS control module / auto leveling control module and connector C-41 because the wiring harness is shorted to the power supply. |
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22 |
INSPECT CAN LINE BETWEEN START STOP UNIT AND CONNECTOR C-41 FOR SHORT TO POWER SUPPLY
|
Yes |
Go to Step 25. |
|
No |
Go to the next step. |
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23 |
INSPECT CAN LINE BETWEEN START STOP UNIT AND CONNECTOR C-19 FOR SHORT TO POWER SUPPLY
|
Yes |
Go to Step 30. |
|
No |
Repair or replace the wiring harness between the connector C-41 and connector C-19 because the wiring harness is shorted to the power supply. |
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24 |
INSPECT START STOP UNIT FOR SHORT TO POWER SUPPLY
|
Yes |
Replace the start stop unit because there is a short to the power supply in the start stop unit. |
|
No |
Repair or replace the wiring harness between the start stop unit and connector C-19 because the wiring harness is shorted to the power supply. |
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25 |
INSPECT CAN LINE BETWEEN CONNECTIVITY MASTER UNIT (CMU) AND CONNECTOR C-41 FOR SHORT TO POWER SUPPLY
|
Yes |
Go to Step 27. |
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No |
Go to the next step. |
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26 |
INSPECT CONNECTIVITY MASTER UNIT (CMU) FOR SHORT TO POWER SUPPLY
|
Yes |
Replace the connectivity master unit (CMU) because there is a short to the power supply in the connectivity master unit (CMU). |
|
No |
Repair or replace the wiring harness between the connectivity master unit (CMU) and connector C-41 because the wiring harness is shorted to the power supply. |
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27 |
INSPECT CAN LINE BETWEEN INSTRUMENT CLUSTER AND CONNECTOR C-41 FOR SHORT TO POWER SUPPLY
|
Yes |
Go to Step 29. |
|
No |
Go to the next step. |
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28 |
INSPECT INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY
|
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-41 because the wiring harness is shorted to the power supply. |
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29 |
INSPECT SAS CONTROL MODULE FOR SHORT TO POWER SUPPLY
|
Yes |
Replace the SAS control module connector because there is a short to the power supply in the SAS control module connector. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].) (See SAS CONTROL MODULE REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM].) |
|
No |
Repair or replace the wiring harness between the SAS control module and connector C-41 because the wiring harness is shorted to the power supply. |
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