DETERMINING SHORT TO POWER SUPPLY LOCATION (HS-CAN) [SKYACTIV-D 2.2 (ATX), MZR 1.6]

id100211000700

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 [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.
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.)

Step

Inspection

Action
1
INSPECT FOR SHORT TO POWER SUPPLY BETWEEN FRONT BODY CONTROL MODULE (FBCM) AND INSTRUMENT CLUSTER
•  Disconnect the negative battery cable.
•  Disconnect connector 2 which has front body control module (FBCM) terminals 2K and 2I
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Go to the next step.
No
Go to Step 4.
2
INSPECT CAN LINE BETWEEN ABS HU/CM OR DSC HU/CM AND FRONT BODY CONTROL MODULE (FBCM) FOR SHORT TO POWER SUPPLY
•  Measure the voltage at ABS HU/CM terminals H and L.(Without DSC)
•  Measure the voltage at DSC HU/CM terminals AF and AC.(With DSC)
•  Is the voltage between 1.5 — 3.5 V?
Yes
Go to Step 38.
No
Go to the next step.
3
INSPECT ABS HU/CM OR DSC HU/CM FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect the ABS HU/CM or DSC HU/CM connector.
•  Connect connector 2 which has front body control module (FBCM) terminals 2K and 2I
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Replace the ABS HU/CM or DSC HU/CM because there is a short to the power supply in the ABS HU/CM or DSC HU/CM.
(See ABS HU/CM REMOVAL/INSTALLATION.)
(See DSC HU/CM REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between ABS HU/CM or DSC HU/CM and the front body control module (FBCM) because the wiring harness is shorted to the power supply.
4
INSPECT CAN LINE BETWEEN CONNECTOR C-32 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect connector C-32.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage between 1.5 — 3.5 V?
Yes
•  Go to the next step.(With i-ELOOP)
•  Go to Step 8.(With AFS system / headlight auto leveling system)
•  Go to Step 10.(ATX)
No
Go to Step 13.
5
INSPECT CAN LINE BETWEEN DC-DC CONVERTER (i-ELOOP) AND CONNECTOR C-32 FOR SHORT TO POWER SUPPLY
•  Measure the voltage at DC-DC converter (i-ELOOP) terminals 1A and 1C.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Go to Step 8.
No
Go to the next step.
6
INSPECT CAN LINE BETWEEN DC-DC CONVERTER (i-ELOOP) AND CONNECTOR C-05 FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect connector C-05.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DC-DC converter (i-ELOOP) terminals 1A and 1C.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Repair or replace the wiring harness between connector C-32 and connector C-05 because the wiring harness is shorted to the power supply.
No
Go to the next step.
7
INSPECT DC-DC CONVERTER (i-ELOOP) FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Connect connector C-05.
•  Connect connector C-32.
•  Disconnect the DC-DC converter (i-ELOOP) connector.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Replace the DC-DC converter (i-ELOOP) because there is a short to the power supply in the DC-DC converter (i-ELOOP).
(See DC-DC CONVERTER (i-ELOOP) REMOVAL/INSTALLATION [i-ELOOP].)
No
Repair or replace the wiring harness between the DC-DC converter (i-ELOOP) and connector C-05 because the wiring harness is shorted to the power supply.
8
INSPECT CAN LINE BETWEEN AFS CONTROL MODULE / AUTO LEVELING CONTROL MODULE AND CONNECTOR C-32 FOR SHORT TO POWER SUPPLY
•  Measure the voltage at AFS control module / auto leveling control module terminals A and B.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Go to Step 10.
No
Go to the next step.
9
INSPECT AFS CONTROL MODULE / AUTO LEVELING CONTROL MODULE FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Connect connector C-32.
•  Disconnect the AFS control module / auto leveling control module connector.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage between 1.5 — 3.5 V?
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 ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE REMOVAL/INSTALLATION.)
(See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between the AFS control module / auto leveling control module and connector C-32 because the wiring harness is shorted to the power supply.
10
INSPECT CAN LINE BETWEEN TCM AND CONNECTOR C-32 FOR SHORT TO POWER SUPPLY
•  Measure the voltage at TCM terminals E and F.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Repair or replace the wiring harness between the front body control module (FBCM) and connector C-32 because the wiring harness is shorted to the power supply.
No
Go to the next step.
11
INSPECT CAN LINE BETWEEN TCM AND CONNECTOR C-01 FOR SHORT TO POWER SUPPLY
•  Disconnect connector C-01.
•  Measure the voltage at TCM terminals E and F.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Repair or replace the wiring harness between connector C-32 and connector C-01 because the wiring harness is shorted to the power supply.
No
Go to the next step.
12
INSPECT TCM FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Connect connector C-01.
•  Connect connector C-32.
•  Disconnect the TCM connector.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Replace the TCM because there is a short to the power supply in the TCM.
(See CONTROL VALVE BODY REMOVAL/INSTALLATION [FW6A-EL].)
No
Repair or replace the wiring harness between the TCM and connector C-01 because the wiring harness is shorted to the power supply.
13
INSPECT CAN LINE BETWEEN CONNECTOR C-03 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect connector C-03.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Repair or replace the wiring harness between connector C-03 and connector C-32 because the wiring harness is shorted to the power supply.
No
Go to the next step.
14
INSPECT CAN LINE BETWEEN CONNECTOR C-12 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect connector C-12.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Go to the next step.
No
Go to Step 21.
15
INSPECT CAN LINE BETWEEN CONNECTOR C-12 AND LASER SENSOR / FORWARD SENSING CAMERA (FSC) FOR SHORT TO POWER SUPPLY
•  Measure the voltage at laser sensor terminals D and C (with smart city brake support (SCBS)).
•  Measure the voltage at the forward sensing camera (FSC) terminals E and C (with forward sensing camera (FSC)).
•  Is the voltage between 1.5 — 3.5 V?
Yes
Repair or replace the wiring harness between connector C-03 and connector C-12 because the wiring harness is shorted to the power supply.
No
Go to the next step.
16
INSPECT CAN LINE BETWEEN LASER SENSOR AND CONNECTOR C-42 FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect connector C-42.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at laser sensor terminals D and C.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Go to Step 18.
No
Go to the next step.
17
INSPECT LASER SENSOR FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect the laser sensor connector.
•  Connect connector C-42.
•  Connect connector C-12.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Replace the laser sensor because there is a short to the power supply in the laser sensor.
(See LASER SENSOR REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between the laser sensor and connector C-42 because the wiring harness is shorted to the power supply.
18
INSPECT CAN LINE BETWEEN FORWARD SENSING CAMERA (FSC) AND CONNECTOR C-42 FOR SHORT TO POWER SUPPLY
•  Measure the voltage at forward sensing camera (FSC) terminals E and C.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Repair or replace the wiring harness between connector C-12 and connector C-42 because the wiring harness is shorted to the power supply.
No
Go to the next step.
19
INSPECT CAN LINE BETWEEN CONNECTOR C-27 AND FORWARD SENSING CAMERA (FSC) FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect connector C-27.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at the forward sensing camera (FSC) terminals E and C.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Repair or replace the wiring harness between connector C-42 and connector C-27 because the wiring harness is shorted to the power supply.
No
Go to the next step.
20
INSPECT FORWARD SENSING CAMERA (FSC) FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect the forward sensing camera (FSC) connector.
•  Connect connector C-42.
•  Connect connector C-12.
•  Connect connector C-27.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Replace the forward sensing camera (FSC) because there is a short to the power supply in the forward sensing camera (FSC).
(See FORWARD SENSING CAMERA (FSC) REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between the forward sensing camera (FSC) and connector C-27 because the wiring harness is shorted to the power supply.
21
INSPECT CAN LINE BETWEEN CONNECTOR C-33 AND DLC-2 FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect connector C-33.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage 0 V?
Yes
Go to the next step.
No
Repair or replace the wiring harness between connector C-33 and DLC-2 because the wiring harness is shorted to the power supply.
22
INSPECT CAN LINE BETWEEN START STOP UNIT AND CONNECTOR C-33 FOR SHORT TO POWER SUPPLY
•  Measure the voltage at start stop unit terminals 2M and 2O.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Go to Step 24.
No
Go to the next step.
23
INSPECT START STOP UNIT FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect the start stop unit connector.
•  Connect connector C-33.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Replace the start stop unit because there is a short to the power supply in the start stop unit.
(See START STOP UNIT REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between the start stop unit and connector C-33 because the wiring harness is shorted to the power supply.
24
INSPECT CAN LINE BETWEEN EPS CONTROL MODULE AND CONNECTOR C-33 FOR SHORT TO POWER SUPPLY
•  Measure the voltage at EPS control module terminals 2B and 2D.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Go to Step 26.
No
Go to the next step.
25
INSPECT EPS CONTROL MODULE FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Connect connector C-33.
•  Disconnect the EPS control module connector.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Replace the EPS control module because there is a short to the power supply in the EPS control module.
(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between the EPS control module and connector C-33 because the wiring harness is shorted to the power supply.
26
INSPECT JB No.2 FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect connector C-34.
•  Connect connector C-33.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F 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.
27
INSPECT CAN LINE BETWEEN CONNECTIVITY MASTER UNIT (CMU) AND CONNECTOR C-34 FOR SHORT TO POWER SUPPLY
•  Measure the voltage at connectivity master unit (CMU) terminals 2E and 2F.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Go to Step 29.
No
Go to the next step.
28
INSPECT CONNECTIVITY MASTER UNIT (CMU) FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Connect connector C-34.
•  Disconnect the connectivity master unit (CMU) connector.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Replace the connectivity master unit (CMU) because there is a short to the power supply in the connectivity master unit (CMU).
(See CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between the connectivity master unit (CMU) and connector C-34 because the wiring harness is shorted to the power supply.
29
INSPECT CAN LINE BETWEEN INSTRUMENT CLUSTER AND CONNECTOR C-09 FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect connector C-09.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at instrument cluster terminals B and D.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Go to the next step.
No
Go to Step 35.
30
INSPECT CAN LINE BETWEEN AUDIO AMPLIFIER / VEHICLE CONTROL MODULE (V/C-MODULE) AND CONNECTOR C-09 FOR SHORT TO POWER SUPPLY
•  Measure the voltage at audio amplifier terminals 2L and 2N. (with Bose® type audio)
•  Measure the voltage at vehicle control module (V/C-module) terminals S and U. (with mazda radar cruise control (MRCC) system)
•  Is the voltage between 1.5 — 3.5 V?
Yes
Go to Step 36.
No
Go to the next step.
31
INSPECT CAN LINE BETWEEN AUDIO AMPLIFIER AND CONNECTOR C-40 FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect connector C-40.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at audio amplifier terminals 2L and 2N.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Go to Step 33.
No
Go to the next step.
32
INSPECT AUDIO AMPLIFIER FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Connect connector C-40.
•  Connect connector C-09.
•  Connect connector C-34.
•  Disconnect the audio amplifier connector.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Replace the audio amplifier because there is a short to the power supply in the audio amplifier.
(See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between the audio amplifier and connector C-40 because the wiring harness is shorted to the power supply.
33
INSPECT CAN LINE BETWEEN VEHICLE CONTROL MODULE (V/C-MODULE) AND CONNECTOR C-40 FOR SHORT TO POWER SUPPLY
•  Measure the voltage at vehicle control module (V/C-module) terminals S and U.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Repair or replace the wiring harness between the connector C-09 and connector C-40 because the wiring harness is shorted to the power supply.
No
Go to the next step.
34
INSPECT VEHICLE CONTROL MODULE (V/C-MODULE) FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Connect connector C-40.
•  Connect connector C-09.
•  Connect connector C-34.
•  Disconnect the vehicle control module (V/C-module) connector.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Replace the vehicle control module (V/C-module) because there is a short to the power supply in the vehicle control module (V/C-module).
(See VEHICLE CONTROL MODULE (V/C-MODULE) REMOVAL/INSTALLATION [MAZDA RADAR CRUISE CONTROL (MRCC) SYSTEM].)
No
Repair or replace the wiring harness between the vehicle control module (V/C-module) and connector C-40 because the wiring harness is shorted to the power supply.
35
INSPECT INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Connect connector C-09.
•  Disconnect the instrument cluster connector.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  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-09 because the wiring harness is shorted to the power supply.
36
INSPECT SAS CONTROL MODULE FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect the SAS control module connector.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at SAS control module terminals 3K and 3L (wiring harness side). (with connector 22-pin type)
•  Measure the voltage at SAS control module terminals 3B and 3C (wiring harness side). (with connector 32-pin type)
•  Is the voltage 0 V?
Yes
Go to the next step.
No
Repair or replace the wiring harness between SAS control module and connector C-34 because the wiring harness is shorted to the power supply.
37
INSPECT CAN LINE BETWEEN CONNECTOR C-09 AND CONNECTOR C-34 FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Connect connector C-34.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage between 1.5 — 3.5 V?
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.)
No
Repair or replace the wiring harness between connector C-09 and connector C-34 because the wiring harness is shorted to the power supply.
38
INSPECT CAN LINE BETWEEN PCM AND FRONT BODY CONTROL MODULE (FBCM) FOR SHORT TO POWER SUPPLY
•  Measure the voltage at PCM terminals 2AK and 2AL (SKYACTIV-D2.2).
•  Measure the voltage at PCM terminals 1BE and 1AZ (MZR1.6).
•  Is the voltage between 1.5 — 3.5 V?
Yes
Replace the front body control module (FBCM) because there is a short to the power supply in the front body control module (FBCM).
(See FRONT BODY CONTROL MODULE (FBCM) REMOVAL/INSTALLATION.)
No
Go to the next step.
39
INSPECT PCM FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect the PCM connector.
•  Connect connector 2 which has front body control module (FBCM) terminals 2K and 2I
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage between 1.5 — 3.5 V?
Yes
Replace the PCM because there is a short to the power supply in the PCM.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
(See PCM REMOVAL/INSTALLATION [MZR 1.6].)
No
Repair or replace the wiring harness between the PCM and front body control module (FBCM) because the wiring harness is shorted to the power supply.