DETERMINING SHORT BETWEEN CIRCUITS LOCATION (HS-CAN) [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5, SKYACTIV-D 2.2 (MTX)]

id100210000800

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-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5, SKYACTIV-D 2.2 (MTX)].)

System wiring diagram

am3zzw00016997

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 FRONT BODY CONTROL MODULE (FBCM) AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS
•  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 at DLC-2 terminals F and E the same?
Yes
Go to Step 5.
No
Go to the next step.
2
INSPECT FRONT BODY CONTROL MODULE (FBCM) FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Inspect for continuity between front body control module (FBCM) terminals 2K and 2I.
•  Is there continuity?
Yes
Replace the front body control module (FBCM) because there is a short between circuits in the front body control module (FBCM).
(See FRONT BODY CONTROL MODULE (FBCM) REMOVAL/INSTALLATION.)
No
Go to the next step.
3
INSPECT BETWEEN DSC HU/CM AND FRONT BODY CONTROL MODULE (FBCM) FOR SHORT BETWEEN CIRCUITS
•  Inspect for continuity between DSC HU/CM terminals AF and AC.
•  Is there continuity?
Yes
Go to the next step.
No
Go to Step 39.
4
INSPECT DSC HU/CM FOR SHORT BETWEEN CIRCUITS
•  Disconnect the DSC HU/CM connector.
•  Inspect for continuity between DSC HU/CM terminals AF and AC (wiring harness side).
•  Is there continuity?
Yes
Repair or replace the wiring harness between the DSC HU/CM and front body control module (FBCM) because the wiring harness is shorted between circuits.
No
Replace the DSC HU/CM because there is a short between circuits in the DSC HU/CM.
(See DSC HU/CM REMOVAL/INSTALLATION.)
5
INSPECT BETWEEN CONNECTOR C-01 AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect connector C-01.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off).
•  Measure the voltage at DLC-2 terminals F and E.
•  Is the voltage at DLC-2 terminals F and E the same?
Yes
Go to Step 8.
No
Go to the next step.
6
INSPECT BETWEEN TCM AND CONNECTOR C-01 FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Inspect for continuity between TCM terminals E and F.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness between the front body control module (FBCM) and connector C-01 because the wiring harness is shorted between circuits.
7
INSPECT TCM FOR SHORT BETWEEN CIRCUITS
•  Disconnect the TCM connector.
•  Inspect for continuity between TCM terminals E and F (wiring harness side).
•  Is there continuity?
Yes
Repair or replace the wiring harness between the TCM and connector C-01 because the wiring harness is shorted between circuits.
No
Replace the TCM because there is a short between circuits in the TCM.
(See CONTROL VALVE BODY REMOVAL/INSTALLATION [FW6A-EL].)
(See CONTROL VALVE BODY REMOVAL/INSTALLATION [CW6A-EL].)
8
INSPECT BETWEEN CONNECTORS C-32 AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS
•  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 at DLC-2 terminals F and E the same?
Yes
Go to Step 14.
No
•  Go to the next step. (with i-ELOOP)
•  Go to Step 14. (with AFS system / auto leveling system)
9
INSPECT BETWEEN DC-DC CONVERTER (i-ELOOP) AND CONNECTOR C-32 FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Inspect for continuity between DC-DC converter (i-ELOOP) terminals 1A and 1C.
•  Is there continuity?
Yes
Go to the next step.
No
Go to Step 12.
10
INSPECT BETWEEN DC-DC CONVERTER (i-ELOOP) AND CONNECTOR C-05 FOR SHORT BETWEEN CIRCUITS
•  Disconnect connector C-05.
•  Inspect for continuity between DC-DC converter (i-ELOOP) terminals 1A and 1C.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness between connector C-32 and connector C-05 because the wiring harness is shorted between circuits.
11
INSPECT DC-DC CONVERTER (i-ELOOP) FOR SHORT BETWEEN CIRCUITS
•  Disconnect the DC-DC converter (i-ELOOP) connector.
•  Inspect for continuity between DC-DC converter (i-ELOOP) terminals 1A and 1C (wiring harness side).
•  Is there continuity?
Yes
Repair or replace the wiring harness between the DC-DC converter (i-ELOOP) and connector C-05 because the wiring harness is shorted between circuits.
No
Replace the DC-DC converter (i-ELOOP) because there is a short between circuits in the DC-DC converter (i-ELOOP).
(See DC-DC CONVERTER (i-ELOOP) REMOVAL/INSTALLATION [i-ELOOP].)
12
INSPECT BETWEEN AFS CONTROL MODULE / AUTO LEVELING CONTROL MODULE AND CONNECTOR C-32 FOR SHORT BETWEEN CIRCUITS
•  Inspect for continuity between AFS control module / auto leveling control module terminals A and B.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness between connector C-01 and connector C-32 because the wiring harness is shorted between circuits.
13
INSPECT AFS CONTROL MODULE / AUTO LEVELING CONTROL MODULE FOR SHORT BETWEEN CIRCUITS
•  Disconnect the AFS control module / auto leveling control module connector.
•  Inspect for continuity between AFS control module / auto leveling control module terminals A and B (wiring harness side).
•  Is there continuity?
Yes
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 between circuits.
No
Replace the AFS control module / auto leveling control module because there is a short between circuits 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.)
14
INSPECT BETWEEN CONNECTOR C-03 AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS
•  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 at DLC-2 terminals F and E the same?
Yes
Go to the next step.
No
Repair or replace the wiring harness between connector C-32 and connector C-03 because the wiring harness is shorted between circuits.
15
INSPECT BETWEEN CONNECTOR C-12 AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS
•  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 at DLC-2 terminals F and E the same?
Yes
Go to Step 22.
No
Go to the next step.
16
INSPECT BETWEEN LASER SENSOR / FORWARD SENSING CAMERA (FSC) AND CONNECTORS C-12 FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Inspect for continuity between laser sensor terminals D and C (with smart city brake support (SCBS)).
•  Inspect for continuity between forward sensing camera (FSC) terminals E and C (with forward sensing camera (FSC)).
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness between connector C-03 and connector C-12 because the wiring harness is shorted between circuits.
17
INSPECT BETWEEN CONNECTOR C-42 AND LASER SENSOR FOR SHORT BETWEEN CIRCUITS
•  Disconnect connector C-42.
•  Inspect for continuity between laser sensor terminals D and C.
•  Is there continuity?
Yes
Go to the next step.
No
Go to Step 19.
18
INSPECT LASER SENSOR FOR SHORT BETWEEN CIRCUITS
•  Disconnect the laser sensor connector.
•  Inspect for continuity between laser sensor terminals D and C (wiring harness side).
•  Is there continuity?
Yes
Repair or replace the wiring harness between the laser sensor and connector C-42 because the wiring harness is shorted between circuits.
No
Replace the laser sensor because there is a short between circuits in the laser sensor.
(See LASER SENSOR REMOVAL/INSTALLATION.)
19
INSPECT BETWEEN FORWARD SENSING CAMERA (FSC) AND CONNECTOR C-42 FOR SHORT BETWEEN CIRCUITS
•  Inspect for continuity between forward sensing camera (FSC) terminals E and C.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness between connector C-12 and connector C-42 because the wiring harness is shorted between circuits.
20
INSPECT BETWEEN FORWARD SENSING CAMERA (FSC) AND CONNECTOR C-27 FOR SHORT BETWEEN CIRCUITS
•  Disconnect connector C-27.
•  Inspect for continuity between forward sensing camera (FSC) terminals E and C.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness between connector C-42 and connector C-27 because the wiring harness is shorted between circuits.
21
INSPECT FORWARD SENSING CAMERA (FSC) FOR SHORT BETWEEN CIRCUITS
•  Disconnect the forward sensing camera (FSC) connector.
•  Inspect for continuity between forward sensing camera (FSC) terminals E and C (wiring harness side).
•  Is there continuity?
Yes
Repair or replace the wiring harness between the forward sensing camera (FSC) and connector C-27 because the wiring harness is shorted between circuits.
No
Replace the forward sensing camera (FSC) because there is a short between circuits in the forward sensing camera (FSC).
(See FORWARD SENSING CAMERA (FSC) REMOVAL/INSTALLATION.)
22
INSPECT BETWEEN CONNECTOR C-33 AND DLC-2 FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect connector C-33.
•  Inspect for continuity between DLC-2 terminals F and E.
•  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.
23
INSPECT BETWEEN START STOP UNIT AND CONNECTOR C-33 FOR SHORT BETWEEN CIRCUITS
•  Inspect for continuity between start stop unit terminals 2M and 2O.
•  Is there continuity?
Yes
Go to the next step.
No
Go to Step 25.
24
INSPECT START STOP UNIT FOR SHORT BETWEEN CIRCUITS
•  Disconnect the start stop unit connector.
•  Is there continuity between start stop unit terminals 2M and 2O (wiring harness side).
•  Is there continuity?
Yes
Repair or replace the wiring harness between the start stop unit and connector C-33 because the wiring harness is shorted between circuits.
No
Replace the start stop unit because there is a short between circuits in the start stop unit.
(See START STOP UNIT REMOVAL/INSTALLATION.)
25
INSPECT BETWEEN EPS CONTROL MODULE AND CONNECTOR C-33 FOR SHORT BETWEEN CIRCUITS
•  Inspect for continuity between EPS control module terminals 2B and 2D.
•  Is there continuity?
Yes
Go to the next step.
No
Go to Step 27.
26
INSPECT EPS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS
•  Disconnect the EPS control module connector.
•  Is there continuity between EPS control module terminals 2B and 2D (wiring harness side).
•  Is there continuity?
Yes
Repair or replace the wiring harness between the EPS control module and connector C-33 because the wiring harness is shorted between circuits.
No
Replace the EPS control module because there is a short between circuits in the EPS control module.
(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)
27
INSPECT JB No.2 FOR SHORT BETWEEN CIRCUITS
•  Connect connector C-33.
•  Disconnect 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 at DLC-2 terminals F 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.
28
INSPECT BETWEEN CONNECTIVITY MASTER UNIT (CMU) AND CONNECTOR C-34 FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Inspect for continuity between connectivity master unit (CMU) terminals 2E and 2F.
•  Is there continuity?
Yes
Go to the next step.
No
Go to Step 30.
29
INSPECT CONNECTIVITY MASTER UNIT (CMU) FOR SHORT BETWEEN CIRCUITS
•  Disconnect the connectivity master unit (CMU).
•  Inspect for continuity between connectivity master unit (CMU) terminals 2E and 2F (wiring harness side).
•  Is there continuity?
Yes
Repair or replace the wiring harness between connectivity master unit (CMU) and connector C-34 because the wiring harness is shorted between circuits.
No
Replace the connectivity master unit (CMU) because there is a short between circuits in the connectivity master unit (CMU).
(See CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION.)
30
INSPECT BETWEEN SAS CONTORL MODULE AND CONNECTOR C-34 FOR SHORT BETWEEN CIRCUITS
•  Inspect for continuity between SAS control module terminals 3K and 3L. (with connector 22-pin type)
•  Inspect for continuity between SAS control module terminals 3B and 3C. (with connector 32-pin type)
•  Is there continuity?
Yes
Go to the next step.
No
Go to Step 32.
31
INSPECT SAS CONTORL MODULE FOR SHORT BETWEEN CIRCUITS
•  Disconnect the SAS control module.
•  Inspect for continuity between SAS control module terminals 3K and 3L (wiring harness side). (with connector 22-pin type)
•  Inspect for continuity between SAS control module terminals 3B and 3C (wiring harness side). (with connector 32-pin type)
•  Is there continuity?
Yes
Repair or replace the wiring harness between SAS control module and connector C-34 because the wiring harness is shorted between circuits.
No
Replace the SAS control module because there is a short between circuits in the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
32
INSPECT BETWEEN CONNECTOR C-09 AND CONNECTOR C-34 FOR SHORT BETWEEN CIRCUITS
•  Disconnect connector C-09.
•  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 at DLC-2 terminals F and E the same?
Yes
Repair or replace the wiring harness between connector C-34 and connector C-09 because the wiring harness is shorted between circuits.
No
Go to the next step.
33
INSPECT BETWEEN AUDIO AMPLIFIER/VEHICLE CONTROL MODULE (V/C-MODULE) AND CONNECTOR C-09 FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Inspect for continuity between audio amplifier terminals 2L and 2N. (with Bose®)
•  Inspect for continuity between vehicle control module (V/C-module) terminals S and U (with mazda radar cruise control (MRCC) system).
•  Is there continuity?
Yes
Go to the next step.
No
Go to Step 38.
34
INSPECT BETWEEN AUDIO AMPLIFIER AND CONNECTOR C-40 FOR SHORT BETWEEN CIRCUITS
•  Disconnect connector C-40.
•  Inspect for continuity between audio amplifier terminals 2L and 2N.
•  Is there continuity?
Yes
Go to the next step.
No
Go to Step 36.
35
INSPECT AUDIO AMPLIFIER FOR SHORT BETWEEN CIRCUITS
•  Disconnect the audio amplifier connector.
•  Is there continuity between audio amplifier terminals 2L and 2N (wiring harness side).
•  Is there continuity?
Yes
Repair or replace the wiring harness between the audio amplifier and connector C-40 because the wiring harness is shorted between circuits.
No
Replace the audio amplifier because there is a short between circuits in the audio amplifier.
(See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)
36
INSPECT BETWEEN VEHICLE CONTROL MODULE (V/C-MODULE) AND CONNECTOR C-40 FOR SHORT BETWEEN CIRCUITS
•  Inspect for continuity between vehicle control module (V/C-module) terminals S and U.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness between connector C-09 and connector C-40 because the wiring harness is shorted between circuits.
37
INSPECT VEHICLE CONTROL MODULE (V/C-MODULE) FOR SHORT BETWEEN CIRCUITS
•  Disconnect the vehicle control module (V/C-module) connector.
•  Is there continuity between vehicle control module (V/C-module) terminals S and U (wiring harness side).
•  Is there continuity?
Yes
Repair or replace the wiring harness between the vehicle control module (V/C-module) and connector C-40 because the wiring harness is shorted between circuits.
No
Replace the vehicle control module (V/C-module) because there is a short between circuits in the vehicle control module (V/C-module).
(See VEHICLE CONTROL MODULE (V/C-MODULE) REMOVAL/INSTALLATION [MAZDA RADAR CRUISE CONTROL (MRCC) SYSTEM].)
38
INSPECT INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS
•  Disconnect the instrument cluster connector.
•  Is there continuity between instrument cluster terminals B and D (wiring harness side).
•  Is there continuity?
Yes
Repair or replace the wiring harness between the instrument cluster and connector C-09 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.)
39
INSPECT PCM FOR SHORT BETWEEN CIRCUITS
•  Disconnect the PCM connector.
•  Inspect for continuity between PCM terminals 2AK and 2AL (wiring harness side).
•  Is there continuity?
Yes
Repair or replace the wiring harness between the PCM and front body control module (FBCM) because the wiring harness is shorted between circuits.
No
Replace the PCM because there is a short between circuits in the PCM.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)