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Determination Procedure

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
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.
Step Inspection Action
1 INSPECT FOR SHORT TO GROUND BETWEEN FRONT BODY CONTROL MODULE (FBCM) AND INSTRUMENT CLUSTER Yes Go to Step 17.
No Go to the next step.
2 INSPECT CAN LINE IN FRONT BODY CONTROL MODULE (FBCM) FOR SHORT TO GROUND
  • Inspect for continuity at the following terminals:
    • Between front body control module (FBCM) terminal 2R and body ground
      • Between front body control module (FBCM) terminal 2L and body ground
  • Is there continuity?
 Yes Replace the front body control module (FBCM) because there is a short to ground in the front body control module (FBCM).
(See FRONT BODY CONTROL MODULE (FBCM) REMOVAL/INSTALLATION .)
No Go to the next step.
3 INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-01 AND FRONT BODY CONTROL MODULE (FBCM)
  • Disconnect connector C-01.
  • Connect connector 2 which has front body control module (FBCM) terminals 2P and 2N.
  • Inspect for continuity at the following terminals:
    • Between DLC-2 terminal F and body ground
      • Between DLC-2 terminal E and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between the front body control module (FBCM) and connector C-01 because the wiring harness is shorted to ground.
No Go to the next step.
4 INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-01 AND TCM
  • Inspect for continuity at the following terminals:
    • Between TCM terminal E and body ground
      • Between TCM terminal F and body ground
  • Is there continuity?
 Yes Go to the next step.
No Go to Step 6.
5 INSPECT CAN LINE IN TCM FOR SHORT TO GROUND
  • Disconnect the TCM connector.
  • Inspect for continuity at the following terminals:
    • Between TCM terminal E (wiring harness side) and body ground
      • Between TCM terminal F (wiring harness side) and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between the TCM and connector C-01 because the wiring harness is shorted to ground.
No Replace the TCM because there is a short to ground in the TCM.
(See CONTROL VALVE BODY REMOVAL/INSTALLATION [FW6A-EL] .)
6 INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-32 AND CONNECTOR C-01
  • Disconnect connector C-32.
  • Connect connector C-01.
  • Inspect for continuity at the following terminals:
    • Between DLC-2 terminal F and body ground
      • Between DLC-2 terminal E and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between connector C-32 and connector C-01 because the wiring harness is shorted to ground.
No Go to the next step.
7 INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-32 AND ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE/AUTO LEVELING CONTROL MODULE
  • Inspect for continuity at the following terminals:
    • Between adaptive front lighting system (AFS) control module/auto leveling control module terminal A and body ground
      • Between adaptive front lighting system (AFS) control module/auto leveling control module terminal B and body ground
  • Is there continuity?
 Yes Go to the next step.
No Go to Step 9.
8 INSPECT CAN LINE IN ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE/AUTO LEVELING CONTROL MODULE FOR SHORT TO GROUND
  • Disconnect the adaptive front lighting system (AFS) control module/auto leveling control module connector.
  • Inspect for continuity at the following terminals:
    • Between adaptive front lighting system (AFS) control module/auto leveling control module terminal A (wiring harness side) and body ground
      • Between adaptive front lighting system (AFS) control module/auto leveling control module terminal B (wiring harness side) and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between the adaptive front lighting system (AFS) control module/auto leveling control module and connector C-32 because the wiring harness is shorted to ground.
No Replace the adaptive front lighting system (AFS) control module/auto leveling control module because there is a short to ground in the adaptive front lighting system (AFS) control module/auto leveling control module.
(See ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE REMOVAL/INSTALLATION .)
(See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION .)
9 INSPECT FOR SHORT TO GROUND BETWEEN DC-DC CONVERTER (i-ELOOP) AND CONNECTOR C-32
  • Inspect for continuity at the following terminals:
    • Between DC-DC converter (i-ELOOP) terminal 1A and body ground
      • Between DC-DC converter (i-ELOOP) terminal 1C and body ground
  • Is there continuity?
 Yes Go to the next step.
No Go to Step 12.
10 INSPECT FOR SHORT TO GROUND BETWEEN DC-DC CONVERTER (i-ELOOP) AND CONNECTOR C-05
  • Disconnect connector C-05.
  • Inspect for continuity at the following terminals:
    • Between DC-DC converter (i-ELOOP) terminal 1A and body ground
      • Between DC-DC converter (i-ELOOP) terminal 1C and body ground
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace the wiring harness between connector C-05 and connector C-32 because the wiring harness is shorted to ground.
11 INSPECT CAN LINE IN DC-DC CONVERTER (i-ELOOP) FOR SHORT TO GROUND
  • Disconnect the DC-DC converter (i-ELOOP) connector.
  • Inspect for continuity at the following terminals:
    • Between DC-DC converter (i-ELOOP) terminal 1A (wiring harness side) and body ground
      • Between DC-DC converter (i-ELOOP) terminal 1C (wiring harness side) and body ground
  • 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 to ground.
No Replace the DC-DC converter (i-ELOOP) because there is a short to ground in the DC-DC converter (i-ELOOP).
(See DC-DC CONVERTER REMOVAL/INSTALLATION [i-ELOOP] .)
12 INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-60 AND CONNECTOR C-32
  • Disconnect connector C-60.
  • Connect connector C-32.
  • Inspect for continuity at the following terminals:
    • Between DLC-2 terminal F and body ground
      • Between DLC-2 terminal E and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between connector C-60 and connector C-32 because the wiring harness is shorted to ground.
No Go to the next step.
13 INSPECT FOR SHORT TO GROUND BETWEEN DSC HU/CM AND CONNECTOR C-60
  • Inspect for continuity at the following terminals:
    • Between DSC HU/CM terminal AF and body ground
      • Between DSC HU/CM terminal AC and body ground
  • Is there continuity?
 Yes Go to the next step.
No Go to Step 15.
14 INSPECT CAN LINE IN DSC HU/CM FOR SHORT TO GROUND
  • Disconnect the DSC HU/CM connector.
  • Inspect for continuity at the following terminals:
    • Between DSC HU/CM terminal AF (wiring harness side) and body ground
    • Between DSC HU/CM terminal AC (wiring harness side) and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between the DSC HU/CM and connector C-60 because the wiring harness is shorted to ground.
No Replace the DSC HU/CM because there is a short to ground in the DSC HU/CM.
(See DSC HU/CM REMOVAL/INSTALLATION .)
15 INSPECT FOR SHORT TO GROUND BETWEEN RADAR UNIT AND CONNECTOR C-60
  • Inspect for continuity at the following terminals:
    • Between radar unit terminal D and body ground
      • Between radar unit terminal C and body ground
  • Is there continuity?
 Yes Go to the next step.
No Go to Step 43.
16 INSPECT CAN LINE IN RADAR UNIT FOR SHORT TO GROUND
  • Disconnect the radar unit connector.
  • Inspect for continuity at the following terminals:
    • Between radar unit terminal D (wiring harness side) and body ground
      • Between radar unit terminal C (wiring harness side) and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between the radar unit and connector C-60 because the wiring harness is shorted to ground.
No Replace the radar unit because there is a short to ground in the radar unit.
(See RADAR UNIT REMOVAL/INSTALLATION .)
17 INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-03 AND INSTRUMENT CLUSTER
  • Disconnect connector C-03.
  • Inspect for continuity at the following terminals:
    • Between DLC-2 terminal F and body ground
      • Between DLC-2 terminal E and body ground
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace the wiring harness between connector C-03 and front body control module (FBCM) because the wiring harness is shorted to ground.
18 INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-12 AND INSTRUMENT CLUSTER
  • Disconnect connector C-12.
  • Inspect for continuity at the following terminals:
    • Between DLC-2 terminal F and body ground
      • Between DLC-2 terminal E and body ground
  • Is there continuity?
 Yes Go to Step 21.
No Go to the next step.
19 INSPECT FOR SHORT TO GROUND BETWEEN FORWARD SENSING CAMERA (FSC) AND CONNECTOR C-12
  • Inspect for continuity at the following terminals:
    • Between forward sensing camera (FSC) terminal M and body ground
      • Between forward sensing camera (FSC) terminal N and body ground
  • 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 to ground.
20 INSPECT CAN LINE IN FORWARD SENSING CAMERA (FSC) FOR SHORT TO GROUND
  • Disconnect the forward sensing camera (FSC) connector.
  • Inspect for continuity at the following terminals:
    • Between forward sensing camera (FSC) terminal M (wiring harness side) and body ground
      • Between forward sensing camera (FSC) terminal N (wiring harness side) and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between the forward sensing camera (FSC) and connector C-12 because the wiring harness is shorted to ground.
No Replace the forward sensing camera (FSC) because there is a short to ground in the forward sensing camera (FSC).
(See FORWARD SENSING CAMERA (FSC) REMOVAL/INSTALLATION .)
21 INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-33 AND DLC-2
  • Disconnect connector C-33.
  • Inspect for continuity at the following terminals:
    • Between DLC-2 terminal F and body ground
      • Between DLC-2 terminal E and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between DLC-2 and connector C-33 because the wiring harness is shorted to ground.
No Go to the next step.
22 INSPECT FOR SHORT TO GROUND BETWEEN EPS CONTROL MODULE AND CONNECTOR C-33
  • Inspect for continuity at the following terminals:
    • Between EPS control module terminal 2B and body ground
      • Between EPS control module terminal 2D and body ground
  • Is there continuity?
 Yes Go to the next step.
No Go to Step 24.
23 INSPECT CAN LINE IN EPS CONTROL MODULE FOR SHORT TO GROUND
  • Disconnect the EPS control module connector.
  • Inspect for continuity at the following terminals:
    • Between EPS control module terminal 2B (wiring harness side) and body ground
      • Between EPS control module terminal 2D (wiring harness side) and body ground
  • 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 to ground.
No Replace the EPS control module because there is a short to ground in the EPS control module.
(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION .)
24 INSPECT FOR SHORT TO GROUND BETWEEN START STOP UNIT AND CONNECTOR C-33
  • Inspect for continuity at the following terminals:
    • Between start stop unit terminal 2M and body ground
      • Between start stop unit terminal 2O and body ground
  • Is there continuity?
 Yes Go to the next step.
No Go to Step 26.
25 INSPECT CAN LINE IN START STOP UNIT FOR SHORT TO GROUND
  • Disconnect the start stop unit connector.
  • Inspect for continuity at the following terminals:
    • Between start stop unit terminal 2M (wiring harness side) and body ground
      • Between start stop unit terminal 2O (wiring harness side) and body ground
  • 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 to ground.
No Replace the start stop unit because there is a short to ground in the start stop unit.
(See START STOP UNIT REMOVAL/INSTALLATION .)
26 INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-33 AND INSTRUMENT CLUSTER
  • Inspect for continuity at the following terminals:
    • Between instrument cluster terminal B and body ground
      • Between instrument cluster terminal D and body ground
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace the wiring harness between connector C-12 and connector C-33 because the wiring harness is shorted to ground.
27 INSPECT CAN LINE IN JB No. 2 FOR SHORT TO GROUND
  • Disconnect connector C-34.
  • Connect connector C-33.
  • Inspect for continuity at the following terminals:
    • Between DLC-2 terminal F and body ground
      • Between DLC-2 terminal E and body ground
  • Is there continuity?
 Yes Replace the JB No. 2 because there is a short to ground in the JB No. 2.
No Go to the next step.
28 INSPECT FOR SHORT TO GROUND BETWEEN CONNECTIVITY MASTER UNIT (CMU) AND CONNECTOR C-34
  • Inspect for continuity at the following terminals:
    • Between connectivity master unit (CMU) terminal 2E and body ground
      • Between connectivity master unit (CMU) terminal 2F and body ground
  • Is there continuity?
 Yes Go to the next step.
No Go to Step 30.
29 INSPECT CAN LINE IN CONNECTIVITY MASTER UNIT (CMU) FOR SHORT TO GROUND
  • Disconnect the connectivity master unit (CMU) connector.
  • Inspect for continuity at the following terminals:
    • Between connectivity master unit (CMU) terminal 2E (wiring harness side) and body ground
      • Between connectivity master unit (CMU) terminal 2F (wiring harness side) and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between the connectivity master unit (CMU) and connector C-34 because the wiring harness is shorted to ground.
No Replace the connectivity master unit (CMU) because there is a short to ground in the connectivity master unit (CMU).
(See CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION .)
30 INSPECT FOR SHORT TO GROUND BETWEEN SAS CONTROL MODULE AND CONNECTOR C-34
  • Inspect for continuity at the following terminals:
    • Between SAS control module terminal 3B and body ground
      • Between SAS control module terminal 3C and body ground
  • Is there continuity?
 Yes Go to the next step.
No Go to Step 32.
31 INSPECT CAN LINE IN SAS CONTROL MODULE FOR SHORT TO GROUND
  • Disconnect the SAS control module connector.
  • Inspect for continuity at the following terminals:
    • Between SAS control module terminal 3B (wiring harness side) and body ground
      • Between SAS control module terminal 3C (wiring harness side) and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between the SAS control module and connector C-34 because the wiring harness is shorted to ground.
No Replace the SAS control module because there is a short to ground in the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .)
(See SAS CONTROL MODULE REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM] .)
32 INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-34 AND CONNECTOR C-09
  • Disconnect connector C-09.
  • Connect connector C-34.
  • Inspect for continuity at the following terminals:
    • Between DLC-2 terminal F and body ground
      • Between DLC-2 terminal E and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between the connector C-34 and connector C-09 because the wiring harness is shorted to ground.
No Go to the next step.
33 INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-09 AND CONNECTOR C-40
  • Disconnect connector C-40.
  • Connect connector C-09.
  • Inspect for continuity at the following terminals:
    • Between DLC-2 terminal F and body ground
      • Between DLC-2 terminal E and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between the connector C-09 and connector C-40 because the wiring harness is shorted to ground.
No Go to the next step.
34 INSPECT FOR SHORT TO GROUND BETWEEN AUDIO AMPLIFIER AND CONNECTOR C-40
  • Inspect for continuity at the following terminals:
    • Between audio amplifier terminal 2L and body ground
      • Between audio amplifier terminal 2N and body ground
  • Is there continuity?
 Yes Go to the next step.
No Go to Step 36.
35 INSPECT CAN LINE IN AUDIO AMPLIFIER FOR SHORT TO GROUND
  • Disconnect the audio amplifier connector.
  • Inspect for continuity at the following terminals:
    • Between audio amplifier terminal 2L (wiring harness side) and body ground
      • Between audio amplifier terminal 2N (wiring harness side) and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between the audio amplifier and connector C-40 because the wiring harness is shorted to ground.
No Replace the audio amplifier because there is a short to ground in the audio amplifier.
(See AUDIO AMPLIFIER REMOVAL/INSTALLATION .)
36 INSPECT FOR SHORT TO GROUND BETWEEN ELECTRIC PARKING BRAKE CONTROL MODULE AND CONNECTOR C-40
  • Inspect for continuity at the following terminals:
    • Between electric parking brake control module terminal AD and body ground
      • Between electric parking brake control module terminal AB and body ground
  • Is there continuity?
 Yes Go to the next step.
No Go to Step 38.
37 INSPECT CAN LINE IN ELECTRIC PARKING BRAKE CONTROL MODULE FOR SHORT TO GROUND
  • Disconnect the electric parking brake control module connector.
  • Inspect for continuity at the following terminals:
    • Between electric parking brake control module terminal AD (wiring harness side) and body ground
      • Between electric parking brake control module terminal AB (wiring harness side) and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between the electric parking brake control module and connector C-40 because the wiring harness is shorted to ground.
No Replace the electric parking brake control module because there is a short to ground in the electric parking brake control module.
(See ELECTRIC PARKING BRAKE CONTROL MODULE REMOVAL/INSTALLATION .)
38 INSPECT FOR SHORT TO GROUND BETWEEN OCCUPANT CLASSIFICATION SENSOR AND CONNECTOR C-40
  • Inspect for continuity at the following terminals:
    • Between occupant classification sensor terminal 3D and body ground
      • Between occupant classification sensor terminal 3C and body ground
  • Is there continuity?
 Yes Go to the next step.
No Go to Step 41.
39 INSPECT FOR SHORT TO GROUND BETWEEN OCCUPANT CLASSIFICATION SENSOR AND CONNECTOR C-26
  • Disconnect connector C-26.
  • Inspect for continuity at the following terminals:
    • Between occupant classification sensor terminal 3D and body ground
      • Between occupant classification sensor terminal 3C and body ground
    • Is there continuity?
 Yes Go to the next step.
No Repair or replace the wiring harness between connector C-26 and connector C-40 because the wiring harness is shorted to ground.
40 INSPECT CAN LINE IN OCCUPANT CLASSIFICATION SENSOR FOR SHORT TO GROUND
  • Disconnect the occupant classification sensor connector.
  • Inspect for continuity at the following terminals:
    • Between occupant classification sensor terminal 3D (wiring harness side) and body ground
      • Between occupant classification sensor terminal 3C (wiring harness side) and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between the occupant classification sensor and connector C-26 because the wiring harness is shorted to ground.
No Replace the occupant classification sensor because there is a short to ground in the occupant classification sensor.
(See OCCUPANT CLASSIFICATION SENSOR REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .)
41 INSPECT FOR SHORT TO GROUND BETWEEN INSTRUMENT CLUSTER AND CONNECTOR C-09
  • Disconnect connector C-09.
  • Inspect for continuity at the following terminals:
    • Between instrument cluster terminal B and body ground
      • Between instrument cluster terminal D and body ground
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace the wiring harness between connector C-40 and connector C-09 because the wiring harness is shorted to ground.
42 INSPECT CAN LINE IN INSTRUMENT CLUSTER FOR SHORT TO GROUND
  • Disconnect the instrument cluster connector.
  • Inspect for continuity at the following terminals:
    • Between instrument cluster terminal B (wiring harness side) and body ground
      • Between instrument cluster terminal D (wiring harness side) and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between the instrument cluster and connector C-09 because the wiring harness is shorted to ground.
No Replace the instrument cluster because there is a short to ground in the instrument cluster.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
43 INSPECT CAN LINE IN PCM FOR SHORT TO GROUND
  • Disconnect the PCM connector.
  • Inspect for continuity at the following terminals:
    • Between PCM terminal 2AK (wiring harness side) and body ground
      • Between PCM terminal 2AL (wiring harness side) and body ground
  • Is there continuity?
 Yes Repair or replace the wiring harness between the PCM and connector C-60 because the wiring harness is shorted to ground.
No Replace the PCM because there is a short to ground in the PCM.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
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