DETERMINING SHORT TO GROUND LOCATION (HS-CAN) [SKYACTIV-D 1.5]

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Caution

•  Perform the following malfunction diagnosis only when it is diagnosed with a short to ground by CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [SKYACTIV-D 1.5].)

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.

Step	Inspection		Action
1	INSPECT FOR SHORT TO GROUND BETWEEN FRONT BODY CONTROL MODULE (FBCM) AND INSTRUMENT CLUSTER •  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) •  Disconnect connector 2 which has front body control module (FBCM) terminals 2K and 2I. •  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 13.
		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 2K and body ground ―  Between front body control module (FBCM) terminal 2I 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 DSC HU/CM AND FRONT BODY CONTROL MODULE (FBCM) •  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 5.(ATX) •  Go to Step 6.(MTX)
4	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 front body control module (FBCM) 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.)
5	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-32 AND FRONT BODY CONTROL MODULE (FBCM) •  Connect connector 2 which has front body control module (FBCM) terminals 2K and 2I. •  Disconnect 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-32 and front body control module (FBCM) because the wiring harness is shorted to ground.
		No	Go to Step 8.
6	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-01 AND FRONT BODY CONTROL MODULE (FBCM) •  Connect connector 2 which has front body control module (FBCM) terminals 2K and 2I. •  Disconnect 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-01 and front body control module (FBCM) 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 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.
8	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-32 AND AFS CONTROL MODULE / AUTO LEVELING CONTROL MODULE •  Inspect for continuity at the following terminals: ―  Between AFS control module / auto leveling control module terminal A and body ground ―  Between 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 10.
9	INSPECT CAN LINE IN AFS CONTROL MODULE / AUTO LEVELING CONTROL MODULE FOR SHORT TO GROUND •  Disconnect the AFS control module / auto leveling control module connector. •  Inspect for continuity at the following terminals: ―  Between AFS control module / auto leveling control module terminal A (wiring harness side) and body ground ―  Between 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 AFS control module / auto leveling control module and connector C-32 because the wiring harness is shorted to ground.
		No	Replace the AFS control module / auto leveling control module because there is a short to ground 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.)
10	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-32 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 38.
11	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-01 AND TCM •  Disconnect connector C-01. •  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	Repair or replace the wiring harness between connector C-32 and connector C-01 because the wiring harness is shorted to ground.
12	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 [FN4A-EL].) (See CONTROL VALVE BODY REMOVAL/INSTALLATION [FW6A-EL].) (See CONTROL VALVE BODY REMOVAL/INSTALLATION [GW6A-EL].) (See CONTROL VALVE BODY REMOVAL/INSTALLATION [CW6A-EL].) (See CONTROL VALVE BODY REMOVAL/INSTALLATION [EW6A-EL].)
13	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.
14	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.
15	INSPECT FOR SHORT TO GROUND BETWEEN LASER SENSOR / FORWARD SENSING CAMERA (FSC) AND CONNECTOR C-12 •  Inspect for continuity at the following terminals: ―  Between laser sensor terminal D and body ground (with smart city brake support (SCBS)) ―  Between laser sensor terminal C and body ground (with smart city brake support (SCBS)) ―  Between forward sensing camera (FSC) terminal E and body ground (with forward sensing camera (FSC)) ―  Between forward sensing camera (FSC) terminal C and body ground (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 to ground.
16	INSPECT FOR SHORT TO GROUND BETWEEN LASER SENSOR AND CONNECTOR C-42 •  Disconnect connector C-42. •  Inspect for continuity at the following terminals: ―  Between laser sensor terminal D and body ground ―  Between laser sensor terminal C and body ground •  Is there continuity?	Yes	Go to the next step.
		No	Go to Step 18.
17	INSPECT CAN LINE IN LASER SENSOR FOR SHORT TO GROUND •  Disconnect the laser sensor connector. •  Inspect for continuity at the following terminals: ―  Between laser sensor terminal D (wiring harness side) and body ground ―  Between laser sensor terminal C (wiring harness side) and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between the laser sensor and connector C-42 because the wiring harness is shorted to ground.
		No	Replace the laser sensor because there is a short to ground in the laser sensor. (See LASER SENSOR REMOVAL/INSTALLATION.)
18	INSPECT FOR SHORT TO GROUND BETWEEN FORWARD SENSING CAMERA (FSC) AND CONNECTOR C-42 •  Inspect for continuity at the following terminals: ―  Between forward sensing camera (FSC) terminal E and body ground ―  Between forward sensing camera (FSC) terminal C 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-42 because the wiring harness is shorted to ground.
19	INSPECT FOR SHORT TO GROUND BETWEEN FORWARD SENSING CAMERA (FSC) AND CONNECTOR C-27 •  Disconnect connector C-27. •  Inspect for continuity at the following terminals: ―  Between forward sensing camera (FSC) terminal E and body ground ―  Between forward sensing camera (FSC) terminal C and body ground •  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 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 E (wiring harness side) and body ground ―  Between forward sensing camera (FSC) terminal C (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-27 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 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 24.
23	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.)
24	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 26.
25	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.)
26	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-34 AND INSTRUMENT CLUSTER •  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.
27	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 3K and body ground. (with connector 22-pin type) ―  Between SAS control module terminal 3L and body ground. (with connector 22-pin type) ―  Between SAS control module terminal 3B and body ground. (with connector 32-pin type) ―  Between SAS control module terminal 3C and body ground. (with connector 32-pin type) •  Is there continuity?	Yes	Go to the next step.
		No	Go to Step 29.
28	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 3K (wiring harness side) and body ground. (with connector 22-pin type) ―  Between SAS control module terminal 3L (wiring harness side) and body ground. (with connector 22-pin type) ―  Between SAS control module terminal 3B (wiring harness side) and body ground. (with connector 32-pin type) ―  Between SAS control module terminal 3C (wiring harness side) and body ground. (with connector 32-pin type) •  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.)
29	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 31.
30	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.)
31	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-09 AND INSTRUMENT CLUSTER •  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.
32	INSPECT FOR SHORT TO GROUND BETWEEN AUDIO AMPLIFIER/VEHICLE CONTROL MODULE (V/C-MODULE) AND CONNECTOR C-09 •  Inspect for continuity at the following terminals: ―  Between audio amplifier terminal 2L and body ground (with Bose® type audio) ―  Between audio amplifier terminal 2N and body ground (with Bose® type audio) ―  Between vehicle control module (V/C-module) terminal S and body ground (with mazda radar cruise control (MRCC) system) ―  Between vehicle control module (V/C-module) terminal U and body ground (with mazda radar cruise control (MRCC) system) •  Is there continuity?	Yes	Go to the next step.
		No	Go to Step 37.
33	INSPECT FOR SHORT TO GROUND BETWEEN AUDIO AMPLIFIER AND CONNECTOR C-40 •  Disconnect 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 35.
34	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.)
35	INSPECT FOR SHORT TO GROUND BETWEEN VEHICLE CONTROL MODULE (V/C-MODULE) AND CONNECTOR C-40 •  Inspect for continuity at the following terminals: ―  Between vehicle control module (V/C-module) terminal S and body ground ―  Between vehicle control module (V/C-module) terminal U 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.
36	INSPECT CAN LINE IN VEHICLE CONTROL MODULE (V/C-MODULE) FOR SHORT TO GROUND •  Disconnect the vehicle control module (V/C-module) connector. •  Inspect for continuity at the following terminals: ―  Between vehicle control module (V/C-module) terminal S (wiring harness side) and body ground ―  Between vehicle control module (V/C-module) terminal U (wiring harness side) and body ground •  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 to ground.
		No	Replace the vehicle control module (V/C-module) because there is a short to ground in the vehicle control module (V/C-module). (See VEHICLE CONTROL MODULE (V/C-MODULE) REMOVAL/INSTALLATION [MAZDA RADAR CRUISE CONTROL (MRCC) SYSTEM].)
37	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.)
38	INSPECT CAN LINE IN PCM FOR SHORT TO GROUND •  Disconnect the PCM connector. •  Inspect for continuity at the following terminals: ―  Between PCM terminal 2C (wiring harness side) and body ground ―  Between PCM terminal 2D (wiring harness side) and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between the PCM and connector C-32 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-D 1.5].)