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

id100210000600

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

System Wiring Diagram

am3zzw00016995

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 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) •  Disconnect 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	Go to Step 5.
		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 2P and body ground ―  Between front body control module (FBCM) terminal 2N 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 39.
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-01 AND INSTRUMENT CLUSTER •  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	Go to Step 8.
		No	Go to the next step.
6	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	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.
7	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].) (See CONTROL VALVE BODY REMOVAL/INSTALLATION [CW6A-EL].)
8	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-32 AND INSTRUMENT CLUSTER •  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	Go to Step 14.
		No	•  Go to the next step. (with i-ELOOP) •  Go to Step 12. (with AFS system / auto leveling system)
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 (i-ELOOP) REMOVAL/INSTALLATION [i-ELOOP].)
12	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	Repair or replace the wiring harness between the connector C-01 and connector C-32 because the wiring harness is shorted to ground.
13	INSPECT FOR SHORT TO GROUND BETWEEN AFS CONTROL MODULE / AUTO LEVELING CONTROL MODULE AND CONNECTOR C-32 •  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.)
14	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 connector C-32 because the wiring harness is shorted to ground.
15	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 22.
		No	Go to the next step.
16	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.
17	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 19.
18	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.)
19	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.
20	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.
21	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.)
22	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.
23	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 25.
24	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.)
25	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 27.
26	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.)
27	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.
28	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 30.
29	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.)
30	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 32.
31	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.)
32	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.
33	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 38.
34	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 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 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.
37	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].)
38	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.)
39	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 front body control module (FBCM) 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 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)