DETERMINING SHORT BETWEEN CIRCUITS LOCATION (HS-CAN)

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2014 - Mazda6 - Multiplex Communication System

DETERMINING SHORT BETWEEN CIRCUITS LOCATION (HS-CAN)

CAUTION:

Perform the following malfunction diagnosis only when it is diagnosed with a short between circuits by CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW.

System wiring diagram

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 BETWEEN FRONT BODY CONTROL MODULE (FBCM) AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) Disconnect connector 2 which has front body control module (FBCM) terminals 2K and 2I. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) 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.
1		No	Go to the next step.
2	INSPECT FRONT BODY CONTROL MODULE (FBCM) FOR SHORT BETWEEN CIRCUITS 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.)
2		No	Go to the next step.
3	INSPECT BETWEEN AFS CONTROL MODULE AND FRONT BODY CONTROL MODULE (FBCM) FOR SHORT BETWEEN CIRCUITS Inspect for continuity between AFS control module terminals AB and AD. Is there continuity?	Yes	Go to the next step.
3		No	Go to Step 35.
4	INSPECT AFS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS Disconnect the AFS control module connector. Inspect for continuity between AFS control module terminals AB and AD (wiring harness side). Is there continuity?	Yes	Repair or replace the wiring harness between the AFS control module and front body control module (FBCM) because the wiring harness is shorted between circuits.
4		No	Replace the AFS control module because there is a short between circuits in the AFS control module. (See ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE REMOVAL/INSTALLATION.)
5	INSPECT BETWEEN CONNECTOR C-04 AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS Switch the ignition off (LOCK). Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) Disconnect connector C-04. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) 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.
5		No	Repair or replace the wiring harness between the front body control module (FBCM) and connector C-04 because the wiring harness is shorted between circuits.
6	INSPECT BETWEEN CONNECTORS C-49 AND C-50 AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS Switch the ignition off (LOCK). Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) Disconnect connectors C-49 and C-50. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) 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 11.
6		No	Go to the next step.
7	INSPECT BETWEEN VEHICLE CONTROL MODULE (V/C-MODULE) / DC-DC CONVERTER (i-ELOOP) AND CONNECTORS C-49 AND C-50 FOR SHORT BETWEEN CIRCUITS Switch the ignition off (LOCK). Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) Inspect for continuity between vehicle control module (V/C-module) terminals S and U (with smart brake support). Inspect for continuity between DC-DC converter (i-ELOOP) terminals 1A and 1C (with i-ELOOP system). Is there continuity?	Yes	Go to the next step.
7		No	Repair or replace the wiring harness between connector C-04 and connectors C-49 and C-50 because the wiring harness is shorted between circuits.
8	INSPECT BETWEEN VEHICLE CONTROL MODULE (V/C-MODULE) AND CONNECTORS C-49 AND C-50 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.
8		No	Go to Step 10.
9	INSPECT VEHICLE CONTROL MODULE (V/C-MODULE) FOR SHORT BETWEEN CIRCUITS Disconnect the vehicle control module (V/C-module) connector. Inspect for 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 connectors C-49 and C-50 because the wiring harness is shorted between circuits.
9		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) INSPECTION [MAZDA RADAR CRUISE CONTROL (MRCC) SYSTEM].)
10	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 connectors C-49 and C-50 because the wiring harness is shorted between circuits.
10		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 REMOVAL/INSTALLATION [i-ELOOP].)
11	INSPECT BETWEEN CONNECTORS C-51 AND C-52 AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS Switch the ignition off (LOCK). Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) Disconnect connectors C-51 and C-52. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) 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 15.
11		No	Go to the next step.
12	INSPECT BETWEEN POSITION MEMORY CONTROL MODULE AND CONNECTORS C-51 AND C-52 FOR SHORT BETWEEN CIRCUITS Switch the ignition off (LOCK). Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) Inspect for continuity between position memory control module terminals 1C and 1E. Is there continuity?	Yes	Go to the next step.
12		No	Repair or replace the wiring harness between connectors C-49 and C-50 and connectors C-51 and C-52 because the wiring harness is shorted between circuits.
13	INSPECT BETWEEN POSITION MEMORY CONTROL MODULE AND CONNECTOR C-55 FOR SHORT BETWEEN CIRCUITS Disconnect connector C-55. Inspect for continuity between position memory control module terminals 1C and 1E. Is there continuity?	Yes	Go to the next step.
13		No	Repair or replace the wiring harness between connector C-55 and connectors C-51 and C-52 because the wiring harness is shorted between circuits.
14	INSPECT POSITION MEMORY CONTROL MODULE FOR SHORT BETWEEN CIRCUITS Disconnect the position memory control module connector. Inspect for continuity between position memory control module terminals 1C and 1E (wiring harness side). Is there continuity?	Yes	Repair or replace the wiring harness between the position memory control module and connector C-55 because the wiring harness is shorted between circuits.
14		No	Replace the position memory control module because there is a short between circuits in the position memory control module. (See FRONT SEAT REMOVAL/INSTALLATION.)
15	INSPECT BETWEEN CONNECTOR C-10 AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS Switch the ignition off (LOCK). Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) Disconnect connector C-10. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) 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.
15		No	Repair or replace the wiring harness between connector C-10 and connectors C-51, C-52 because the wiring harness is shorted between circuits.
16	INSPECT BETWEEN CONNECTOR C-11 AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS Switch the ignition off (LOCK). Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) Disconnect connector C-11. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) 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 23.
16		No	Go to the next step.
17	INSPECT BETWEEN LASER SENSOR / FORWARD SENSING CAMERA AND CONNECTOR C-11 FOR SHORT BETWEEN CIRCUITS Switch the ignition off (LOCK). Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) Inspect for continuity between laser sensor terminals D and C (with smart city brake support). Inspect for continuity between forward sensing camera terminals E and C (with forward sensing camera). Is there continuity?	Yes	Go to the next step.
17		No	Repair or replace the wiring harness between connector C-10 and connector C-11 because the wiring harness is shorted between circuits.
18	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.
18		No	Go to Step 20.
19	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.
19		No	Replace the laser sensor because there is a short between circuits in the laser sensor. (See LASER SENSOR REMOVAL/INSTALLATION.)
20	INSPECT BETWEEN FORWARD SENSING CAMERA AND CONNECTOR C-42 FOR SHORT BETWEEN CIRCUITS Inspect for continuity between forward sensing camera terminals E and C. Is there continuity?	Yes	Go to the next step.
20		No	Repair or replace the wiring harness between connector C-11 and connector C-42 because the wiring harness is shorted between circuits.
21	INSPECT BETWEEN FORWARD SENSING CAMERA AND CONNECTOR C-27 FOR SHORT BETWEEN CIRCUITS Disconnect connector C-27. Inspect for continuity between forward sensing camera terminals E and C. Is there continuity?	Yes	Go to the next step.
21		No	Repair or replace the wiring harness between connector C-42 and connector C-27 because the wiring harness is shorted between circuits.
22	INSPECT FORWARD SENSING CAMERA FOR SHORT BETWEEN CIRCUITS Disconnect the forward sensing camera connector. Inspect for continuity between forward sensing camera terminals E and C (wiring harness side). Is there continuity?	Yes	Repair or replace the wiring harness between the forward sensing camera and connector C-27 because the wiring harness is shorted between circuits.
22		No	Replace the forward sensing camera because there is a short between circuits in the forward sensing camera. (See FORWARD SENSING CAMERA (FSC) REMOVAL/INSTALLATION.)
23	INSPECT BETWEEN DLC-2 AND CONNECTOR C-34 FOR SHORT BETWEEN CIRCUITS Switch the ignition off (LOCK). Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) Disconnect connector C-34. Inspect for continuity between DLC-2 terminals F and E. Is there continuity?	Yes	Repair or replace the wiring harness between DLC-2 and connector C-34 because the wiring harness is shorted between circuits.
23		No	Go to the next step.
24	INSPECT BETWEEN EPS CONTROL MODULE AND CONNECTOR C-34 FOR SHORT BETWEEN CIRCUITS Inspect for continuity between EPS control module terminals 2A and 2D. Is there continuity?	Yes	Go to the next step.
24		No	Go to Step 26.
25	INSPECT EPS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS Disconnect the EPS control module connector. Is there continuity between EPS control module terminals 2A and 2D (wiring harness side). Is there continuity?	Yes	Repair or replace the wiring harness between the EPS control module and connector C-34 because the wiring harness is shorted between circuits.
25		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.)
26	INSPECT BETWEEN CONNECTOR C-34 AND INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) Switch the ignition ON (engine off). Measure the voltage at instrument cluster terminals B and D. Is the voltage at instrument cluster terminals B and D the same?	Yes	Go to the next step.
26		No	Repair or replace the wiring harness between connector C-11 and connector C-34 because the wiring harness is shorted between circuits.
27	INSPECT BETWEEN START STOP UNIT AND CONNECTOR C-35 FOR SHORT BETWEEN CIRCUITS Switch the ignition off (LOCK). Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) Disconnect connector C-35. Inspect for continuity between start stop unit terminals 2M and 2O. Is there continuity?	Yes	Go to the next step.
27		No	Go to Step 29.
28	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-35 because the wiring harness is shorted between circuits.
28		No	Replace the start stop unit because there is a short between circuits in the start stop unit. (See START STOP UNIT REMOVAL/INSTALLATION.)
29	INSPECT BETWEEN SAS CONTROL MODULE AND CONNECTOR C-35 FOR SHORT BETWEEN CIRCUITS Inspect for continuity between SAS control module terminals 3K and 3L. Is there continuity?	Yes	Go to the next step.
29		No	Go to Step 31.
30	INSPECT SAS CONTROL MODULE FOR SHORT BETWEEN CIRCUITS Disconnect the SAS control module connector. Is there continuity between SAS control module terminals 3K and 3L (wiring harness side). Is there continuity?	Yes	Repair or replace the wiring harness between the SAS control module and connector C-35 because the wiring harness is shorted between circuits.
30		No	Replace the SAS control module because there is a short between circuits 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].)
31	INSPECT BETWEEN AUDIO AMPLIFIER AND CONNECTOR C-35 FOR SHORT BETWEEN CIRCUITS Inspect for continuity between audio amplifier terminals 2L and 2N. Is there continuity?	Yes	Go to the next step.
31		No	Go to Step 33.
32	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-35 because the wiring harness is shorted between circuits.
32		No	Replace the audio amplifier because there is a short between circuits in the audio amplifier. (See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)
33	INSPECT BETWEEN INSTRUMENT CLUSTER AND CONNECTOR C-35 FOR SHORT BETWEEN CIRCUITS Inspect for continuity between instrument cluster terminals B and D. Is there continuity?	Yes	Go to the next step.
33		No	Repair or replace the wiring harness between connector C-34 and connector C-35 because the wiring harness is shorted between circuits.
34	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-35 because the wiring harness is shorted between circuits.
34		No	Replace the instrument cluster because there is a short between circuits in the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
35	INSPECT BETWEEN CONNECTOR C-01 AND FRONT BODY CONTROL MODULE (FBCM) FOR SHORT BETWEEN CIRCUITS Switch the ignition off (LOCK). Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) Connect connector 2 which has front body control module (FBCM) terminals 2K and 2I. Disconnect connector C-01. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) 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-01 and the front body control module (FBCM) because the wiring harness is shorted between circuits.
35		No	Go to the next step.
36	INSPECT BETWEEN TCM AND CONNECTOR C-01 FOR SHORT BETWEEN CIRCUITS Switch the ignition off (LOCK). Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) Inspect for continuity between TCM terminals E and F. Is there continuity?	Yes	Go to the next step.
36		No	Go to Step 38.
37	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.
37		No	Replace the TCM because there is a short between circuits in the TCM. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [FW6A-EL].)
38	INSPECT BETWEEN CONNECTORS C-32 AND C-01 FOR SHORT BETWEEN CIRCUITS Connect connector C-01. Disconnect connector C-32. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) 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-32 and connector C-01 because the wiring harness is shorted between circuits.
38		No	Go to the next step.
39	INSPECT BETWEEN DSC HU/CM AND CONNECTOR C-32 FOR SHORT BETWEEN CIRCUITS Switch the ignition off (LOCK). Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) Inspect for continuity between DSC HU/CM terminals E and D. Is there continuity?	Yes	Go to the next step.
39		No	Go to Step 41.
40	INSPECT DSC HU/CM FOR SHORT BETWEEN CIRCUITS Disconnect the DSC HU/CM connector. Inspect for continuity between DSC HU/CM terminals E and D (wiring harness side). Is there continuity?	Yes	Repair or replace the wiring harness between the DSC HU/CM and connector C-32 because the wiring harness is shorted between circuits.
40		No	Replace the DSC HU/CM because there is a short between circuits in the DSC HU/CM. (See DSC HU/CM REMOVAL/INSTALLATION.)
41	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 connector C-32 because the wiring harness is shorted between circuits.
41		No	Replace the PCM because there is a short between circuits in the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)

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