DETERMINING SHORT TO GROUND LOCATION (HS-CAN) [MZR 1.6 (R.H.D.)]

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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 [MZR 1.6 (R.H.D.)].)

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 [MZR 1.6].) •  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 7.
		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 CONNECTOR C-32 AND FRONT BODY CONTROL MODULE (FBCM) •  Disconnect connector C-32. •  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 connector C-32 and front body control module (FBCM) because the wiring harness is shorted to ground.
		No	Go to the next step.
4	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 the connector C-32 and connector C-60 because the wiring harness is shorted to ground.
		No	Go to the next step.
5	INSPECT FOR SHORT TO GROUND BETWEEN ABS HU/CM AND CONNECTOR C-60 •  Inspect for continuity at the following terminals: ―  Between ABS HU/CM terminal H and body ground ―  Between ABS HU/CM terminal L and body ground •  Is there continuity?	Yes	Go to the next step.
		No	Go to Step 20.
6	INSPECT CAN LINE IN ABS HU/CM FOR SHORT TO GROUND •  Disconnect the ABS HU/CM connector. •  Inspect for continuity at the following terminals: ―  Between ABS HU/CM terminal H (wiring harness side) and body ground ―  Between ABS HU/CM terminal L (wiring harness side) and body ground •  Is there continuity?	Yes	Repair or replace the wiring harness between the ABS HU/CM and connector C-60 because the wiring harness is shorted to ground.
		No	Replace the ABS HU/CM because there is a short to ground in the ABS HU/CM. (See ABS HU/CM REMOVAL/INSTALLATION.)
7	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.
8	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 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.
9	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-12 AND CONNECTOR C-33 •  Disconnect connector C-33. •  Connect connector C-12. •  Connect connector C-03. •  Connect connector 2 which has front body control module (FBCM) terminals 2P and 2N. •  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	Repair or replace the wiring harness between connector C-12 and connector C-33 because the wiring harness is shorted to ground.
		No	Go to the next step.
10	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-33 AND DLC-2 •  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.
11	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 13.
12	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.)
13	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 15.
14	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.)
15	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.
16	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 18.
17	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.)
18	INSPECT FOR SHORT TO GROUND BETWEEN CONNECTOR C-09 AND CONNECTOR C-34 •  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.
19	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.)
20	INSPECT CAN LINE IN PCM FOR SHORT TO GROUND •  Disconnect the PCM connector. •  Inspect for continuity at the following terminals: ―  Between PCM terminal 1BE (wiring harness side) and body ground ―  Between PCM terminal 1AZ (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 [MZR 1.6].)