DETERMINING MALFUNCTIONING PART (HS-CAN) [MULTIPLEX COMMUNICATION SYSTEM (L.H.D. (MZR-CD 2.2))]

DETERMINING MALFUNCTIONING PART (HS-CAN) [MULTIPLEX COMMUNICATION SYSTEM (L.H.D. (MZR-CD 2.2))]SM2445974

id0902k3846700

Caution

• If the malfunctioning part is detected in the communication line, before disconnecting the related connector for inspection, press the connector in the connection direction to verify that there is no looseness or disconnection.

• When disconnecting the connector, verify that there is no damage, deformation, or corrosion of the connector terminals.

1.Verify the CAN system-related module DTCs and the failed module on the M-MDS screen.

2.Refer to Diagnostic Table for Determining Malfunctioning Part and find the area linked from the malfunctioning part.

Note

• A hyphen (-) in the DTC output pattern cell indicates that the DTC may be displayed depending on the malfunction detection conditions. If it is not displayed, the malfunctioning part can be determined by checking only the crosses (×).

• If any of the following DTCs is displayed alone, perform the applicable DTC inspection. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM (L.H.D. (MZR-CD 2.2))].)

― PCM: U0442:00, U0442:01, U0442:02

― Rear vehicle monitoring control module (RH): U0401:68, U0415:68

― SCR control unit: U0401:00, U0423:00

― DSC HU/CM: U2023

― EHPAS control module: U2023

― Keyless control module: U2023

― Instrument cluster: U0100:87, U0401:68, U0401:92, U0414:92, U0415:68, U0415:92, U0422:68, U0452:92, U0515:68, U0515:92, U0533:68, U2005:86

3.Inspect the possible cause and inspection item of the applicable malfunctioning part.

4.Perform the DTC inspection after the repair procedure.

• If any DTC is displayed, return to FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (L.H.D. (MZR-CD 2.2))].

Diagnostic Table for Determining Malfunctioning Part

Cross (×): DisplayedHyphen (-): May or may not be displayed

M-MDS display		DTC display pattern
DTC output module	DTC	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S
PCM (PCM)	U0115:00								×
	U0121:00													×
	U0155:00																	×		×
	U0442:00								-
	U0442:01								-
	U0442:02								-
RVM ^*1 (Rear vehicle monitoring control module)	U0100:00	×
	U0121:00													×
	U0140:00											×
	U0155:00																	×		×
	U0401:68	-
	U0415:68													-
RCM (SAS control module)	U0155																	×		×
SCR CU (SCR control unit)	U0100:00	×		×		×		×
	U0155:00																	×		×
	U029D:00				×	×		×
	U0401:00	-		-		-		-
	U0423:00																	-		-
4×4 (4WD control module)	U0100	×		×		×		×		×
	U0121													×
	U0140											×
	U0155																	×		×
GEM (BCM)	U0100	×		×		×		×		×
GEM (BCM)	U0121 ^*3													×
ABS (DSC HU/CM)	U0100	×		×		×		×		×			×
	U0114										×		×
	U0140											×	×
	U2023	-		-		-		-		-			-
EPS (EHPAS control module	U0100	×		×		×		×		×			×		×
	U0140											×	×		×
	U0155																	×		×
	U2023	-		-		-		-		-			-		-
RKE ^*2 (Keyless control module)	U0100	×		×		×		×		×			×		×		×
	U0140											×	×		×		×
	U0323																			×
	U2023	-		-		-		-		-			-		-		-
IC (Instrument cluster)	U0100:00	×		×		×		×		×			×		×		×
	U0100:87	-		-		-		-		-			-		-		-
	U0114:00										×		×		×		×
	U0121:00													×	×		×
	U0131:00															×	×
	U0140:00											×	×		×		×
	U0151:00						×	×		×			×		×		×
	U0214:00																		×
	U0233:00		×	×		×		×		×			×		×		×
	U0401:68	-		-		-		-		-			-		-		-
	U0401:92	-		-		-		-		-			-		-		-
	U0414:92										-		-		-		-
	U0415:68													-	-		-
	U0415:92													-	-		-
	U0422:68											-	-		-		-
	U0452:92						-	-		-			-		-		-
	U0515:68																		-
	U0515:92																		-
	U0533:68		-	-		-		-		-			-		-		-
	U2005:86	-		-		-		-		-			-		-		-
M-MDS display module		“Fail” display pattern
PCM		×		×		×		×		×			×		×		×
RVM ^*1			×	×		×		×		×			×		×		×
RCM							×	×		×			×		×		×
SCR CU									×	×			×		×		×
4×4											×		×		×		×
GEM												×	×		×		×
ABS														×	×		×
EPS																×	×
RKE ^*2																		×	×
IC																		×		×

*1:With rear vehicle monitoring system

*2:With advanced keyless entry and start system

*3:With ESS (emergency stop signal system)

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between PCM and connector C-37

• Connector C-37 malfunction

• PCM malfunction

System wiring diagram

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Inspection item

• PCM connector

• Connector C-37

• Wiring harness between PCM terminal 2AD and connector C-37

• Wiring harness between PCM terminal 2AH and connector C-37

• PCM

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between rear vehicle monitoring control module (RH) and connector C-37

• Connector C-37 malfunction

• Rear vehicle monitoring control module (RH) malfunction

System wiring diagram

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Inspection item

• Rear vehicle monitoring control module (RH) connector

• Connector C-37

• Wiring harness between Rear vehicle monitoring control module (RH) terminal L and connector C-37

• Wiring harness between Rear vehicle monitoring control module (RH) terminal I and connector C-37

• Rear vehicle monitoring control module (RH)

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between connector C-37 and branch A

• Connector C-37 malfunction

System wiring diagram

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Inspection item

• Connector C-37

• Wiring harness between connector C-37 and branch A

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between NOx sensor control module and branch A

• NOx sensor control module malfunction

System wiring diagram

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Inspection item

• NOx sensor control module connector

• Wiring harness between NOx sensor control module terminal 4 and branch A

• Wiring harness between NOx sensor control module terminal 3 and branch A

• NOx sensor control module

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between branch A and branch B

System wiring diagram

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Inspection item

• Wiring harness between branch A and branch B

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between SAS control module and branch B

• SAS control module malfunction

System wiring diagram

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Inspection item

• SAS control module connector

• Wiring harness between SAS control module terminal 2E and branch B

• Wiring harness between SAS control module terminal 2F and branch B

• SAS control module

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness branch B and branch C

System wiring diagram

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Inspection item

• Wiring harness between branch B and branch C

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness SCR control unit and branch C

• SCR control unit malfunction

System wiring diagram

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Inspection item

• SCR control unit connector

• Wiring harness between SCR control unit terminal 61 and branch C

• Wiring harness between SCR control unit terminal 62 and branch C

• SCR control unit

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness branch C and branch D

System wiring diagram

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Inspection item

• Wiring harness between branch C and branch D

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between 4WD control module and branch D

• 4WD control module malfunction

System wiring diagram

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Inspection item

• 4WD control module connector

• Wiring harness between 4WD control module terminal G and branch D

• Wiring harness between 4WD control module terminal H and branch D

• 4WD control module

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between BCM and branch D

• BCM malfunction

System wiring diagram

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Inspection item

• BCM connector

• Wiring harness between BCM terminal 5I and branch D

• Wiring harness between BCM terminal 5L and branch D

• BCM

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between branch D and BCM

• Open circuit in wiring harness between BCM and branch E

• BCM malfunction

System wiring diagram

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Inspection item

• BCM connector

• Wiring harness between BCM terminal 5C and branch D

• Wiring harness between BCM terminal 5F and branch D

• Wiring harness between BCM terminal 1F and branch E

• Wiring harness between BCM terminal 1D and branch E

• BCM

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between DSC HU/CM and branch E

• DSC HU/CM malfunction

System wiring diagram

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Inspection item

• DSC HU/CM connector

• Wiring harness between DSC HU/CM terminal X and branch E

• Wiring harness between DSC HU/CM terminal W and branch E

• DSC HU/CM

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between branch E and branch F

System wiring diagram

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Inspection item

• Wiring harness between branch E and branch F

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between EHPAS control module and branch F

• EHPAS control module malfunction

System wiring diagram

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Inspection item

• EHPAS control module connector

• Wiring harness between EHPAS control module terminal 2D and branch F

• Wiring harness between EHPAS control module terminal 2B and branch F

• EHPAS control module

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between branch F and connector C-22

• Open circuit in wiring harness between connector C-22 and branch G

• Connector C-22 malfunction

System wiring diagram

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Inspection item

• Connector C-22 connector

• Wiring harness between branch F and connector C-22

• Wiring harness between connector C-22 and branch G

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between branch G and branch H

System wiring diagram

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Inspection item

• Wiring harness between branch G and branch H

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between branch H and keyless control module

• Keyless control module malfunction

System wiring diagram

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Inspection item

• Keyless control module connector

• Wiring harness between keyless control module terminal 3X and branch H

• Wiring harness between keyless control module terminal 3W and branch H

• Keyless control module

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between branch H and instrument cluster

• Instrument cluster malfunction

System wiring diagram

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Inspection item

• Instrument cluster connector

• Wiring harness between instrument cluster terminal 2R and branch H

• Wiring harness between instrument cluster terminal 2T and branch H

• Instrument cluster