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

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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 using the (M-MDS).

2. Look for a DTC display pattern and failed module display pattern in tandem which match.

Note

• A hyphen (-) in the DTC output pattern table indicates that the DTC may be displayed depending on the malfunction detection conditions. If only an (×) is indicated, it means the DTC will not be displayed.

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

― DSC HU/CM: U0401:68

― BCM: U0415:68

― Keyless control module: U0401:68

― EPS control module: U0401:00

― Instrument cluster: U0100:87, U0401:68, U0401:92, U0415:92, U0420:92, U0452:68, U0452:92, U0515:68

3. Refer to the matching tandem diagnostic results (A to J) and inspect the possible cause and inspection item.

4. Perform the DTC inspection after the repair procedure.

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

Diagnostic Table for Determining Malfunctioning Part

Cross (×): Displayed

Hyphen (-): May or may not be displayed

M-MDS display		DTC display pattern
DTC output module	DTC	DTC display pattern
PCM (PCM)^*1	U0121:00		×
	U0140:00
	U0151:00				×
	U0155:00										×
PCM (PCM)^*2	U0121:00		×
	U0140:00
	U0155										×
	U0416									×
	U0423										-
PCM (PCM)^*3	U0121:00		×
	U0122:86		×
	U0122:87		×
	U0155:00		×
	U0167:00										×
	U0300:87							×^*6			×^*7
ABS (ABS HU/CM)^*4	U0100:00	×
	U0155:00										×
	U2101:00										-
ABS (DSC HU/CM)^*5	U0100:00	×
	U0126:00									×
	U0155:00										×
	U0401:68	-
	U2101:00										-
RCM (SAS control module)	U0155:00										×
BCM/GEM (BCM)	U0100:00	×		×		×
	U0121:00		×	×		×
	U0415:68		-	-		-
RKE (Keyless control module)^*6	U0028:87						×
	U0100:00	×		×		×	×
	U0401:68	-		-		-	-
EPS (EPS control module)	U0100:00	×		×		×	×		×
EPS (EPS control module)	U0401:00	-		-		-	-		-
IC (Instrument cluster)	U0100:00	×		×		×	×		×
	U0100:87	-		-		-	-		-
	U0121:00		×	×		×	×		×
	U0131:00									×
	U0140:00						×		×
	U0151:00				×	×	×		×
	U0214:00							×	×
	U0401:68	-		-		-	-		-
	U0401:92	-		-		-	-		-
	U0415:92		-	-		-	-		-
	U0420:92									-
	U0452:68				-	-	-		-
	U0452:92				-	-	-		-
	U0515:68							-	-
M-MDS display module		“Fail” display pattern
PCM		×		×		×	×		×
ABS			×	×		×	×		×
RCM					×	×	×		×
BCM/GEM							×		×
RKE^*6								×	×
EPS										×
IC											×
Item		Diagnostic result
Possible cause and inspection item		A	B	C	D	E	F	G	H	I	J
Reference page		A	B	C	D	E	F	G	H	I	J

*1 :ZJ, ZY

*2 :MZ-CD 1.4 DI Turbo

*3 :MZ-CD 1.6 (Y6)

*4 :With ABS

*5 :With DSC

*6 :With advanced keyless entry and start system

*7 :With keyless entry system

Possible cause

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

• Open circuit in wiring harness between PCM and branch A

• PCM malfunction

System wiring diagram

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Inspection item

ZJ, ZY

• PCM connector

• Wiring harness between PCM terminal 1AE and branch A

• Wiring harness between PCM terminal 1AI and branch A

• PCM

MZ-CD 1.4 DI Turbo

• PCM connector

• Wiring harness between PCM terminal 1A and branch A

• Wiring harness between PCM terminal 1B and branch A

• PCM

MZ-CD 1.6 (Y6)

• PCM connector

• Wiring harness between PCM terminal 301 and branch A

• Wiring harness between PCM terminal 309 and branch A

• PCM

Possible cause

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

• Open circuit in wiring harness between ABS HU/CM and branch A

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

• ABS HU/CM malfunction

• DSC HU/CM malfunction

System wiring diagram

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Inspection item

• ABS HU/CM connector

• DSC HU/CM connector

• Wiring harness between ABS HU/CM terminal H and branch A

• Wiring harness between ABS HU/CM terminal L and branch A

• Wiring harness between DSC HU/CM terminal M and branch A

• Wiring harness between DSC HU/CM terminal J and branch A

• ABS HU/CM

• DSC HU/CM

Possible cause

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

• Open circuit in wiring harness between branch A and connector C-03

• Open circuit in wiring harness between connector C-03 and branch B

• Connector C-03 malfunction

System wiring diagram

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Inspection item

• Connector C-03

• Wiring harness between branch A and connector C-03

• Wiring harness between connector C-03 and branch B

Possible cause

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

• Open circuit in wiring harness 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 3C and branch B

• Wiring harness between SAS control module terminal 3D and branch B

• SAS control module

Possible cause

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

• Open circuit in wiring harness between BCM and branch B

System wiring diagram

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Inspection item

• BCM connector

• Wiring harness between BCM terminal 7K and branch B

• Wiring harness between BCM terminal 7V and branch B

Possible cause

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

• Open circuit in wiring harness BCM and branch C

• BCM malfunction

System wiring diagram

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Inspection item

• BCM connector

• Wiring harness between BCM terminal 6X and branch C

• Wiring harness between BCM terminal 6V and branch C

• BCM

Possible cause

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

• Open circuit in wiring harness keyless control module and branch C

• Keyless control module malfunction

System wiring diagram

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Inspection item

• Keyless control module connector

• Wiring harness between keyless control module terminal 2G and branch C

• Wiring harness between keyless control module terminal 2I and branch C

• Keyless control module

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 EPS control module and branch D

• EPS control module malfunction

System wiring diagram

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Inspection item

• EPS control module connector

• Wiring harness between EPS control module terminal 1G and branch D

• Wiring harness between EPS control module terminal 1H and branch D

• EPS control module

Possible cause

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

• Open circuit in wiring harness instrument cluster and branch D

• Instrument cluster malfunction

System wiring diagram

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Inspection item

• Instrument cluster connector

• Wiring harness between instrument cluster terminal 2B and branch D

• Wiring harness between instrument cluster terminal 2D and branch D

• Instrument cluster