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

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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. (MZR-CD 2.2))].)
―  EPS control module: U0300:00, U0401:00, U2100:00, U3000:85
―  DSC HU/CM: U0401:00, U0401:68, U0402:00
―  Rear vehicle monitoring control module (RH): U0401:68, U0415:68
―  BCM: U0401:68
―  AFS control module: U0401:00, U0422:00
―  Instrument cluster: U0100:87, U0401:68, U0401:92, U0415:68, U0415:92, U0425:68, U0452:92, U0483:68, U0483:92, U0515:68, U0515:92, U0533:68, U2005:86

3.  Refer to the matching tandem diagnostic results (A to P) 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. (MZR-CD 2.2))].


DTC Output Pattern and Malfunctioning Part

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

M-MDS display

DTC display pattern

DTC output module

DTC
PCM
(PCM)
U0121:00
 
 
 
×
 
 
 
 
 
 
 
 
 
 
 
 
U0155:00
 
 
 
 
 
 
 
 
 
 
 
 
 
×
 
×
EPS
(EPS control module)
U0100:00
×
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U0300:00
-
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U0401:00
-
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U2100:00
-
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U3000:85
-
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ABS
(DSC HU/CM)
U0100:00
×
 
×
 
 
 
 
 
 
 
 
 
 
 
 
 
U0140:00
 
 
 
 
 
 
 
 
 
 
×
 
 
 
 
 
U0155:00
 
 
 
 
 
 
 
 
 
 
 
 
 
×
 
×
U0214:00
 
 
 
 
 
 
×
 
 
 
 
 
 
 
 
 
U0401:00
-
 
-
 
 
 
 
 
 
 
 
 
 
 
 
 
U0401:68
-
 
-
 
 
 
 
 
 
 
 
 
 
 
 
 
U0402:00
-
 
-
 
 
 
 
 
 
 
 
 
 
 
 
 
FFH*1
(Water heater unit)
U0100:00
×
 
×
 
 
 
 
 
 
 
 
 
 
 
 
 
U0140:00
 
 
 
 
 
 
 
 
 
 
×
 
 
 
 
 
U0155:00
 
 
 
 
 
 
 
 
 
 
 
 
 
×
 
×
RKE*2
(Keyless control module)
U0100:00
×
 
×
 
 
×
 
 
 
 
 
 
 
 
 
 
U0121:00
 
 
 
×
 
×
 
 
 
 
 
 
 
 
 
 
RVM*3
(Rear vehicle monitoring control module (RH))
U0100:00
×
 
×
 
 
×
 
×
 
 
 
 
 
 
 
 
U0121:00
 
 
 
×
 
×
 
×
 
 
 
 
 
 
 
 
U0140:00
 
 
 
 
 
 
 
 
 
 
×
 
 
 
 
 
U0155:00
 
 
 
 
 
 
 
 
 
 
 
 
 
×
 
×
U0401:68
-
 
-
 
 
-
 
-
 
 
 
 
 
 
 
 
U0415:68
 
 
 
-
 
-
 
-
 
 
 
 
 
 
 
 
BCM/GEM
(BCM)
U0100:00
×
 
×
 
 
×
 
×
 
×
 
 
 
 
 
 
U0121:00
 
 
 
×
 
×
 
×
 
×
 
 
 
 
 
 
U0151:00
 
 
 
 
 
 
 
 
 
 
 
 
×
 
 
 
U0214:00
 
 
 
 
 
 
×
×
 
×
 
 
 
 
 
 
U0401:68
-
 
-
 
 
-
 
-
 
-
 
 
 
 
 
 
RCM
(SAS control module)
U0155:00
 
 
 
 
 
 
 
 
 
 
 
 
 
×
 
×
AFS*4
(AFS control module)
U0100:00
×
 
×
 
 
×
 
×
 
×
 
×
 
 
 
 
U0140:00
 
 
 
 
 
 
 
 
 
 
×
×
 
 
 
 
U0155:00
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
×
U0401:00
-
 
-
 
 
-
 
-
 
-
 
-
 
 
 
 
U0422:00
 
 
 
 
 
 
 
 
 
 
-
-
 
 
 
 
IC
(Instrument cluster)
U0100:00
×
 
×
 
 
×
 
×
 
×
 
×
 
 
 
 
U0100:87
-
 
-
 
 
-
 
-
 
-
 
-
 
 
 
 
U0121:00
 
 
 
×
 
×
 
×
 
×
 
×
 
 
 
 
U0140:00
 
 
 
 
 
 
 
 
 
 
×
×
 
 
 
 
U0151:00
 
 
 
 
 
 
 
 
 
 
 
 
×
 
 
 
U0166:00
 
 
 
 
×
×
 
×
 
×
 
×
 
 
 
 
U0182:00
 
 
 
 
 
 
 
 
 
 
 
 
 
 
×
 
U0214:00
 
 
 
 
 
 
×
×
 
×
 
×
 
 
 
 
U0232:00
 
 
 
 
 
 
 
 
×
×
 
×
 
 
 
 
U0401:68
-
 
-
 
 
-
 
-
 
-
 
-
 
 
 
 
U0401:92
-
 
-
 
 
-
 
-
 
-
 
-
 
 
 
 
U0415:68
 
 
 
-
 
-
 
-
 
-
 
-
 
 
 
 
U0415:92
 
 
 
-
 
-
 
-
 
-
 
-
 
 
 
 
U0425:68
 
 
 
 
-
-
 
-
 
-
 
-
 
 
 
 
U0452:92
 
 
 
 
 
 
 
 
 
 
 
 
-
 
 
 
U0483:68
 
 
 
 
 
 
 
 
 
 
 
 
 
 
-
 
U0483:92
 
 
 
 
 
 
 
 
 
 
 
 
 
 
-
 
U0515:68
 
 
 
 
 
 
-
-
 
-
 
-
 
 
 
 
U0515:92
 
 
 
 
 
 
-
-
 
-
 
-
 
 
 
 
U0533:68
 
 
 
 
 
 
 
 
-
-
 
-
 
 
 
 
U2005:86
-
 
-
 
 
-
 
-
 
-
 
-
 
 
 
 
M-MDS display module
“Fail” display pattern
PCM
×
 
×
 
 
×
 
×
 
×
 
×
 
 
 
 
EPS
 
×
×
 
 
×
 
×
 
×
 
×
 
 
 
 
ABS
 
 
 
×
 
×
 
×
 
×
 
×
 
 
 
 
FFH*1
 
 
 
 
×
×
 
×
 
×
 
×
 
 
 
 
RKE*2
 
 
 
 
 
 
×
×
 
×
 
×
 
 
 
 
RVM*3
 
 
 
 
 
 
 
 
×
×
 
×
 
 
 
 
BCM/GEM
 
 
 
 
 
 
 
 
 
 
×
×
 
 
 
 
RCM
 
 
 
 
 
 
 
 
 
 
 
 
×
 
 
 
AFS*4
 
 
 
 
 
 
 
 
 
 
 
 
 
×
×
 
IC
 
 
 
 
 
 
 
 
 
 
 
 
 
×
 
×
Item
Diagnostic result
Possible cause and inspection item
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Reference page
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P

*1  :With water heater system
*2  :With advanced keyless entry and push button start system
*3  :With rear vehicle monitoring system
*4  :With AFS (adaptive front lighting system)

A


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

am6zzw00005973


Inspection item

•  PCM connector
•  Wiring harness between PCM terminal 2AD and branch A
•  Wiring harness between PCM terminal 2AH and branch A
•  PCM


B


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between EPS control module and branch A
•  EPS control module malfunction


System wiring diagram

am6zzw00005974


Inspection item

•  EPS control module connector
•  Wiring harness between EPS control module terminal 2B and branch A
•  Wiring harness between EPS control module terminal 2C and branch A
•  EPS control module


C


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between branch A and connector C-63 (with water heater system)
•  Open circuit in wiring harness between connector C-63 and branch B (with water heater system)
•  Open circuit in wiring harness between branch A and branch B (without water heater system)
•  Connector C-63 malfunction (with water heater system)


System wiring diagram

am6zzw00005975


Inspection item

•  Connector C-63 (with water heater system)
•  Wiring harness between branch A and connector C-63 (with water heater system)
•  Wiring harness between connector C-63 and branch B (with water heater system)
•  Wiring harness between branch A and branch B (without water heater system)


D


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between DSC HU/CM and branch B
•  DSC HU/CM malfunction


System wiring diagram

am6zzw00005976


Inspection item

•  DSC HU/CM connector
•  Wiring harness between DSC HU/CM terminal E and branch B
•  Wiring harness between DSC HU/CM terminal D and branch B
•  DSC HU/CM


E


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between water heater unit and branch B
•  Water heater unit malfunction


System wiring diagram

am6zzw00005977


Inspection item

•  Water heater unit connector
•  Wiring harness between water heater unit terminal 2C and branch B
•  Wiring harness between water heater unit terminal 2E and branch B
•  Water heater unit


F


With advanced keyless entry and push button start system

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between branch B and connector C-06
•  Open circuit in wiring harness connector C-06 and connector C-33
•  Connector C-06 malfunction
•  Connector C-33 malfunction

System wiring diagram

am6zzw00005978
Inspection item
•  Connector C-06
•  Connector C-33
•  Wiring harness between branch B and connector C-06
•  Wiring harness between connector C-06 and connector C-33


Without advanced keyless entry and push button start system

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between branch B and connector C-06
•  Open circuit in wiring harness connector C-06 and connector C-27
•  Open circuit in wiring harness connector C-27 and branch C
•  Connector C-06 malfunction
•  Connector C-27 malfunction

System wiring diagram

am6zzw00005981
Inspection item
•  Connector C-06
•  Connector C-27
•  Wiring harness between branch B and connector C-06
•  Wiring harness between connector C-06 and connector C-27
•  Wiring harness between connector C-27 and branch C


Without advanced keyless entry and push button start system and rear vehicle monitoring system

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between branch B and connector C-06
•  Open circuit in wiring harness between connector C-06 and BCM
•  Connector C-06 malfunction

System wiring diagram

am6zzw00005985
Inspection item
•  BCM connector
•  Connector C-06
•  Wiring harness between branch B and connector C-06
•  Wiring harness between connector C-06 and BCM terminal 6D
•  Wiring harness between connector C-06 and BCM terminal 6B


G


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness keyless control module and connector C-33
•  Connector C-33 malfunction
•  Keyless control module malfunction


System wiring diagram

am6zzw00005979


Inspection item

•  Keyless control module connector
•  Connector C-33
•  Wiring harness between keyless control module terminal 2G and connector C-33
•  Wiring harness between keyless control module terminal 2I and connector C-33
•  Keyless control module


H


With rear vehicle monitoring system

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between connector C-33 and connector C-27
•  Open circuit in wiring harness between connector C-27 and branch C
•  Connector C-33 malfunction
•  Connector C-27 malfunction

System wiring diagram

am6zzw00005980
Inspection item
•  Connector C-33
•  Connector C-27
•  Wiring harness between connector C-33 and connector C-27
•  Wiring harness between connector C-27 and branch C


Without rear vehicle monitoring system

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between connector C-33 and BCM
•  Connector C-33 malfunction

System wiring diagram

am6zzw00005984
Inspection item
•  BCM connector
•  Connector C-33
•  Wiring harness between connector C-33 and BCM terminal 6D
•  Wiring harness between connector C-33 and BCM terminal 6B


I


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness rear vehicle monitoring control module (RH) and branch C
•  Rear vehicle monitoring control module (RH) malfunction


System wiring diagram

am6zzw00005982


Inspection item

•  Rear vehicle monitoring control module (RH) connector
•  Wiring harness between rear vehicle monitoring control module (RH) terminal L and branch C
•  Wiring harness between rear vehicle monitoring control module (RH) terminal I and branch C
•  Rear vehicle monitoring control module (RH)


J


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between branch C and connector C-27
•  Open circuit in wiring harness between connector C-27 and BCM
•  Connector C-27 malfunction


System wiring diagram

am6zzw00005983


Inspection item

•  BCM connector
•  Connector C-27
•  Wiring harness between branch C and connector C-27
•  Wiring harness between connector C-27 and BCM terminal 6D
•  Wiring harness between connector C-27 and BCM terminal 6B


K


Possible cause

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


System wiring diagram

am6zzw00005986


Inspection item

•  BCM


L


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between BCM and connector C-18
•  Connector C-18 malfunction


System wiring diagram

am6zzw00005987


Inspection item

•  BCM connector
•  Connector C-18
•  Wiring harness between BCM terminal 3S and Connector C-18
•  Wiring harness between BCM terminal 3P and Connector C-18


M


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between SAS control module and connector C-18
•  Connector C-18 malfunction
•  SAS control module malfunction


System wiring diagram

am6zzw00005988


Inspection item

•  SAS control module connector
•  Connector C-18
•  Wiring harness between SAS control module terminal 3C and connector C-18
•  Wiring harness between SAS control module terminal 3D and connector C-18
•  SAS control module


N


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between connector C-18 and connector C-19
•  Connector C-18 malfunction
•  Connector C-19 malfunction


System wiring diagram

am6zzw00005989


Inspection item

•  Connector C-18
•  Connector C-19
•  Wiring harness between connector C-18 and connector C-19


O


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between AFS control module and connector C-19
•  Connector C-19 malfunction
•  AFS control module malfunction


System wiring diagram

am6zzw00005990


Inspection item

•  AFS control module connector
•  Connector C-19
•  Wiring harness between AFS control module terminal B and Connector C-19
•  Wiring harness between AFS control module terminal A and Connector C-19
•  AFS control module


P


With AFS system

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between connector C-19 and instrument cluster
•  Connector C-19 malfunction
•  Instrument cluster malfunction

System wiring diagram

am6zzw00005991
Inspection item
•  Instrument cluster connector
•  Connector C-19
•  Wiring harness between instrument cluster terminal 2X and Connector C-19
•  Wiring harness between instrument cluster terminal 2W and Connector C-19
•  Instrument cluster


Without AFS system

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between connector C-18 and instrument cluster
•  Connector C-18 malfunction
•  Instrument cluster malfunction

System wiring diagram

am6zzw00005992
Inspection item
•  Connector C-18
•  Instrument cluster connector
•  Wiring harness between instrument cluster terminal 2X and Connector C-18
•  Wiring harness between instrument cluster terminal 2W and Connector C-18
•  Instrument cluster