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 “דis 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.)].)
―  TCM (AW6A-EL, AW6AX-EL): U0415
―  TCM (AY6A-EL, AY6AX-EL): U0415:00
―  BCM: U0401
―  Position memory control module: U0431:68
―  Keyless control module: U2023
―  Instrument cluster: U2510

3.  Refer to the matching tandem diagnostic results (A to Q) 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
PCM
(PCM*1)
U0101
 
×
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U0129
 
 
 
×
 
 
 
 
 
 
 
 
 
 
 
 
 
U0155
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
×
PCM
(PCM*2)
U0101:00
 
×
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U0140:00
 
 
 
 
 
×
 
 
 
 
 
 
 
 
 
 
 
TCM
(TCM*3)
U0100
×
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U0121
 
 
 
×
 
 
 
 
 
 
 
 
 
 
 
 
 
U0140
 
 
 
 
 
×
 
 
 
 
 
 
 
 
 
 
 
U0415
 
 
 
-
 
 
 
 
 
 
 
 
 
 
 
 
 
TCM
(TCM*4)
U0100:00
×
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U0121:00
 
 
 
×
 
 
 
 
 
 
 
 
 
 
 
 
 
U0155:00
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
×
U0415:00
 
 
 
-
 
 
 
 
 
 
 
 
 
 
 
 
 
ABS
(DSC/RSC HU/CM)
U0100
×
 
×
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U0140
 
 
 
 
 
×
 
 
 
 
 
 
 
 
 
 
 
U0155
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
×
GEM
(BCM)
U0100
×
 
×
 
×
 
 
 
 
 
 
 
 
 
 
 
 
U0101
 
×
×
 
×
 
 
 
 
 
 
 
 
 
 
 
 
U0121
 
 
 
×
×
 
 
 
 
 
 
 
 
 
 
 
 
U0401
-
 
-
 
-
 
 
 
 
 
 
 
 
 
 
 
 
4×4*5
(4WD control module)
U0100
×
 
×
 
×
 
 
 
 
 
 
 
 
 
 
 
 
U0101
 
×
×
 
×
 
 
 
 
 
 
 
 
 
 
 
 
U0121
 
 
 
×
×
 
 
 
 
 
 
 
 
 
 
 
 
U0155
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
×
RKE*6
(Keyless control module)
U0100
×
 
×
 
×
 
 
×
 
 
 
 
 
 
 
 
 
U0140
 
 
 
 
 
×
 
×
 
 
 
 
 
 
 
 
 
U0323
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
×
U2023
-
 
-
 
-
 
 
-
 
 
 
 
 
 
 
 
 
LTM*7
(PLG control module)
U0100
×
 
×
 
×
 
 
×
 
×
 
 
 
 
 
 
 
U0101
 
×
×
 
×
 
 
×
 
×
 
 
 
 
 
 
 
U0140
 
 
 
 
 
×
 
×
 
×
 
 
 
 
 
 
 
U0155
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
×
U0214
 
 
 
 
 
 
 
 
×
×
 
 
 
 
 
 
 
DSM*8
(Position memory control module)
U0100:00
×
 
×
 
×
 
 
×
 
×
 
×
 
 
 
 
 
U0101:00
 
×
×
 
×
 
 
×
 
×
 
×
 
 
 
 
 
U0121:00
 
 
 
×
×
 
 
×
 
×
 
×
 
 
 
 
 
U0140:00
 
 
 
 
 
×
 
×
 
×
 
×
 
 
 
 
 
U0155:00
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
×
U0431:68
 
 
 
 
 
-
 
-
 
-
 
-
 
 
 
 
 
RCM
(SAS control module)
U0155
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
×
VSM*9
(Theft-deterrent control module)
U0100:00
×
 
×
 
×
 
 
×
 
×
 
×
 
×
 
 
 
U0140:00
 
 
 
 
 
×
 
×
 
×
 
×
 
×
 
 
 
IC
(Instrument cluster)
U0100
×
 
×
 
×
 
 
×
 
×
 
×
 
×
 
 
 
U0101
 
×
×
 
×
 
 
×
 
×
 
×
 
×
 
 
 
U0114
 
 
 
 
 
 
×
×
 
×
 
×
 
×
 
 
 
U0121
 
 
 
×
×
 
 
×
 
×
 
×
 
×
 
 
 
U0140
 
 
 
 
 
×
 
×
 
×
 
×
 
×
 
 
 
U0151
 
 
 
 
 
 
 
 
 
 
 
 
 
 
×
 
 
U0214
 
 
 
 
 
 
 
 
×
×
 
×
 
×
 
 
 
U2510
-
 
-
 
-
 
 
-
 
-
 
-
 
-
 
 
 
M-MDS display module
“Fail” display pattern
PCM
×
 
×
 
×
 
 
×
 
×
 
×
 
×
 
 
 
TCM
 
×
×
 
×
 
 
×
 
×
 
×
 
×
 
 
 
ABS
 
 
 
×
×
 
 
×
 
×
 
×
 
×
 
 
 
GEM
 
 
 
 
 
×
 
×
 
×
 
×
 
×
 
 
 
4×45
 
 
 
 
 
 
×
×
 
×
 
×
 
×
 
 
 
RKE*6
 
 
 
 
 
 
 
 
×
×
 
×
 
×
 
 
 
LTM*7
 
 
 
 
 
 
 
 
 
 
×
×
 
×
 
 
 
DSM*8
 
 
 
 
 
 
 
 
 
 
 
 
×
×
 
 
 
RCM
 
 
 
 
 
 
 
 
 
 
 
 
 
 
×
 
 
VSM*9
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
×
 
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
Q
Reference page
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q

*1  :PCM connector (2 types)
*2  :PCM connector (3 types)
*3  :AW6A-EL, AW6AX-EL
*4  :AY6A-EL, AY6AX-EL
*5  :With 4WD
*6  :With advanced keyless entry and start system
*7  :With PLG system
*8  :With position memory control system
*9  :With theft-deterrent 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

ac9wzw00001804


Inspection item

•  PCM connector
•  Wiring harness between PCM (PCM connector (2 types)) terminal 1BL and branch A
•  Wiring harness between PCM (PCM connector (2 types)) terminal 1BG and branch A
•  Wiring harness between PCM (PCM connector (3 types)) terminal 1AH and branch A
•  Wiring harness between PCM (PCM connector (3 types)) terminal 1AL and branch A
•  PCM


B


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between TCM and connector C-03
•  Open circuit in wiring harness between connector C-03 and branch A
•  Connector C-03 malfunction
•  TCM malfunction


System wiring diagram

ac9wzw00001805


Inspection item

•  TCM connector
•  Connector C-03 connector
•  Wiring harness between TCM terminal A14 and connector C-03
•  Wiring harness between TCM terminal A6 and connector C-03
•  Wiring harness between connector C-03 and branch A
•  TCM


C


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between branch A and connector C-36
•  Connector C-36 malfunction


System wiring diagram

ac9wzw00001806


Inspection item

•  Connector C-36
•  Wiring harness between branch A and connector C-36


D


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between DSC/RSC HU/CM and connector C-36
•  Connector C-36 malfunction
•  DSC/RSC HU/CM malfunction


System wiring diagram

ac9wzw00001807


Inspection item

•  DSC/RSC HU/CM connector
•  Connector C-36 connector
•  Wiring harness between DSC/RSC HU/CM terminal Y and connector C-36
•  Wiring harness between DSC/RSC HU/CM terminal V and connector C-36
•  DSC/RSC HU/CM


E


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between BCM and connector C-36
•  Connector C-36 malfunction
•  BCM malfunction


System wiring diagram

ac9wzw00001808


Inspection item

•  BCM connector
•  Connector C-36 connector
•  Wiring harness between BCM terminal 1L and connector C-36
•  Wiring harness between BCM terminal 1J and connector C-36
•  Inspect for continuity between the following terminals:
―  BCM terminal 1L and terminal 3AA
―  BCM terminal 1J and terminal 3Z


F


Possible cause

•  BCM malfunction


System wiring diagram

ac9wzw00001809


Inspection item

•  BCM


G


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness 4WD control module and BCM
•  4WD control module malfunction
•  BCM malfunction


System wiring diagram

ac9wzw00001810


Inspection item

•  BCM connector
•  4WD control module connector
•  Wiring harness between 4WD control module terminal G and BCM terminal 6J
•  Wiring harness between 4WD control module terminal H and BCM terminal 6H
•  4WD control module
•  Inspect for continuity between the following terminals:
―  BCM terminal 6J and terminal 3AA
―  BCM terminal 6H and terminal 3Z


H


Possible cause

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


System wiring diagram

ac9wzw00001811


Inspection item

•  Inspect for continuity between the following terminals:
―  BCM terminal 6J and terminal 3AA
―  BCM terminal 6H and terminal 3Z


I


Possible cause

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


System wiring diagram

ac9wzw00001812


Inspection item

•  BCM connector
•  Keyless control module connector
•  Wiring harness between keyless control module terminal 3X and BCM terminal 3AD
•  Wiring harness between keyless control module terminal 3W and BCM terminal 3AC
•  Keyless control module
•  Inspect for continuity between the following terminals:
―  BCM terminal 3AD and terminal 3AA
―  BCM terminal 3AC and terminal 3Z


J


With PLG system

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

System wiring diagram

ac9wzw00001813
Inspection item
•  BCM connector
•  Wiring harness between BCM terminal 6I and branch B
•  Wiring harness between BCM terminal 6G and branch B
•  Inspect for continuity between the following terminals:
―  BCM terminal 6I and terminal 3AA
―  BCM terminal 6G and terminal 3Z


Without PLG system

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

System wiring diagram

ac9wzw00001814
Inspection item
•  BCM connector
•  Wiring harness between BCM terminal 6I and branch B
•  Wiring harness between BCM terminal 6G and branch B
•  Inspect for continuity between the following terminals:
―  BCM terminal 6I and terminal 3AA
―  BCM terminal 6G and terminal 3Z


K


Possible cause

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


System wiring diagram

ac9wzw00001815


Inspection item

•  PLG control module connector
•  Wiring harness between PLG control module terminal 3V and branch B
•  Wiring harness between PLG control module terminal 3U and branch B
•  PLG control module


L


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness branch B and connector C-21
•  Open circuit in wiring harness connector C-21 and connector C-21
•  Open circuit in wiring harness connector C-21 and branch C
•  Connector C-21 malfunction


System wiring diagram

ac9wzw00001816


Inspection item

•  Connector C-21 connector
•  Wiring harness between branch B and connector C-21
•  Wiring harness between connector C-21 and connector C-21
•  Wiring harness between connector C-21 and branch C


M


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between position memory control module and connector C-48
•  Open circuit in wiring harness between connector C-48 and branch C
•  Connector C-48 malfunction
•  Position memory control module malfunction


System wiring diagram

ac9wzw00001817


Inspection item

•  Position memory control module connector
•  Connector C-48 connector
•  Wiring harness between position memory control module terminal 1I and connector C-48
•  Wiring harness between position memory control module terminal 1J and connector C-48
•  Wiring harness between connector C-48 and branch C
•  Position memory control module


N


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between branch C and connector C-11
•  Open circuit in wiring harness between connector C-11 and connector C-38
•  Connector C-11 malfunction
•  Connector C-38 malfunction


System wiring diagram

ac9wzw00001818


Inspection item

•  Connector C-11 connector
•  Connector C-38 connector
•  Wiring harness between branch C and connector C-11
•  Wiring harness between connector C-11 and connector C-38


O


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness SAS control module and connector C-38
•  SAS control module malfunction
•  Connector C-38 malfunction


System wiring diagram

ac9wzw00001819


Inspection item

•  SAS control module connector
•  Connector C-38 connector
•  Wiring harness between SAS control module terminal 1X and connector C-38
•  Wiring harness between SAS control module terminal 1T and connector C-38
•  SAS control module


P


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness theft-deterrent control module and connector C-38
•  Connector C-38 malfunction
•  Theft-deterrent control module malfunction


System wiring diagram

ac9wzw00001820


Inspection item

•  Theft-deterrent control module connector
•  Connector C-38 connector
•  Wiring harness between theft-deterrent control module terminal K and connector C-38
•  Wiring harness between theft-deterrent control module terminal I and connector C-38
•  Theft-deterrent control module


Q


Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness instrument cluster and connector C-38
•  Connector C-38 malfunction
•  Instrument cluster malfunction


System wiring diagram

ac9wzw00001821


Inspection item

•  Instrument cluster connector
•  Connector C-38 connector
•  Wiring harness between instrument cluster terminal 1X and connector C-38
•  Wiring harness between instrument cluster terminal 1W and connector C-38
•  Instrument cluster