DTC U1002: Lost Communication with Gateway Module (Main Body ECU) [10/2015 - 09/2018]: Procedure

CHECK SUB BUS 1

Disconnect the cable from the negative (-) battery terminal.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Component with harness connected (Main Body ECU [Multiplex Network Body ECU])
*b	Front view of DLC3

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
N13-9 (CANP) - N13-10 (CANN)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω	Below 53 Ω: Short in line
N13-9 (CANP) - N13-10 (CANN)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω	Higher than 70 Ω: Open in CAN main bus line
N13-9 (CANP) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: +B short
N13-10 (CANN) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: +B short
N13-9 (CANP) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: Ground short
N13-10 (CANN) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: Ground short

Result

Result	Proceed to
OK	A
NG (Open circuit in CAN main bus wire)	B
NG (Short circuit between bus wires)	C
NG Ground short +B short	D

Result:

See step 3

Result:

See step 12

Result:

See step 22

Result:

See step 2

CHECK FOR DTC

Clear the DTCs.
Refer to DTC CHECK / CLEAR [09/2014 - ]

Recheck for DTCs and check that no DTCs are output.

Refer to DTC CHECK / CLEAR [09/2014 - ]

DTC U1002 is not output.

Result

Proceed to
OK
NG

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ]

Result:

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [09/2014 - ]

CHECK FOR OPEN IN CAN BUS WIRE (MAIN BODY ECU)

Disconnect the main body ECU (multiplex network body ECU) connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Rear view of wire harness connector (to Main Body ECU [Multiplex Network Body ECU])

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
N13-9 (CANP) - N13-10 (CANN)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result

Result
OK
NG

Result:

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [09/2014 - ]

Result:

See step 4

CONNECT CONNECTOR

Reconnect the N13 main body ECU (multiplex network body ECU) connector.

Result

Proceed to
NEXT

Result:

See step 5

CHECK FOR OPEN IN CAN BUS WIRE (NO. 2 CAN JUNCTION TERMINAL)

Disconnect the No. 2 CAN junction terminal connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Rear view of wire harness connector (to No. 2 CAN Junction Terminal)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
N135-3 (CANP) - N135-2 (CANN)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result

Result
OK
NG

Result:

REPLACE NO. 2 CAN JUNCTION TERMINAL

Result:

See step 6

CONNECT CONNECTOR

Reconnect the N135 No. 2 CAN junction terminal connector.

Result

Proceed to
NEXT

Result:

See step 7

CHECK FOR OPEN IN CAN BUS WIRE (NO. 7 CAN JUNCTION CONNECTOR)

Disconnect the No. 7 CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Rear view of wire harness connector (to No. 7 CAN Junction Connector)
*b	to Main Body ECU (Multiplex Network Body ECU)
*c	to No. 10 CAN Junction Connector

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
U54-20 (CANH) - U54-9 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Main body ECU (multiplex network body ECU)
U54-21 (CANH) - U54-10 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 10 CAN junction connector

Result

Result	Proceed to
OK	A
NG (to Main body ECU CAN main wire)	B
NG (to No. 10 CAN junction connector CAN main wire)	C

Result:

REPLACE NO. 7 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 7 CAN JUNCTION CONNECTOR - MAIN BODY ECU)

Result:

See step 8

CONNECT CONNECTOR

Reconnect the U54 No. 7 CAN junction connector.

Result

Proceed to
NEXT

Result:

See step 9

CHECK FOR OPEN IN CAN BUS WIRE (NO. 10 CAN JUNCTION CONNECTOR)

Disconnect the No. 10 CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Rear view of wire harness connector (to No. 10 CAN Junction Connector)
*b	to No. 7 CAN Junction Connector
*c	to No. 5 CAN Junction Connector

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
N130-8 (CANH) - N130-19 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 7 CAN junction connector
N130-11 (CANH) - N130-22 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 5 CAN junction connector

Result

Result	Proceed to
OK	A
NG (No. 7 CAN junction connector main wire)	B
NG (No. 5 CAN junction connector main wire)	C

Result:

REPLACE NO. 10 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - NO. 7 CAN JUNCTION CONNECTOR)

Result:

See step 10

CONNECT CONNECTOR

Reconnect the N130 No. 10 CAN junction connector.

Result

Proceed to
NEXT

Result:

See step 11

CHECK FOR OPEN IN CAN BUS WIRE (NO. 5 CAN JUNCTION CONNECTOR)

Disconnect the No. 5 CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Rear view of wire harness connector (to No. 5 CAN Junction Connector)
*b	to No. 10 CAN Junction Connector
*c	to No. 2 CAN Junction Terminal

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
N133-7 (CANH) - N133-18 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 10 CAN junction connector
N133-10 (CANH) - N133-21 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 2 CAN junction terminal

Result

Result	Proceed to
OK	A
NG (No. 10 CAN junction connector main wire)	B
NG (No. 2 CAN junction terminal main wire)	C

Result:

REPLACE NO. 5 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

Result:

REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION TERMINAL)

CHECK FOR SHORT IN CAN BUS WIRE (MAIN BODY ECU)

Disconnect the main body ECU (multiplex network body ECU) connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Rear view of wire harness connector (to Main Body ECU [Multiplex Network Body ECU])

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
N13-9 (CANP) - N13-10 (CANN)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result

Result
OK
NG

Result:

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [09/2014 - ]

Result:

See step 13

CONNECT CONNECTOR

Reconnect the N13 main body ECU (multiplex network body ECU) connector.

Result

Proceed to
NEXT

Result:

See step 14

CHECK FOR SHORT IN CAN BUS WIRE (NO. 2 CAN JUNCTION TERMINAL)

Disconnect the No. 2 CAN junction terminal connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Rear view of wire harness connector (to No. 2 CAN Junction Terminal)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
N135-3 (CANP) - N135-2 (CANN)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result

Result
OK
NG

Result:

REPLACE NO. 2 CAN JUNCTION TERMINAL

Result:

See step 15

CONNECT CONNECTOR

Reconnect the N135 No. 2 CAN junction terminal connector.

Result

Proceed to
NEXT

Result:

See step 16

CHECK FOR SHORT IN CAN BUS WIRE (NO. 7 CAN JUNCTION CONNECTOR)

Disconnect the No. 7 CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Rear view of wire harness connector (to No. 7 CAN Junction Connector)	*b	to Main Body ECU (Multiplex Network Body ECU)
*c	to No. 10 CAN Junction Connector	*d	to Luggage Closer Motor Assembly (w/ Power Trunk Lid System) to Multiplex Network Door ECU (w/o Power Trunk Lid System)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
U54-20 (CANH) - U54-9 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Main body ECU (multiplex network body ECU)
U54-21 (CANH) - U54-10 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 10 CAN junction connector
U54-22 (CANH) - U54-11 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Luggage closer motor assembly1 Multiplex network door ECU2
1: w/ Power Trunk Lid System 2: w/o Power Trunk Lid System

Result

Result	Proceed to
OK	A
NG (to Main body ECU CAN main wire)	B
NG (to No. 10 CAN junction connector CAN main wire)	C
NG (ECU or sensor CAN branch wire)	D

Result:

REPLACE NO. 7 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 7 CAN JUNCTION CONNECTOR - MAIN BODY ECU)

Result:

See step 21

Result:

See step 17

CONNECT CONNECTOR

Reconnect the U54 No. 7 CAN junction connector.

Result

Proceed to
NEXT

Result:

See step 18

CHECK FOR SHORT IN CAN BUS WIRE (NO. 10 CAN JUNCTION CONNECTOR)

Disconnect the No. 10 CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Rear view of wire harness connector (to No. 10 CAN Junction Connector)	*b	to Front Multiplex Network Door ECU LH
*c	to No. 7 CAN Junction Connector	*d	to Position Control ECU Assembly LH (except Standard Seat Type) to Power Seat Switch Assembly (for Standard Seat Type)
*e	to Multiplex Tilt and Telescopic ECU	*f	to No. 5 CAN Junction Connector

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
N130-7 (CANH) - N130-18 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Front multiplex network door ECU LH
N130-8 (CANH) - N130-19 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 7 CAN junction connector
N130-9 (CANH) - N130-20 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Position control ECU assembly LH1 Power seat switch assembly2
N130-10 (CANH) - N130-21 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Multiplex tilt and telescopic ECU
N130-11 (CANH) - N130-22 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 5 CAN junction connector
1: except Standard Seat Type 2: for Standard Seat Type

Result

Result	Proceed to
OK	A
NG (to No. 7 CAN junction connector CAN main wire)	B
NG (to No. 5 CAN junction connector CAN main wire)	C
NG (ECU or sensor CAN branch wire)	D

Result:

REPLACE NO. 10 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - NO. 7 CAN JUNCTION CONNECTOR)

Result:

See step 21

Result:

See step 19

CONNECT CONNECTOR

Reconnect the N130 No. 10 CAN junction connector.

Result

Proceed to
NEXT

Result:

See step 20

CHECK FOR SHORT IN CAN BUS WIRE (NO. 5 CAN JUNCTION CONNECTOR)

Disconnect the No. 5 CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Rear view of wire harness connector (to No. 5 CAN Junction Connector)	*b	to No. 10 CAN Junction Connector
*c	to Position Control ECU Assembly RH (for Luxury Seat Type)	*d	to No. 2 CAN Junction Terminal
*e	to Front Multiplex Network Door ECU RH	-	-

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
N133-7 (CANH) - N133-18 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 10 CAN junction connector
N133-9 (CANH) - N133-20 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Position control ECU assembly RH*
N133-10 (CANH) - N133-21 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 2 CAN junction terminal
N133-11 (CANH) - N133-22 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Front multiplex network door ECU RH
*: for Luxury Seat Type

Result

Result	Proceed to
OK	A
NG (to No. 2 CAN junction terminal CAN main wire)	B
NG (to No. 10 CAN junction connector CAN main wire)	C
NG (ECU or sensor CAN branch wire)	D

Result:

REPLACE NO. 5 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION TERMINAL)

Result:

REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

Result:

See step 21

CHECK FOR SHORT IN CAN BUS WIRE (ECU, SENSOR)

Reconnect the CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Component with harness connected (Main Body ECU [Multiplex Network Body ECU])

Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the short circuited branch line is connected.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
N13-9 (CANP) - N13-10 (CANN)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

Result

Result
OK
NG

Result:

REPLACE CORRESPONDING ECU OR SENSOR

Result:

REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH WIRE OR CONNECTOR

CHECK FOR SHORT IN CAN BUS WIRE (MAIN BODY ECU)

Disconnect the main body ECU (multiplex network body ECU) connector.

*a	Rear view of wire harness connector (Main Body ECU [Multiplex Network Body ECU])
*b	Front view of DLC3

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
N13-9 (CANP) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
N13-10 (CANN) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
N13-9 (CANP) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N13-10 (CANN) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

Result

Result
OK
NG

Result:

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [09/2014 - ]

Result:

See step 23

CONNECT CONNECTOR

Reconnect the N13 main body ECU (multiplex network body ECU) connector.

Result

Proceed to
NEXT

Result:

See step 24

CHECK FOR SHORT IN CAN BUS WIRE (NO. 7 CAN JUNCTION CONNECTOR)

Disconnect the No. 7 CAN junction connector.

*a	Rear view of wire harness connector (to No. 7 CAN Junction Connector)	*b	Front view of DLC3
*c	to Main Body ECU (Multiplex Network Body ECU)	*d	to No. 10 CAN Junction Connector
*e	to Luggage Closer Motor Assembly (w/ Power Trunk Lid System) to Multiplex Network Door ECU (w/o Power Trunk Lid System)	-	-

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
U54-20 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Main body ECU (multiplex network body ECU)
U54-9 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
U54-20 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
U54-9 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
U54-21 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	No. 10 CAN junction connector
U54-10 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
U54-21 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
U54-10 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
U54-22 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Luggage closer motor assembly1 Multiplex network door ECU2
U54-11 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
U54-22 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
U54-11 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
1: w/ Power Trunk Lid System 2: w/o Power Trunk Lid System

Result

Result	Proceed to
OK	A
NG (to Main body ECU CAN main wire)	B
NG (to No. 10 CAN junction connector CAN main wire)	C
NG (ECU or sensor CAN branch wire)	D

Result:

REPLACE NO. 7 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 7 CAN JUNCTION CONNECTOR - MAIN BODY ECU)

Result:

See step 29

Result:

See step 25

CONNECT CONNECTOR

Reconnect the U54 No. 7 CAN junction connector.

Result

Proceed to
NEXT

Result:

See step 26

CHECK FOR SHORT IN CAN BUS WIRE (NO. 10 CAN JUNCTION CONNECTOR)

Disconnect the No. 10 CAN junction connector.

*a	Rear view of wire harness connector (to No. 10 CAN Junction Connector)	*b	Front view of DLC3
*c	to Front Multiplex Network Door ECU LH	*d	to No. 7 CAN Junction Connector
*e	to Position Control ECU Assembly LH (except Standard Seat Type) to Power Seat Switch Assembly (for Standard Seat Type)	*f	to Multiplex Tilt and Telescopic ECU
*g	to No. 5 CAN Junction Connector	-	-

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
N130-7 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Front multiplex network door ECU LH
N130-18 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
N130-7 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N130-18 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N130-8 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	No. 7 CAN junction connector
N130-19 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
N130-8 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N130-19 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N130-9 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Position control ECU assembly LH1 Power seat switch assembly2
N130-20 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
N130-9 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N130-20 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N130-10 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Multiplex tilt and telescopic ECU
N130-21 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
N130-10 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N130-21 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N130-11 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	No. 5 CAN junction connector
N130-22 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
N130-11 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N130-22 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
1: except Standard Seat Type 2: for Standard Seat Type

Result

Result	Proceed to
OK	A
NG (to No. 7 CAN junction connector CAN main wire)	B
NG (to No. 5 CAN junction connector CAN main wire)	C
NG (ECU or sensor CAN branch wire)	D

Result:

REPLACE NO. 10 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - NO. 7 CAN JUNCTION CONNECTOR)

Result:

See step 29

Result:

See step 27

CONNECT CONNECTOR

Reconnect the N130 No. 10 CAN junction connector.

Result

Proceed to
NEXT

Result:

See step 28

CHECK FOR SHORT IN CAN BUS WIRE (NO. 5 CAN JUNCTION CONNECTOR)

Disconnect the No. 5 CAN junction connector.

*a	Rear view of wire harness connector (to No. 5 CAN Junction Connector)	*b	Front view of DLC3
*c	to No. 10 CAN Junction Connector	*d	to Position Control ECU Assembly RH (for Luxury Seat Type)
*e	to No. 2 CAN Junction Terminal	*f	to Front Multiplex Network Door ECU RH

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
N133-7 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	No. 10 CAN junction connector
N133-18 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
N133-7 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N133-18 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N133-9 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Position control ECU assembly RH*
N133-20 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
N133-9 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N133-20 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N133-10 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	No. 2 CAN junction terminal
N133-21 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
N133-10 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N133-21 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N133-11 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Front multiplex network door ECU RH
N133-22 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
N133-11 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N133-22 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

Result

Result	Proceed to
OK	A
NG (to No. 10 CAN junction connector CAN main wire)	B
NG (ECU or sensor CAN wire)	C

Result:

REPLACE NO. 5 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

Result:

See step 29

CHECK FOR SHORT IN CAN BUS WIRE (ECU, SENSOR)

Reconnect the CAN junction connector.

*a	Component with harness connected (Main Body ECU [Multiplex Network Body ECU])
*b	Front view of DLC3

Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the bus line shorted to +B, GND is connected.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
N13-9 (CANP) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
N13-10 (CANN) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
N13-9 (CANP) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
N13-10 (CANN) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

Result

Result
OK
NG

Result:

REPLACE CORRESPONDING ECU OR SENSOR

Result:

REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH WIRE OR CONNECTOR