DTC U1002: Lost Communication with Gateway Module (Main Body ECU) [12/2013 - 11/2016]: Procedure

CHECK SUB BUS 1

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

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1	DLC3
*a	Component with harness connected (Main Body ECU (Multiplex Network Body ECU))

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
F18-9 (CANP) - F18-10 (CANN)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω	Below 54 Ω: Short circuit between bus lines
F18-9 (CANP) - F18-10 (CANN)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω	70 Ω or more: Open circuit in main bus line
F18-9 (CANP) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short
F18-10 (CANN) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short
F18-9 (CANP) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
F18-10 (CANN) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short

Result

Result	Proceed to
OK	A
Open circuit in CAN main bus line	B
Short circuit between bus lines	C
Ground short +B short	D

Result:

See step 3

Result:

See step 7

Result:

See step 12

Result:

See step 2

CHECK FOR DTC OUTPUT

Reconnect the cable to the negative (-) battery terminal.
Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Clear the DTCs.
Body Electrical > Main Body > Clear DTCs
Turn the ignition switch off.
Turn the ignition switch to ON.

Check for DTCs.

Body Electrical > Main Body > Trouble Codes

Result

Result	Proceed to
DTC U1002 not output from main body ECU (multiplex network body ECU) (Techstream display: Main Body)	A
DTC U1002 is output from main body ECU (multiplex network body ECU) (Techstream display: Main Body)	B

Result:

SYMPTOM SIMULATION. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - 11/2016]

Result:

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [12/2013 - ]

CHECK FOR OPEN IN SUB BUS 1 LINES (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

Disconnect the F18 main body ECU (multiplex network body ECU) connector.

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to Main Body ECU (Multiplex Network Body ECU))

Standard Resistance

Tester Connection	Condition	Specified Condition
F18-9 (CANP) - F18-10 (CANN)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result:

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [12/2013 - ]

Result:

See step 4

CHECK FOR OPEN IN SUB BUS 1 LINES (MULTIPLEX NETWORK DOOR ECU)

Reconnect the F18 main body ECU (multiplex network body ECU) connector.
Disconnect the X6 multiplex network door ECU connector.

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to Multiplex Network Door ECU)

Standard Resistance

Tester Connection	Condition	Specified Condition
X6-13 (CANP) - X6-14 (CANN)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result:

REPLACE MULTIPLEX NETWORK DOOR ECU. Refer to REMOVAL [12/2013 - ]

Result:

See step 5

CHECK FOR OPEN IN SUB BUS 1 LINES (NO. 6 CAN JUNCTION CONNECTOR)

Reconnect the X6 multiplex network door ECU connector.
Disconnect the F112 No. 6 CAN junction connector.

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to No. 6 CAN Junction Connector)
*b	to Main Body ECU (Multiplex Network Body ECU)
*c	to No. 5 CAN Junction Connector

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
F112-2 (CANH) - F112-13 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Main body ECU (multiplex network body ECU)
F112-5 (CANH) - F112-16 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 5 CAN junction connector

Result

Result	Proceed to
OK	A
NG (Main body ECU (multiplex network body ECU) main line)	B
NG (No. 5 CAN junction connector main line)	C

Result:

REPLACE NO. 6 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

Result:

See step 6

CHECK FOR OPEN IN SUB BUS 1 LINES (NO. 5 CAN JUNCTION CONNECTOR)

Reconnect the F112 No. 6 CAN junction connector.
Disconnect the F111 No. 5 CAN junction connector.

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to No. 5 CAN Junction Connector)
*b	to Multiplex Network Door ECU
*c	to No. 6 CAN Junction Connector

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
F111-1 (CANH) - F111-12 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Multiplex network door ECU
F111-5 (CANH) - F111-16 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 6 CAN junction connector

Result

Result	Proceed to
OK	A
NG (No. 6 CAN junction connector main line)	B
NG (Multiplex network door ECU main line)	C

Result:

REPLACE NO. 5 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR)

Result:

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - MULTIPLEX NETWORK DOOR ECU)

CHECK FOR SHORT IN SUB BUS 1 LINES (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

Disconnect the F18 main body ECU (multiplex network body ECU) connector.

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to Main Body ECU (Multiplex Network Body ECU))

Standard Resistance

Tester Connection	Condition	Specified Condition
F18-9 (CANP) - F18-10 (CANN)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result:

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [12/2013 - ]

Result:

See step 8

CHECK FOR SHORT IN SUB BUS 1 LINES (MULTIPLEX NETWORK DOOR ECU)

Reconnect the F18 main body ECU (multiplex network body ECU) connector.
Disconnect the X6 multiplex network door ECU connector.

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to Multiplex Network Door ECU)

Standard Resistance

Tester Connection	Condition	Specified Condition
X6-13 (CANP) - X6-14 (CANN)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result:

REPLACE MULTIPLEX NETWORK DOOR ECU. Refer to REMOVAL [12/2013 - ]

Result:

See step 9

CHECK FOR SHORT IN SUB BUS 1 LINES (NO. 6 CAN JUNCTION CONNECTOR)

Reconnect the X6 multiplex network door ECU connector.
Disconnect the F112 No. 6 CAN junction connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
F112-2 (CANH) - F112-13 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Main body ECU (multiplex network body ECU)
F112-3 (CANH) - F112-14 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Outer mirror control ECU assembly (for front passenger side)*
F112-5 (CANH) - F112-16 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 5 CAN junction connector
*: w/ Seat Position Memory System

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to No. 6 CAN Junction Connector)
*b	to Main Body ECU (Multiplex Network Body ECU)
*c	to Outer Mirror Control ECU Assembly (for Front Passenger Side) (w/ Seat Position Memory System)
*d	to No. 5 CAN Junction Connector
*: w/ Seat Position Memory System

Result

Result	Proceed to
OK	A
NG (Main body ECU (multiplex network body ECU) main line)	B
NG (ECU or sensor branch line)	C
NG (No. 5 CAN junction connector main line)	D

Result:

REPLACE NO. 6 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

Result:

See step 11

Result:

See step 10

CHECK FOR SHORT IN SUB BUS 1 LINES (NO. 5 CAN JUNCTION CONNECTOR)

Reconnect the F112 No. 6 CAN junction connector.
Disconnect the F111 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
F111-1 (CANH) - F111-12 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Multiplex network door ECU*1
F111-3 (CANH) - F111-14 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Position control ECU and switch assembly*2
F111-4 (CANH) - F111-15 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Outer mirror control ECU assembly (for driver side)*2
F111-5 (CANH) - F111-16 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 6 CAN junction connector
1: w/ Power Back Door System 2: w/ Seat Position Memory System

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to No. 5 CAN Junction Connector)
*b	to Multiplex Network Door ECU (w/ Power Back Door System)
*c	to Position Control ECU and Switch Assembly (w/ Seat Position Memory System)
*d	to Outer Mirror Control ECU Assembly (for Driver Side) (w/ Seat Position Memory System)
*e	to No. 6 CAN Junction Connector

Result

Result	Proceed to
OK	A
NG (No. 6 CAN junction connector main line)	B
NG (ECU or sensor branch line)	C
NG (Multiplex network door ECU main line)	D

Result:

REPLACE NO. 5 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR)

Result:

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - MULTIPLEX NETWORK DOOR ECU)

Result:

See step 11

CHECK FOR SHORT IN SUB BUS 1 LINES (ECU, SENSOR)

Reconnect all wire harness connectors.
Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the short circuited branch line is connected.
Refer to TERMINALS OF ECU [12/2013 - 11/2015] or TERMINALS OF ECU [11/2015 - 11/2016]

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

Standard Resistance

Tester Connection	Condition	Specified Condition
F18-9 (CANP) - F18-10 (CANN)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

HINT:

If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Result:

REPLACE CORRESPONDING ECU OR SENSOR

Result:

REPAIR OR REPLACE CORRESPONDING ECU SENSOR BUS LINES OR CONNECTOR

CHECK FOR SHORT IN SUB BUS 1 LINE (NO. 6 CAN JUNCTION CONNECTOR)

Disconnect the F112 No. 6 CAN junction connector.

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

*1	DLC3	-	-
*a	Front view of wire harness connector (to No. 6 CAN Junction Connector)	*b	to Main Body ECU (Multiplex Network Body ECU)
*c	to Outer Mirror Control ECU Assembly (for Front Passenger Side) (w/ Seat Position Memory System)	*d	to No. 5 CAN Junction Connector

Standard Resistance

Tester Connection	Condition	Specified Condition	Result	Connected to
F112-2 (CANH) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	Main body ECU (multiplex network body ECU)
F112-13 (CANL) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	Main body ECU (multiplex network body ECU)
F112-3 (CANH) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	Outer mirror control ECU assembly (for front passenger side)*
F112-14 (CANL) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short
F112-5 (CANH) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	No. 5 CAN junction connector
F112-16 (CANL) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	No. 5 CAN junction connector
F112-2 (CANH) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Main body ECU (multiplex network body ECU)
F112-13 (CANL) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Main body ECU (multiplex network body ECU)
F112-3 (CANH) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Outer mirror control ECU assembly (for front passenger side)*
F112-14 (CANL) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short
F112-5 (CANH) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	No. 5 CAN junction connector
F112-16 (CANL) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	No. 5 CAN junction connector
*: w/ Seat Position Memory System HINT: It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection. Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 1 inspection.

Result

Result	Proceed to
OK	A
NG (Main body ECU (multiplex network body ECU) main line)	B
NG (ECU or sensor bus line)	C
NG (No. 5 CAN junction connector main line)	D

Result:

REPLACE NO. 6 CAN JUNCTION CONNECTOR

Result:

See step 15

Result:

See step 14

Result:

See step 13

CHECK FOR SHORT IN SUB BUS 1 LINE (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

Reconnect the F112 No. 6 CAN junction connector.
Disconnect the F18 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	Result
F18-9 (CANP) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short
F18-10 (CANN) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short
F18-9 (CANP) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
F18-10 (CANN) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short

*1	DLC3
*a	Front view of wire harness connector (to Main Body ECU (Multiplex Network Body ECU))

HINT:

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.
Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 1 inspection.

Result:

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [12/2013 - ]

Result:

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

CHECK FOR SHORT IN SUB BUS 1 LINE (NO. 5 CAN JUNCTION CONNECTOR)

Reconnect the F112 No. 6 CAN junction connector.
Disconnect the F111 No. 5 CAN junction connector.

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

*1	DLC3	-	-
*a	Front view of wire harness connector (to No. 5 CAN Junction Connector)	*b	to Multiplex Network Door ECU (w/ Power Back Door System)
*c	to Position Control ECU and Switch Assembly (w/ Seat Position Memory System)	*d	to Outer Mirror Control ECU Assembly (for Driver Side) (w/ Seat Position Memory System)
*e	to No. 6 CAN Junction Connector	-	-

Standard Resistance

Tester Connection	Condition	Specified Condition	Result	Connected to
F111-1 (CANH) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	Multiplex network door ECU*1
F111-12 (CANL) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	Multiplex network door ECU*1
F111-3 (CANH) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	Position control ECU and switch assembly*2
F111-14 (CANL) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	Position control ECU and switch assembly*2
F111-4 (CANH) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	Outer mirror control ECU assembly (for driver side)*2
F111-15 (CANL) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	Outer mirror control ECU assembly (for driver side)*2
F111-5 (CANH) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	No. 6 CAN junction connector
F111-16 (CANL) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	No. 6 CAN junction connector
F111-1 (CANH) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Multiplex network door ECU*1
F111-12 (CANL) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Multiplex network door ECU*1
F111-3 (CANH) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Position control ECU and switch assembly*2
F111-14 (CANL) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Position control ECU and switch assembly*2
F111-4 (CANH) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Outer mirror control ECU assembly (for driver side)*2
F111-15 (CANL) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Outer mirror control ECU assembly (for driver side)*2
F111-5 (CANH) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	No. 6 CAN junction connector
F111-16 (CANL) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	No. 6 CAN junction connector
1: w/ Power Back Door System 2: w/ Seat Position Memory System HINT: It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection. Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 1 inspection.

Result

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

Result:

REPLACE NO. 5 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR)

Result:

See step 15

CHECK FOR SHORT IN SUB BUS 1 LINE (ECU, SENSOR)

Reconnect all wire harness connectors.
Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the bus line shorted to +B or shorted to GND is connected.
Refer to TERMINALS OF ECU [12/2013 - 11/2015] or TERMINALS OF ECU [11/2015 - 11/2016]

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
F18-9 (CANP) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short
F18-10 (CANN) - F25-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short
F18-9 (CANP) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
F18-10 (CANN) - F25-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short

*1	DLC3
*a	Component with harness connected (Main Body ECU (Multiplex Network Body ECU))

HINT:

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.
If the resistance becomes normal when the connector is disconnected from the ECU, there may be a short in the ECU.
Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 1 inspection.

Result:

REPLACE CORRESPONDING ECU OR SENSOR

Result:

REPAIR OR REPLACE CORRESPONDING ECU SENSOR BUS LINES OR CONNECTOR