DTC U1002: Lost Communication with Gateway Module [09/2014 - 10/2015]: Procedure

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Resistance: Malfunction
   U56-3 (CANH) - U56-2 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω	Below 53 Ω: Short in line
   U56-3 (CANH) - U56-2 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω	Higher than 70 Ω: Open in CAN main bus line
   U56-3 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: +B short
   U56-2 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: +B short
   U56-3 (CANH) - U56-1 (E)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: Ground short
   U56-2 (CANL) - U56-1 (E)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: Ground short

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (No. 10 Junction Connector)
   *b	Front view of DLC3

   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: 

B 

See step  3

Result: 

C 

See step  8

Result: 

D 

See step  14

Result: 

A 

See step  2

1. Clear the DTCs.
2. Turn the engine switch off.
3. Turn the engine switch on (IG) check for DTCs.
   RESULT
   
   

   Result	Proceed to
   U1002 is output from network gateway ECU (Techstream display / Multi Bus Monitor 2)	A
   Other DTC is output	B

Result: 

A 

REPLACE NETWORK GATEWAY ECU 

(Refer to REMOVAL [09/2014 - ] )

Result: 

B 

GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC 

1. Disconnect the ECM connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   EXCEPT AA81E
   
   

   Tester Connection	Condition	Specified Condition
   A21-10 (CANU) - A21-9 (CAND)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   FOR AA81E
   
   

   Tester Connection	Condition	Specified Condition
   A21-18 (CANU) - A21-17 (CAND)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   TEXT IN ILLUSTRATION
   
   

   *A	except AA81E
   *B	for AA81E
   *a	Rear view of wire harness connector (to ECM)

Result: 

OK 

REPLACE ECM 

(Refer to REMOVAL [09/2014 - 10/2015] )

Result: 

NG 

See step  4

1. Reconnect the ECM connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the wire harness connector from the No. 5 junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   N133-1 (CANH) - N133-12 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω
   N133-5 (CANH) - N133-16 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   TEXT IN ILLUSTRATION
   
   

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

   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (to ECM main bus line)	B
   NG (to No. 2 junction connector main bus line)	C

Result: 

A 

REPLACE NO. 5 JUNCTION CONNECTOR 

Result: 

B 

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

Result: 

C 

See step  5

1. Reconnect the wire harness connector from the No. 5 junction connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the wire harness connector from the No. 2 junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   N132-2 (CANH) - N132-13 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω
   N132-5 (CANH) - N132-16 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to No. 2 Junction Connector)
   *b	to No. 3 Junction Connector
   *c	to No. 5 Junction Connector

   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (to No. 5 junction connector main bus line)	B
   NG (to No. 3 junction connector main bus line)	C

Result: 

A 

REPLACE NO. 2 JUNCTION CONNECTOR 

Result: 

B 

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

Result: 

C 

See step  6

1. Reconnect the wire harness connector from the No. 2 junction connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the wire harness connector from the No. 3 junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U54-5 (CANH) - U54-16 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω
   U54-6 (CANH) - U54-17 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to No. 3 Junction Connector)
   *b	to No. 10 Junction Connector
   *c	to No. 2 Junction Connector

   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (to No. 2 junction connector main bus line)	B
   NG (to No. 10 junction connector main bus line)	C

Result: 

A 

REPLACE NO. 3 JUNCTION CONNECTOR 

Result: 

B 

REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) 

Result: 

C 

See step  7

1. Reconnect the wire harness connector from the No. 3 junction connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the wire harness connector from the No. 10 junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U56-3 (CANH) - U56-2 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to No. 10 Junction Connector)

Result: 

OK 

REPLACE NO. 10 JUNCTION CONNECTOR 

Result: 

NG 

REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 10 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR) 

1. Disconnect the ECM connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   EXCEPT AA81E
   
   

   Tester Connection	Condition	Specified Condition
   A21-10 (CANU) - A21-9 (CAND)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   FOR AA81E
   
   

   Tester Connection	Condition	Specified Condition
   A21-18 (CANU) - A21-17 (CAND)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   TEXT IN ILLUSTRATION
   
   

   *A	except AA81E
   *B	for AA81E
   *a	Rear view of wire harness connector (to ECM)

Result: 

OK 

REPLACE ECM 

(Refer to REMOVAL [09/2014 - 10/2015] )

Result: 

NG 

See step  9

1. Reconnect the ECM connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the wire harness connector from the No. 5 junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   N133-1 (CANH) - N133-12 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω
   N133-2 (CANH) - N133-13 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   N133-3 (CANH) - N133-14 (CANL)*	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   N133-4 (CANH) - N133-15 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   N133-5 (CANH) - N133-16 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω
   N133-6 (CANH) - N133-17 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

   1. *: w/ Adaptive Variable Suspension System
   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to No. 5 Junction Connector)
   *b	to ECM
   *c	to Front Steering Control ECU
   *d	to Absorber Control ECU
   *e	to Network Gateway ECU
   *f	to No. 2 Junction Connector
   *g	to Power Steering ECU Assembly

   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (to ECM main bus line)	B
   NG (to No. 2 junction connector main bus line)	C
   NG (to Front steering control ECU branch bus line)	D
   NG (to Absorber control ECU branch bus line [w/ Adaptive Variable Suspension System])
   NG (to Network gateway ECU branch bus line)
   NG (to Power steering ECU assembly branch bus line)

Result: 

A 

REPLACE NO. 5 JUNCTION CONNECTOR 

Result: 

B 

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

Result: 

D 

See step  13

Result: 

C 

See step  10

1. Reconnect the wire harness connector from the No. 5 junction connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the wire harness connector from the No. 2 junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   N132-1 (CANH) - N132-12 (CANL)*	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   N132-2 (CANH) - N132-13 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω
   N132-3 (CANH) - N132-14 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   N132-5 (CANH) - N132-16 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   1. *: w/ Dynamic Radar Cruise Control System
   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to No. 2 Junction Connector)
   *b	to Driving Support ECU Assembly
   *c	to No. 3 Junction Connector
   *d	to Brake Actuator Assembly (Skid Control ECU)
   *e	to No. 5 Junction Connector

   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (to No. 5 junction connector main bus line)	B
   NG (to No. 3 junction connector main bus line)	C
   NG (to Driving support ECU assembly branch bus line [w/ Dynamic Radar Cruise Control System])	D
   NG (to Brake actuator assembly [skid control ECU] branch bus line)

Result: 

A 

REPLACE NO. 2 JUNCTION CONNECTOR 

Result: 

B 

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

Result: 

D 

See step  13

Result: 

C 

See step  11

1. Reconnect the wire harness connector from the No. 2 junction connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the wire harness connector from the No. 3 junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U54-5 (CANH) - U54-16 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω
   U54-6 (CANH) - U54-17 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω
   U54-7 (CANH) - U54-18 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to No. 3 Junction Connector)
   *b	to No. 10 Junction Connector
   *c	to No. 2 Junction Connector
   *d	to Rear Steering Control ECU

   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (to No. 2 junction connector main bus line)	B
   NG (to No. 10 junction connector main bus line)	C
   NG (to Rear steering control ECU branch bus line)	D

Result: 

A 

REPLACE NO. 3 JUNCTION CONNECTOR 

Result: 

B 

REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) 

Result: 

D 

See step  13

Result: 

C 

See step  12

1. Reconnect the wire harness connector from the No. 3 junction connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the wire harness connector from the No. 10 junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U56-3 (CANH) - U56-2 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to No. 10 Junction Connector)

Result: 

OK 

REPLACE NO. 10 JUNCTION CONNECTOR 

Result: 

NG 

REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 10 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR) 

1. Reconnect all wire harness connectors (No. 2 junction connector, No. 3 junction connector and No. 5 junction connector).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. 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 [09/2014 - 10/2015] ).
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U56-3 (CANH) - U56-2 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (No. 10 Junction Connector)

   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).
   • If the resistance does not become normal (between 54 and 69 Ω) when the connector is disconnected from the ECU (or sensor), repair or replace the short-circuited branch line or connector.

Result: 

OK 

REPLACE CORRESPONDING ECU 

Result: 

NG 

REPAIR OR REPLACE CORRESPONDING ECU WIRE 

1. Disconnect the wire harness connector from the No. 5 junction connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to No. 5 Junction Connector)	*b	Front view of DLC3
   *c	to ECM	*d	to Front Steering Control ECU
   *e	to Absorber Control ECU	*f	to Network Gateway ECU
   *g	to No. 2 Junction Connector	*h	to Power Steering ECU Assembly

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Purpose	Connected to
   N133-1 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANH ground short	ECM
   N133-12 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANL ground short
   N133-2 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANH ground short	Front steering control ECU
   N133-13 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANL ground short
   N133-3 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANH ground short	Absorber control ECU*
   N133-14 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANL ground short
   N133-4 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANH ground short	Network gateway ECU
   N133-15 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANL ground short
   N133-5 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANH ground short	No. 2 junction connector
   N133-16 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANL ground short
   N133-6 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANH ground short	Power steering ECU assembly
   N133-17 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANL ground short
   N133-1 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANH +B short	ECM
   N133-12 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANL +B short
   N133-2 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANH +B short	Front steering control ECU
   N133-13 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANL +B short
   N133-3 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANH +B short	Absorber control ECU*
   N133-14 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANL +B short
   N133-4 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANH +B short	Network gateway ECU
   N133-15 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANL +B short
   N133-5 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANH +B short	No. 2 junction connector
   N133-16 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANL +B short
   N133-6 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANH +B short	Power steering ECU assembly
   N133-17 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANL +B short

   1. *: w/ Adaptive Variable Suspension System
   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (to ECM main bus line)	B
   NG (to No. 2 junction connector main bus line)	C
   NG (to Front steering control ECU branch bus line)	D
   NG (to Absorber control ECU branch bus line [w/ Adaptive Variable Suspension System])
   NG (to Network gateway ECU branch bus line)
   NG (to Power steering ECU assembly branch bus line)

   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 19 inspection.

Result: 

A 

REPLACE NO. 5 JUNCTION CONNECTOR 

Result: 

C 

See step  16

Result: 

D 

See step  19

Result: 

B 

See step  15

1. Reconnect the wire harness connector from the No. 5 junction connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   EXCEPT AA81E
   
   

   Tester Connection	Condition	Specified Condition
   A21-10 (CANU) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   A21-9 (CAND) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   A21-10 (CANU) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
   A21-9 (CAND) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

   FOR AA81E
   
   

   Tester Connection	Condition	Specified Condition
   A21-18 (CANU) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   A21-17 (CAND) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   A21-18 (CANU) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
   A21-17 (CAND) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *A	except AA81E
   *B	for AA81E
   *a	Rear view of wire harness connector (to ECM)
   *b	Front view of DLC3

   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 19 inspection.

Result: 

OK 

REPLACE ECM 

(Refer to REMOVAL [09/2014 - 10/2015] )

Result: 

NG 

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

1. Reconnect the wire harness connector from the No. 5 junction connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to No. 2 Junction Connector)	*b	Front view of DLC3
   *c	to Driving Support ECU Assembly	*d	to No. 3 Junction Connector
   *e	to Brake Actuator Assembly (Skid Control ECU)	*f	to No. 5 Junction Connector

2. Disconnect the wire harness connector from the No. 2 junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Purpose	Connected to
   N132-1 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANH ground short	Driving support ECU assembly*
   N132-12 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANL ground short
   N132-2 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANH ground short	No. 3 junction connector
   N132-13 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANL ground short
   N132-3 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANH ground short	Brake actuator assembly (skid control ECU)
   N132-14 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANL ground short
   N132-5 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANH ground short	No. 5 junction connector
   N132-16 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANL ground short
   N132-1 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANH +B short	Driving support ECU assembly*
   N132-12 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANL +B short
   N132-2 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANH +B short	No. 3 junction connector
   N132-13 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANL +B short
   N132-3 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANH +B short	Brake actuator assembly (skid control ECU)
   N132-14 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANL +B short
   N132-5 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANH +B short	No. 5 junction connector
   N132-16 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANL +B short

   1. *: w/ Dynamic Radar Cruise Control System
   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (to No. 5 junction connector main bus line)	B
   NG (to No. 3 junction connector main bus line)	C
   NG (to Driving support ECU assembly branch bus line [w/ Dynamic Radar Cruise Control System])	D
   NG (to Brake actuator assembly [skid control ECU] branch bus line)

   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 19 inspection.

Result: 

A 

REPLACE NO. 2 JUNCTION CONNECTOR 

Result: 

B 

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

Result: 

D 

See step  19

Result: 

C 

See step  17

1. Reconnect the wire harness connector from the No. 2 junction connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to No. 3 Junction Connector)	*b	Front view of DLC3
   *c	to No. 10 Junction Connector	*d	to No. 2 Junction Connector
   *e	to Rear Steering Control ECU	-	-

2. Disconnect the wire harness connector from the No. 3 junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Purpose	Connected to
   U54-5 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANH ground short	No. 10 junction connector
   U54-16 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANL ground short
   U54-6 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANH ground short	No. 2 junction connector
   U54-17 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANL ground short
   U54-7 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANH ground short	Rear steering control ECU
   U54-18 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Inspection for CANL ground short
   U54-5 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANH +B short	No. 10 junction connector
   U54-16 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANL +B short
   U54-6 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANH +B short	No. 2 junction connector
   U54-17 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANL +B short
   U54-7 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANH +B short	Rear steering control ECU
   U54-18 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Inspection for CANL +B short

   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (to No. 2 junction connector main bus line)	B
   NG (to No. 10 junction connector main bus line)	C
   NG (to Rear steering control ECU branch bus line)	D

   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 19 inspection.

Result: 

A 

REPLACE NO. 3 JUNCTION CONNECTOR 

Result: 

B 

REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) 

Result: 

D 

See step  19

Result: 

C 

See step  18

1. Reconnect the wire harness connector from the No. 3 junction connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the wire harness connector from the No. 10 junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U56-3 (CANH) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   U56-2 (CANL) - N20-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   U56-3 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
   U56-2 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to No. 10 Junction Connector)
   *b	Front view of DLC3

   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 19 inspection.

Result: 

OK 

REPLACE NO. 10 JUNCTION CONNECTOR 

Result: 

NG 

REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 10 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR) 

1. Reconnect all wire harness connectors (No. 2 junction connector, No. 3 junction connector and No. 5 junction connector).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the connector that includes terminals CANH and CANL from the ECU to which the bus line shorted to B+ or shorted to GND is connected.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U56-3 (CANH) - U56-1 (E)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   U56-2 (CANL) - U56-1 (E)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   U56-3 (CANH) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
   U56-2 (CANL) - N20-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (No. 10 Junction Connector)
   *b	Front view of DLC3

   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 19 inspection.
   • If the resistance becomes abnormal when an ECU connector is reconnected, there may be a short in the ECU.

Result: 

OK 

REPLACE CORRESPONDING ECU 

Result: 

NG 

REPAIR OR REPLACE CORRESPONDING ECU WIRE