Can Communication System (For Lhd) Short In Can Bus Lines

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PRECAUTION

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

CHECK FOR SHORT IN CAN BUS WIRES (DLC3 CAN BRANCH WIRE)

CONNECT CONNECTOR

SYSTEM CHECK

CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR SIDE)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - HEADLIGHT SWIVEL ECU ASSEMBLY)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - ECM)

CHECK FOR SHORT IN CAN BUS WIRES (HEADLIGHT SWIVEL ECU ASSEMBLY)

CHECK FOR SHORT IN CAN BUS WIRES (CENTER AIRBAG SENSOR ASSEMBLY)

CHECK FOR SHORT IN CAN BUS WIRES (ECM)

CONNECT CONNECTOR

CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR SIDE)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - MULTI-MEDIA MODULE RECEIVER ASSEMBLY)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - NETWORK GATEWAY ECU)

CHECK FOR SHORT IN CAN BUS WIRES (MULTI-MEDIA MODULE RECEIVER ASSEMBLY)

CHECK FOR SHORT IN CAN BUS WIRES (AIR CONDITIONING AMPLIFIER ASSEMBLY)

CHECK FOR SHORT IN CAN BUS WIRES (NETWORK GATEWAY ECU)

CONNECT CONNECTOR

CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - MAIN BODY ECU)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)

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

CHECK FOR SHORT IN CAN BUS WIRES (COMBINATION METER ASSEMBLY)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR SIDE)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - 4WD CONTROL ECU)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - ECM)

CHECK FOR SHORT IN CAN BUS WIRES (CENTER AIRBAG SENSOR ASSEMBLY)

CHECK FOR SHORT IN CAN BUS WIRES (4WD CONTROL ECU)

CHECK FOR SHORT IN CAN BUS WIRES (ECM)

CONNECT CONNECTOR

CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR SIDE)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - MULTI-MEDIA MODULE RECEIVER ASSEMBLY)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

CHECK FOR SHORT IN CAN BUS WIRES (MULTI-MEDIA MODULE RECEIVER ASSEMBLY)

CHECK FOR SHORT IN CAN BUS WIRES (AIR CONDITIONING AMPLIFIER ASSEMBLY)

CONNECT CONNECTOR

CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR SIDE)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - CLEARANCE WARNING ECU ASSEMBLY)

CHECK FOR SHORT IN CAN BUS WIRES (CLEARANCE WARNING ECU ASSEMBLY)

CONNECT CONNECTOR

CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - NO. 6 JUNCTION CONNECTOR)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - MAIN BODY ECU)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - SKID CONTROL ECU)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)

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

CHECK FOR SHORT IN CAN BUS WIRES (SKID CONTROL ECU)

CHECK FOR SHORT IN CAN BUS WIRES (COMBINATION METER ASSEMBLY)

CAN COMMUNICATION SYSTEM (for LHD) - Short in CAN Bus Lines

DESCRIPTION

There may be a short circuit between the CAN bus lines when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 54 Ω.

Symptom

Trouble Area

Resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 54 Ω.

Short between CAN bus lines ECM Center airbag sensor assembly*1 Headlight swivel ECU assembly*2 Multi-media module receiver assembly*3 Air conditioning amplifier assembly Main body ECU (cowl side junction block LH) Network gateway ECU*4 Combination meter assembly 4WD control ECU*5 Clearance warning ECU assembly*5, *6 Master cylinder solenoid (skid control ECU)*5 No. 1 junction connector No. 2 junction connector No. 3 junction connector No. 6 junction connector*5

1. *1: w/ Airbag System
   
2. *2: w/ Dynamic Headlight Auto Leveling
   
3. *3: w/ Navigation System
   
4. *4: w/ Network Gateway ECU
   
5. *5: w/o Network Gateway ECU
   
6. *6: w/ TOYOTA Parking Assist-sensor System and w/o Side Monitor System
   

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

1.PRECAUTION

NOTICE:

After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (Click here).

NEXT

2.DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.
   

   CAUTION:

   For vehicles with an SRS system:

   Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

   NOTICE:

   When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Click here).

NEXT

3.CHECK FOR SHORT IN CAN BUS WIRES (DLC3 CAN BRANCH WIRE)

1. Disconnect the E75 No. 3 junction connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E22-6 (CANH) - E22-14 (CANL)	Ignition switch off	1 MΩ or higher

   Text in Illustration

   *a	Front view of DLC3

NG	REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 (CANH, CANL)

OK

4.CONNECT CONNECTOR

1. Reconnect the E75 No. 3 junction connector.
   

NEXT

5.SYSTEM CHECK

1. Check the vehicle specifications.
   

   Result

   Result	Proceed to
   w/ Network Gateway ECU	A
   w/o Network Gateway ECU	B

B	Go to step 28

A

6.CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR SIDE)

1. Disconnect the E72 No. 1 junction connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E22-6 (CANH) - E22-14 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

   *a	Front view of DLC3

NG	Go to step 13

OK

7.CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - HEADLIGHT SWIVEL ECU ASSEMBLY)

NOTICE:

For vehicles without dynamic headlight auto leveling, go to "Check for Short in CAN Bus Wires (No. 1 Junction Connector - Center Airbag Sensor Assembly)".

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E72-3 (CANH) - E72-14 (CANL)	Ignition switch off	200 Ω or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 1 Junction Connector)

NG	Go to step 10

OK

8.CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E72-4 (CANH) - E72-15 (CANL)	Ignition switch off	200 Ω or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 1 Junction Connector)

NG	Go to step 11

OK

9.CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - ECM)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E72-2 (CANH) - E72-13 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 1 Junction Connector)

NG	Go to step 12

OK
REPLACE NO. 1 JUNCTION CONNECTOR

10.CHECK FOR SHORT IN CAN BUS WIRES (HEADLIGHT SWIVEL ECU ASSEMBLY)

1. Disconnect the E101 headlight swivel ECU assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E72-3 (CANH) - E72-14 (CANL)	Ignition switch off	1 MΩ or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 1 Junction Connector)

NG	REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO HEADLIGHT SWIVEL ECU ASSEMBLY (MPX1, MPX2)

OK
REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY (Click here)

11.CHECK FOR SHORT IN CAN BUS WIRES (CENTER AIRBAG SENSOR ASSEMBLY)

1. Disconnect the E47 center airbag sensor assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E72-4 (CANH) - E72-15 (CANL)	Ignition switch off	1 MΩ or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 1 Junction Connector)

NG	REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CENTER AIRBAG SENSOR ASSEMBLY (CANH, CANL)

OK
REPLACE CENTER AIRBAG SENSOR ASSEMBLY (Click here)

12.CHECK FOR SHORT IN CAN BUS WIRES (ECM)

1. Disconnect the A38 ECM connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E72-2 (CANH) - E72-13 (CANL)	Ignition switch off	1 MΩ or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 1 Junction Connector)

   Result

   Result	Proceed to
   OK (for 1GR-FE)	A
   OK (for 1UR-FE)	B
   OK (for 3UR-FE)	C
   OK (for 1VD-FTV)	D
   NG	E

B	REPLACE ECM (Click here)
C	REPLACE ECM (Click here)
D	REPLACE ECM (Click here)
E	REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (CANH, CANL)

A
REPLACE ECM (Click here)

13.CONNECT CONNECTOR

1. Reconnect the E72 No. 1 junction connector.
   

NEXT

14.CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)

1. Disconnect the E69 No. 2 junction connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E69-1 (CANH) - E69-12 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

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

NG	REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)

OK

15.CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR SIDE)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E22-6 (CANH) - E22-14 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

   *a	Front view of DLC3

NG	Go to step 22

OK

16.CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - MULTI-MEDIA MODULE RECEIVER ASSEMBLY)

NOTICE:

For vehicles without a navigation system, go to "Check for Short in CAN Bus Wires (No. 2 Junction Connector - Air Conditioning Amplifier Assembly)".

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E69-2 (CANH) - E69-13 (CANL)	Ignition switch off	200 Ω or higher

   Text in Illustration

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

NG	Go to step 19

OK

17.CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E69-5 (CANH) - E69-16 (CANL)	Ignition switch off	200 Ω or higher

   Text in Illustration

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

NG	Go to step 20

OK

18.CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - NETWORK GATEWAY ECU)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E69-3 (CANH) - E69-14 (CANL)	Ignition switch off	200 Ω or higher

   Text in Illustration

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

NG	Go to step 21

OK
REPLACE NO. 2 JUNCTION CONNECTOR

19.CHECK FOR SHORT IN CAN BUS WIRES (MULTI-MEDIA MODULE RECEIVER ASSEMBLY)

1. Disconnect the F77 multi-media module receiver assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E69-2 (CANH) - E69-13 (CANL)	Ignition switch off	1 MΩ or higher

   Text in Illustration

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

NG	REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MULTI-MEDIA MODULE RECEIVER ASSEMBLY (CANH, CANL)

OK
REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY (Click here)

20.CHECK FOR SHORT IN CAN BUS WIRES (AIR CONDITIONING AMPLIFIER ASSEMBLY)

1. Disconnect the E35*1 or E81*2 air conditioning amplifier assembly connector.
   *1: w/ Rear Air Conditioning System
   *2: w/o Rear Air Conditioning System
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E69-5 (CANH) - E69-16 (CANL)	Ignition switch off	1 MΩ or higher

   Text in Illustration

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

NG	REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIR CONDITIONING AMPLIFIER ASSEMBLY (CANH, CANL)

OK
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)

21.CHECK FOR SHORT IN CAN BUS WIRES (NETWORK GATEWAY ECU)

1. Disconnect the E31 network gateway ECU connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E69-3 (CANH) - E69-14 (CANL)	Ignition switch off	1 MΩ or higher

   Text in Illustration

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

NG	REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO NETWORK GATEWAY ECU (CA1H, CA1L)

OK
REPLACE NETWORK GATEWAY ECU (Click here)

22.CONNECT CONNECTOR

1. Reconnect the E69 No. 2 junction connector.
   

NEXT

23.CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)

1. Disconnect the E75 No. 3 junction connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E75-1 (CANH) - E75-12 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

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

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

OK

24.CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - MAIN BODY ECU)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E75-4 (CANH) - E75-15 (CANL)	Ignition switch off	200 Ω or higher

   Text in Illustration

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

NG	Go to step 26

OK

25.CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E75-3 (CANH) - E75-14 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

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

NG	Go to step 27

OK
REPLACE NO. 3 JUNCTION CONNECTOR

26.CHECK FOR SHORT IN CAN BUS WIRES (MAIN BODY ECU)

1. Disconnect the E3 main body ECU (cowl side junction block LH) connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E75-4 (CANH) - E75-15 (CANL)	Ignition switch off	1 MΩ or higher

   Text in Illustration

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

NG	REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MAIN BODY ECU (CANH, CANL)

OK
REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

27.CHECK FOR SHORT IN CAN BUS WIRES (COMBINATION METER ASSEMBLY)

1. Disconnect the E7 combination meter assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E75-3 (CANH) - E75-14 (CANL)	Ignition switch off	1 MΩ or higher

   Text in Illustration

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

   Result

   Result	Proceed to
   OK (w/ Multi-information Display)	A
   OK (w/o Multi-information Display)	B
   NG	C

B	REPLACE COMBINATION METER ASSEMBLY (Click here)
C	REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ASSEMBLY (CANH, CANL)

A
REPLACE COMBINATION METER ASSEMBLY (Click here)

28.CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR SIDE)

1. Disconnect the E72 No. 1 junction connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E22-6 (CANH) - E22-14 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

   *a	Front view of DLC3

NG	Go to step 35

OK

29.CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)

NOTICE:

For vehicles without an airbag system, go to "Check for Short in CAN Bus Wires (No. 2 Junction Connector - 4WD Control ECU)".

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E72-4 (CANH) - E72-15 (CANL)	Ignition switch off	200 Ω or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 1 Junction Connector)

NG	Go to step 32

OK

30.CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - 4WD CONTROL ECU)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E72-5 (CANH) - E72-16 (CANL)	Ignition switch off	200 Ω or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 1 Junction Connector)

NG	Go to step 33

OK

31.CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - ECM)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E72-2 (CANH) - E72-13 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 1 Junction Connector)

NG	Go to step 34

OK
REPLACE NO. 1 JUNCTION CONNECTOR

32.CHECK FOR SHORT IN CAN BUS WIRES (CENTER AIRBAG SENSOR ASSEMBLY)

1. Disconnect the E47 center airbag sensor assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E72-4 (CANH) - E72-15 (CANL)	Ignition switch off	1 MΩ or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 1 Junction Connector)

NG	REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CENTER AIRBAG SENSOR ASSEMBLY (CANH, CANL)

OK
REPLACE CENTER AIRBAG SENSOR ASSEMBLY (Click here)

33.CHECK FOR SHORT IN CAN BUS WIRES (4WD CONTROL ECU)

1. Disconnect the A27 4WD control ECU connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E72-5 (CANH) - E72-16 (CANL)	Ignition switch off	1 MΩ or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 1 Junction Connector)

NG	REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO 4WD CONTROL ECU (CAN+, CAN-)

OK
REPLACE 4WD CONTROL ECU (Click here)

34.CHECK FOR SHORT IN CAN BUS WIRES (ECM)

1. Disconnect the A38 ECM connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E72-2 (CANH) - E72-13 (CANL)	Ignition switch off	1 MΩ or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 1 Junction Connector)

   Result

   Result	Proceed to
   OK (for 1GR-FE)	A
   OK (for 1UZ-FE)	B
   OK (for 1VD-FTV)	C
   NG	D

B	REPLACE ECM (Click here)
C	REPLACE ECM (Click here)
D	REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (CANH, CANL)

A
REPLACE ECM (Click here)

35.CONNECT CONNECTOR

1. Reconnect the E72 No. 1 junction connector.
   

NEXT

36.CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)

1. Disconnect the E69 No. 2 junction connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E69-1 (CANH) - E69-12 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

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

NG	REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)

OK

37.CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR SIDE)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E22-6 (CANH) - E22-14 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

   *a	Front view of DLC3

NG	Go to step 42

OK

38.CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - MULTI-MEDIA MODULE RECEIVER ASSEMBLY)

NOTICE:

For vehicles without a navigation system, go to "Check for Short in CAN Bus Wires (No. 2 Junction Connector - Air Conditioning Amplifier)".

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E69-2 (CANH) - E69-13 (CANL)	Ignition switch off	200 Ω or higher

   Text in Illustration

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

NG	Go to step 40

OK

39.CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E69-5 (CANH) - E69-16 (CANL)	Ignition switch off	200 Ω or higher

   Text in Illustration

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

NG	Go to step 41

OK
REPLACE NO. 2 JUNCTION CONNECTOR

40.CHECK FOR SHORT IN CAN BUS WIRES (MULTI-MEDIA MODULE RECEIVER ASSEMBLY)

1. Disconnect the F77 multi-media module receiver assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E69-2 (CANH) - E69-13 (CANL)	Ignition switch off	1 MΩ or higher

   Text in Illustration

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

NG	REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MULTI-MEDIA MODULE RECEIVER ASSEMBLY (CANH, CANL)

OK
REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY (Click here)

41.CHECK FOR SHORT IN CAN BUS WIRES (AIR CONDITIONING AMPLIFIER ASSEMBLY)

1. Disconnect the E35*1 or E81*2 air conditioning amplifier connector.
   

   1. *1: w/ Rear Air Conditioning System
      
   2. *2: w/o Rear Air Conditioning System
      

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E69-5 (CANH) - E69-16 (CANL)	Ignition switch off	1 MΩ or higher

   Text in Illustration

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

NG	REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIR CONDITIONING AMPLIFIER ASSEMBLY (CANH, CANL)

OK
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)

42.CONNECT CONNECTOR

1. Reconnect the E69 No. 2 junction connector.
   

NEXT

43.CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)

1. Disconnect the F73 No. 6 junction connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   F73-7 (CANH) - F73-18 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 6 Junction Connector)

NG	REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 6 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)

OK

44.CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR SIDE)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E22-6 (CANH) - E22-14 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

   *a	Front view of DLC3

   Result

   Result	Proceed to
   OK (w/ TOYOTA parking assist-sensor system)	A
   OK (w/o TOYOTA parking assist-sensor system)	B
   NG	C

B	REPLACE NO. 6 JUNCTION CONNECTOR
C	Go to step 47

A

45.CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - CLEARANCE WARNING ECU ASSEMBLY)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   F73-5 (CANH) - F73-16 (CANL)	Ignition switch off	200 Ω or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 6 Junction Connector)

NG	Go to step 46

OK
REPLACE NO. 6 JUNCTION CONNECTOR

46.CHECK FOR SHORT IN CAN BUS WIRES (CLEARANCE WARNING ECU ASSEMBLY)

1. Disconnect the F12 clearance warning ECU assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   F73-5 (CANH) - F73-16 (CANL)	Ignition switch off	200 Ω or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 6 Junction Connector)

NG	REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CLEARANCE WARNING ECU ASSEMBLY (CANH, CANL)

OK
REPLACE CLEARANCE WARNING ECU ASSEMBLY (Click here)

47.CONNECT CONNECTOR

1. Reconnect the F73 No. 6 junction connector.
   

NEXT

Go to step 45

48.CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - NO. 6 JUNCTION CONNECTOR)

1. Disconnect the E75 No. 3 junction connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E75-1 (CANH) - E75-12 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

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

NG	REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - NO. 6 JUNCTION CONNECTOR)

OK

49.CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - MAIN BODY ECU)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E75-4 (CANH) - E75-15 (CANL)	Ignition switch off	200 Ω or higher

   Text in Illustration

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

NG	Go to step 52

OK

50.CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - SKID CONTROL ECU)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E75-5 (CANH) - E75-16 (CANL)	Ignition switch off	200 Ω or higher

   Text in Illustration

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

NG	Go to step 53

OK

51.CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E75-3 (CANH) - E75-14 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

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

NG	Go to step 54

OK
REPLACE NO. 3 JUNCTION CONNECTOR

52.CHECK FOR SHORT IN CAN BUS WIRES (MAIN BODY ECU)

1. Disconnect the E3 main body ECU (cowl side junction block LH) connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E75-4 (CANH) - E75-15 (CANL)	Ignition switch off	1 MΩ or higher

   Text in Illustration

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

NG	REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MAIN BODY ECU (CANH, CANL)

OK
REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

53.CHECK FOR SHORT IN CAN BUS WIRES (SKID CONTROL ECU)

1. Disconnect the A24 master cylinder solenoid (skid control ECU) connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E75-5 (CANH) - E75-16 (CANL)	Ignition switch off	1 MΩ or higher

   Text in Illustration

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

NG	REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO SKID CONTROL ECU (CANH, CANL)

OK
REPLACE MASTER CYLINDER SOLENOID (SKID CONTROL ECU) (Click here)

54.CHECK FOR SHORT IN CAN BUS WIRES (COMBINATION METER ASSEMBLY)

1. Disconnect the E7 combination meter assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   E75-3 (CANH) - E75-14 (CANL)	Ignition switch off	1 MΩ or higher

   Text in Illustration

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

   Result

   Result	Proceed to
   OK (w/ Multi-information Display)	A
   OK (w/o Multi-information Display)	B
   NG	C

B	REPLACE COMBINATION METER ASSEMBLY (Click here)
C	REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ASSEMBLY (CANH, CANL)

A
REPLACE COMBINATION METER ASSEMBLY (Click here)