Can Communication System (For Rhd Without Central Gateway Ecu) Short In Can Bus Lines

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

CONNECT CONNECTOR

CHECK FOR SHORT IN CAN BUS WIRES (COMBINATION METER ASSEMBLY - NO. 2 CAN JUNCTION CONNECTOR)

CONNECT CONNECTOR

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

CONNECT CONNECTOR

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

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

DESCRIPTION

1. *1: w/ Variable Flow Control Solenoid Valve
   
2. *2: w/ Tire Pressure Warning System
   
3. *3: w/ Entry and Start System
   
4. *4: w/ Variable Gear Ratio Steering System
   
5. *5: for Multi-media Module Receiver Assembly
   
6. *6: w/ Option Connector
   

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
   
2. 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).
   

HINT:

1. Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
   
2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
   

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

2. Disconnect the ECM connector.
   

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

   Standard Resistance:

   for 1UR-FE, 1GR-FE:

   Tester Connection	Condition	Specified Condition
   A52-10 (CANH) - A52-11 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   for 1VD-FTV:

   Tester Connection	Condition	Specified Condition
   A52-41 (CANH) - A52-49 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   Text in Illustration

   *A	for 1UR-FE, 1GR-FE
   *B	for 1VD-FTV
   *a	Front view of wire harness connector (to ECM)

   Result

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

1. Reconnect the A52 ECM connector.
   

1. Disconnect the combination meter assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E119-39 (CANH) - E119-40 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   Text in Illustration

   *a	Rear view of wire harness connector (to Combination Meter Assembly)

1. Reconnect the E119 combination meter assembly connector.
   

HINT:

If there is a short in the connection line while accessory parts are not connected, repair or replace the CAN bus branch line or connector.

1. Disconnect the No. 1 CAN junction connector.
   

   
   
   
   
   

   Text in Illustration

   *a	Front view of wire harness connector (to No. 1 CAN Junction Connector)	*b	to No. 2 CAN Junction Connector
   *c	to Main Body ECU (Multiplex Network Body ECU)	*d	to Master Cylinder Solenoid (Skid Control ECU)
   *e	to Headlight Leveling ECU Assembly	*f	to Multi-media Module Receiver Assembly (for Multi-media Module Receiver Type) to Option Connector (w/ Option Connector)
   *g	to Air Conditioning Amplifier Assembly	*h	to ECM
   *i	to Bus Buffer ECU (w/ Bus Buffer ECU)	-	-

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition	Connect to
   E133-1 (CANH) - E133-11 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 2 CAN junction connector
   E133-2 (CANH) - E133-12 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Main body ECU (multiplex network body ECU)
   E133-3 (CANH) - E133-13 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Master cylinder solenoid (skid control ECU)
   E133-4 (CANH) - E133-14 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Headlight leveling ECU assembly
   E133-5 (CANH) - E133-15 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Multi-media module receiver assembly*1 Option connector*2
   E133-6 (CANH) - E133-16 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Air conditioning amplifier assembly
   E133-7 (CANH) - E133-17 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	ECM
   E133-10 (CANH) - E133-20 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Bus buffer ECU*3

   1. *1: for Multi-media Module Receiver Type
      
   2. *2: w/ Option Connector
      
   3. *3: w/ Bus Buffer ECU
      

   Result

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

1. Reconnect the E133 No. 1 CAN junction connector.
   

1. Disconnect the No. 2 CAN junction connector.
   

   
   
   
   
   

   Text in Illustration

   *a	Front view of wire harness connector (to No. 2 CAN Junction Connector)	*b	to No. 1 CAN Junction Connector
   *c	to 4WD Control ECU	*d	to Power Steering ECU Assembly (w/ Variable Flow Control Solenoid Valve)
   *e	to Airbag Sensor Assembly	*f	to Tire Pressure Warning ECU (w/ Tire Pressure Warning System)
   *g	to Spiral with Sensor Cable Sub-assembly (Steering Angle Sensor)	*h	to Combination Meter Assembly
   *i	to Certification ECU (Smart Key ECU Assembly) (w/ Entry and Start System)	*j	to Steering Control ECU (w/ Variable Gear Ratio Steering System)
   *k	to DLC3	-	-

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition	Connect to
   E135-1 (CANH) - E135-11 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 1 CAN junction connector
   E135-2 (CANH) - E135-12 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	4WD control ECU
   E135-3 (CANH) - E135-13 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Power steering ECU assembly*1
   E135-4 (CANH) - E135-14 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Airbag sensor assembly
   E135-5 (CANH) - E135-15 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Tire pressure warning ECU*2
   E135-6 (CANH) - E135-16 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Spiral with sensor cable sub-assembly (steering angle sensor)
   E135-7 (CANH) - E135-17 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Combination meter assembly
   E135-8 (CANH) - E135-18 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Certification ECU (smart key ECU assembly)*3
   E135-9 (CANH) - E135-19 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Steering control ECU*4
   E135-10 (CANH) - E135-20 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	DLC3

   1. *1: w/ Variable Flow Control Solenoid Valve
      
   2. *2: w/ Tire Pressure Warning System
      
   3. *3: w/ Entry and Start System
      
   4. *4: w/ Variable Gear Ratio Steering System
      

   Result

   Result	Proceed to
   OK	A
   NG (Combination meter assembly CAN main wire)	B
   NG (No. 1 CAN junction connector CAN main wire)	C
   NG (DLC3 CAN branch wires)	D
   NG (ECU or sensor CAN branch wires)	E

1. Reconnect the CAN junction connector.
   

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

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E22-6 (CANH) - E22-14 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

   Text in Illustration

   *a	Front view of DLC3

   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.