Inspection Procedure

HINT:

• Perform the following inspection for the ECUs (sensors) which are not displayed on the Techstream. If a malfunction cannot be identified, perform the following inspections for the ECUs (sensors) connected to the CAN communication system.
• Do not remove the combination meter and ECM, as they are the end parts of the circuit. If removed, CAN communication will not be possible.
• The open circuit confirmation of the combination meter, ECM and main wire is performed in the CHECK CAN BUS LINE procedure of "HOW TO PROCEED WITH TROUBLESHOOTING". This inspection only has procedures for checking for an open circuit on one side of the CAN branch wire.

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
   1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.
      CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
      NOTE: After the ignition switch is turned OFF, the navigation system requires approximately 90 seconds to record various types of memory and settings. As a result, after turning the ignition switch OFF, wait 90 seconds or more before disconnecting the cable from the negative (-) battery terminal.
2. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (MAIN BODY ECU) 
   1. Disconnect the J2 main body ECU connector.
   2. Reconnect the cable to the negative (-) battery terminal.
   3. Select "CAN Bus Check" on the Techstream.

      Result 

      RESULT REFERENCE TABLE
      
      

      Result	Proceed to
      Main Body not displayed on Techstream.	A
      Several ECUs and sensors other than Main Body not displayed on Techstream.	B

   B:  Go to step  4

   A: Go to next step 

3. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (MAIN BODY ECU BRANCH WIRE) 
   1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATION TABLE
      
      

      Tester Connection	Switch Condition	Specified Condition
      J2-5 (CANH) - J2-6 (CANL)	Ignition switch OFF	54 to 69 Ω

      Fig 1: Identifying J2 Main Body ECU Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (MAIN BODY ECU) 

   OK: REPLACE MAIN BODY ECU 

4. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (SKID CONTROL ECU WITH ACTUATOR) 
   1. Disconnect the A17 skid control ECU with actuator connector.
   2. Reconnect the cable to the negative (-) battery terminal.
   3. Select "CAN Bus Check" on the Techstream.

      Result 

      RESULT REFERENCE TABLE
      
      

      Result	Proceed to
      ABS/VSC/TRAC not displayed on Techstream.	A
      Several ECUs and sensors other than ABS/VSC/TRAC not displayed on Techstream.	B

   B:  Go to step  6

   A: Go to next step 

5. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (SKID CONTROL ECU WITH ACTUATOR BRANCH WIRE) 
   1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATION TABLE
      
      

      Tester Connection	Switch Condition	Specified Condition
      A17-5 (CANH) - A17-4 (CANL)	Ignition switch OFF	54 to 69 Ω

      Fig 2: Identifying A17 Skid Control ECU With Actuator Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (SKID CONTROL ECU WITH ACTUATOR) 

   OK: REPLACE SKID CONTROL ECU WITH ACTUATOR  (See REMOVAL )

6. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (STEERING ANGLE SENSOR) 
   1. Disconnect the J6 steering angle sensor connector.
   2. Reconnect the cable to the negative (-) battery terminal.
   3. Select "CAN Bus Check" on the Techstream.

      Result 

      RESULT REFERENCE
      
      

      Result	Proceed to
      Steering Angle Sensor not displayed on Techstream.	A
      Several ECUs and sensors other than Steering Angle Sensor not displayed on Techstream.	B

   B:  Go to step  8

   A: Go to next step 

7. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (STEERING ANGLE SENSOR BRANCH WIRE) 
   1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATION TABLE
      
      

      Tester Connection	Switch Condition	Specified Condition
      J6-10 (CANH) - J6-9 (CANL)	Ignition switch OFF	54 to 69 Ω

      Fig 3: Identifying J6 Steering Angle Sensor Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (STEERING ANGLE SENSOR) 

   OK: REPLACE STEERING ANGLE SENSOR  (See REMOVAL )

8. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (BUS BUFFER ECU) 
   NOTE: For vehicles without bus buffer ECU, go to step  10.
   1. Disconnect the J59 bus buffer ECU connector.
   2. Reconnect the cable to the negative (-) battery terminal.
   3. Select "CAN Bus Check" on the Techstream.

      Result 

      RESULT REFERENCE TABLE
      
      

      Result	Proceed to
      Accessory Gateway not displayed on Techstream.	A
      Several ECUs and sensors other than Accessory Gateway not displayed on Techstream.	B

   B:  Go to step  10

   A: Go to next step 

9. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (BUS BUFFER ECU BRANCH WIRE) 
   1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATION TABLE
      
      

      Tester Connection	Switch Condition	Specified Condition
      J59-3 (CAN+) - J59-2 (CAN-)	Ignition switch OFF	54 to 69 Ω

      Fig 4: Identifying J59 Bus Buffer ECU Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (BUS BUFFER ECU) 

   OK: REPLACE BUS BUFFER ECU 

10. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (CENTER AIRBAG SENSOR) 
    1. Disconnect the J46 center airbag sensor connector.
    2. Reconnect the cable to the negative (-) battery terminal.
    3. Select "CAN Bus Check" on the Techstream.

       Result 

       RESULT REFERENCE TABLE
       
       

       Result	Proceed to
       SRS Airbag not displayed on Techstream.	A
       Several ECUs and sensors other than SRS Airbag not displayed on Techstream.	B

    B:  Go to step  12

    A: Go to next step 

11. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (CENTER AIRBAG SENSOR BRANCH WIRE) 
    1. Measure the resistance according to the value(s) in the table below.

       Standard resistance 

       STANDARD RESISTANCE SPECIFICATION TABLE
       
       

       Tester Connection	Switch Condition	Specified Condition
       J46-13 (CANH) - J46-22 (CANL)	Ignition switch OFF	54 to 69 Ω

       Fig 5: Identifying J46 Center Airbag Sensor Connector

       Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (CENTER AIRBAG SENSOR) 

    OK: REPLACE CENTER AIRBAG SENSOR  (See REMOVAL )

12. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (4WD CONTROL ECU) 
    NOTE: For vehicles without 4WD, go to step  14.
    1. Disconnect the A25 4WD control ECU connector.
    2. Reconnect the cable to the negative (-) battery terminal.
    3. Select "CAN Bus Check" on the Techstream.

       Result 

       RESULT REFERENCE
       
       

       Result	Proceed to
       Four Wheel Drive Control not displayed on Techstream.	A
       Several ECUs and sensors other than Four Wheel Drive Control not displayed on Techstream.	B

    B:  Go to step  14

    A: Go to next step 

13. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (4WD CONTROL ECU BRANCH WIRE) 
    1. Measure the resistance according to the value(s) in the table below.

       Standard resistance 

       STANDARD RESISTANCE SPECIFICATION TABLE
       
       

       Tester Connection	Switch Condition	Specified Condition
       A25-19 (CANH) - A25-20 (CANL)	Ignition switch OFF	54 to 69 Ω

       Fig 6: Identifying A25 4WD Control ECU Connector

       Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (4WD CONTROL ECU) 

    OK: REPLACE 4WD CONTROL ECU  (See REMOVAL )

14. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (AIR CONDITIONING AMPLIFIER BRANCH WIRE) 
    1. Disconnect the J19 air conditioning amplifier connector.
    2. Measure the resistance according to the value(s) in the table below.

       Standard resistance 

       STANDARD RESISTANCE SPECIFICATION TABLE
       
       

       Tester Connection	Switch Condition	Specified Condition
       J19-11 (CANH) - J19-12 (CANL)	Ignition switch OFF	54 to 69 Ω

       Fig 7: Identifying J19 Air Conditioning Amplifier Connector

       Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (AIR CONDITIONING AMPLIFIER) 

    OK: REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY  (See REMOVAL )