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. 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 DLC3 
   1. Measure the resistance according to the value(s) in the table below.

      Result 

      RESULT REFERENCE TABLE
      
      

      Tester Connection	Switch Condition	Measured Resistance	Proceed to
      J17-6 (CANH) - J17-14 (CANL)	Ignition switch OFF	54 to 69 Ω	OK
      		69 Ω or higher	NG

      NOTE: When the measured value is 132 Ω or higher and a CAN communication system DTC is output, there may be a problem besides disconnection of the DLC3 branch wire. For that reason, troubleshooting should be performed again from HOW TO PROCEED WITH TROUBLESHOOTING  after repairing the trouble area.
      Fig 1: Identifying J17 DLC3 Connector Terminal

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   OK: Go to Next Step 

3. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - ECM) 
   1. Disconnect the J94 No. 1 junction connector 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
      J94-1 (CANH) - J94-2 (CANL)	Ignition switch OFF	108 to 132 Ω

      Fig 2: Identifying J94 No. 1 Junction Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG:  Go to step  5

   OK: Go to Next Step 

4. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - COMBINATION METER ECU) 
   1. Disconnect the J84 No. 1 junction connector 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
      J84-1 (CANH) - J84-2 (CANL)	Ignition switch OFF	108 to 132 Ω

      Fig 3: Identifying J84 No. 1 Junction Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG:  Go to step  10

   OK: REPLACE NO. 1 JUNCTION CONNECTOR 

5. CONNECT CONNECTOR 
   1. Reconnect the J94 No. 1 junction connector connector.
6. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 JUNCTION CONNECTOR - ECM) 
   1. Disconnect the J92 No. 2 junction connector 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
      J92-1 (CANH) - J92-2 (CANL)	Ignition switch OFF	108 to 132 Ω

      Fig 4: Identifying J92 No. 2 Junction Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG:  Go to step  8

   OK: Go to Next Step 

7. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) 
   1. Disconnect the J93 No. 2 junction connector 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
      J93-1 (CANH) - J93-2 (CANL)	Ignition switch OFF	108 to 132 Ω

      Fig 5: Identifying J93 No. 2 Junction Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   OK: REPLACE NO. 2 JUNCTION CONNECTOR 

8. CONNECT CONNECTOR 
   1. Reconnect the J92 No. 1 junction connector connector.
9. CHECK FOR OPEN IN CAN BUS MAIN WIRE (ECM - NO. 2 JUNCTION CONNECTOR) 
   1. Disconnect the A24 ECM 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
      A24-10 (CANH) - A24-11 (CANL)	Ignition switch OFF	108 to 132 Ω

      Result 

      RESULT REFERENCE TABLE
      
      

      Result	Proceed to
      OK (for 1GR-FE)	A
      OK (for 2UZ-FE)	B
      OK (for 3UR-FE)	C
      NG	D

      Fig 6: Identifying A24 ECM Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   B: REPLACE ECM  (See REMOVAL )

   C: REPLACE ECM  (See REMOVAL )

   D: REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (ECM - NO. 2 JUNCTION CONNECTOR) 

   A: REPLACE ECM  (See REMOVAL )

10. CONNECT CONNECTOR 
    1. Reconnect the J84 No. 1 junction connector connector.
11. CHECK FOR OPEN IN CAN BUS MAIN WIRE (COMBINATION METER ECU - NO. 1 JUNCTION CONNECTOR) 
    1. Disconnect the J28 combination meter ECU 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
       J28-33 (CANH) - J28-34 (CANL)	Ignition switch OFF	108 to 132 Ω

       Fig 7: Identifying J28 Combination Meter ECU Connector Terminals

       Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ECU (COMBINATION METER ECU - NO. 1 JUNCTION CONNECTOR) 

    OK: REPLACE COMBINATION METER ASSEMBLY  (See REMOVAL )