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Inspection Procedure

HINT:

Operating the engine 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 engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
      • When disconnecting the cable, some systems need to be initialized after the cable is reconnected (see INITIALIZATION ).
  2. CHECK DLC3 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 1: Identifying L31 Connector Terminals
      G04953654Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      RESULT REFERENCE CHART

      Tester Connection Switch Condition Measured Resistance Proceed to
      L31-6 (CANH) - L31-14 (CANL) Engine switch off 108 to 132 Ω OK
      L31-6 (CANH) - L31-14 (CANL) Engine switch off 132 Ω or higher NG
      NOTE: When the measured value is 132 Ω or higher and a CAN communication system diagnostic trouble code is output, there may be fault 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.

    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. 2 JUNCTION CONNECTOR - ECM) 
    1. Disconnect the L97 No. 2 junction connector connector.
      Fig 2: Identifying L97 No.2 Junction Connector Terminals
      G04953655Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      L97-4 (CANH) - L97-15 (CANL) Engine switch off 108 to 132 Ω

    NG: Go to step   5 

    OK: GO TO NEXT STEP 

  4. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 3: Identifying L97 No.2 Junction Connector Terminals
      G04953656Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      L97-1 (CANH) - L97-12 (CANL) Engine switch off 108 to 132 Ω

    NG: Go to step   10 

    OK: REPLACE NO. 2 JUNCTION CONNECTOR 

  5. CONNECT CONNECTOR 
    1. Reconnect the L97 No. 2 junction connector connector.
  6. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - ECM) 
    1. Disconnect the A67 No. 1 junction connector connector.
      Fig 4: Identifying A67 No 1 Junction Connector Terminals
      G04953657Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      A67-9 (CANH) - A67-20 (CANL) Engine switch off 108 to 132 Ω

    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. Measure the resistance according to the value(s) in the table below.
      Fig 5: Identifying A67 No 1 Junction Connector Terminals
      G04953658Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      A67-11 (CANH) - A67-22 (CANL) Engine switch off 108 to 132 Ω

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

    OK: REPLACE NO. 1 JUNCTION CONNECTOR 

  8. CONNECT CONNECTOR 
    1. Reconnect the A67 No. 1 junction connector connector.
  9. CHECK FOR OPEN IN CAN BUS MAIN WIRE (ECM - NO. 1 JUNCTION CONNECTOR) 
    1. Disconnect the A13 ECM connector.
      Fig 6: Identifying A13 ECM Connector
      G04953659Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      A13-14 (CANH) - A13-13 (CANL) Engine switch off 108 to 132 Ω

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

    OK: REPLACE ECM  (See REMOVAL )

  10. CONNECT CONNECTOR 
    1. Reconnect the L97 No. 2 CAN junction connector connector.
  11. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 3 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR) 
    1. Disconnect the L98 No. 3 junction connector connector.
      Fig 7: Identifying L98 No 3 Junction Connector Terminals
      G04953660Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      L98-8 (CANH) - L98-19 (CANL) Engine switch off 108 to 132 Ω

    NG: Go to step   13 

    OK: GO TO NEXT STEP 

  12. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 JUNCTION CONNECTOR - NO. 3 CAN JUNCTION CONNECTOR) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 8: Identifying L98 No 3 Junction Connector Terminals
      G04953661Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      L98-7 (CANH) - L98-18 (CANL) Engine switch off 108 to 132 Ω

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

    OK: REPLACE NO. 3 JUNCTION CONNECTOR 

  13. CONNECT CONNECTOR 
    1. Reconnect the L98 No. 3 junction connector connector.
  14. CHECK FOR OPEN IN CAN BUS MAIN WIRE (CENTER AIRBAG SENSOR - NO. 3 JUNCTION CONNECTOR) 
    1. Disconnect the L73 center airbag sensor connector.
      Fig 9: Identifying L73 Center Airbag Sensor Connector
      G04953662Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      L73-13 (CANH) - L73-22 (CANL) Engine switch off 108 to 132 Ω

    NG: REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO CENTER AIRBAG SENSOR (CENTER AIRBAG SENSOR - NO. 3 JUNCTION CONNECTOR) 

    OK: REPLACE CENTER AIRBAG SENSOR ASSEMBLY  (See REMOVAL )

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