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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 disable the SRS system.
    NOTE:
    • w/ Navigation System:

      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.

    Result 

    TESTER CONNECTION SPECIFIED CONDITION CHART

    Tester Connection Switch Condition Measured Resistance Proceed to
    E22-6 (CANH) - E22-14 (CANL) Engine switch off 108 to 132 Ω OK
    E22-6 (CANH) - E22-14 (CANL) Engine switch off 132 Ω or higher NG
    Fig 1: Identifying DLC3 Connector Terminals
    G05639567Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE: When the measured value is 132 Ω or higher and a CAN communication system diagnostic trouble code is output, there may be a fault besides disconnection of the DLC3 branch wire. For that reason, troubleshooting should be performed again from "How to Proceed with Troubleshooting" (See 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 E69 No. 2 junction connector connector.
    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
    E69-1 (CANH) - E69-12 (CANL) Engine switch off 108 to 132 Ω
    Fig 2: Identifying E69 No. 2 Junction Connector Terminals
    G05639557Courtesy 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. 2 JUNCTION CONNECTOR - COMBINATION METER) 
    1. 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
    E69-4 (CANH) - E69-15 (CANL) Engine switch off 108 to 132 Ω
    Fig 3: Identifying E69 No. 2 Junction Connector Terminals
    G05639558Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG:  Go to step  10

    OK: REPLACE NO. 2 JUNCTION CONNECTOR 

  5. CONNECT CONNECTOR 
    1. Reconnect the E69 No. 2 junction connector connector.
  6. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - ECM) 
    1. Disconnect the E72 No. 1 junction connector connector.
    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
    E72-2 (CANH) - E72-13 (CANL) Engine switch off 108 to 132 Ω
    Fig 4: Identifying E72 No. 1 Junction Connector Terminals
    G05639559Courtesy 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. 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
    E72-1 (CANH) - E72-12 (CANL) Engine switch off 108 to 132 Ω
    Fig 5: Identifying E72 No. 1 Junction Connector Terminals
    G05639560Courtesy 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. 1 JUNCTION CONNECTOR 

  8. CONNECT CONNECTOR 
    1. Reconnect the E72 No. 1 junction connector connector.
  9. CHECK FOR OPEN IN CAN BUS MAIN WIRE (ECM - NO. 1 JUNCTION CONNECTOR) 
    1. Disconnect the A38 ECM connector.
    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
    A38-10 (CANH) - A38-11 (CANL) Engine switch off 108 to 132 Ω
    Fig 6: Identifying A38 ECM Connector Terminals
    G05639561Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    OK: REPLACE ECM  (See ECM )

  10. CONNECT CONNECTOR 
    1. Reconnect the E69 No. 2 junction connector connector.
  11. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 3 JUNCTION CONNECTOR - COMBINATION METER) 
    1. Disconnect the E75 No. 3 junction connector connector.
    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
    E75-3 (CANH) - E75-14 (CANL) Engine switch off 108 to 132 Ω
    Fig 7: Identifying E75 No. 3 Junction Connector Terminal
    G05639562Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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 JUNCTION CONNECTOR) 
    1. 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
    E75-1 (CANH) - E75-12 (CANL) Engine switch off 108 to 132 Ω
    Fig 8: Identifying E75 No. 3 Junction Connector Terminal
    G05639563Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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 E75 No. 3 junction connector connector.
  14. CHECK FOR OPEN IN CAN BUS MAIN WIRE (COMBINATION METER - NO. 3 JUNCTION CONNECTOR) 
    1. Disconnect the E77 combination meter connector.
    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
    E77-36 (CANH) - E77-35 (CANL) Engine switch off 108 to 132 Ω
    Fig 9: Checking For Open In CAN Bus Main Wire (Combination Meter - No. 3 Junction Connector)
    G05765164Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER (COMBINATION METER - NO. 3 JUNCTION CONNECTOR) 

    OK: REPLACE COMBINATION METER ASSEMBLY  (See REMOVAL )

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