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Home >> Scion >> 2005 >> xA Standard >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Can Communication System >> Check Can Bus Lines For Short Circuit >> Inspection Procedure

Inspection Procedure

  1. CHECK CAN BUS LINES FOR SHORT (DLC3 SUB BUS LINE) 
    1. Disconnect the J10 junction connector.
    2. Measure the resistance according to DLC3 SUB BUS LINE  .

      Standard: 

      DLC3 SUB BUS LINE

      Tester Connection Condition Specified Condition
      D1-6 (CANH) - D1-14 (CANL) Ignition switch OFF 1 MΩ or higher
      Fig 1: Checking CAN Bus Lines For Short (DLC3 Sub Bus Line)
      G03196955Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE DLC3 SUB BUS LINE OR CONNECTOR (CANH, CANL) 
    2. OK : GO TO NEXT STEP. 
  2. CHECK CAN BUS LINES FOR SHORT (SKID CONTROL ECU - JUNCTION CONNECTOR) 
    1. Disconnect the S1 skid control ECU connector.
    2. Measure the resistance according to SKID CONTROL ECU - JUNCTION CONNECTOR  .

      Standard: 

      SKID CONTROL ECU - JUNCTION CONNECTOR

      Tester connection Condition Specified Condition
      S1-11 (CANH) - S1-25 (CANL) Ignition switch OFF 1 MΩ or higher

      HINT:

      Check the wire harness of the connector that was connected to the junction connector.

      Fig 2: Checking CAN Bus Lines For Short (Skid Control ECU - Junction Connector)
      G03196956Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (SKID CONTROL ECU - JUNCTION CONNECTOR) 
    2. OK : GO TO NEXT STEP. 
  3. INSPECT SKID CONTROL ECU WITH ACTUATOR (CANH - CANL) 
    1. Measure the resistance according to CANH - CANL  .

      Standard: 

      SKID CONTROL ECU WITH ACTUATOR (CANH - CANL)

      Tester Connection Condition Specified Condition
      11 (CANH) - 25 (CANL) Ignition switch OFF 108 to 132 Ω.
      Fig 3: Inspecting Control ECU With Actuator (CANH - CANL)
      G03196957Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPLACE SKID CONTROL ECU WITH ACTUATOR (See  REPLACEMENT  ) 
    2. OK : GO TO NEXT STEP. 
  4. CHECK CAN BUS LINES FOR SHORT (STEERING SENSOR - JUNCTION CONNECTOR) 
    1. Disconnect the S15 steering sensor connector.
    2. Measure the resistance according to STEERING SENSOR - JUNCTION CONNECTOR  .

      Standard: 

      STEERING SENSOR - JUNCTION CONNECTOR

      Tester connection Condition Specified Condition
      S15-10 (CANH) - S15-9 (CANL) Ignition switch OFF 1 MΩ or higher

      HINT:

      Check the wire harness of the connector that was connected to the junction connector.

      Fig 4: Checking CAN Bus Lines For Short (Steering Sensor - Junction Connector)
      G03196958Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (STEERING SENSOR - JUNCTION CONNECTOR) 
    2. OK : GO TO NEXT STEP. 
  5. INSPECT STEERING SENSOR (CANH - CANL) 
    1. Measure the resistance according to STEERING SENSOR (CANH - CANL)  .

      Standard: 

      STEERING SENSOR (CANH - CANL)

      Tester Connection Condition Specified Condition
      10 (CANH) - 9 (CANL) Ignition switch OFF 108 to 132 Ω.
      Fig 5: Inspecting Steering Sensor (CANH - CANL)
      G03196959Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPLACE STEERING SENSOR (See  STEERING SENSOR (W/ VSC)  ) 
    2. OK : GO TO NEXT STEP. 
  6. CHECK CAN BUS LINES FOR SHORT (YAW RATE SENSOR SUB BUS LINE) 
    1. Disconnect the Y1 yaw rate sensor connector.
    2. Measure the resistance according to CAN BUS LINES FOR SHORT (YAW RATE SENSOR SUB BUS LINE)  .

      Standard: 

      CAN BUS LINES FOR SHORT (YAW RATE SENSOR SUB BUS LINE)

      Tester Connection Condition Specified Condition
      Y1-3 (CANH) - Y1-2 (CANL) Ignition switch OFF 1 MΩ or higher

      HINT:

      Check the wire harness of the connector that was connected to the junction connector.

      Fig 6: Checking CAN Bus Lines For Short (Yaw Rate Sensor Sub Bus Line)
      G03196960Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE YAW RATE SENSOR SUB BUS LINE OR CONNECTOR (CANH, CANL) 
    2. OK : REPLACE YAW RATE SENSOR (See  YAW RATE SENSOR (W/ VSC)  ) 
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