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Home >> Scion >> 2005 >> xA Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Steering Column Switches >> Abs With EBD & BA & TRAC & VSC System >> DTC C1203/53: ECM Communication Circuit Malfunction >> Inspection Procedure

Inspection Procedure

  1. CHECK WIRE HARNESS (ECM - SKID CONTROL ECU) 
    1. Disconnect the skid control connector and ECM connector.
    2. Measure the resistance according to the table below.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      E6-25 (VSC+) - S1-8 (TRC+) Below 1 Ω
      E6-24 (ENG+) - S1-9 (ENG+) Below 1 Ω
      E6-31 (VSC-) - S1-22 (TRC-) Below 1 Ω
      E6-30 (ENG-) - S1-23 (ENG-) Below 1 Ω
      E6-25 (VSC+) - Body ground 10 kΩ or higher
      E6-24 (ENG+) - Body ground 10 kΩ or higher
      E6-31 (VSC-) - Body ground 10 kΩ or higher
      E6-30 (ENG-) - Body ground 10 kΩ or higher
      Fig 1: Disconnecting Skid Control Connector & ECM Connector
      G03196469Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK : GO TO NEXT STEP. 
  2. CHECK WIRE HARNESS (ECM - BODY GROUND) 
    1. Disconnect ECM connector.
    2. Measure the resistance according to the table below.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      E4-7 (E1) - Body ground Below 1 Ω
      Fig 2: Disconnecting ECM Connector
      G03196470Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK : REPLACE ECM 
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