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DTC B2788: IG2 Signal Malfunction: Procedure

  1. INSPECT STEERING LOCK ECU 
    Fig 1: Identifying Steering Lock ECU Connector Terminals
    GTY244349Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      6 (IG2) - 1 (GND) Engine switch off Below 1 V
      6 (IG2) - 1 (GND) Engine switch on (IG) 11 to 14 V

    NG → INSPECT IG2 RELAY CIRCUIT 

    OK → See step   2 

  2. REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU). Refer to  REMOVAL