DTC B2788: IG2 Signal Malfunction [09/2014 - 10/2015]: Procedure

1. Make sure that there is no looseness at the locking part and the connecting part of the connector.
2. Disconnect the steering lock ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   N24-1 (GND) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Steering Lock ECU (Steering Lock Actuator Assembly))

4. Reconnect the steering lock ECU connector.
5. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   N24-6 (IG2) - N24-1 (GND)	Engine switch on (IG)	11 to 14 V
   N24-6 (IG2) - N24-1 (GND)	Engine switch off	Below 1 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Steering Lock ECU (Steering Lock Actuator Assembly))

Result: 

OK 

REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) 

(Refer to DISASSEMBLY [09/2014 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR