Inspection Procedure

HINT:

When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following step to wake up the ECU:

With the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals.

1. CHECK DTC (CERTIFICATION ECU) 
   1. Check the DTCs (See DTC CHECK / CLEAR  ).

      OK: DTC B2782 is output, but DTC B2785 (LIN bus line malfunction) is not output. 

   NG: GO TO DTC CHART (B2785)  (See DTC B2785 COMMUNICATION MALFUNCTION BETWEEN ECUS CONNECTED BY LIN )

   OK: Go to next step 

2. CHECK STEERING LOCK ACTUATOR (IGE VOLTAGE) 
   1. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester Connection	Switch Condition	Specified Condition
      L33-3 (IGE) - L33-2 (SGND)	Engine switch on (IG) (When steering lock motor is operating)	Below 1 V
      	Engine switch on (IG) (When steering lock motor is not operating)	11 to 14 V

      Fig 1: Identifying L33 Steering Lock Actuator Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      When the steering lock is activated and the engine switch is turned on (IG), the steering lock motor activates to release the steering lock. The motor operation occurs for 2 to 15 seconds.

   OK: REPLACE STEERING LOCK ACTUATOR 

   NG: Go to next step 

3. CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR - BODY GROUND) 
   1. Disconnect the L33 steering lock actuator connector.
   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      L33-2 (SGND) - Body ground	Always	Below 1 Ω

      Fig 2: Identifying L33 Steering Lock Actuator Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

4. CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR - MAIN BODY ECU) 
   Fig 3: Identifying L13 Main Body ECU And L33 Steering Lock Actuator Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the L13 main body ECU connector.
   2. Disconnect the L33 steering lock actuator connector.
   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      L33-3 (IGE) - L13-19 (SLR+)	Always	Below 1 Ω
      L33-3 (IGE) or L13-19 (SLR+) - Body ground	Always	10 kΩ or higher

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE MAIN BODY ECU