Inspection Procedure

HINT:

When the power 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 steps to wake up the ECU:

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

1. INSPECT STEERING LOCK ECU 
   1. Measure the voltage according to the value(s) in the table below

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition (Steering Lock Position)	Specified Condition
      L33-4 (SLP1) - L33-2 (SGND)	Locked	11 to 14 V
      L33-4 (SLP1) - L33-2 (SGND)	Unlocked	Below 1 V

   Fig 1: Inspecting Steering Lock ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: Go to step 2 

   OK: GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START (HOW TO PROCEED WITH TROUBLESHOOTING)  (See HOW TO PROCEED WITH TROUBLESHOOTING )

2. CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - MAIN BODY ECU) 
   Fig 2: Checking Harness And Connector (Steering Lock ECU - Main Body ECU)

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

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      L33-4 (SLP1) - L13-18 (SLP)	Always	Below 1 Ω
      L33-4 (SLP1) or L13-18 (SLP) - Body ground	Always	10 kΩ or higher

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE STEERING LOCK ACTUATOR (STEERING LOCK ECU)  (See DISASSEMBLY  )