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Home >> Lexus >> 2012 >> LS 460L AWD >> Repair and Diagnosis >> Suspension >> Suspension Control Systems >> Suspension Control System (Service Information) >> Suspension Control Relay >> On-Vehicle Inspection >> On-Vehicle Inspection

On-Vehicle Inspection

  1. REMOVE COWL TOP VENTILATOR LOUVER RH  . Refer to REMOVAL - Step 1
  2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
    NOTE: w/ Navigation System (for HDD):

    After the engine switch is turned off, the display and navigation module display (HDD navigation system) records various types of memory and settings. As a result, after turning the engine switch off, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) battery terminal.

    Waiting Time before Disconnecting Cable from Negative (-) Battery Terminal

    Condition Waiting Time
    Vehicle enrolled in safety connect system 6 minutes
    Vehicle not enrolled in safety connect system 1 minute
  3. REMOVE SUSPENSION CONTROL RELAY (A/SUS) 
    1. Remove the suspension control relay from the engine room No. 1 relay block.
  4. INSPECT SUSPENSION CONTROL RELAY 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 1: Identifying Suspension Control Relay Circuit Diagram
      GTY289275Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance

      Tester Connection Condition Specified Condition
      3 - 5 When battery voltage is not applied to terminals 1 and 2 10 kΩ or higher
      When battery voltage is applied to terminals 1 and 2 Below 1 Ω

      If the result is not as specified, replace the suspension control relay.

  5. INSTALL SUSPENSION CONTROL RELAY 
  6. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL 
  7. INSTALL COWL TOP VENTILATOR LOUVER RH  . Refer to INSTALLATION - Step 11
  8. PERFORM INITIALIZATION 
    1. Perform initialization. Refer to INITIALIZATION .
      NOTE: Certain systems need to be initialized after disconnecting and reconnecting the cable from the negative (-) battery terminal.
  9. CHECK SRS WARNING LIGHT 
    1. Check the SRS warning light. Refer to DIAGNOSIS SYSTEM .