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Home >> Lexus >> 2009 >> SC 430 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (Service Information) >> Ignition Relay No. 2 >> On-Vehicle Inspection >> On-Vehicle Inspection (To 10/2008)
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On-Vehicle Inspection (To 10/2008)

  1. 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.

  2. REMOVE IG2 RELAY 
    1. Remove the engine room No. 1 relay block cover.
    2. Remove the IG2 relay from the engine room No. 1 relay block.
  3. INSPECT IG2 RELAY 
    1. Measure the resistance of the IG2 relay.
      Fig 1: Inspecting Circuit Opening Relay
      GTY138828Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance

      Tester Connection Specified Condition
      3 - 5 10 kΩ or higher
      3 - 5 Below 1 Ω
      (when battery voltage is applied to terminals 1 and 2)

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

  4. INSTALL IG2 RELAY 
  5. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL 
  6. 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.

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