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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. 1 >> 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 IG1 RELAY 
    1. Remove the IG1 relay from the instrument panel junction block.
  3. INSPECT RELAY 
    1. Measure resistance of the IG1 relay.
      Fig 1: Inspecting IG1 Relay
      GTY145125Courtesy 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 IG1 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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