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Home >> Lexus >> 2008 >> SC 430 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> Ignition Relay No. 2 >> On-Vehicle Inspection
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On-Vehicle Inspection

  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    CAUTION: 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.

    Standard resistance 

    TESTER CONNECTION SPECIFIED CONDITION CHART

    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.

    Fig 1: IG2 Relay Circuit Diagram
    G04943127Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSTALL IG2 RELAY 
  5. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL 
  6. PERFORM INITIALIZATION 
    1. Perform initialization (see INITIALIZATION ).
    NOTE: Certain systems need to be initialized after disconnecting and reconnecting the cable from the negative (-) battery terminal.
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