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Ignition Switch & Key Unlock Warning System: Inspection

  1. Inspect Ignition Switch Continuity 
    Fig 1: Identifying Ignition Switch Connector Terminals
    G02911720Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    IGNITION SWITCH SPECIFICATIONS

    Switch position Tester connection Specified condition
    LOCK - No continuity
    ACC 1 - 3 Continuity
    ON 1 - 2 - 3 Continuity
    ON 5 - 6 Continuity
    START 1 - 2 Continuity
    START 4 - 5 - 6 Continuity

    If the continuity is not as specified, replace the switch.

  2. Inspect Key Unlock Warning Switch Continuity 
    Fig 2: Identifying Key Unlock Warning Switch Positions & Connector Terminals
    G02911721Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    KEY UNLOCK WARNING SWITCH SPECIFICATIONS

    Switch position Tester connection Specified condition
    OFF (Key removed) - No continuity
    ON (Key set) 1 - 2 Continuity

    If the continuity is not as specified, replace the switch.

  3. Inspect Ignition Relay (Marking: IG1) Continuity 
    Fig 3: Identifying Ignition Relay Terminals
    G02911722Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    IGNITION RELAY SPECIFICATIONS

    Condition Tester connection Specified condition
    Constant 1 - 2 Continuity
    Apply B+ between terminals 1 and 2 3 - 5 Continuity

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

  4. Inspect Accessory Relay (Marking: ACC) Continuity 
    Fig 4: Identifying Accessory Relay Terminals
    G02911723Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ACCESSORY RELAY SPECIFICATION

    Condition Tester connection Specified condition
    Constant 1 - 2 Continuity
    Apply B+ between terminals 1 and 2. 3 - 5 Continuity

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

  5. Inspect Key Unlock Warning Buzzer 
    Fig 5: Identifying Key Unlock Warning Buzzer Chart
    G02911724Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Check the buzzer sound when driver's door is opened and key inserted.

    If the operation is not as specified, replace the combination meter (See REMOVAL ).

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