Headlight Dimmer Switch Inspection

Body Electrical. Lexus Is250, Is220D. Gse20 Ale20
Lighting. Lexus Is250, Is220D. Gse20 Ale20

  1. REMOVE HEADLIGHT DIMMER SWITCH ASSEMBLY

Headlight Dimmer Switch -- Inspection



1. REMOVE HEADLIGHT DIMMER SWITCH ASSEMBLY


    Lexus Is250, Is220D. Gse20 Ale20.Lighting.Lighting System.Headlight Dimmer Switch  Inspection
  1. Measure the resistance according to the value(s) in the tables below.

    Standard resistance:
    Light Control Switch (LHD, RHD light control switch LH side type):
    Tester Connection
    Switch Condition
    Specified Condition
    f1-12 (EL) - f1-18 (T)
    OFF
    10 kΩ or higher
    f1-18 (T) - f1-19 (AUTO)
    OFF
    10 kΩ or higher
    f1-19 (AUTO) - f1-20 (H)
    OFF
    10 kΩ or higher
    f1-12 (EL) - f1-18 (T)
    TAIL
    Below 1 Ω
    f1-12 (EL) - f1-18 (T)
    HEAD
    Below 1 Ω
    f1-18 (T) - f1-20 (H)
    HEAD
    Below 1 Ω
    f1-12 (EL) - f1-19 (AUTO)
    AUTO
    Below 1 Ω
    Light Control Switch (RHD light control switch RH side type):
    Tester Connection
    Switch Condition
    Specified Condition
    f1-19 (EL) - f1-13 (T)
    OFF
    10 kΩ or higher
    f1-13 (T) - f1-12 (AUTO)
    OFF
    10 kΩ or higher
    f1-12 (AUTO) - f1-11 (H)
    OFF
    10 kΩ or higher
    f1-19 (EL) - f1-13 (T)
    TAIL
    Below 1 Ω
    f1-19 (EL) - f1-13 (T)
    HEAD
    Below 1 Ω
    f1-13 (T) - f1-11 (H)
    HEAD
    Below 1 Ω
    f1-19 (EL) - f1-12 (AUTO)
    AUTO
    Below 1 Ω
    Headlight Dimmer Switch (LHD, RHD light control switch LH side type):
    Tester Connection
    Switch Condition
    Specified Condition
    f1-11 (HU) - f1-12 (EL)
    LOW BEAM
    Below 1 Ω
    f1-11 (HU) - f1-12 (EL)
    HI BEAM
    Below 1 Ω
    f1-12 (EL) - f1-17 (HF)
    HI BEAM
    Below 1 Ω
    Headlight Dimmer Switch (RHD light control switch RH side type):
    Tester Connection
    Switch Condition
    Specified Condition
    f1-15 (HU) - f1-19 (EL)
    LOW BEAM
    Below 1 Ω
    f1-15 (HU) - f1-19 (EL)
    HI BEAM
    Below 1 Ω
    f1-19 (EL) - f1-14 (HF)
    HI BEAM
    Below 1 Ω
    Turn Signal Switch (LHD, RHD light control switch LH side type):
    Tester Connection
    Switch Condition
    Specified Condition
    f1-12 (EL) - f1-13 (TR)
    Right turn
    Below 1 Ω
    f1-12 (EL) - f1-13 (TR)
    Neutral
    10 kΩ or higher
    f1-12 (EL) - f1-15 (TL)
    Neutral
    10 kΩ or higher
    f1-12 (EL) - f1-15 (TL)
    Left turn
    Below 1 Ω
    Turn Signal Switch (RHD light control switch RH side type):
    Tester Connection
    Switch Condition
    Specified Condition
    f1-19 (EL) - f1-16 (TR)
    Right turn
    Below 1 Ω
    f1-19 (EL) - f1-16 (TR)
    Neutral
    10 kΩ or higher
    f1-19 (EL) - f1-18 (TL)
    Neutral
    10 kΩ or higher
    f1-19 (EL) - f1-18 (TL)
    Left turn
    Below 1 Ω
    Fog Light Switch (LHD, RHD light control switch LH side type):
    Tester Connection
    Switch Condition
    Specified Condition
    f1-3 (LFG) - f1-4 (BFG)
    OFF
    10 kΩ or higher
    f1-4 (BFG) - f1-2 (B)
    OFF
    10 kΩ or higher
    f1-3 (LFG) - f1-2 (B)
    OFF
    10 kΩ or higher
    f1-3 (LFG) - f1-4 (BFG)
    Front fog light switch ON
    Below 1 Ω
    f1-3 (LFG) - f1-4 (BFG)
    Rear fog light switch ON
    Below 1 Ω
    f1-4 (BFG) - f1-2 (B)
    Rear fog light switch ON
    Below 1 Ω
    f1-3 (LFG) - f1-2 (B)
    Rear fog light switch ON
    Below 1 Ω
    Fog Light Switch (RHD light control switch RH side type):
    Tester Connection
    Switch Condition
    Specified Condition
    f1-8 (LFG) - f1-7 (BFG)
    OFF
    10 kΩ or higher
    f1-7 (BFG) - f1-9 (RFG)
    OFF
    10 kΩ or higher
    f1-8 (LFG) - f1-9 (RFG)
    OFF
    10 kΩ or higher
    f1-8 (LFG) - f1-7 (BFG)
    Front fog light switch ON
    Below 1 Ω
    f1-8 (LFG) - f1-7 (BFG)
    Rear fog light switch ON
    Below 1 Ω
    f1-7 (BFG) - f1-9 (RFG)
    Rear fog light switch ON
    Below 1 Ω
    f1-8 (LFG) - f1-9 (RFG)
    Rear fog light switch ON
    Below 1 Ω
    If the result is not as specified, replace the headlight dimmer switch assembly.