Seat Belt Warning System Terminals Of Ecu

Restraints. Lexus Gs430, Gs300. Uzs190 Grs190
Seat Belt. Lexus Gs430, Gs300. Uzs190 Grs190

  1. CHECK COMBINATION METER ASSEMBLY

  1. CHECK MULTI-DISPLAY

  1. CENTER AIRBAG SENSOR ASSEMBLY

Seat Belt Warning System -- Terminals Of Ecu



CHECK COMBINATION METER ASSEMBLY

Lexus Gs430, Gs300. Uzs190 Grs190.Seat Belt.Seat Belt Tension Reducer.Seat Belt Warning System Terminals Of Ecu

  1. Disconnect the L31 meter connector.

  2. Measure the voltage and resistance of the wire harness side connector.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    IG+ (L31-1) - E2 (L31-40)
    		R - W-B
    		Engine switch signal
    		Engine switch off
    		Below 1 V
    IG+ (L31-1) - E2 (L31-40)
    		R - W-B
    		Engine switch signal
    		Engine switch on (IG)
    		10 to 14 V
    B (L31-21) - Body ground
    		B - Body ground
    		Battery
    		Always
    		10 to 14 V
    E2 (L31-40) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the L31 meter connector.

  4. Measure the voltage of the connectors.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    PBLT (L31-31) - Body ground
    		SB*1, O*2 - Body ground
    		Seat belt warning light signal (passenger side)
    		Passenger seat is occupied and its seat belt is unfastened
    		Alternating between 10 to 14 V and below 1 V
    PBLT (L31-31) - Body ground
    		SB*1, O*2 - Body ground
    		Seat belt warning light signal (passenger side)
    		Passenger seat is occupied and its seat belt is fastened
    		Below 1 V
    (f1-6) - Body ground
    		-
    		Seat belt warning light signal (driver side)
    		Driver seat belt is unfastened
    		10 to 14 V
    (f1-6) - Body ground
    		-
    		Seat belt warning light signal (driver side)
    		Driver seat belt is fastened
    		Below 1 V
    HINT:
    *1: LHD
    *2: RHD
    If the result is not as specified, the combination meter may have a malfunction.

CHECK MULTI-DISPLAY

Lexus Gs430, Gs300. Uzs190 Grs190.Seat Belt.Seat Belt Tension Reducer.Seat Belt Warning System Terminals Of Ecu

  1. Disconnect the L46 multi-display connector.

  2. Measure the voltage and resistance of the wire harness side connector.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    IG (L46-3) - GND1 (L46-10)
    		B - W-B
    		Engine switch signal
    		Engine switch off
    		Below 1 V
    IG (L46-3) - GND1 (L46-10)
    		B - W-B
    		Engine switch signal
    		Engine switch on (IG)
    		10 to 14 V
    +B1 (L46-1) - Body ground
    		O - Body ground
    		Battery
    		Always
    		10 to 14 V
    GND1 (L46-10) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the L46 multi-display connector.

  4. Measure the voltage of the connector.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    PBEW (L48-8) - Body ground
    		V*1, SB*2 - Body ground
    		Seat belt warning light signal (passenger side)
    		Passenger seat is occupied and its seat belt is unfastened
    		Alternating between 10 to 14 V and below 1 V
    PBEW (L48-8) - Body ground
    		V*1, SB*2 - Body ground
    		Seat belt warning light signal (passenger side)
    		Passenger seat is occupied and its seat belt is fastened
    		Below 1 V
    HINT:
    *1: LHD
    *2: RHD
    If the result is not as specified, the multi-display may have a malfunction.

CENTER AIRBAG SENSOR ASSEMBLY

Lexus Gs430, Gs300. Uzs190 Grs190.Seat Belt.Seat Belt Tension Reducer.Seat Belt Warning System Terminals Of Ecu


Symbols (Terminal No.)
Destination
LBE- (W16-23)
Front Seat Inner Belt Assembly LH (Buckle Switch)
LBE+ (W16-15)
Front Seat Inner Belt Assembly LH (Buckle Switch)
RBE- (V13-18)
Front Seat Inner Belt Assembly RH (Buckle Switch)
RBE+ (V13-10)
Front Seat Inner Belt Assembly RH (Buckle Switch)
FSR- (V13-17)*1
Front Seat Inner Belt Assembly RH*1 (Occupant Detection Sensor)
FSR+ (V13-9)*1
Front Seat Inner Belt Assembly RH*1 (Occupant Detection Sensor)
FSL- (W16-24)*2
Front Seat Inner Belt Assembly LH*2 (Occupant Detection Sensor)
FSL+ (W16-16)*2
Front Seat Inner Belt Assembly LH*2 (Occupant Detection Sensor)
HINT:
*1: LHD
*2: RHD