Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Diagnosis System
DIAGNOSIS SYSTEM
CHECK DLC3
(a) Check the DLC3.
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FUNCTION OF PASSENGER AIRBAG ON/OFF INDICATOR
(a) Initial check
(1) Turn the engine switch on (IG).
(2) The passenger airbag ON/OFF indicator comes on for approximately 4 seconds, then goes off for approximately 2 seconds.
(3) Approximately 6 seconds after the engine switch is turned on (IG), the passenger airbag ON/OFF indicator will indicate ON/OFF depending on the following conditions.
Indicator Operation| Front Passenger Seat Condition | Passenger Airbag ON/OFF Indicator | SRS Warning Light | |
|---|---|---|---|
| ON Indicator | OFF Indicator | ||
| Vacant | OFF | ON | OFF |
| Adult*1 is seated | ON | OFF | OFF |
| Child*2 is seated | ON or OFF*2 | OFF or ON*2 | OFF |
| Child restraint system is installed | OFF | ON | OFF |
| Occupant classification system failure | OFF | ON | ON |
- *1: The system judges a person of average adult weight or more as an adult. If a smaller adult sits in the front passenger seat, the system may not recognize them as an adult depending on their physique and posture.
- *2: The system may not recognize a child or a child in a child restrain system as a child depending on factors such as the positioning of the child restraint system or the child's physique or posture.
HINT:
- The passenger airbag ON/OFF indicator illuminates based on the following timing chart in order to check the indicator light circuit.
- When the occupant classification system has a malfunction, both the SRS warning light and passenger airbag ON/OFF indicator ("OFF") come on. In this case, check for airbag system DTCs first.
PASSENGER AIRBAG ON/OFF INDICATOR CHECK
(a) Turn the engine switch on (IG).
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| *A | Type A |
| *B | Type B |
(b) Check that the passenger airbag ON/OFF indicator ("ON" and "OFF") comes on for approximately 4 seconds, then goes off for approximately 2 seconds.
HINT:
Refer to the indicator operation table in Function of Passenger Airbag ON/OFF Indicator for the passenger airbag ON/OFF indicator operation when the engine switch is turned on (IG) and approximately 6 seconds elapse.
Terminals Of Ecu
TERMINALS OF ECU OCCUPANT DETECTION ECU Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition b10-1 (SVC1) - b10-5 (SGD1) R - G Front occupant class ...
Dtc Check / Clear
DTC CHECK / CLEAR DTC CHECK (a) Turn the engine switch off. (b) Connect the Techstream to the DLC3. (c) Turn the engine switch on (IG), and wait for at least 10 seconds. (d) Turn the Techstream on. (e ...
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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