Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT DRIVER SEAT BELT WARNING LIGHT

HINT:

The seat belt warning light on the combination meter assembly is used for both the driver seat and front passenger seat.

(a) Turn the engine switch on (IG).

(b) When the driver seat belt is not fastened, check that the seat belt warning light on the combination meter assembly blinks for 6 seconds.

Check that the seat belt warning light on the combination meter assembly changes from blinking to illuminated.

(c) Lift the vehicle using a swing arm type lift.

Click here

(d) Start the engine.

(e) Check the state of the seat belt warning light on the combination meter assembly under the following conditions:

(1) Step 1:

When the driver seat belt is not fastened, the shift lever is in any position other than P and the parking brake is released, check that the seat belt warning light on the combination meter assembly blinks.

(2) Step 2:

When the driver seat belt is not fastened and the vehicle is driven at approximately 20 km/h (12 mph) or more, check that the seat belt warning light on the combination meter assembly blinks.

After 2 minutes, check that the seat belt warning light on the combination meter assembly changes from blinking to illuminated.

(3) Step 3:

Starting from step 1 with the seat belt warning light on the combination meter assembly blinking, when the shift lever is moved to P, check that the seat belt warning light on the combination meter assembly changes from blinking to illuminated.

(4) Step 4:

Starting from step 1 with the seat belt warning light on the combination meter assembly blinking, when the parking brake is applied, check that the seat belt warning light on the combination meter assembly changes from blinking to illuminated.

(5) Step 5:

Starting from step 1 with the seat belt warning light on the combination meter assembly blinking, when the driver seat belt is fastened, check that the seat belt warning light on the combination meter assembly turns off.

2. INSPECT FRONT PASSENGER SEAT BELT WARNING LIGHT

HINT:

The seat belt warning light on the combination meter assembly is used for both the driver seat and front passenger seat.

(a) Place a weight of 20 kg (44.0 lb) on the front passenger seat.

NOTICE:

Place the weight on the seat cushion and allow it to come into contact with the seatback.

(b) Fasten the driver seat belt.

(c) Turn the engine switch on (IG).

(d) When the front passenger seat belt is not fastened with the front passenger seat occupied, check that the seat belt warning light on the combination meter assembly blinks for 6 seconds.

Check that the seat belt warning light on the combination meter assembly changes from blinking to illuminated.

(e) Lift the vehicle using a swing arm type lift.

Click here

(f) Start the engine.

(g) Check the state of the seat belt warning light on the combination meter assembly under the following conditions:

(1) Step 1:

When the front passenger seat belt is not fastened, the shift lever is in any position other than P and the parking brake is released, check that the seat belt warning light on the combination meter assembly blinks.

(2) Step 2:

When the front passenger seat belt is not fastened and the vehicle is driven at approximately 20 km/h (12 mph) or more, check that the seat belt warning light on the combination meter assembly blinks.

After 2 minutes, check that the seat belt warning light on the combination meter assembly changes from blinking to illuminated.

(3) Step 3:

Starting from step 1 with the seat belt warning light on the combination meter assembly blinking, when the shift lever is moved to P, check that the seat belt warning light on the combination meter assembly changes from blinking to illuminated.

(4) Step 4:

Starting from step 1 with the seat belt warning light on the combination meter assembly blinking, when the parking brake is applied, check that the seat belt warning light on the combination meter assembly changes from blinking to illuminated.

(5) Step 5:

Starting from step 1 with the seat belt warning light on the combination meter assembly blinking, with the front passenger seat belt not fastened and the weight on the front passenger seat, check that the seat belt warning light on the combination meter assembly turns off when the weight is removed from the front passenger seat.

(6) Step 6:

Starting from step 1 with the seat belt warning light on the combination meter assembly blinking, when the front passenger seat belt is fastened, check that the seat belt warning light on the combination meter assembly turns off.

3. INSPECT REAR SEAT BELT WARNING LIGHT

(a) Check the state of the rear seat belt warning light on the radio receiver assembly: (1) Turn the engine switch off. (2) Turn the engine switch on (IG). (3) When a rear seat belt is not fastened, check that the rear seat belt warning light on the radio receiver assembly is illuminated. (4) After 66 seconds, check that the rear seat belt warning light on the radio receiver assembly turns off. (5) When one of the rear seat belts is unfastened from being fastened, check that the rear seat belt warning light on the radio receiver assembly illuminates.

*A w/o Rear No. 2 Seat *B w/ Rear No. 2 Seat *C for 60/40 Split Seat Type *1 Rear Seat Belt Warning Light (Radio Receiver Assembly) *a LH *b Center *c RH *d Rear No. 1 Seat LH *e Rear No. 1 Seat Center *f Rear No. 1 Seat RH *g Rear No. 2 Seat LH *h Rear No. 2 Seat RH

4. INSPECT FRONT SEAT BELT WARNING BUZZER

HINT:

The seat belt warning buzzer can be customized. Make sure that this function is ON.

Click here

(a) Place a weight of 20 kg (44.0 lb) on the front passenger seat.

NOTICE:

Place the weight on the seat cushion and allow it to come into contact with the seatback.

(b) After turning the engine switch on (IG), wait for approximately 1.8 seconds with the driver seat belt not fastened check that the seat belt warning buzzer in the combination meter assembly sounds at an interval of 1.2 seconds for 6 seconds.

(c) Lift the vehicle using a swing arm type lift.

Click here

(d) Start the engine.

(e) When the driver or front passenger seat belt is not fastened and the vehicle is driven at approximately 20 km/h (12 mph) or more, check that the seat belt warning buzzer in the combination meter assembly sounds once.

(f) When 24 seconds have passed after the buzzer sounded, check that the seat belt warning buzzer in the combination meter assembly sounds at an interval of 1.2 seconds for 6 seconds.

(g) After the seat belt warning buzzer has been sounding for 6 seconds at an interval of 1.2 seconds, check that the seat belt warning buzzer in the combination meter assembly sounds at an interval of 0.4 seconds for 90 seconds.

(h) Check that the seat belt warning buzzer in the combination meter assembly stops 96 seconds after it started sounding at an interval of 1.2 seconds.

(i) After the seat belt warning buzzer in the combination meter assembly stops and the vehicle is driven at approximately 20 km/h (12 mph) or more with the driver or front passenger seat belt fastened, when the driver or front passenger seat belt is unfastened, check that the buzzer sounds in the same pattern again.

(j) After the seat belt warning buzzer in the combination meter assembly stops sounding, move the shift lever to R, and then move it to D. Drive the vehicle at approximately 20 km/h (12 mph) or more with the driver or front passenger seat belt not fastened, and check that the buzzer sounds in the same pattern again.

5. INSPECT REAR SEAT BELT WARNING BUZZER

HINT:

The seat belt warning buzzer can be customized. Make sure that this function is ON.

Click here

(a) Lift the vehicle using a swing arm type lift.

Click here

(b) Fasten the driver seat belt.

(c) Start the engine.

(d) Fasten and unfasten a rear seat belt then drive the vehicle at approximately 20 km/h (12 mph) or more and check that the seat belt warning buzzer in the combination meter assembly sounds once.

(e) When 24 seconds have passed after the buzzer sounded, check that the seat belt warning buzzer in the combination meter assembly sounds at an interval of 1.2 seconds for 6 seconds.

(f) After the seat belt warning buzzer has been sounding for 6 seconds at an interval of 1.2 seconds, check that the seat belt warning buzzer in the combination meter assembly sounds at an interval of 0.4 seconds for 30 seconds.

(g) Check that the seat belt warning buzzer in the combination meter assembly stops 36 seconds after it started sounding at an interval of 1.2 seconds.

(h) After the seat belt warning buzzer in the combination meter assembly stops, turn the engine switch off, open and close either rear door and then start the engine. Drive the vehicle at approximately 20 km/h (12 mph) or more while a rear seat belt is not fastened and check that the buzzer sounds in the same pattern again.

(i) After the seat belt warning buzzer in the combination meter assembly stops, fasten a rear seat belt, drive the vehicle at approximately 20 km/h (12 mph) or more, unfasten the rear seat belt and check that the buzzer sounds in the same pattern again.

(j) After the seat belt warning buzzer in the combination meter assembly stops, stop the vehicle, move the shift lever to R and then move it to D. Drive the vehicle at approximately 20 km/h (12 mph) or more, and check that the buzzer sounds in the same pattern again.