CAUTION / NOTICE / HINT
NOTICE:
After replacing the skid control ECU (brake actuator assembly), perform "Calibration".
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PROCEDURE
1. | PERFORM ROAD TEST |
(a) After turning the engine switch on (IG), compare the operating sound of the brake actuator the first time the vehicle speed reaches approximately 25 km/h (16 mph) with a known good vehicle of the same model.
OK:
The operating sound is the same or quieter than that of a known good vehicle of the same model.
HINT:
When the vehicle speed reaches approximately 20 km/h (12 mph), the initial check of the brake actuator assembly is performed and pump motor operation sounds are generated.
OK | ![]() | END |
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2. | CHECK BRAKE ACTUATOR BOLT CUSHION |
(a) Check that the cushion of the brake actuator bracket assembly is not worn, damaged or deformed.
OK:
The cushion of the brake actuator bracket assembly is not worn, damaged or deformed.
NG | ![]() | REPLACE BRAKE ACTUATOR BOLT CUSHION |
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3. | ADJUST INSTALLATION OF BRAKE ACTUATOR ASSEMBLY |
(a) Drain the brake fluid.
(b) Disconnect all brake lines from the brake actuator assembly.
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(c) Connect each brake line so that the cushion of the brake actuator assembly is tensioned evenly.
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NOTICE:
After connecting all the brake lines, add brake fluid and bleed the brake system.
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HINT:
By reducing the tension on the brake lines and cushion, the operating sound of the brake actuator assembly may be reduced.
(d) Check that no brake lines interfere the vehicle body or other components.
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4. | RECHECK SYMPTOM |
(a) Perform a road test and check the magnitude of the operating sound again.
OK:
The operating sound is the same or quieter than that of a known good vehicle of the same model.
OK | ![]() | END |
NG | ![]() | REPLACE BRAKE ACTUATOR ASSEMBLY |
Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual > Lighting System (w/ Automatic Headlight Beam Level Control System): Vehicle Speed Sensor (B2415)
DESCRIPTION The No. 1 headlight ECU sub-assembly LH receives speed signals from the skid control ECU (brake actuator assembly) via CAN communication and performs light control. DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from B2415 Vehicle Speed Sensor ...
Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual > Automatic Transaxle System: Manual Shifting Test
MANUAL SHIFTING TEST MANUAL SHIFTING TEST HINT:
Using this test, it can be determined whether a problem is in an electrical circuit or if it is a mechanical problem in the transaxle.
If any abnormalities are found in the following test, the problem is in the transaxle itself.
(a) Disconnect ...