Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Diagnosis System
DIAGNOSIS SYSTEM
FUNCTION OF WARNING INDICATOR AND MESSAGE
(a) If the pre-collision system is not functioning properly, the driver is warned by the PCS warning light and a warning message is displayed on the multi-information display.
| *a | PCS Warning Light |
| PCS warning light | Warning Message | Detail | DTC/RoB |
|---|---|---|---|
| Illuminates | "Pre-Collision System Malfunction Visit Your Dealer" | Pre-collision system malfunctioning | Stored |
| Illuminates | "Pre-Collision System Unavailable" |
| Stored |
| Illuminates | "Pre-Collision System Unavailable Clean Sensor" | Foreign matter attached to millimeter wave radar sensor assembly | Stored |
| Illuminates | "Front Camera Unavailable" |
| Stored |
| Illuminates | "Front Camera Unavailable See Owner's Manual" | Front of forward recognition camera or windshield glass is dirty or fogged | Stored |
| Illuminates | "VSC Turned Off Pre-Collision Brake System Unavailable" | VSC system is disabled | Not stored |
| PCS Warning Light | Condition |
|---|---|
| Illuminates | Pre-collision system malfunctioning (DTC stored) |
| Pre-collision system temporarily disabled | |
| Pre-collision system disabled | |
| VSC system disabled | |
| Not illuminated | Other |
INITIAL CHECK
(a) An initial check is performed when the engine switch is off for more than 2 seconds and then turned on (IG). The initial check consists of a pre-collision system diagnostic check with a duration of approximately 3 seconds.
(b) If a malfunction is detected during the initial check, the PCS warning light in the combination meter assembly will illuminate and a warning message indicating the pre-collision system is malfunctioning or disabled will be displayed on the multi-information display.
CONSTANT CHECK
(a) The forward recognition camera constantly monitors the pre-collision system for malfunctions after the engine switch is turned on (IG) and the initial check (approximately 3 seconds) has completed.
(b) If a malfunction is detected during the constant check, the PCS warning light in the combination meter assembly will illuminate and a warning message indicating the pre-collision system is malfunctioning or disabled will be displayed on the multi-information display.
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Inspect the fuses and relays related to this system before inspecting the suspected areas below. Pre-Collision System Symptom Suspected Area Link "VSC Turned OF ...
Terminals Of Ecu
TERMINALS OF ECU NOTICE:
DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the Techstream once the inspection has been completed.
D ...
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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