Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Data List / Active Test
DATA LIST / ACTIVE TEST
NOTICE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
DATA LIST
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Pre-Collision System / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Pre-Collision System > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Total Distance Traveled | - | - | - | Cannot be used |
| Total Distance Traveled - Unit | - | - | - | Cannot be used |
| PCS Function ON/OFF State | Pre-collision system status | OFF / ON | ON: Pre-collision system enabled OFF: Pre-collision system disabled | - |
| PBA Request | Pre-collision brake assist operation status | Not PBA Request / PBA Standby Request / PBA Request Level 1 / PBA Request Level 2 | Not PBA Request: Pre-collision brake assist not requested PBA Standby Request: Low pre-collision brake assist requested PBA Request Level 1: Medium pre-collision brake assist requested PBA Request Level 2: High pre-collision brake assist requested | The value changes in accordance with the possibility of a collision. This item indicates the pre-collision brake assist standby status. Whether pre-collision brake assist is applied or not is determined by the depression of the brake pedal. |
| VGRS Activation Request | - | - | - | Cannot be used |
| Warning Brake Request | - | - | - | Cannot be used |
| FPB Request | Skid control ECU (brake actuator assembly) PCS brake request (pre-braking) | OFF / ON | ON: Operating OFF: Not operating | - |
| PB Request | Pre-collision brake request status | OFF / ON | ON: Operating OFF: Not operating | - |
| AVS Control Request | AVS control activation status | OFF / ON | ON: AVS control activated OFF: AVS control not activated | w/ AVS |
| Prefill | Skid control ECU (brake actuator assembly) PCS brake assist standby | OFF / ON | ON: Operating OFF: Not operating | - |
| PBR Request | PBR operation status | OFF / ON | ON: Operating OFF: Not operating | - |
| PBH Request | PBH operation status | OFF / ON | ON: Operating OFF: Not operating | - |
| PCS PBA Invalid | PCS PBA status | OFF / ON | ON: PCS PBA Invalid OFF: PCS PBA valid | - |
| PCS Warning Buzzer Invalid | PCS warning buzzer status | OFF / ON | ON: PCS warning buzzer Invalid OFF: PCS warning buzzer valid | - |
| PCS PB Invalid | PCS PB Status | OFF / ON | ON: PCS PB Invalid OFF: PCS PB valid | - |
| PCS Warning Display Request | PCS warning sensitivity displayed on multi-information display | Not Request / PCS Warning Display 1 Request / PCS Warning Display 2 Request / PCS Warning Display 3 Request | Not Request: No message PCS Warning Display 1 Request: Warning sensitivity (early) displayed PCS Warning Display 2 Request: Warning sensitivity (middle) displayed PCS Warning Display 3 Request: Warning sensitivity (late) displayed | - |
| PCS Warning Buzzer Request | PCS warning buzzer (skid control buzzer assembly) status | OFF / ON | ON: Sounding OFF: Not sounding | - |
| Vehicle Information (Conv/HV) | Vehicle information (Conv/HV) | Unknown / Conv / HV | Unknown: Vehicle information not confirmed Conv: Conventional HV: Hybrid vehicle | - |
| PCS Function ON/OFF State Stored | Pre-collision system on/off setting when the pre-collision system is turned off and the engine switch is turned off and then to on (IG). | Not Stored / Stored | Stored: Maintains last on/off status Not Stored: Defaults to on | "PCS Function ON/OFF State Stored" is a customizable item which can be set using the Techstream. |
| PCS Warning Timing State Stored 2 | Sensitivity setting of the pre-collision system when the pre-collision system is turned on and the engine switch is turned off and then to on (IG). | Not Stored / Stored | Stored: Maintains last setting Not Stored: Defaults to middle | "PCS Warning Timing State Stored 2" is a customizable item which can be set using the Techstream. |
| PCS Warning Timing State Stored 3 | Sensitivity setting when the pre-collision system is turned off and the engine switch is turned off and then to on (IG) | Not Stored / Stored | Stored: Maintains last setting Not Stored: Defaults to middle | "PCS Warning Timing State Stored 3" is a customizable item which can be set using the Techstream. |
| PCS Warning Timing State Stored 1 | Sensitivity setting of the pre-collision system when the pre-collision system is turned off and then on with the engine switch on (IG) | Not Stored / Stored | Stored: Maintains last setting Not Stored: Defaults to middle | "PCS Warning Timing State Stored 1" is a customizable item which can be set using the Techstream. |
ACTIVE TEST
HINT:
Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Pre-Collision System / Active Test.
(e) Perform the Active Test according to the display on the Techstream.
Body Electrical > Pre-Collision System > Active Test| Tester Display | Measurement Item | Control Range | Diagnostic Note |
|---|---|---|---|
| PCS Warning Buzzer | Sounds the skid control buzzer assembly | Start / Stop | Test possible with engine switch on (IG), vehicle stopped |
Fail-safe Chart
FAIL-SAFE CHART FAIL-SAFE FUNCTION (a) When a malfunction occurs in the pre-collision system, a message will be displayed on the multi-information display and the pre-collision system will be disabled ...
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Pre-collision System DTC No. Detection Item Link C142571 Stop Light Relay Actuator Stuck U010087 Lost Communication with ECM/PCM "A" Missing Messa ...
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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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