Lexus NX: Data List / Active Test
DATA LIST / ACTIVE TEST
DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.
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.
(a) Connect the Techstream to the DLC3.
(b) Turn the power 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 | - | - | - | Not applicable |
| Total Distance Traveled - Unit | - | - | - | Not applicable |
| PCS Function ON/OFF State | Pre-collision system on/off status | ON or OFF | ON: Pre-collision system on OFF: Pre-collision system off | - |
| 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 operating PBA Standby Request: Pre-collision brake assist operating and brake pedal not depressed PBA Request Level 1: Pre-collision brake assist operating and brake pedal depressed PBA Request Level 2: Pre-collision brake assist operating and brake pedal deeply depressed | The value varies according to the possibility of a collision. The pre-collision brake assist request only indicates the status that the assist preparation is necessary. Whether or not the assist control is actually performed is dependent upon how the driver depresses the brake. |
| VGRS Activation Request | VGRS control activation request | Not Request, VGRS 1 Request, VGRS 2 Request, VGRS 3 Request | Not Request: No request VGRS 1 Request: Request 1 VGRS 2 Request: Request 2 VGRS 3 Request: Request 3 | This item is displayed on the Techstream for vehicles without the VGRS system, but cannot be used |
| Warning Brake Request | Warning brake request status | ON or OFF | ON: Warning brake request on OFF: Warning brake request off | - |
| FPB Request | PCS brake request to skid control ECU (brake booster with master cylinder assembly) (pre-collision braking) | ON or OFF | ON: Operating OFF: Not operating | - |
| PB Request | Pre-collision brake operation status | ON or OFF | ON: Operating OFF: Not operating | - |
| AVS Control Request | AVS operation status | ON or OFF | ON: Operating OFF: Not operating | This item is displayed on the Techstream for vehicles without AVS, but cannot be used |
| Prefill | PCS brake operation preparation to skid control ECU (brake booster with master cylinder assembly) | ON or OFF | ON: Operating OFF: Not operating | - |
| PBR Request | PBR operation status | ON or OFF | ON: Operating OFF: Not operating | - |
| PBH Request | PBH operation status | ON or OFF | ON: Operating OFF: Not operating | - |
| LPB Request | LPB operation status | ON or OFF | ON: Operating OFF: Not operating | - |
| PCS PBA Invalid | Pre-collision brake assist function status | ON or OFF | ON: Pre-collision brake assist function valid OFF: Pre-collision brake assist function invalid | - |
| PCS Warning Buzzer Invalid | PCS warning buzzer function status | ON or OFF | ON: PCS warning buzzer function valid OFF: PCS warning buzzer function invalid | - |
| PCS PB Invalid | PCS brake function status | ON or OFF | ON: PCS brake function valid OFF: PCS brake function invalid | - |
| PCS Warning Display Request | PCS warning display request status for the multi-information display | Not Request, PCS Warning Display 1 Request, PCS Warning Display 2 Request, PCS Warning Display 3 Request | Not Request: No display PCS Warning Display 1 Request: Display 1 PCS Warning Display 2 Request: Display 2 PCS Warning Display 3 Request: Display 3 | - |
| PCS Warning Buzzer Request | PCS warning buzzer (skid control buzzer) status | ON or OFF | ON: PCS warning buzzer sounding OFF: PCS warning buzzer not sounding | - |
| Vehicle Information (Conv/HV) | Vehicle information (Conv/HV) | Unknown, Conv, HV | - | - |
| PCS Function ON/OFF State Stored | Storage condition of PCS ON/OFF condition when the PCS function is off and the power switch is turned from off to on (IG) | Stored or Not Stored | Stored: Pre-collision system maintains off Not stored: Pre-collision system always turns on | - |
| PCS Warning Timing State Stored 2 | Storage condition of warning sensitivity setting when the PCS function is off and the power switch is turned from off to on (IG) | Stored or Not Stored | Stored: Sensitivity and CAUTION settings are maintained as previous value Not stored: Sensitivity and CAUTION is reset to default setting | - |
| PCS Warning Timing State Stored 3 | Storage condition of warning sensitivity setting when the PCS function is turned from off to on while the power switch is on (IG) | Stored or Not Stored | Stored: Sensitivity and CAUTION settings are maintained as previous value Not stored: Sensitivity and CAUTION is reset to default setting | - |
| PCS Warning Timing State Stored 1 | Storage condition of warning sensitivity setting when the PCS function is on and the power switch is turned from off to on (IG) | Stored or Not Stored | Stored: Sensitivity and CAUTION settings are maintained as previous value Not stored: Sensitivity and CAUTION is reset to default setting | - |
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 power 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 | Active / Not Active | Test possible with power switch on (IG), vehicle stopped |
READ NEXT:
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Pre-collision System DTC No. Detection Item Link C142571 Stop Light Relay Actuator Stuck U012587 Lost Communication With Multi-axis Acceleration S
Vehicle Control History
VEHICLE CONTROL HISTORY NOTICE: When checking the vehicle control history, make sure to record the output histories. Then, remove the histories and recheck the output histories again. CHECK VEHICLE CO
Stop Light Relay Actuator Stuck (C142571)
DESCRIPTION The stop light switch assembly and skid control ECU (brake booster with master cylinder assembly) outputs stop light signals. When the skid control ECU (brake booster with master cylinder
SEE MORE:
Power Source Circuit
DESCRIPTION This circuit provides power to operate the blind spot monitor sensor. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the following inspection procedure. PROCEDURE 1. CHECK HARNESS AND CONNECTOR (BLIND SPOT MON
On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY (a) w/o Auto Wiper System: Check the front wiper intermittent operation. (1) Connect a voltmeter positive (+) lead to terminal I125-3 (+1) and a negative (-) lead to terminal I124-4 (EW). *a Component with
