2012 Lexus RX 450h 3.5L Eng VIN CFACTORY OEM SERVICE PROCEDURE

Data List / Active Test

  1. 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.

    NOTE:

    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.

    1. Warm up the engine.
    2. Turn the power switch off.
    3. Connect the Techstream to the DLC3.
    4. Turn the power switch on (IG).
    5. Turn the Techstream on.
    6. Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.
    7. According to the display on the Techstream, read the Data List.
      ABS/VSC/TRAC

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      ABS Warning Light ABS warning light / ON or OFF ON: Warning light on
      OFF: Warning light off      		 -
      Brake Warning Light Brake warning light / red (malfunction) / ON or OFF ON: Warning light on
      OFF: Warning light off      		 -
      ECB* Warning Light Brake warning light / yellow (minor malfunction) / ON or OFF ON: Warning light on
      OFF: Warning light off      		 -
      Buzzer Skid control buzzer / ON or OFF ON: Buzzer on
      OFF: Buzzer off      		 -
      Stop Light SW Stop light switch / ON or OFF ON: Brake pedal depressed
      OFF: Brake pedal released      		 -
      Parking Brake SW Parking brake switch / ON or OFF ON: Parking brake applied
      OFF: Parking brake released      		 -
      TRC(TRAC)/VSC OFF SW VSC OFF switch / ON or OFF ON: Switch on
      OFF: Switch off      		 -
      Reservoir Warning SW Brake fluid level warning switch / ON or OFF ON: Reservoir level low
      OFF: Reservoir level normal      		 -
      Main Idle SW Main idle switch / ON or OFF ON: Accelerator pedal released
      OFF: Accelerator pedal depressed      		 -
      Shift Lever Position Shift lever position information / Fail, 1st-6th/B, D/M, P/N or R Actual shift lever position -
      Inspection Mode Inspection mode / Other or Inspect Other: Normal mode
      Inspect: Inspection mode      		 -
      Master Cylinder Sensor Master cylinder pressure sensor 1 / Min.: 0 V, Max.: 5 V When brake pedal released: 0.3 to 0.7 V Reading increases when brake pedal is depressed
      Voltage of M/C Voltage of master cylinder pressure sensor / Min.: -2.5 V, Max.: 2.49 V - -
      Master Cylinder Sensor2 Master cylinder pressure sensor 2 / Min.: 0 V, Max.: 5 V When brake pedal released: 0.3 to 0.7 V Reading increases when brake pedal is depressed
      Voltage of M/C2 Voltage of master cylinder pressure sensor 2 / Min.: -2.5 V, Max.: 2.49 V - -
      Stroke Sensor Brake pedal stroke sensor / Min.: 0 V, Max.: 5 V When brake pedal released: 0.8 to 1.2 V Reading increases when brake pedal is depressed
      Voltage of Stroke Sensor Voltage of brake pedal stroke sensor / Min.: -2.5 V, Max.: 2.49 V - -
      Stroke Sensor2 Brake pedal stroke sensor 2 / Min.: 0 V, Max.: 5 V When brake pedal released: 3.8 to 4.2 V Reading decreases when brake pedal is depressed
      Voltage of Stroke Sensor2 Voltage of brake pedal stroke sensor 2 / Min.: -2.5 V, Max.: 2.49 V - -
      Accumulator Sensor Accumulator pressure sensor / Min.: 0 V, Max.: 5 V Specified value: 2.6 to 3.8 V When brake fluid is stored in the accumulator: Accumulator pressure changes in accordance with volume of fluid stored in the accumulator
      Deceleration Sensor Acceleration sensor 1 / Min.: -18.18 m/s2 , Max.: 18.18 m/s2 - During deceleration/acceleration: Changes continuously
      Zero Point of Decele Memorized zero value / Min.: -25.11 m/s2 , Max.: 24.91 m/s2 - -
      Deceleration Sensor2 Acceleration sensor 2 / Min.: -18.18 m/s2 , Max.: 18.18 m/s2 - During deceleration/acceleration: Changes continuously
      Zero Point of Decele2 Memorized zero value / Min.: -25.11 m/s2 , Max.: 24.91 m/s2 - -
      Yaw Rate Sensor Yaw rate sensor 1 / Min.: -128 degrees/s, Max.: 127 degrees/s Vehicle stationary: 0 degrees/s
      Right turn: -128 to 0 degrees/s
      Left turn: 0 to 127 degrees/s      		 -
      Zero Point of Yaw Rate Memorized zero value / Min.: -128 degrees/sec, Max.: 127 degrees/sec - After completing zero point calibration: 0 degrees/sec
      Yaw Rate Sensor2 Yaw rate sensor 2 / Min.: -128 degrees/s, Max.: 127 degrees/s Vehicle stationary: 0 degrees/s
      Right turn: -128 to 0 degrees/s
      Left turn: 0 to 127 degrees/s      		 -
      Zero Point of Yaw Rate2 Memorized zero value / Min.: -128 degrees/s, Max.: 127 degrees/s - After completing zero point calibration: 0 degrees/s
      Steering Angle Sensor Steering angle sensor / Min.: -3276.8 degrees, Max.: 3276.7 degrees Left turn: Increase
      Right turn: Decrease      		 -
      Zero Point of Steering Angle Memorized zero value / Min.: -3276.8 degrees, Max.: 3276.7 degrees - After clearing zero point calibration: 0 degrees
      FR W/C Sensor FR wheel cylinder pressure sensor / Min.: 0 V, Max.: 5 V When brake pedal released: 0.3 to 0.7 V Reading increases when brake pedal is depressed
      FL W/C Sensor FL wheel cylinder pressure sensor / Min.: 0 V, Max.: 5 V When brake pedal released: 0.3 to 0.7 V Reading increases when brake pedal is depressed
      RR W/C Sensor RR wheel cylinder pressure sensor / Min.: 0 V, Max.: 5 V When brake pedal released: 0.3 to 0.7 V Reading increases when brake pedal is depressed
      RL W/C Sensor RL wheel cylinder pressure sensor / Min.: 0 V, Max.: 5 V When brake pedal released: 0.3 to 0.7 V Reading increases when brake pedal is depressed
      Lateral G Lateral G / Min.: -25.11 m/s2 , Max.: 24.91 m/s2 - During turning: Changes in proportion with acceleration
      Forward and Rearward G Forward and backward G / Min.: -25.11 m/s2 , Max.: 24.91 m/s2 - During acceleration/deceleration: Changes in proportion with acceleration
      Yaw Rate Value Yaw rate value / Min.: -128 degrees/s, Max.: 127 degrees/s - During turning: Changes in proportion with yaw rate
      Steering Angle Value Steering angle value / Min.: -3276.8 degrees, Max.: 3276.7 degrees - During steering operation: Changes in proportion with steering wheel rotation
      Stop Light Relay Stop light control relay / ON or OFF ON: Relay on
      OFF: Relay off      		 -
      Slip Indicator Light Slip indicator light / ON or OFF ON: Indicator light on
      OFF: Indicator light off      		 -
      Stop Light System Indicator Light - - -
      FR Wheel Speed FR wheel speed sensor / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      FL Wheel Speed FL wheel speed sensor / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      RR Wheel Speed RR wheel speed sensor / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      RL Wheel Speed RL wheel speed sensor / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      Vehicle Speed Maximum wheel speed sensor / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      FR Wheel Acceleration FR wheel acceleration / Min.: -200.84 m/s2 , Max.: 199.27 m/s2 - During deceleration/acceleration: Changes continuously
      FL Wheel Acceleration FL wheel acceleration / Min.: -200.84 m/s2 , Max.: 199.27 m/s2 - During deceleration/acceleration: Changes continuously
      RR Wheel Acceleration RR wheel acceleration / Min.: -200.84 m/s2 , Max.: 199.27 m/s2 - During deceleration/acceleration: Changes continuously
      RL Wheel Acceleration RL wheel acceleration / Min.: -200.84 m/s2 , Max.: 199.27 m/s2 - During deceleration/acceleration: Changes continuously
      Stop Light Relay Output Stop light control relay output / ON or OFF ON: Relay output on
      OFF: Relay output off      		 -
      FR Wheel ABS Ctrl Status FR wheel ABS control status / ON or OFF ON: During the control -
      FL Wheel ABS Ctrl Status FL wheel ABS control status / ON or OFF ON: During the control -
      RR Wheel ABS Ctrl Status RR wheel ABS control status / ON or OFF ON: During the control -
      RL Wheel ABS Ctrl Status RL wheel ABS control status / ON or OFF ON: During the control -
      BA Ctrl Status BA control status / ON or OFF ON: During the control -
      PBA Ctrl Status PBA control status / ON or OFF ON: During the control -
      TRC(TRAC) Ctrl Status TR(A)C control status / ON or OFF ON: During the control -
      TRC(TRAC) Brake Ctrl Status TR(A)C brake control status / ON or OFF ON: During the control -
      FR Wheel VSC Ctrl Status FR wheel VSC control status / ON or OFF ON: During the control -
      FL Wheel VSC Ctrl Status FL wheel VSC control status / ON or OFF ON: During the control -
      RR Wheel VSC Ctrl Status RR wheel VSC control status / ON or OFF ON: During the control -
      RL Wheel VSC Ctrl Status RL wheel VSC control status / ON or OFF ON: During the control -
      Accelerator Opening Angle % The difference of a present accelerator / Min.: 0%, Max.: 127% When the accelerator pedal released: 0% During accelerator pedal operation: Changes in proportion with the pedal movement
      FR Regenerative Request FR regenerative request torque / Min.: 0 N*m, Max.: 65536 N*m - Changes according to brake pedal force
      (When depressing the brake pedal lightly after above 30 km/h (19 mph) or more, avoiding sudden braking.)
      FR Regenerative Operation FR regenerative operation torque / Min.: 0 N*m, Max.: 65536 N*m - Changes according to brake pedal force
      (When depressing the brake pedal lightly after above 30 km/h (19 mph) or more, avoiding sudden braking.)
      RR Regenerative Request RR regenerative request torque / Min.: 0 N*m, Max.: 65536 N*m - Changes according to brake pedal force
      (When depressing the brake pedal lightly after above 30 km/h (19 mph) or more, avoiding sudden braking.)
      RR Regenerative Operation RR regenerative operation torque / Min.: 0 N*m, Max.: 65536 N*m - Changes according to brake pedal force
      (When depressing the brake pedal lightly after above 30 km/h (19 mph) or more, avoiding sudden braking.)
      Regenerative Cooperation Regenerative cooperation / ON or OFF ON: Operate
      OFF: Not operate      		 -
      ECB* Motor Relay ABS motor relay / ON or OFF ON: Relay on
      OFF: Relay off      		 -
      ECB* Motor Relay2 ABS motor relay 2 / ON or OFF ON: Relay on
      OFF: Relay off      		 -
      ECB* Main Relay ABS main relay / ON or OFF ON: Relay on
      OFF: Relay off      		 -
      ECB* Main Relay2 ABS main relay 2 / ON or OFF ON: Relay on
      OFF: Relay off      		 -
      ECB* Solenoid (SMC1) Master cut solenoid (SMC1) / ON or OFF ON: Operate
      OFF: Not operate      		 -
      ECB* Solenoid (SMC2) Master cut solenoid (SMC2) / ON or OFF ON: Operate
      OFF: Not operate      		 -
      ECB* Solenoid (SCSS) Stroke simulator solenoid (SCSS) / ON or OFF ON: Operate
      OFF: Not operate      		 -
      SLAFR Solenoid Current Linear solenoid (FRA) current / Min.: 0 A, Max.: 3 A When brake pedal released: 0 A -
      SLAFL Solenoid Current Linear solenoid (FLA) current / Min.: 0 A, Max.: 3 A When brake pedal released: 0 A -
      SLARR Solenoid Current Linear solenoid (RRA) current / Min.: 0 A, Max.: 3 A When brake pedal released: 0 A -
      SLARL Solenoid Current Linear solenoid (RLA) current / Min.: 0 A, Max.: 3 A When brake pedal released: 0 A -
      SLRFR Solenoid Current Linear solenoid (FRR) current / Min.: 0 A, Max.: 3 A When brake pedal released: 0 A -
      SLRFL Solenoid Current Linear solenoid (FLR) current / Min.: 0 A, Max.: 3 A When brake pedal released: 0 A -
      SLRRR Solenoid Current Linear solenoid (RRR) current / Min.: 0 A, Max.: 3 A When brake pedal released: 0 A -
      SLRRL Solenoid Current Linear solenoid (RLR) current / Min.: 0 A, Max.: 3 A When brake pedal released: 0 A -
      FR Speed Open FR speed sensor open detection / Error or Normal Error: Momentary interruption
      Normal: Normal      		 -
      FL Speed Open FL speed sensor open detection / Error or Normal Error: Momentary interruption
      Normal: Normal      		 -
      RR Speed Open RR speed sensor open detection / Error or Normal Error: Momentary interruption
      Normal: Normal      		 -
      RL Speed Open RL speed sensor open detection / Error or Normal Error: Momentary interruption
      Normal: Normal      		 -
      Yaw Rate Open Yaw rate sensor open detection / Error or Normal Error: Momentary interruption
      Normal: Normal      		 -
      Deceleration Open Acceleration sensor open detection / Error or Normal Error: Momentary interruption
      Normal: Normal      		 -
      Steering Open Steering angle sensor open detection / Error or Normal Error: Momentary interruption
      Normal: Normal      		 -
      Master Cylinder Open Master cylinder pressure sensor open detection / Error or Normal Error: Momentary interruption
      Normal: Normal      		 -
      Master Cylinder2 Open Master cylinder pressure sensor 2 open detection / Error or Normal Error: Momentary interruption
      Normal: Normal      		 -
      Stroke Open Stroke sensor open detection / Error or Normal Error: Momentary interruption
      Normal: Normal      		 -
      FR Wheel Cylinder Open FR wheel cylinder pressure sensor open detection / Error or Normal Error: Momentary interruption
      Normal: Normal      		 -
      FL Wheel Cylinder Open FL wheel cylinder pressure sensor open detection / Error or Normal Error: Momentary interruption
      Normal: Normal      		 -
      RR Wheel Cylinder Open RR wheel cylinder pressure sensor open detection / Error or Normal Error: Momentary interruption
      Normal: Normal      		 -
      RL Wheel Cylinder Open RL wheel cylinder pressure sensor open detection / Error or Normal Error: Momentary interruption
      Normal: Normal      		 -
      Accumulator Open Accumulator pressure sensor open detection / Error or Normal Error: Momentary interruption
      Normal: Normal      		 -
      HV Communication Open Hybrid vehicle communication open detection / Error or Normal Error: Momentary interruption
      Normal: Normal      		 -
      VCM1 Voltage Value VCM voltage value / Min.: 0 V, Max.: 10 V Specified value: 4.8 to 5.2 V -
      VCM2 Voltage Value VCM2 voltage value / Min.: 0 V, Max.: 10 V Specified value: 4.8 to 5.2 V -
      IG1 Voltage Value IG1 voltage value / Min.: 0 V, Max.: 20 V - Changes in proportion to auxiliary battery voltage
      IG2 Voltage Value IG2 voltage value / Min.: 0 V, Max.: 20 V - Changes in proportion to auxiliary battery voltage
      BS1 Voltage Value BS1 voltage value / Min.: 0 V, Max.: 20 V - Changes in proportion to auxiliary battery voltage
      BS2 Voltage Value BS2 voltage value / Min.: 0 V, Max.: 20 V - Changes in proportion to auxiliary battery voltage
      VM1 Voltage Value VM1 voltage value / Min.: 0 V, Max.: 20 V - Changes in proportion to auxiliary battery voltage
      VM2 Voltage Value VM2 voltage value / Min.: 0 V, Max.: 20 V - Changes in proportion to auxiliary battery voltage
      +B1 Voltage Value +B1 voltage value / Min.: 0 V, Max.: 20 V - Changes in proportion to auxiliary battery voltage
      +B2 Voltage Value +B2 voltage value / Min.: 0 V, Max.: 20 V - Changes in proportion to auxiliary battery voltage
      MT Voltage Value MT voltage value / Min.: 0 V, Max.: 20 V - Changes in proportion to auxiliary battery voltage
      TRAC/VSC Off Mode TR(A)C/VSC off mode / Normal, TRC OFF, Unknown or VSC OFF Normal: Normal mode
      TRC OFF: TR(A)C off mode
      Unknown: Unspecified
      VSC OFF: VSC off mode      		 -
      Number of DTC Number of DTC / Min.: 0, Max.: 255 - Number of DTC output is displayed

      *: Electronically Controlled Brake System

  2. 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.

    1. Warm up the engine.
    2. Turn the power switch off.
    3. Connect the Techstream to the DLC3.
    4. Turn the power switch on (IG).
    5. Turn the Techstream on.
    6. Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test.
    7. According to the display on the Techstream, perform the Active Test.
      ABS/VSC/TRAC

      Tester Display Test Part Control Range Diagnostic Note
      ABS Warning Light ABS warning light Warning light ON/OFF Observe combination meter
      Brake Warning Light Brake warning light / red (malfunction) Warning light ON/OFF Observe combination meter
      ECB* Warning Light Brake warning light / yellow (minor malfunction) Warning light ON/OFF Observe combination meter
      Buzzer Skid control buzzer Buzzer ON/OFF Buzzer can be heard
      Stop Light Relay Stop light control relay Relay ON/OFF Stop lights come on
      ECB* Main Relay ABS main relay Relay ON/OFF -
      ECB* Main Relay2 ABS main relay 2 Relay ON/OFF -
      ECB* Motor Relay ABS motor relay Relay ON/OFF Operation sound of relay (clicking sound) and motor can be heard
      ECB* Motor Relay2 ABS motor relay 2 Relay ON/OFF Operation sound of relay (clicking sound) and motor can be heard
      ECB* Solenoid (SMC1) Master cut solenoid (SMC1) Solenoid ON/OFF Operation sound of solenoid (clicking sound) can be heard
      ECB* Solenoid (SMC2) Master cut solenoid (SMC2) Solenoid ON/OFF Operation sound of solenoid (clicking sound) can be heard
      ECB* Control Invalid Electronically controlled brake system control invalid Control invalid ON/OFF Electronically controlled brake system control is disabled (braking with no accumulator assist)
      Accumulator Zero Down Accumulator zero down activation Activation ON/OFF Brake fluid in the accumulator makes noise
      Stroke Simulator Cut Valve Pattern Stroke simulator cut valve pattern activation Activation ON/OFF (Difficult to identify visually)
      Actuator Air Bleeding Pattern Actuator air bleeding pattern activation Activation ON/OFF When accumulator pressure lowers, pump operation creates sound
      Power Supply Air Bleeding Pattern1 Power supply air bleeding pattern activation 1 Activation ON/OFF When accumulator pressure lowers, pump operation creates sound
      Power Supply Air Bleeding Pattern2 Power supply air bleeding pattern activation 2 Activation ON/OFF When accumulator pressure lowers, pump operation creates sound
      RL Wheel Air Bleeding Pattern RL wheel air bleeding pattern activation Activation ON/OFF When accumulator pressure lowers, pump operation creates sound
      RR Wheel Air Bleeding Pattern RR wheel air bleeding pattern activation Activation ON/OFF When accumulator pressure lowers, pump operation creates sound
      Pump Check Pattern Pump check pattern activation Activation ON/OFF When accumulator pressure lowers, pump operation creates sound
      Drain System Air Bleeding Pattern Drain system air bleeding pattern activation Activation ON/OFF When accumulator pressure lowers, pump operation creates sound
      ECB* Solenoid (SLRRL) Value Close Linear solenoid (RLR) valve Valve close ON/OFF -
      ECB* Solenoid (SLARL) Value Close Linear solenoid (RLA) valve Valve close ON/OFF -
      ECB* Solenoid (SLRRR) Value Close Linear solenoid (RRR) valve Valve close ON/OFF -
      ECB* Solenoid (SLARR) Value Close Linear solenoid (RRA) valve Valve close ON/OFF -
      ECB* Solenoid (SLRFL) Value Close Linear solenoid (FLR) valve Valve close ON/OFF -
      ECB* Solenoid (SLAFL) Value Close Linear solenoid (FLA) valve Valve close ON/OFF -
      ECB* Solenoid (SLRFR) Value Close Linear solenoid (FRR) valve Valve close ON/OFF -
      ECB* Solenoid (SLAFR) Value Close Linear solenoid (FRA) valve Valve close ON/OFF -
      TRC(TRAC) OFF Indicator Light Multi-information display (TR(A)C OFF indicator) Display ON/OFF Observe combination meter
      VSC OFF Indicator Light VSC OFF indicator light Indicator light ON/OFF Observe combination meter
      Slip Indicator Light Slip indicator light Indicator light ON/OFF Observe combination meter
      EBS Relay Stop light control relay Relay ON/OFF No change
      Stop Light System Indicator Light Stop light warning Warning ON/OFF No change

      *: Electronically Controlled Brake System

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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