Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Freeze Frame Data

FREEZE FRAME DATA

1. FREEZE FRAME DATA

HINT:

  • Whenever a DTC is detected or the ABS operates, the skid control ECU stores the current vehicle (sensor) state as freeze frame data.
  • The skid control ECU stores the number of times (maximum: 31) the ignition switch has been turned from OFF to ON since the last time the ABS was activated. However, if the vehicle was stopped or at low speed (4.3 mph (7 km/h) or less), or if a DTC is detected, the skid control ECU will not count the number after that.
  • Freeze frame data at the time the ABS operates: The skid control ECU stores and updates the data whenever the ABS system operates. When the ECU stores data at the time a DTC is detected, the data stored when the ABS operated is erased.
  • Freeze frame data at the time a DTC is detected: When the skid control ECU stores data at the time a DTC is detected, no updates will be performed until the data is cleared.

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Check the freeze frame data by following the prompts on the Techstream display.

ABS/VSC/TRAC

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Elapsed Time after Freeze Trigger

Elapsed time after freeze trigger/ Min.: 0 msec, Max.: 510 msec

-

-

Number of IG ON

Number of times ignition switch turned to ON after storing freeze frame data/ 0 to 31

-

-

Buzzer

VSC warning 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

-

Reservoir Warning SW

Brake fluid level warning switch/ ON or OFF

OFF

-

Gear Position

Gear position information/ P/N, R, 1st-10th, Fail or Not R

Actual gear position

-

Shift Lever Position

Shift lever position information/ P/N, R, D/M, 1st-6th/B or Fail

Actual shift lever position

-

Operated System

Operated system status/ ABS, VSC, TRAC, BA, HAB, Fail, PBA, PB, HA-CTRL, TSC, SCB, Sys or Non

-

ABS: ABS is activated.

VSC: VSC is activated.

TRAC: TRAC is activated.

BA: BA is activated.

HAB: HAB is activated.

Fail: Fail safe mode is activated.

PBA: PBA is activated.

PB: PB is activated.

HA-CTRL: Hill-start assist control is activated.

TSC: Trailer sway control activated.

SCB: Secondary collision brake is activated.*

Sys: System prohibit is activated.

Non: No operation is activated.

HINT:

*: Not supported

Master Cylinder Sensor

Master cylinder pressure sensor reading/ Min.: 0.00 V, Max.: 5.00 V

0.3 to 0.9 V: When brake pedal released

The value increases when the brake pedal is depressed.

M/C Sensor Grade

Master cylinder pressure sensor change/ Min.: -30 MPa/s, Max.: 225 MPa/s

0 MPa/s: When brake pedal released or pedal held at constant position

Changes in proportion with the pedal movement speed when the brake pedal is being operated.

Yaw Rate Sensor

Yaw rate and acceleration sensor/ Min.: -128 °/s, Max.: 127 °/s

0 °/s: Vehicle stopped

-128 to 0 °/s: Turning right

0 to 127 °/s: Turning left

-

Lateral G

Lateral G/ Min.: -25.10 m/s2, Max.: 24.90 m/s2

-

Changes in proportion with the pedal movement speed when the brake pedal is being operated.

Forward and Rearward G

Forward and backward G/ Min.: - 25.10 m/s2, Max.: 24.90 m/s2

-

Changes in proportion with acceleration during acceleration/deceleration.

FR Wheel Speed

Front wheel speed sensor RH reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)

0 km/h (0 mph): Vehicle stopped

No large fluctuations when driving at a constant speed.

FL Wheel Speed

Front wheel speed sensor LH reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)

0 km/h (0 mph): Vehicle stopped

No large fluctuations when driving at a constant speed.

RR Wheel Speed

Rear wheel speed sensor RH reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)

0 km/h (0 mph): Vehicle stopped

No large fluctuations when driving at a constant speed.

RL Wheel Speed

Rear wheel speed sensor LH reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)

0 km/h (0 mph): Vehicle stopped

No large fluctuations when driving at a constant speed.

Vehicle Speed

Maximum wheel speed sensor reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)

0 km/h (0 mph): Vehicle stopped

No large fluctuations when driving at a constant speed.

Vehicle Speed Grade

Vehicle acceleration/ Min.: -25.10 m/s2, Max.: 24.90 m/s2

0 m/s2: Vehicle stopped

Changes in proportion with the vehicle acceleration/deceleration during driving.

FR Wheel Direction

Front wheel RH direction signal/ Forward or Back

Forward: Forward

Back: Backward

-

FL Wheel Direction

Front wheel LH direction signal/ Forward or Back

Forward: Forward

Back: Backward

-

RR Wheel Direction

Rear wheel RH direction signal/ Forward or Back

Forward: Forward

Back: Backward

-

RL Wheel Direction

Rear wheel LH direction signal/ Forward or Back

Forward: Forward

Back: Backward

-

Real Engine Torque

Actual engine torque/ Min.: -1024.0 Nm, Max.: 1023.0 Nm

-

-

Accelerator Opening Angle %

Throttle valve opening amount/ Min.: 0.0 %, Max.: 127.5 %

0 %: When accelerator pedal released

Changes in proportion with the movement of the pedal during accelerator pedal operation.

Inspection Mode

Inspection mode/ Other or Inspect

Other: Normal mode

Inspect: Inspection mode

-

Steering Angle Sensor

Steering angle sensor/ Min.: - 3276.8 °, Max.: 3276.7 °

Left turn: Increase

Right turn: Decrease

-

TRAC/VSC Off Mode

TRAC/VSC off mode/ Normal, TRC OFF, VSC Expert Mode or VSC OFF

Normal: Normal mode

TRC OFF: TRAC off mode

VSC Expert Mode: VSC expert mode

VSC OFF: VSC off mode

-

Operation History of IG OFF while Vehicle is moving

History of ignition switch turned off when vehicle is in motion/ ON or OFF

ON: History of ignition switch turned off with vehicle speed 3 km/h (2 mph) or higher

OFF: No history

-

Fail-safe Chart
FAIL-SAFE CHART 1. FAIL SAFE OPERATION If there is a problem with any sensor signals or hydraulic brake booster systems, the skid control ECU prohibits the power supply to the actuator ...

Data List / Active Test
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 p ...

Other materials:

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Use the emergency flashers if the vehicle malfunctions or is involved in an accident. Press the switch to flash all the turn signal lights. To turn them off, press the switch once again. NOTICE ■To prevent battery discharge Do not leave the emergency flashers on longer than necessary ...

Problem Symptoms Table
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Removal
REMOVAL CAUTION / NOTICE / HINT HINT: Use the same procedure for both the RH and LH sides. The procedure described below is for the LH side. PROCEDURE 1. PRECAUTION CAUTION: Be sure to read Precaution thoroughly before servicing (See page ). NOTICE: After turning the ign ...

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