Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Freeze Frame Data

FREEZE FRAME DATA

1. FREEZE FRAME DATA

(a) Using the Techstream, check the vehicle condition (ECU, sensor) when the brake system operates or a DTC is output.

2. CHECK FREEZE FRAME DATA WHEN BRAKE SYSTEM OPERATES

(a) Freeze frame data is stored when the brake system operates. The freeze frame data is updated each time the system operates.

(b) Once freeze frame data is stored when the system operates, it is not cleared until the DTC is cleared.

(c) The number of times (maximum: 31) the ignition switch has been turned from off to ON since the last time the system was activated can be stored and displayed.

HINT:

  • When the vehicle is stopped (vehicle speed below 7 km/h (4.3 mph)), turning the ignition switch from off to ON does not cause the value to increase.
  • The value "31" is displayed when the ignition switch was turned ON more than 31 times.

(d) Check freeze frame data when the system operates

(1) Turn the ignition switch off.

(2) Connect the Techstream to the DLC3 and turn the ignition switch to ON.

(3) Enter the following menus: Chassis / ABS/VSC/TRAC / Utility.

(4) Select "ABS History".

(5) Check the freeze frame data when the system operates.

3. CHECK FREEZE FRAME DATA WHEN DTC WAS STORED

(a) Freeze frame data is stored when a DTC is output.

(b) Once freeze frame data is stored when a DTC is output, it is not updated or cleared until the DTC is cleared.

(c) The number of times (maximum: 31) the ignition switch has been turned from off to ON since a DTC was output can be stored and displayed.

HINT:

The value "31" is displayed when the ignition switch was turned ON more than 31 times.

(d) Check freeze frame data when DTC is output

(1) Turn the ignition switch off.

(2) Connect the Techstream to the DLC3 and turn the ignition switch to ON.

(3) Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.

(4) Select a DTC to display the freeze frame data.

(5) Check the freeze frame data for the output DTC.

ABS/VSC/TRAC

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Number of IG ON

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

-

-

Elapsed Time

Elapsed time/ Min.: 0 sec, Max.: 100661 sec

-

-

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

-

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

M/C Sensor Grade

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

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

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

Yaw Rate Sensor

Yaw rate and deceleration 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.

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.

BS1 Voltage Value

+BS voltage value/ Min.: 0.00 V, Max.: 20.00 V

11 to 14 V

Changes in proportion to battery voltage

FR Target Oil Pressure

Front wheel RH target oil pressure/ Min.: 0 MPa, Max.: 20 MPa

Different according to target oil pressure of each wheel

-

FL Target Oil Pressure

Front wheel LH target oil pressure/ Min.: 0 MPa, Max.: 20 MPa

Different according to target oil pressure of each wheel

-

RR Target Oil Pressure

Rear wheel RH target oil pressure/ Min.: 0 MPa, Max.: 20 MPa

Different according to target oil pressure of each wheel

-

RL Target Oil Pressure

Rear wheel LH target oil pressure/ Min.: 0 MPa, Max.: 20 MPa

Different according to target oil pressure of each wheel

-

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, TRAC OFF or VSC OFF

Normal: Normal mode

TRAC OFF: TRAC off mode

VSC OFF: VSC off mode

-

Master Cylinder Pressure

Master cylinder pressure sensor pressure/ Min.: 0.00 MPa, Max.: 24.48 MPa

Brake pedal operated: Proportional to pedal force Brake pedal released: 0.00 to 1.76 MPa

-

Master Cylinder Sensor Temperature

Master cylinder pressure sensor pressure/ Min.: -80 °C (-112 °F), Max.: 175 °C (347 °F)

-

-

Vehicle Stop Time from IG ON

Time vehicle stopped after ignition switch turned ON/ Min.: 0 s, Max.: 1275 s

-

-

Travel Distance from IG ON

Driving time after ignition switch turned ON/ Min.: 0 s, Max.: 1275 s

-

-

Engine Revolutions

Engine speed/ Min.: 0 rpm, Max.: 25500 rpm

-

-

Motor Power Supply Voltage

Motor power supply voltage/ Min.: 0.00 V, Max.: 20.00 V

11 to 14 V

Changes in proportion to battery voltage

Solenoid Power Supply Voltage

Solenoid power supply voltage/ Min.: 0.00 V, Max.: 20.00 V

11 to 14 V

Changes in proportion to battery voltage

MT Voltage Value

Motor voltage value/ Min.: 0.00 V, Max.: 20.00 V

-

Changes in proportion to battery voltage

Stop Light Relay State for ECU Control

Stop light control relay (for ECU control)/ ON or OFF

ON: Engine stopped by stop and start control

OFF: Engine not stopped by stop and start control

-

Solenoid State for ECU Control

Solenoid (for ECU control) status/ ON or OFF

ON: Solenoid relay operating

OFF: Solenoid relay not operating

-

Motor State for ECU Control

Motor (for ECU control) status/ ON or OFF

ON: Motor relay operating

OFF: Motor relay not operating

-

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

-

Master Cylinder Pressure Sensor Power Supply Open

Master cylinder pressure sensor power supply voltage status/ Error or Normal

Normal

-

Solenoid Power Supply Open

Solenoid power supply voltage status/ Error or Normal

Normal

-

Motor Power Supply Open

Motor power supply voltage status/ Error or Normal

Normal

-

Stop Switch Open

Momentary interruption (open circuit) status in the wire harness between the skid control ECU (brake actuator assembly) and the stop light switch assembly/ Error or Normal

Normal

-

IG Switch

Ignition switch status/ ON or OFF

-

-

Elapsed Time after Freeze Trigger

Elapsed time after storing freeze frame data/ Min.: 0 msec, Max.: 1020 msec

-

-

4. CLEAR FREEZE FRAME DATA

NOTICE:

Clearing the DTC will also clear the Freeze Frame Data.

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Clear the DTC and Freeze Frame Data (See page Data List / Active Test ).

Fail-safe Chart
FAIL-SAFE CHART If there is a problem with sensor signals or actuator systems, the skid control ECU prohibits power supply to the brake actuator assembly and informs the ECM of a VSC s ...

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 ...

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Inspection
INSPECTION PROCEDURE 1. INSPECT NO. 1 ULTRASONIC SENSOR (a) Measure the resistance according to the value(s) in the table below. Text in Illustration *a Component without harness connected: (No. 1 Ultrasonic Sensor) Standar ...

Dtc Check / Clear
DTC CHECK / CLEAR NOTICE: When the diagnosis system is changed from normal mode to check mode or vice versa, all DTCs and freeze frame data recorded in normal mode are cleared. Before changing modes, always check and make a note of DTCs and freeze frame data. HINT: DTCs which are sto ...

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