Toyota Tundra Service Manual: Freeze Frame Data

FREEZE FRAME DATA

FREEZE FRAME DATA

(a) Whenever an ABS DTC is detected, the skid control ECU (brake actuator assembly) stores the current vehicle (ECU or sensor) state as Freeze Frame Data.

(b) The skid control ECU (brake actuator assembly) 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.

HINT:

  • If the vehicle is stopped or at a low speed (7 km/h (4.3 mph) or less), or if a DTC is stored, the skid control ECU will stop counting the number of times the ignition switch has been turned from off to ON.
  • Freeze Frame Data at the time the ABS operates:

    The skid control ECU (brake actuator assembly) stores and updates data whenever the ABS operates.

    When the ECU stores data at the time a DTC is detected, the data stored during ABS operation is cleared.

  • Freeze Frame Data at the time a DTC is detected:

    When the skid control ECU (brake actuator assembly) stores data at the time a DTC is detected, no updates will be performed until the data is cleared.

CHECK FREEZE FRAME DATA

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

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

(f) Select a DTC to display its Freeze Frame Data.

ABS/VSC/TRAC

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Detailed Freeze DTC

Detailed code for Freeze Frame DTC

Min.: 0, Max.: 65535

0: Always

-

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 Freeze Frame Data stored

0 to 31

-

-

Stop Light SW

Stop light switch assembly

ON or OFF

ON: Brake pedal depressed

OFF: Brake pedal released

-

Parking Brake SW

Parking brake switch assembly

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

Non, ABS, VSC, TRAC, BA, HAB, Fail, PBA, PB, HA-CTRL, TSC, SCB, Sys

Actual operated system

Non: No operation is activated.

ABS: ABS is activated.

VSC: VSC is activated.

TRAC: TRAC is activated.

BA: BA is activated.

HAB:High power assist brake 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 is activated.

SCB: Secondary collision brake is activated*.

Sys: System prohibit is activated.

HINT:

*: System not equipped to vehicle

Master Cylinder Sensor

Master cylinder pressure sensor reading

Min.: 0.00 V, Max.: 5.00 V

Brake pedal released: 0.20 to 0.40 V

Reading increases when brake pedal is depressed

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

When brake pedal is being operated: Changes in proportion with the pedal movement speed

Yaw Rate Sensor

Yaw rate sensor

Min.: -128°/s, Max.: 127°/s

Vehicle stopped: 0°/s

Turning right: -128 to 0°/s

Turning left: 0 to 127°/s

-

Lateral G

Lateral G

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

-

During turning: Changes in proportion with lateral acceleration

Forward and Rearward G

Forward and backward G

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

-

During acceleration/deceleration: Changes in proportion with acceleration

FR Wheel Speed

Front wheel speed sensor RH reading

Min.: 0 km/h (0 mph), Max.: 326 km/h (203 mph)

Vehicle stopped: 0 km/h (0 mph)

When driving at constant speed: No large fluctuations

FL Wheel Speed

Front wheel speed sensor LH reading

Min.: 0 km/h (0 mph), Max.: 326 km/h (203 mph)

Vehicle stopped: 0 km/h (0 mph)

When driving at constant speed: No large fluctuations

RR Wheel Speed

Rear wheel speed sensor RH reading

Min.: 0 km/h (0 mph), Max.: 326 km/h (203 mph)

Vehicle stopped: 0 km/h (0 mph)

When driving at constant speed: No large fluctuations

RL Wheel Speed

Rear wheel speed sensor LH reading

Min.: 0 km/h (0 mph), Max.: 326 km/h (203 mph)

Vehicle stopped: 0 km/h (0 mph)

When driving at constant speed: No large fluctuations

Vehicle Speed

Maximum wheel speed sensor reading

Min.: 0 km/h (0 mph), Max.: 326 km/h (203 mph)

Vehicle stopped: 0 km/h (0 mph)

When driving at constant speed: No large fluctuations

Vehicle Speed Grade

Vehicle acceleration

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

Vehicle stopped: 0 m/s2

During driving: Changes in proportion with vehicle acceleration/deceleration

Real Engine Torque

Actual engine torque

Min.: -1024 Nm, Max.: 1023 Nm

-

-

Accelerator Opening Angle %

Percentage of accelerator pedal opening angle

Min.: 0.0%, Max.: 127.5%

The accelerator pedal released: 0.0%

During accelerator pedal operation: Changes in proportion with the pedal movement

Brake Pedal Load Sensing SW

Brake pedal load sensing switch

ON or OFF

ON: Brake pedal depressed beyond the specified point

OFF: Brake pedal not depressed beyond the specified point

-

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 OFF

Normal: Normal mode

TRC OFF: TRAC off mode

VSC OFF: VSC off mode

-

CLEAR FREEZE FRAME DATA

NOTICE:

Clearing the DTCs will also clear the Freeze Frame Data.

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Clear the DTCs and Freeze Frame Data.

Click here

    Fail-safe Chart

    How To Proceed With Troubleshooting

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