Toyota Tundra Service Manual: Freeze Frame Data

FREEZE FRAME DATA

FREEZE FRAME DATA/INFORMATION

(a) When a DTC is stored, the trailer brake control ECU (brake control with bracket relay) stores the current vehicle state as Freeze Frame Data.

HINT:

Freeze Frame Data at the time a DTC is stored:

When the trailer brake control ECU (brake control with bracket relay) stores data at the time a DTC is stored, no updates will be performed until the data is cleared.

(b) For DTCs stored in the trailer brake control ECU (brake control with bracket relay), information (INF) codes that are contained in the Freeze Frame Data can be displayed on the Techstream.

CHECK FREEZE FRAME DATA AND INFORMATION

(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: Powertrain / Trailer Brake Controller / Trouble Codes.

(f) Read the Freeze Frame Data recorded when the DTCs were stored.

(g) Read the information.

(1) Select the item that has an information code (INF code) from the Freeze Frame Data screen.

Trailer Brake Controller:

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Slider Switch Position Sensor Voltage #1

Slider switch position sensor voltage #1 / min.: 0 V, max.: 5 V

Actual manual trailer brake output slider position

When the manual trailer brake output slider is operated from the free (0%) condition, the value gradually changes from 0 V to 5 V.

Slider Switch Position Sensor Voltage #2

Slider switch position sensor voltage #2 / min.: 0 V, max.: 5 V

Actual manual trailer brake output slider position

When the manual trailer brake output slider is operated from the free (0%) condition, the value gradually changes from 5 V to 0 V.

Gain Rocker Switch (+)

GAIN (+) selection button / ON or OFF

ON: GAIN (-) selection button OFF

OFF: GAIN (+) selection button ON

-

Gain Rocker Switch (-)

GAIN (-) selection button / ON or OFF

ON: GAIN (-) selection button OFF

OF: GAIN (-) selection button ON

-

Status of Master Cylinder Pressure Sensor Output

Status of master cylinder pressure sensor output / Valid or Invalid

Valid

-

Status of Master Cylinder Pressure Sensor

Status of master cylinder pressure sensor / Normal or Abnorm

Normal

-

Status of Brake ECU Communication

Status of skid control ECU (brake actuator assembly) communication / Valid or Invalid

Valid

-

Status of Meter ECU Communication

Status of combination meter assembly communication / Valid or Invalid

Valid

-

Status of G Sensor Communication

Status of acceleration sensor (airbag sensor assembly) communication / Valid or Invalid

Valid

-

Master Cylinder Pressure Value

Master cylinder pressure reading / Min.: 0.00 MPa, Max.: 20.48 MPa

Brake pedal operated: Proportional to pedal force

Brake pedal released: 0.00 to 1.76 MPa

-

Status of Hill-Start Assist Control (HAC)

Status of hill-start assist control / OFF or ON

OFF: Hill-start assist control not operating

ON: Hill-start assist control operating

-

Status of Trailer Sway Control (TSC) Operation

Status of trailer sway control operation / Inactive or Active

Inactive: Trailer sway control not operating

Active: Trailer sway control operating

-

Stop Light Switch

Status of stop light switch / OFF or ON

OFF: Brake pedal released

ON: Brake pedal depressed

-

Status of Stop Light Switch

Status of stop light switch assembly / Normal or Abnormal

Normal

-

Status of Stop Light Relay

Status of stop light control relay (VSC ACC) / Normal or Abnormal

Normal

-

Status of Vehicle Speed Signal

Status of vehicle speed signal / Valid or Invalid

Valid

-

Mounting Information of Yaw/G Sensor

Installation information of yaw rate and acceleration sensor (airbag sensor assembly) / Connecter Vehicle Front Side or Connecter Vehicle Rear Side

Connector Vehicle Rear Side: Yaw rate and acceleration sensor (airbag sensor assembly) connector is located on side facing rear of vehicle

-

Status of G Sensor 0 Point Calibration

Status of acceleration sensor zero point calibration / Complete or Incomplete

Complete

-

Status of Yaw/G Sensor Power Supply Range

Status of yaw rate and acceleration sensor (airbag sensor assembly) supply range / Valid or Invalid

Valid

-

Status of G Sensor Communication

Status of acceleration sensor (airbag sensor assembly) communication / Normal or Abnormal

Normal

-

Status of G Sensor Output

Status of acceleration sensor (airbag sensor assembly) output / Valid or Invalid

Valid

-

Status of ABS Control (FR Wheel)

Status of front wheel RH ABS control / OFF or ON

OFF: Control not operating

ON: Control operating

-

Status of ABS Control (FL Wheel)

Status of front wheel LH ABS control / OFF or ON

OFF: Control not operating

ON: Control operating

-

Status of ABS Control (RR Wheel)

Status of rear wheel RH ABS control / OFF or ON

OFF: Control not operating

ON: Control operating

-

Status of ABS Control (RL Wheel)

Status of rear wheel LH ABS control / OFF or ON

OFF: Control not operating

ON: Control operating

-

G Sensor Value

Acceleration sensor (airbag sensor assembly) reading / Min.: -18.375 m/s2, Max.: 18.387 m/s2

-

  • Displays a negative value during deceleration and a positive value during acceleration
  • During deceleration/acceleration: Changes continuously

Vehicle Speed

Maximum wheel speed sensor reading / Min.: 0.00 km/h (0.00 mph), Max.: 327.67 km/h (203.61 mph)

Vehicle stopped: 0 km/h (0 mph)

When driving at constant speed: No large fluctuations

TBC Output Voltage

Trailer brake output voltage / min.: 0.000 V, max.: 18.000 V

-

Changes according to brake pedal and manual trailer brake output slider operation when a trailer is connected

Command Value Trailer Brake Output

Trailer brake output intensity / min.: 0%, max.: 100%

-

Changes according to brake pedal and manual trailer brake output slider operation when a trailer is connected

Trailer Brake Light

Trailer brake light / ON or OFF

OFF: Always

No trailer brake light on the combination meter assembly

Battery Voltage

Battery voltage / min.: 0.000 V, max.: 18.000 V

11 to 14 V

-

Gain Value

Gain value / min.: 0.0, max.: 10.0

Gain value set when GAIN (+/-) selection button is operated

-

Trailer Brake Type

Trailer brake type / Noconnection, Electric (Trailer Lightweight Type), Electric Over Hydraulic (Trailer Lightweight Type), Electric (Trailer Heavyweight Type), Electric Over Hydraulic (Trailer Heavyweight Type) or TBC OFF

Condition of selected trailer brake type

HINT:

  • Electric (Trailer Lightweight Type): Electric (0-4999lb)
  • Electric Over Hydraulic (Trailer Lightweight Type): Electric-Over-Hydraulic (0-4999lb)
  • Electric (Trailer Heavyweight Type): Electric (5000+lb),
  • Electric Over Hydraulic (Trailer Heavyweight Type): Electric-Over-Hydraulic (5000+lb)

Status of Manual Brake Slider Stuck

Status of manual trailer brake output slider/ Not Stuck or Stuck

Not Stuck

-

Status of Manual Brake Slider Circuit

Status of manual trailer brake output slider circuit / Normal or Open or Short

Normal

-

Manual Brake Slider Sensor Output Value Comparison Result

Manual trailer brake output slider sensor output valve comparison result / Normal or Abnormal

Normal

-

Status of Gain Rocker Switch (+) Stuck

Status of GAIN (+) selection button stuck / Not Stuck or Stuck

Not Stuck

-

Status of Gain Rocker Switch (-) Stuck

Status of GAIN (-) selection button stuck / Not Stuck or Stuck

Not Stuck

-

Detail Code

Detail code / Min.: 0, Max.: 255

-

Number of information codes (INF code) output is displayed

The Number of DTCs

Number of DTC recorded / Min.: 0, Max.: 255

-

-

CLEAR FREEZE FRAME DATA AND INFORMATION

NOTICE:

Clearing the DTCs will also clear the Freeze Frame Data and information codes (INF codes).

(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) Clear the DTCs and Freeze Frame Data.

Click here

    Fail-safe Chart

    How To Proceed With Troubleshooting

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