Toyota Tundra Service Manual: Data List / Active Test

Toyota Tundra Service Manual / Brake / Brake Control / Dynamic Control Systems / Trailer Brake Control System / 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 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.

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / Trailer Brake Controller / Data List.

(e) According to the display on the Techstream, read the Data List.

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 Votage #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

-

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

Displays trailer brake not connected condition on multi-information display

Battery Voltage

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

11 to 14 V

-

Manual Gain

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 Valve 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

-

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

Connecter 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

The Number of DTCs

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

-

-

2. PERFORM ACTIVE TEST

(a) Connect the trailer brake connector to the trailer socket.

(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 / Trailer Brake Controller / Active Test.

HINT:

The ignition switch must be turned to ON to proceed to the Active Test using the Techstream.

Trailer Brake Controller:

Tester Display

Test Part

Control Range

Diagnostic Note

Trailer Brake Output

Trailer brake output

0 to 100%

Can be operated in the following conditions

  • DTC C14A4 not output
  • Vehicle speed = 0 km/h (0 mph)

Trailer Brake No Connection

Displays trailer brake not connected condition on multi-information display

Display ON/OFF

Vehicle speed = 0 km/h (0 mph)

Electric Brake (Trailer Light Type)

Displays trailer type on multi-information display

(electric brake (trailer light type))

Display ON/OFF

Vehicle speed = 0 km/h (0 mph)

HINT:

Electric Brake (TrailerLight Type): Electric (0-4999lb)

Electric Over Hydraulic Brake (Trailer Light Type)

Displays trailer type on multi-information display

(electric over hydraulic brake (trailer light type))

Display ON/OFF

Vehicle speed = 0 km/h (0 mph)

HINT:

Electric Over Hydraulic Brake (Trailer Light Type): Electric-Over-Hydraulic (0-4999lb)

Electric Brake (Traile rHeavy Type)

Displays trailer type on multi-information display

(electric brake (trailer heavy type))

Display ON/OFF

Vehicle speed = 0 km/h (0 mph)

HINT:

Electric Brake (TrailerHeavy Type): Electric (5000+lb)

Electric Over Hydraulic Brake (Trailer Heavy Type)

Displays trailer type on multi-information display

(electric over hydraulic brake (trailer heavy type))

Display ON/OFF

Vehicle speed = 0 km/h (0 mph)

HINT:

Electric Over Hydraulic Brake (Trailer Heavy Type): Electric-Over-Hydraulic (5000+lb)

TBC OFF

Displays trailer brake control off condition on multi-information display

Display ON/OFF

Vehicle speed = 0 km/h (0 mph)

Trailer Brake Malfunction (See Dealer)

Displays trailer brake error message on multi-information display

Display ON/OFF

Vehicle speed = 0 km/h (0 mph)

Foot Brake Cooperation Abnormal

Displays trailer brake error message on multi-information display

(Error message related to foot brake operation)

Display ON/OFF

Vehicle speed = 0 km/h (0 mph)

Trailer Error

Displays trailer brake error message on multi-information display

(Error message related to trailer operation)

Display ON/OFF

Vehicle speed = 0 km/h (0 mph)

Gain Reset Request Electric Brake Error

Displays trailer brake message on multi-information display

(Gain reset request message to the electric brake system )

Display ON/OFF

Vehicle speed = 0 km/h (0 mph)

Gain Reset Request Electric Over Hydraulic Error

Displays trailer brake message on multi-information display

(Gain reset request message to the electric over hydraulic system)

Display ON/OFF

Vehicle speed = 0 km/h (0 mph)

Trailer Not Connected Error

Displays trailer brake message on multi-information display

(Message related to no trailer connection)

Display ON/OFF

Vehicle speed = 0 km/h (0 mph)

TBC OFF Error

Displays trailer brake message on multi-information display

(Message related to trailer brake function being off)

Display ON/OFF

Vehicle speed = 0 km/h (0 mph)

Gain Value

Displays gain value on multi-information display

1 to 20

Vehicle speed = 0 km/h (0 mph)

PWM Value

Displays trailer brake output on multi-information display

1 to 100

Vehicle speed = 0 km/h (0 mph)

HINT:

PWM: Pulse Width Modulation
    Stop Light Control Relay Malfunction (C1380)

    Diagnosis System

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