Toyota Tundra (2015 year). Manual — part 227

SYMPTOM

SUSPECTED AREA

SEE

PAGE

VSC OFF indicator light

abnormal (Remains on)

VSC OFF indicator light circuit

VSC actuator (skid control ECU)

VSC OFF indicator light

abnormal (Does not come on)

VSC OFF indicator light circuit

VSC actuator (skid control ECU)

AUTO LSD indicator light

abnormal (Remains on)

AUTO LSD indicator light circuit

VSC actuator (skid control ECU)

AUTO LSD indicator light

abnormal (Does not come on)

AUTO LSD indicator light circuit

VSC actuator (skid control ECU)

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: ...

Last Modified: 9-16-2014

6.6 U

Doc ID: RM000001MXB012X

Model Year: 2015

Model: Tundra

Prod Date Range: [08/2014 - ]

Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: TERMINALS OF ECU; 2015 MY Tundra

[08/2014 - ]

TERMINALS OF ECU

1. SKID CONTROL ECU

TERMINAL NO. (SYMBOLS)

TERMINAL DESCRIPTION

A17-16 (GND1)

Skid control ECU ground

A17-15 (STPO)

Stop light control relay (BRK NO. 1) signal input

A17-14 (PKB2)

Parking brake switch signal input

A17-13 (CANL)

Vehicle CAN communication line

A17-12 (CANH)

Vehicle CAN communication line

A17-11 (EXI2)

A.D.D. detection switch signal input (4WD)

A17-10 (D/G)

Diagnosis tester communication line

A17-9

No pin

A17-8 (IG1)

IG1 power supply

A17-7 (TS)

Sensor check input

A17-6 (STP2)

Stop light switch signal input

A17-5

No pin

A17-4 (CSW)

VSC OFF switch signal input

A17-3 (SP1)

Vehicle speed pulse signal output

A17-2

No pin

A17-1 (+BM)

Motor relay power supply

A17-31 (BST)

Brake booster solenoid ground

A17-30 (PIM)

Pedal stroke sensor (Delta S sensor) input line

A17-29 (GYAW)

Yaw rate sensor ground

A17-28

No pin

A17-27 (E3)

Pedal stroke sensor (Delta S sensor) ground

A17-26 (VCP)

Pedal stroke sensor (Delta S sensor) power source

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: ...

TERMINAL NO. (SYMBOLS)

TERMINAL DESCRIPTION

A17-25

No pin

A17-24 (PSNO)

Brake booster micro switch (Normal Open) signal input

A17-23 (PSNC)

Brake booster micro switch (Normal Close) signal input

A17-22 (VYS)

Yaw rate sensor power source

A17-21 (STS)

Brake booster micro switch power source

A17-20

No pin

A17-19 (SS2)

Yaw rate sensor signal line

A17-18 (SS1)

Yaw rate sensor signal line

A17-17 (BSTP)

Brake booster solenoid power source

A17-47

No pin

A17-46 (FL-)

Front wheel LH speed signal line

A17-45 (FL+)

Front wheel LH speed signal line

A17-44 (BSW)

Stop light control relay (BRK NO. 2) drive input

A17-43 (RR+)

Rear wheel RH speed signal line

A17-42 (RR-)

Rear wheel RH speed signal line

A17-41

No pin

A17-40

No pin

A17-39

No pin

A17-38 (STP)

Stop light switch signal input

A17-37 (RL-)

Rear wheel LH speed signal line

A17-36 (RL+)

Rear wheel LH speed signal line

A17-35

No pin

A17-34 (FR+)

Front wheel RH speed signal line

A17-33 (FR-)

Front wheel RH speed signal line

A17-32 (+BS)

Solenoid relay power supply

2. CHECK SKID CONTROL ECU

(a) Disconnect the A17 ECU connector.

(b) Measure the voltage or resistance according to the value(s) in the table below.

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: ...

HINT:

Voltage cannot be measured with the connector connected to the skid control ECU as the connector is

watertight.

TERMINAL NO.

(SYMBOLS)

WIRING

COLOR

TERMINAL DESCRIPTION

CONDITION

SPECIFIED

CONDITION

A17-16 (GND1) - Body

ground

W-B - Body

ground

Skid control ECU ground

Always

Below 1 Ω

A17-15 (STPO) - Body

ground

BR - Body

ground

Stop light control relay (BRK NO.

1) signal input

Ignition switch ON

11 to 14 V

A17-14 (PKB2) - Body

ground

LG - Body

ground

Parking brake switch signal input

Parking brake

switch ON

Below 1 Ω

A17-11 (EXI2) - Body

ground

GR - Body

ground

A.D.D. detection switch signal

input (4WD)

A.D.D. detection

switch ON

Below 1 Ω

A17-10 (D/G) - J17-7

(SIL)

R - BR

Diagnosis tester communication

line

Always

Below 1 Ω

A17-8 (IG1) - Body

ground

V - Body

ground

IG1 power supply

Ignition switch ON

11 to 14 V

A17-7 (TS) - J17-12

(TS)

W - G

Sensor check input

Always

Below 1 Ω

A17-6 (STP2) - Body

ground

GR - Body

ground

Stop light switch signal input

Brake pedal

depressed

8 to 14 V

Brake pedal

released

Below 1.5 V

A17-4 (CSW) - Body

ground

P - Body

ground

VSC OFF switch signal input

VSC OFF switch

ON

Below 1 Ω

A17-3 (SP1) - Body

ground

G - Body

ground

Vehicle speed pulse signal

output

Always

11 to 14 V

A17-1 (+BM) - Body

ground

L - Body

ground

Motor relay power supply

Always

11 to 14 V

A17-31 (BST) - A17-17

(BSTP)

B - V

Brake booster solenoid ground

Always

1 to 2 Ω

A17-30 (PIM) - A17-27

(E3)

R - BE

Pedal stroke sensor (Delta S

sensor) input line

Always

4 to 8 kΩ

for 4WD:

A17-29 (GYAW) -

P16-5 (GYAW)

P - G

Yaw rate sensor ground

Always

Below 1 Ω

for 2WD:

A17-29 (GYAW) -

P15-5 (GYAW)

A17-27 (E3) - Body

ground

BE - Body

ground

Pedal stroke sensor (Delta S

sensor) ground

Always

10 kΩ or higher

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: ...