Toyota Sequoia (2005). Manual - part 297

F16958

ABS & VSC Actuator
(Skid Control ECU )

M2 
Master Cylinder Pressure 
Sensor No. 1

VCM

PMC

E1

30

28

29

S1

26

25

27

S1

S1

S1

S1

S1

VCM2

PMC2

E2

B

R

W

3

2

1

VCM

PMC

E1

M3 
Master Cylinder Pressure 
Sensor No. 2

3

2

1

VCM2

PMC2

E2

B

R

W

(Shielded)

(Shielded)

J28
J/C

A

A

A

A

W–B

Instrument Panel J/B

W–B

J8
J/C

IE

1F

1K

9

12

BR

BR

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–983

1177

DTC

C1360 / 61

Malfunction in Master Cylinder Pres-
sure Sensor

CIRCUIT DESCRIPTION

The master cylinder pressure sensors are connected to the skid control ECU.
Attached to the master cylinder: one reads front master cylinder pressure and the other reads rear master
cylinder pressure.

DTC No.

DTC Detecting Condition

Trouble Area

C1360 / 61

When any of the following conditions are detected:

1. Noise to ECU terminal PMC occurs.

2. While ECU terminal STP is OFF, ECU terminal PMC

voltage is out of standard range.

3. When ECU terminal IG1 voltage is proper, ECU terminal

VCM voltage is out of range.

4. When ECU terminal VCM voltage is proper, ECU termi-

nal PMC voltage is out of range.

Master cylinder pressure sensor

Master cylinder pressure sensor circuit

WIRING DIAGRAM

DI93V–05

DI–984

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1178

INSPECTION PROCEDURE

1

Is pedal lowered or spongy?

YES

Bleed air from the system (See page 

BR–4

).

NO

2

Check output value of the master cylinder pressure sensor No. 1 and No. 2.

PREPARATION:
(a)

Connect the hand–held tester to the DLC3.

(b)

Turn the ignition switch to the ON position, and push the hand–held tester main switch ON.

(c)

Select DATA LIST mode on the hand–held tester.

CHECK:
Check that the brake fluid pressure value of the master cylinder pressure sensor displayed on the hand–held
tester changes when depressing the brake pedal.

Item

Measurement Item /

Range (Display)

Normal Condition

Diagnostic Note

MAS CYL PRS 1

Master cylinder pressure
sensor 1 reading / min.: 0
V, max.: 5 V

When brake pedal is re-
leased : 0.3 to 0.9 V

Reading increases when
brake pedal is depressed

MAS CYL PRS 2

Master cylinder pressure
sensor 1 reading / min.: 0
V, max.: 5 V

When brake pedal is re-
leased : 0.3 to 0.9 V

Reading increases when
brake pedal is depressed

OK:

Brake fluid pressure value changes.

OK

Go to step 4.

NG

3

Check for open and short circuit in harness and connector between master cyl-
inder pressure sensor and skid control ECU (See page 

IN–35

).

NG

Repair or replace harness or connector.

OK

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–985

1179

4

Replace master cylinder pressure sensor and check DTC once more.

PREPARATION:
(a)

Replace the master cylinder pressure sensor (See page 

BR–16

).

(b)

Clear the DTC (See page 

DI–911

).

(c)

Turn the ignition switch OFF.

CHECK:
Turn the ignition switch to the ON position, and check if the same DTC is stored in the memory.
RESULT:

DTC is output

A

DTC is not output

B

B

END

A

Replace skid control ECU 
(See page 

BR–52

).

NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page 

DI–897

).

DI–986

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1180

DTC

C1361 / 62

Abnormal Battery Voltage of VSC Sen-
sor

CIRCUIT DESCRIPTION

Supplies power to the VSC sensors (yaw rate and master cylinder pressure sensors) through terminal IG1.

DTC No.

DTC Detecting Condition

Trouble Area

C1361/62

Voltage from VSC sensor system to ECU is abnormal.

Battery

Charging system

Power source circuit

Skid control ECU

Yaw rate (deceleration) sensor

Master cylinder pressure sensor

DIDME–01