Toyota Sienna Service Manual: Master Cylinder Pressure Sensor Malfunction
DTC C1246/46 Master Cylinder Pressure Sensor Malfunction
DESCRIPTION
Master cylinder pressure sensor is connected to the skid control ECU in the actuator.
INSPECTION PROCEDURE
1 READ VALUE ON INTELLIGENT TESTER (MASTER CYLINDER PRESSURE SENSOR)
(a) Connect the intelligent tester to the DLC3.
(b) Start the engine.
(c) Select the DATA LIST mode on the intelligent tester.
ABS / VSC: 
(d) Check that the brake fluid pressure value of the master cylinder pressure sensor indicated on the intelligent tester, changes when the brake pedal is depressed.
OK: Brake fluid pressure value should change.
NOTICE: When replacing the brake actuator assembly, perform zero point calibration (See page BC-70).
REPLACE BRAKE ACTUATOR ASSEMBLY
2 INSPECT SKID CONTROL ECU (STP1 TERMINAL)
(a) Disconnect the skid control ECU connector.
(b) Measure the voltage according to the value(s) in the table below
Standard voltage
NOTICE: When replacing the brake actuator assembly, perform zero point calibration (See page BC-70).
REPLACE BRAKE ACTUATOR ASSEMBLY
Low Battery Positive Voltage
DTC C1241/41 Low Battery Positive Voltage
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT ECU-IG FUSE
(a) Remove the ECU-IG fuse from the driver side J/B.
(b) Check continu ...
Open in Stop Light Switch Circuit
DTC C1249/49 Open in Stop Light Switch Circuit
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK STOP LIGHT SWITCH OPERATION
(a) Check that the stop light comes on when the brak ...
Other materials:
Preparation 2gr-fe cooling
SST
RECOMMENDED TOOLS
EQUIPMENT
COOLANT
Capacity
Classification
11.3 liters (12.0 US qts, 10.0 Imp. qts)
Use only "TOYOTA Super Long Life Coolant" or similar high quality
ethylene glycol based non-silicate, non-amine, non-nitrite, non-borate
coolant ...
Reassembly
1. INSTALL REAR SEAT STAY SUB-ASSEMBLY
Install the seat stay sub-assembly with the nut.
Torque: 5.5 N*m (56 kgf*cm, 49 in.*lbf)
2. INSTALL NO. 2 SEAT CUSHION SPRING ASSEMBLY
RH
3. INSTALL LOCUS CABLE RH
Install the locus cable RH with the nut.
Torque: 5.5 N*m (56 kgf*cm, ...
Evaporator temperature sensor (for rear air conditioning system)
ON-VEHICLE INSPECTION
1. INSPECT REAR A/C EVAPORATOR TEMPERATURE SENSOR
(a) Remove the rear evaporator temperature sensor.
(b) Disconnect the connector from the rear evaporator
temperature sensor.
(c) Measure the resistance according to the value(s) in
the table below.
Standard re ...