2007 TOYOTA SIENNA fuse

BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–109
BC
DESCRIPTION
The ABS motor relay supplies power to the ABS pump motor. While the ABS & TRAC & VSC are
activated, the ECU switches the ABS motor relay ON and operates the ABS pump motor.
DTC C0273/13Open or Short Circuit in ABS Motor Relay Cir-
cuit
DTC C0274/14 Short to B+ in ABS Motor Relay Circuit
DTC C1361/91Short Circuit in ABS Motor Fail Safe Relay Cir-
cuit
DTC Code DTC Detection Condition Trouble Area
C0273/13When either of the following is detected:
1. All of the following conditions continue for 0.12 sec.
or more.
– The IG1 terminal voltage is between 9.5 and
18.5 V.
– During initial check and ABS, BA, TRAC, or
VSC are operating.
– Relay contact is open when the relay is ON.
2. Both of the following conditions continue for 0.12
sec.
– The IG1 terminal voltage is 9.5 V or less.
– Relay contact remains open when the relay is
ON.• ABS 1 fuse
• VSC MTR relay
• VSC MTR relay circuit
C0274/14When pump motor relay is turned off, relay contact is
"ON" for 4 sec. or more.• ABS 1 fuse
• VSC MTR relay
• VSC MTR relay circuit
C1361/91Immediately after IG1 terminal is turned ON, when
pump motor fail safe relay is tuned OFF, the relay
contact is "ON" for 4 sec. or more.• ABS 1 fuse
• VSC FAIL relay
• VSC FAIL relay circuit

BC–112BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
OK
(a) Check for open or short circuit in harness and connector
between the ABS motor relay and skid control ECU.
NG
OK
(a) Clear the DTCs.
(b) Drive the vehicle at a speed of 6 km/h (4 mph) or more.
(c) Check if the same DTCs are recorded (See page BC-
82).
Result
HINT:
• The skid control ECU inspects the motor relay circuit
when the stop light switch is turned off and the vehicle
is running at a speed of 6 km/h (4mph) or more.
• It is suspect that the DTCs output was caused by the
poor connection of the connector terminal.
B
A
(a) Remove the ABS 1 fuse from the FL block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
NG
OK
4CHECK HARNESS AND CONNECTOR (ABS MOTOR RELAY - SKID CONTROL ECU)
REPAIR OR REPLACE HARNESS OR
CONNECTOR
5RECONFIRM DTC
Result Proceed to
DTC is outputA
DTC is not outputB
PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
REPLACE BRAKE ACTUATOR ASSEMBLY
6INSPECT ABS 1 FUSE
Tester Connection Specified Condition
ABS 1 fuse Below 1
REPLACE ABS 1 FUSE

BC–114BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
DESCRIPTION
The ABS solenoid relay is built in the brake actuator assembly. This relay supplies power to each ABS
solenoid. If the initial check is OK, after the ignition switch is turned to the ON position, the relay goes on.
WIRING DIAGRAM
Refer to DTCs C0226/21, C0236/22, C0246/23 and C0256/24 (See page BC-105).
INSPECTION PROCEDURE
(a) Remove the ABS 2 fuse from the FL block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
NG
OK
(a) Disconnect the skid control ECU connector.
(b) Turn the ignition switch to the ON position.
DTC C0278/11Open or Short Circuit in ABS Solenoid Relay
Circuit
DTC C0279/12 Short to B+ in ABS Solenoid Relay Circuit
DTC Code DTC Detection Condition Trouble Area
C0278/11When either of the following is detected:
1. Both of the following conditions continue for 0.2
sec. or more.
– The IG1 terminal voltage is between 9.5 and
18.5 V.
– The solenoid relay contact is open when the
relay is turned on.
2. Both of the following conditions continue for 0.2
sec. or more.
– IG1 terminal voltage becomes lower than 9.5 V
or less when the relay is turned on.
– The relay contact remains open.• ABS 2 fuse
• ABS SOL relay
• ABS SOL relay circuit
• Brake actuator assembly
C0279/12Immediately after IG1 is turned ON, when solenoid
relay is turned OFF, relay contact is "ON" for 0.2 sec. or
more.• ABS 2 fuse
• ABS SOL relay
• ABS SOL relay circuit
• Brake actuator assembly
1INSPECT ABS 2 FUSE
Tester Connection Specified condition
ABS 2 fuse Below 1
REPLACE ABS 2 FUSE
2INSPECT SKID CONTROL ECU

BC–128BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
(a) Remove the ECU-IG fuse from the driver side J/B.
DTC C1241/41 Low Battery Positive Voltage
DTC Code DTC Detection Condition Trouble Area
C1241/41When any of the following is detected:
1. At a vehicle speed of 3 km/h (2mph) or more, the
IG1 terminal voltage is 9.5 V or less for 10 sec. or
more.
2. When the solenoid relay remains ON and the IG1
terminal voltage is 9.5 V or less, the relay contact is
open for 0.2 sec. or more.
3. While the motor fail safe relay is ON after motor
relay ON, the IG1 terminal voltage is 9.5 V or less
and the actuator pump drive motor is OFF for 0.1
sec. or more.•Battery
• Charging system
• Power source circuit
1INSPECT ECU-IG FUSE
F045116E06

BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–129
BC
(b) Check continuity of the ECU-IG fuse.
Standard resistance
NG
OK
(a) Check the positive battery voltage.
Standard voltage:
11 to 14 V
NG
OK
(a) WHEN USING INTELLIGENT TESTER:
(1) Connect the intelligent tester to the DLC3.
(2) Start the engine.
(3) Select the DATA LIST mode on the intelligent tester.
ABS / VSC:
(4) Check that the voltage condition output from the
ECU displayed on the intelligent tester.
OK:
"Normal" is displayed.
(b) WHEN NOT USING INTELLIGENT TESTER:
(1) Disconnect the skid control ECU connector.
(2) Turn the ignition switch to the ON position.
(3) 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).
NG
F045093E09
Tester Connection Specified condition
ECU-IG Fuse Below 1
REPLACE ECU-IG FUSE
2CHECK BATTERY
CHECK OR REPLACE CHARGING SYSTEM
OR BATTERY
3INSPECT SKID CONTROL ECU (IG1 TERMINAL)
Tester Display Measurement Item/Range Normal Condition
IG VOLTAGEECU power supply voltage / UNDER /
NORMALNORMAL: 9.5 V or over
UNDER: Below 9.5 V
G024767E42
Tester Connection Specified Condition
S3-46 (IG1) - S3-32 (GND1) 10 to 14 V
S3-46 (IG1) - S3-1 (GND2) 10 to 14 V
Go to step 4

BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEMBC–17
BC
DIAGNOSTIC TROUBLE CODE CHART
HINT:
• If a trouble code is displayed during the DTC check, check
the circuit indicated by the DTC. For details of each code,
turn to the page for the respective DTC Code. in the DTC
chart.
• Inspect the fuse and relay before investigating the trouble
areas as shown in the table below.
DTC chart of ABS:
DTC Code Detection Item Trouble Area See page
C0200/31 Front Speed Sensor RH Circuit1. Front speed sensor RH
2. Front speed sensor RH circuit
3. Speed sensor rotor
4. Sensor installation
5. Brake actuator assemblyBC-17
C0205/32 Front Speed Sensor LH Circuit1. Front speed sensor LH
2. Front speed sensor LH circuit
3. Speed sensor rotor
4. Sensor installation
5. Brake actuator assemblyBC-17
C0210/33 Rear Speed Sensor RH Circuit1. Rear speed sensor RH
2. Rear speed sensor RH circuit
3. Speed sensor rotor
4. Sensor installation
5. Brake actuator assemblyBC-23
C0215/34 Rear Speed Sensor LH Circuit1. Rear speed sensor LH
2. Rear speed sensor LH circuit
3. Speed sensor rotor
4. Sensor installation
5. Brake actuator assemblyBC-23
C0226/21 SFR Solenoid Circuit1. SFRH or SFRR circuit
2. Brake actuator assemblyBC-29
C0236/22 SFL Solenoid Circuit1. SFLH or SFLR circuit
2. Brake actuator assemblyBC-29
C0246/23 SRR Solenoid Circuit1. SRRH or SRRR circuit
2. Brake actuator assemblyBC-29
C0256/24 SRL Solenoid Circuit1. SRLH or SRLR circuit
2. Brake actuator assemblyBC-29
C0273/13 Open in ABS Motor Relay Circuit1. ABS 1 fuse
2. ABS motor relay
3. ABS motor relay circuit
4. Brake actuator assemblyBC-31
C0274/14Short to B+ in ABS Motor Relay
Circuit1. ABS 1 fuse
2. ABS motor relay
3. ABS motor relay circuit
4. Brake actuator assemblyBC-31
C0278/11Open in ABS Solenoid Relay
Circuit1. ABS 2 fuse
2. ABS solenoid relay
3. ABS solenoid relay circuit
4. Brake actuator assemblyBC-34
C0279/12Short to B+ in ABS Solenoid
Relay Circuit1. ABS 2 fuse
2. ABS solenoid relay
3. ABS solenoid relay circuit
4. Brake actuator assemblyBC-34
C1235/35Foreign Object is Attached on Tip
of Front Speed Sensor RH1. Front speed sensor RH
2. Speed sensor rotor
3. Sensor installation
4. Brake actuator assemblyBC-17

BC–18BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEM
BC
Test Mode DTC of ABS:
C1236/36Foreign Object is Attached on Tip
of Front Speed Sensor LH1. Front speed sensor LH
2. Speed sensor rotor
3. Sensor installation
4. Brake actuator assemblyBC-17
C1238/38Foreign Object is Attached on Tip
of Rear Speed Sensor RH1. Rear speed sensor RH
2. Speed sensor rotor
3. Sensor installation
4. Brake actuator assemblyBC-23
C1239/39Foreign Object is Attached on Tip
of Rear Speed Sensor LH1. Rear speed sensor LH
2. Speed sensor rotor
3. Sensor installation
4. Brake actuator assemblyBC-23
C1241/41 Low Battery Positive Voltage1. Battery
2. ECU-IG fuse
3. Charging system
4. Power source circuitBC-37
C1249/49 Open in Stop Light Switch Circuit1. Stop light switch
2. Stop light switch circuitBC-41
C1251/51 Open in Pump Motor Circuit1. ABS pump motor circuit
2. Brake actuator assemblyBC-45
DTC Code Detection Item Trouble Area See page
C1271/71Low Output Signal of Front Speed
Sensor RH (Test Mode DTC)1. Front speed sensor RH
2. Sensor installation
3. Speed sensor rotorBC-17
C1272/72Low Output Signal of Front Speed
Sensor LH (Test Mode DTC)1. Front speed sensor LH
2. Sensor installation
3. Speed sensor rotorBC-17
C1273/73Low Output Signal of Rear Speed
Sensor RH (Test Mode DTC)1. Rear speed sensor RH
2. Sensor installation
3. Speed sensor rotorBC-23
C1274/74Low Output Signal of Rear Speed
Sensor LH (Test Mode DTC)1. Rear speed sensor LH
2. Sensor installation
3. Speed sensor rotorBC-23
C1275/75Abnormal Change in Output
Signal of Front Speed Sensor RH
(Test Mode DTC)Speed sensor rotorBC-17
C1276/76Abnormal Change in Output
Signal of Front Speed Sensor LH
(Test Mode DTC)Speed sensor rotorBC-17
C1277/77Abnormal Change in Output
Signal of Rear Speed Sensor RH
(Test Mode DTC)Speed sensor rotorBC-23
C1278/78Abnormal Change in Output
Signal of Rear Speed Sensor LH
(Test Mode DTC)Speed sensor rotorBC-23 DTC Code Detection Item Trouble Area See page

BC–32BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEM
BC
(a) Clear the DTCs (See page BC-10).
(b) Start the engine.
(c) Drive the vehicle at the speed of 4 mph (6 km/h) or more.
(d) Check that the same DTCs are recorded (See page BC-
10).
HINT:
If a speed signal of 4 mph (6 km/h) or more is input to the
skid control ECU, with the ignition switch on and the stop
light switch off, the ECU performs self-diagnosis of the
motor and solenoid circuits.
Result
HINT:
• If any DTCs are output while jiggling a connector or
wire harness of the brake actuator (skid control ECU),
inspect and repair the connector or wire harness.
• If the normal system code is output, slightly jiggle the
connectors, wire harnesses, and fuses of the brake
actuator assembly. Make sure that no DTCs are
output.
• These DTCs may be stored due to a malfunction in
the connector terminal connection, etc.
B
A
Condition Proceed to
DTCs (C0226/21, C0236/22, C0246/23 and C0256/24) are output A
DTCs (C0226/21, C0236/22, C0246/23 and C0256/24) are not
outputB
END
REPLACE BRAKE ACTUATOR ASSEMBLY