2001 TOYOTA SEQUOIA ECU
[x] Cancel search: ECUPage 1118 of 4323
DIDM4±01
DI±916
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
111 0 Author: Date:
2005 SEQUOIA (RM1146U)
FAIL±SAFE CHART
1. FAIL SAFE OPERATION
If there is a problem with sensor signals or actuator systems, the skid control ECU prohibits power supply
to the ABS & VSC actuator and informs the ECM of VSC system failure.
The ABS & VSC actuator turns off each solenoid and the ECM shuts off VSC control (traction control signal)
from the skid control ECU accordingly, which turns out to be as if the ABS, VSC and TRAC systems were
not installed.
The ABS, VSC, and TRAC control will be prohibited, but EBD control continues as much as possible. If EBD
control is impossible, the brake warning light comes on to warn the driver (See page DI±910).
MalfunctionSymptom
ABS systemABS, BA, TRAC, and VSC control prohibited
BA systemABS, BA, TRAC, and VSC control prohibited
EBD systemABS & EBD control prohibited
TRAC systemTRAC and VSC control prohibited
VSC systemTRAC and VSC control prohibited
HINT:
A malfunction in either the ABS or BA system will result in an identical operation, with ABS, BA, TRAC,
and VSC system control prohibited.
If control is prohibited due to a malfunction during operation, control will be disabled gradually. This
is to avoid sudden vehicle instability.
Page 1120 of 4323
DI±918
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
111 2 Author: Date:
2005 SEQUOIA (RM1146U)
DECELERAT SEN
Deceleration sensor 1
reading / min.: ±1.869 G,
max.: 1.869 GApproximately 0 ± 0.13 G
at still conditionReading changes when ve-
hicle is bounced
DECELERAT SEN2
Deceleration sensor 2
reading / min.: ±1.869 G,
max.: 1.869 GApproximately 0 ± 0.13 G
at still conditionReading changes when ve-
hicle is bounced
IG VOLTAGE
ECU power supply voltage
/ TOO LOW / NORMAL /
TOO HIGHTOO LOW : 9.5 V or less
NORMAL : 9.5 to 14.0 V
TOO HIGH : 14.0 V or
more
±
SFRRABS solenoid (SFRR) / ON
or OFFON : Operated
OFF : Not operated±
SFRHABS solenoid (SFRH) / ON
or OFFON : Operated
OFF : Not operated±
SFLRABS solenoid (SFLR) / ON
or OFFON : Operated
OFF : Not operated±
SFLHABS solenoid (SFLH) / ON
or OFFON : Operated
OFF : Not operated±
SRRR (SRR)ABS solenoid (SRRR
(SRR)) / ON or OFFON : Operated
OFF : Not operated±
SRRH (SRH)ABS solenoid (SRRH
(SRH)) / ON or OFFON : Operated
OFF : Not operated±
SRLRABS solenoid (SRLR) / ON
or OFFON : Operated
OFF : Not operated±
SRLHABS solenoid (SRLH) / ON
or OFFON : Operated
OFF : Not operated±
SRMR (SMCR, STR)SRMR (SMCR, STR) / ON
or OFFON : Operated
OFF : Not operated±
SRMF (SMCF SA3)SRMF (SMCF, SA3) / ON
or OFFON : Operated
OFF : Not operated±
SRCR (SA2)SRCR (SA2) / ON or OFFON : Operated
OFF : Not operated±
SRCF (SA1)SRCF (SA1) / ON or OFFON : Operated
OFF : Not operated±
YAW RATE
Yaw rate sensor/
Min.: ±128 deg/s, Max.:
127 deg/sMin.: ±128 deg/s
Max.: 128 deg/s±
YAW ZERO VALUE
Memorized zero value/
Min.: ±128 deg/s, Max.:
127 deg/sMin.: ±128 deg/s
Max.: 128 deg/s±
STEERING ANG
Steering sensor/
Min.: ±1152 deg,
Max.: 1150.875 degLeft turn: Increase
Right turn: Decrease±
MAS CYL PRS 1
Master cylinder pressure
sensor 1 reading / min.: 0
V, max.: 5 VWhen brake pedal is re-
leased : 0.3 to 0.9 VReading increases when
brake pedal is depressed
MAS CYL PRS 2
Master cylinder pressure
sensor 2 reading / min.: 0
V, max.: 5 VWhen brake pedal is re-
leased: 0.3 to 0.9 VReading increases when
brake pedal is depressed
PEDAL STROKEPedal Stroke Sensor min.:
0, max.: 5.1Approximately 2.0 V with-
out the brake pedal de-
pressed
±
Page 1123 of 4323
DI93C±06
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±921
111 5 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
NOTICE:
When removing parts, turn the ignition switch OFF.
When replacing the master cylinder, yaw rate and deceleration sensors and/or the ECU, make
sure to perform master cylinder, yaw rate and deceleration sensors' zero point calibration (See
page DI±897).
HINT:
Using SST 09843±18040, connect terminals Tc and CG.
If no abnormality is found when inspecting parts, inspect the ECU.
If a trouble code is displayed during the DTC check, check the circuit listed for that code. For details
of each code, turn to the page referred to under the ºSee pageº for respective ºDTC No.º in the DTC
chart.
DTC chart of ABS system:
DTC No.
(See Page)Detection ItemTrouble Area
C0200/31*1
(DI±925)Right front wheel speed sensor signal malfunction
C0205/32*1
(DI±925)Left front wheel speed sensor signal malfunctionRight front, left front, right rear and left rear speed sensor
Each speed sensor circuit
C0210/33*1
(DI±925)Right rear wheel speed sensor signal malfunction
Each s eed sensor circuit
Speed sensor rotor
Skid control ECU
C0215/34*1
(DI±925)Left rear wheel speed sensor signal malfunction
C0226/21
(DI±932)Malfunction in ABS & VSC solenoid valvesABS & VSC actuator
ABS & VSC solenoid circuit
C0278/11
(DI±934)Open or short circuit in ABS & VSC relay circuit
ABS & VSC solenoid relay
ABS & VSC solenoid relay circuit
ABS & VSC motor relay
ABS & VSC motor relay circuit
C1241/41
(DI±957)Low battery positive voltage or abnormally high battery positive
voltage
Battery
Charging system
Power source circuit (+BM, +BS)
Skid control ECU
C1244/44
(DI±951)Open or short circuit in deceleration sensor circuitYaw rate (deceleration) sensor
Yaw rate (deceleration) sensor circuit
C1247/47
(DI±960)Malfunction in delta S sensor
Delta S sensor
Delta S sensor circuit
Skid control ECU
Brake booster
C1249/49
(DI±963)Open circuit in stop light switch circuit
Stop light switch
Stop light switch circuit
Skid control ECU
C1251/51*1
(DI±966)
Pump motor is locked
Open circuit in pump motor circuitABS & VSC actuator
C1337/37
(DI±975)Some tires are different in size from the other tiresTire size
Always ON
(DI±1016)Malfunction in skid control ECU
Battery
Charging system
Power source circuit
ABS warning light circuit
Skid control ECU
Page 1124 of 4323
DI±922
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
111 6 Author: Date:
2005 SEQUOIA (RM1146U)
*1: As long as the following operations are not performed, the ABS warning light will not go OFF only by re-
pairing the trouble area.
(1) Drive the vehicle at 12 mph (20 km/h) for 30 seconds or more and check that the ABS warning light goes
off.
(2) Clear the DTC (See page DI±911).
HINT:
There is a possibility that the hand±held tester cannot be used when the ABS warning light is always ON.
DTC chart of VSC system:
DTC No.
(See Page)Detection ItemTrouble Area
C1201/51
(DI±936)Engine control system malfunctionEngine control system
C1202/52
(DI±937)Brake fluid level warning switch circuit
Brake fluid level
Brake fluid level warning switch
Brake fluid level warning switch circuit
Skid control ECU
CAN1 communication system
Translate ECU
C1203/53 *1
(DI±942)Malfunction in CAN1 communication
Skid control ECU
CAN1 communication system
ECM
Translate ECU
C1207/37
(DI±522)Reverse gear signal failureECT
C1223/43
(DI±945)Malfunction in ABS control systemABS control system
C1231/31
(DI±946)Malfunction in steering angle sensor
Steering angle sensor
Steering angle sensor communication circuit
Skid control ECU
Translate ECU
CAN communication system
C1232/32
(DI±951)Malfunction in deceleration sensorYaw rate (deceleration) sensor
Yaw rate (deceleration) sensor circuit
C1234/34
(DI±954)Malfunction in yaw rate sensorYaw rate (deceleration) sensor
Yaw rate (deceleration) sensor circuit
C1310/11
(DI±969)Open or short circuit in active brake booster solenoid circuitBrake booster
Active brake booster solenoid circuit
C1311/12
(DI±971)Open or short circuit in brake inhibit relay circuitBrake inhibit relay
Brake inhibit relay circuit
1335/35
(DI±946)Malfunction in steering angle sensor communication circuit
Steering angle sensor
Steering angle sensor communication circuit
Skid control ECU
Translate ECU
CAN1 communication system
C1340/47*2
(DI±977)Center diff. lock circuit malfunction
Center diff. lock position switch
Center diff. lock position switch circuit
Center diff. lock indicator light circuit
Translate ECU
C1360/61
(DI±983)Malfunction in master cylinder pressure sensorMaster cylinder pressure sensor
Master cylinder pressure sensor circuit
Page 1125 of 4323
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±923
111 7 Author: Date:
2005 SEQUOIA (RM1146U)C1361/62
(DI±986)
Abnormal battery voltage of VSC sensor
Battery
Charging system
Power source circuit
Yaw rate (deceleration) sensor
Skid control ECU
Master cylinder pressure sensor
C1362/36
(DI±990)Malfunction in sensor offset value (VSC sensor system)Skid control ECU
(Perform zero point calibration)
C1363/63
(DI±991)Malfunction in booster pedal force switchBooster pedal force switch (Active brake booster)
Booster pedal force switch (Active brake booster) circuit
U0100/65
(DI±1075)Malfunction in vehicle CAN communication systemVehicle CAN communication system
HINT:
There is a possibility that the hand±held tester cannot be used when the VSC TRAC warning light is always
ON.
*
1: Check DTC chart C1203/53 first, then troubleshoot according to the DTC chart of translate ECU if neces-
sary.
*
2:
4WD
DTC chart of translate ECU (When DTC ºC1201/51, C1202/52, C1203/53 or U0100/65º of VSC system
is output):
DTC No.
(See Page)Detection ItemTrouble Area
Normal code*
(DI±1013)Malfunction in ECM control system or suspension control ECU
ECM circuit
ECM
Brake fluid level
Brake fluid level warning switch circuit
Steering angle sensor
Translate ECU
Skid control ECU
Vehicle CAN
VSC+, VSC± circuit (CAN1 communication system)
51
(DI±995)Malfunction in ECM control systemECM
53
(DI±998)Malfunction in CAN1 communication
VSC+, VSC± circuit (CAN1 communication system)
Skid control ECU
Translate ECU
58
(DI±1002)Malfunction of brake fluid level switch
Brake fluid level warning switch circuit
Brake fluid level warning switch
Brake fluid reservoir level
Translate ECU
65
(DI±1005)Malfunction 1 of vehicle CAN
ENG+, ENG± circuit (CAN communication system)
ECM
Translate ECU
Suspension control ECU
94
(DI±1009)Malfunction 2 of vehicle CAN
ENG+, ENG± circuit (CAN communication system)
ECM
Translate ECU
Suspension control ECU
Non±code
(DI±1015)Malfunction in translate ECU
Brake warning light circuit
Tc terminal circuit
Translate ECU
*: Translate ECU is normal.
Page 1127 of 4323
DI93G±05
BR3583
BR3582F00010
RotorSpeed Sensor
Magnet
To ECU
+V
±VHigh Speed
Low Speed
CoilNS
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±925
111 9 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
DTC
C0200 / 31 ± C0215 / 34Speed Sensor Circuit
CIRCUIT DESCRIPTION
The speed sensor detects wheel speed and sends the ap-
propriate signals to the ECU. These signals are used to control
the ABS control system. The front and rear rotors have 48
serrations each.
When the rotors rotate, the magnetic field emitted by the perma-
nent magnet in the speed sensor generates AC voltage. Since
the frequency of this AC voltage changes in direct proportion to
the speed of the rotor, the frequency is used by the ECU to de-
tect the speed of each wheel.
DTC No.DTC Detecting ConditionTrouble Area
C0200 / 31
C0205 / 32
C0210 / 33
C0215 / 34
When any of the following is detected:
1. During driving, speed sensor signals are not input for a
fixed time.
2. Momentary interruption in speed sensor signals occurs
many times during driving.
3. Abnormal signal occurs in pulse signal from speed sen-
sor during driving.
4. Speed sensor signal circuit continues to be open for a
fixed time.
Right front, left front, right rear and left rear speed sensor
Each speed sensor circuit
Sensor rotor
Skid control ECU
HINT:
DTC No. C0200 / 31 is for the right front speed sensor.
DTC No. C0205 / 32 is for the left front speed sensor.
DTC No. C0210 / 33 is for the right rear speed sensor.
DTC No. C0215 / 34 is for the left rear speed sensor.
Page 1128 of 4323
F19767
ABS & VSC Actuator
(Skid Control ECU)
A7
ABS Speed Sensor
Front RH
33 46
34 2
1
12FL±FR±
RR+FL+
RR±RL+
RL± 2
1FR+ S1
S1
S1
S1
S1
S1
S1
S142
43
36 37
1 2 A32
ABS Speed Sensor
Rear LH
A33
ABS Speed Sensor
Rear RHA6
ABS Speed Sensor
Front LH45 V
P
L
LG
G G G
G
R±B R±B R±B
R±B BB26
IL114
BB2
BB2
BB2IL1
IL1
IL113 5
8
7O O O O
YY
YY 6
5 IJ32
IJ3 13
IJ31
IJ3 12 DI±926
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1120 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
Page 1131 of 4323
BR3795OKNG
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±929
1123 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check for open and short circuit in harness and connector between each speed
sensor and skid control ECU (See page IN±35).
NG Repair or replace harness or connector.
OK
4 Check sensor installation.
CHECK:
Check the speed sensor installation.
OK:
The installation bolt is tightened properly and there is
no clearance between the sensor and the front steer-
ing knuckle or the rear axle carrier.
Torque: 8.0 N´m (82 kgf´cm, 71 in.´lbf)
NG Replace speed sensor
(See page BR±56 or BR±59).
NOTICE:
Check the speed sensor signal after replacement (See
page DI±899).
OK