DTC 1231 TOYOTA SEQUOIA 2001 Service Repair Manual
[x] Cancel search | Manufacturer: TOYOTA, Model Year: 2001, Model line: SEQUOIA, Model: TOYOTA SEQUOIA 2001Pages: 4323, PDF Size: 48.49 MB
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 1148 of 4323
DI±946
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1140 Author: Date:
2005 SEQUOIA (RM1146U)
DTCC1231 / 31, C1335 / 35Steering Angle Sensor Circuit
CIRCUIT DESCRIPTION
The steering angle sensor signal is sent to the skid control ECU via the CAN communication system. When
there is a malfunction in the communication system, the DTCs will be detected by the diagnosis function.
DTC No.DTC Detecting ConditionTrouble Area
C1231 / 31Data is not transmitted to the steering angle sensor for a
fixed time invalid steering angle sensor data.
Translate ECU
Steering angle sensor
Steering angle sensor communication circuit
Skid control ECU
CAN communication system
C1335 / 35
When the +BS terminal voltage is 9.5 V or more, data trans-
mission from the steering angle sensor is impossible for 1
sec. or more.
Translate ECU
Steering angle sensor
Steering angle sensor to translate ECU circuit
Skid control ECU
CAN1 communication system
DI93L±04
Page 1239 of 4323
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1037
1231 Author: Date:
2005 SEQUOIA (RM1146U)
6 Check harness and connector between translate ECU and skid control ECU
(CAN1 circuit).
NG Repair or replace parking brake switch circuit
(CAN1 circuit).
OK
7 Is DTC output?
Check DTC (ABS, VSC, translate ECU and CAN communication system) on page DI±911.
YES Repair circuit indicated by the output code
(See page DI±921).
NO
8 Check BRAKE warning light.
See combination meter troubleshooting on page DI±1614.
NG Repair or replace combination meter
(See page DI±1610).
OK
Check and replace translate ECU.
Page 2107 of 4323
DI3IR±10
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±1905
2099 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
If a trouble code is indicated during the DTC check, check the components listed for that code in the table
below (proceed to the page given for that code).
DTC No.
(See Page)Detection ItemTrouble Area
B1211
(DI±1908)Driver door ECU communication stop
Driver door ECU
Wire harness
Body ECU
B1212
(DI±1911)Front passenger door ECU communication stop
Passenger door ECU
Wire harness
Body ECU
B1214
B1215
(DI±1914)Communication bus malfunction (Short to B+)
Communication bus malfunction (Short to ground)
Driver door ECU
Passenger door ECU
Back door ECU
A/C ECU (Integration control panel)
Combination meter
Memory seat ECU & switch
Wire harness
Body ECU
B1221
(DI±1924)Power window switch circuit on driver door
Power window master switch (Built in driver door ECU)
Wire harness
Body ECU
B1222
(DI±1925)Door lock switch circuit on driver door
Door lock control switch front LH (Built in driver door ECU)
Door unlock detection switch front LH
Wire harness
Body ECU
B1223
(DI±1926)Power window switch circuit on passenger door
Power window switch (Built in passenger door ECU)
Wire harness
Body ECU
B1224
(DI±1927)Door lock switch circuit on passenger door
Door lock control switch front RH (Built in passenger door
ECU)
Door unlock detection switch front RH
Wire harness
Body ECU
B1231
(DI±1928)Jam protection limit switch circuit on driver door
Limit switch (Built in power window motor)
Driver door ECU
Wire harness
Body ECU
B1232
(DI±1929)Jam protection pulse switch circuit on driver door
Pulse switch (Built in power window motor)
Driver door ECU
Wire harness
Body ECU
B1233
(DI±1930)Jam protection limit switch circuit on passenger door
Limit switch (Built in power window motor)
Passenger door ECU
Wire harness
Body ECU
B1234
(DI±1931)Jam protection pulse switch circuit on passenger door
Pulse switch (Built in power window motor)
Passenger door ECU
Wire harness
Body ECU
B1241
(DI±1932)Body ECU switch circuit diagnosis
Back door power window switch
Rear wiper and washer switch
Wire harness
Body ECU
Page 2130 of 4323
DI±1928
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2122 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1231 Jam protection limit switch circuit on
driver door
CIRCUIT DESCRIPTION
This DTC is output while the body ECU senses the limit position through the limit switch, which is built into
the power window motor.
If the DTC is not output, the following may be malfunctioning:
DTC No.DTC Detection ConditionTrouble Area
B1231
No change in limit switch position for more than 2.0 seconds
even if moving the glass down when limit switch is OFF
(window glass is fully closed)Limit switch (Built in power window motor)
Driver door ECU
Wire harness
Body ECU
HINT:
For details of inspection, see page DI±1782.
If the problem reoccurs even after replacement, replace the body ECU.
DI1T1±06