2001 TOYOTA SEQUOIA Page 18

DI±1032
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1226 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check for open and short circuit in harness and connector between skid control
ECU and VSC TRAC warning light (See page IN±35).
NG Repair or replace harness or connector.
OK
3 Check VSC TRAC warning light.
See combination meter troubleshooting on page DI±1614.
NG Repair combination meter assembly
(See page DI±1610).
OK
Replace skid control ECU
(See page BR±52).
NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page DI±897).

F18069
DI±1036
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1230 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check harness and connector between translate ECU and parking brake switch
(See page BE±2).
NG Repair or replace parking brake switch circuit.
OK
4 Check brake fluid level warning switch.
PREPARATION:
Disconnect the brake fluid level warning switch connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSwitch ConditionSpecified Condition
(B2±1) ± (B2±2)Float UP10 kW or more
(No continuity)
(B2±1) ± (B2±2)Float DOWN1 W or less (Continuity)
NG Replace brake fluid level warning switch.
OK
5 Check for open and short circuit in harness and connector between brake fluid
level warning switch and translate ECU (See page IN±35).
NG Repair or replace harness or connector.
OK

± 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.

DI±1038
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1232 Author: Date:
2005 SEQUOIA (RM1146U)
BRAKE Warning Light Circuit (Does not light up)
CIRCUIT DESCRIPTION
See page DI±1033.
WIRING DIAGRAM
See page DI±1033.
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 when using the hand±held tester and start from step 2 when not using the
hand±held tester.
1 Check operation of the BRAKE warning light.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position and hand±held tester main switch ON.
(c) Select the ACTIVE TEST mode on the hand±held.
CHECK:
Check that ºONº and ºOFFº of the BRAKE warning light can be shown on the combination meter with the
hand±held tester.
ItemVehicle Condition/Test DetailsDiagnostic Note
BRAKE WARN LIGHTTurn BRAKE warning light ON/OFFObserve combination meter
OK:
BRAKE warning light operates.
NG Go to step 3.
OK
DIDMO±01

± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1039
1233 Author: Date:
2005 SEQUOIA (RM1146U)
2 Replace the translate ECU and check whether or not the trouble occurs again.
PREPARATION:
(a) Clear the DTC (See page DI±911).
(b) Turn the ignition switch OFF.
CHECK:
Turn the ignition switch to the ON position, and check if the same DTC still remains in the memory.
RESULT:
DTC is outputA
DTC is not outputB
B END.
A
Check and replace skid control ECU
(See page BR±52).
NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page DI±897).
3 Check harness and connector between translate ECU and skid control ECU
(CAN1 circuit).
NG Repair or replace parking brake switch circuit
(CAN1 circuit).
OK
4 Check harness and connector between translate ECU and combination meter
(See page IN±35).
NG Repair or replace harness or connector.
OK

DI±1040
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1234 Author: Date:
2005 SEQUOIA (RM1146U)
5 Check BRAKE warning light.
See combination meter troubleshooting on page DI±1614.
NG Repair combination meter assembly
(See page DI±1610).
OK
Check and 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±1044
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1238 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check SLIP indicator light.
See combination meter troubleshooting on page DI±1614.
NG Repair or replace combination meter
(See page DI±1610).
OK
5 Is DTC output?
Check DTC (Translate ECU and CAN communication system) on page DI±911.
NG Repair circuit indicated by output code
(See page DI±921).
OK
6 Check for open and short circuit in harness and connector between translate
ECU and SLIP indicator light (See page IN±35).
NG Repair or replace harness or connector.
OK
Check and replace translate ECU.

± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1045
1239 Author: Date:
2005 SEQUOIA (RM1146U)
SLIP Indicator Light Circuit (Does not light up)
CIRCUIT DESCRIPTION
See page DI±1041.
WIRING DIAGRAM
See page DI±1041.
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 when using the hand±held tester and start from step 3 when not using the
hand±held tester.
1 Check operation of the SLIP indicator light.
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 ACTIVE TEST mode on the hand±held tester.
CHECK:
Check that ºONº and ºOFFº of the SLIP indicator light can be shown on the combination meter with the hand±
held tester.
ItemVehicle Condition / Test DetailsDiagnostic Note
SLIP INDI LIGHTTurns SLIP indicator light ON / OFFObserve combination me-
ter
OK:
SLIP indicator operates.
NG Go to step 3.
OK
DIDMP±01