2002 Toyota Sequoia Service & Repair Manual
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2004 BRAKES
ABS With EBD & BA & TRAC & VSC System - Diagnostics - Sequoia
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshoot in accordance with the procedure on the following pages.
2004 Toyota Sequoia Limited
2004 BRAKES ABS With EBD & BA & TRAC & VSC System - Diagnostics - Sequoia
2004 Toyota Sequoia Limited
2004 BRAKES ABS With EBD & BA & TRAC & VSC System - Diagnostics - Sequoia
Fig. 1: Troubleshooting Flow Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
CUSTOMER PROBLEM ANALYSIS CHECK
2004 Toyota Sequoia Limited
2004 BRAKES ABS With EBD & BA & TRAC & VSC System - Diagnostics - Sequoia
Fig. 2: ABS & BA & TRAC & VSC Check Sheet
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
PRE-CHECK
2004 Toyota Sequoia Limited
2004 BRAKES ABS With EBD & BA & TRAC & VSC System - Diagnostics - Sequoia
1. DIAGNOSIS SYSTEM
a. Check the warning lights.
1. Release the parking brake pedal.
2. When the ignition switch is turned ON, check that the ABS warning light, VSC TRAC
warning light, VSC OFF (TRAC OFF) indicator light, BRAKE warning light and SLIP
indicator light go on for approx. 3 seconds.
Fig. 3: Checking Warning Lights
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NOTE:
When the parking brake is applied or the level of the brake fluid
is low, the BRAKE warning light comes on.
If the indicator check result is not normal, proceed to
troubleshooting for the ABS warning light circuit, VSC TRAC
warning light circuit, VSC OFF (TRAC OFF) indicator light
circuit, BRAKE warning light circuit or SLIP indicator light
circuit.
TROUBLE AREA REFERENCE
2004 Toyota Sequoia Limited
2004 BRAKES ABS With EBD & BA & TRAC & VSC System - Diagnostics - Sequoia
b. In case of not using TOYOTA hand-held tester:
Check the DTC of skid control ECU.
1. Using SST, connect terminals TC and CG of DLC3.
SST 09843-18040
2. Turn the ignition switch ON.
3. Read the DTC from the ABS warning light and VSC TRAC warning light on the
combination meter.
Trouble Area
ABS WARNING LIGHT CIRCUIT
VSC TRAC WARNING LIGHT CIRCUIT
VSC OFF (TRAC OFF) INDICATOR LIGHT CIRCUIT
BRAKE WARNING LIGHT CIRCUIT
SLIP INDICATOR LIGHT CIRCUIT
NOTE:
If no code appears, inspect the diagnostic circuit, ABS warning lig
circuit or VSC TRAC waning light circuit.
TROUBLE AREA REFERENCE
Trouble Area
TC TERMINAL CIRCUIT
ABS WARNING LIGHT CIRCUIT
VSC TRAC WARNING LIGHT CIRCUIT
2004 Toyota Sequoia Limited
2004 BRAKES ABS With EBD & BA & TRAC & VSC System - Diagnostics - Sequoia
4. Codes are explained in the code table on DIAGNOSTIC TROUBLE CODE CHART .
5. After completing the check, disconnect terminals Tc and CG of DLC3, and turn off the
display.
If 2 or more malfunction codes are identified at the same time, the DTC will be displayed in
ascending order.
Fig. 4: Identifying DLC3 Connector Terminals Of Skid Control ECU
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
As an example, the blinking patterns for normal code and codes 1
21 are shown on the left.
2004 Toyota Sequoia Limited
2004 BRAKES ABS With EBD & BA & TRAC & VSC System - Diagnostics - Sequoia
Fig. 5: Blinking Pattern For Normal Code And Code 11 & 21
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. In case of not using TOYOTA hand-held tester:
2004 Toyota Sequoia Limited
2004 BRAKES ABS With EBD & BA & TRAC & VSC System - Diagnostics - Sequoia
Check the DTC of translate ECU.
1. Release the parking brake pedal.
2. Check the brake fluid level.
3. Using SST, connect terminals Tc and CG of DLC3.
SST 09843-18040
4. Read the DTC on the BRAKE warning light.
Fig. 6: Identifying DLC3 TC & CG Connector Terminal Of Translate ECU
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NOTE: Once the ignition switch is turned off, all DTC in the translate ECU
are cleared.
2004 Toyota Sequoia Limited
2004 BRAKES ABS With EBD & BA & TRAC & VSC System - Diagnostics - Sequoia
d. In case of using TOYOTA hand-held tester:
Check the DTC.
1. Hook up the TOYOTA hand- held tester to the DLC3.
2. Turn the ignition switch ON.
3. Read the DTC by following the prompts on the tester screen.
NOTE:
If no code appears, inspect the diagnostic circuit, and BRAKE warning
light circuit.
TROUBLE AREA REFERENCE
When the parking brake is applied or the level of the brake fluid is low,
BRAKE warning light comes on.
If all sensors are normal, a normal code is output. (A cycle of 0.25 sec.
and 0.25 sec. OFF is repeated.)
If 2 or more malfunction codes are identified at the same time, the code
will be displayed in ascending order.
Fig. 7: Measuring Time B/W Two Cycles
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Trouble Area
TC TERMINAL CIRCUIT
BRAKE WARNING LIGHT CIRCUIT
NOTE: Please refer to the TOYOTA hand-held tester operator's manual for
further details.
2004 Toyota Sequoia Limited
2004 BRAKES ABS With EBD & BA & TRAC & VSC System - Diagnostics - Sequoia
Fig. 8: Connecting Hand - Held Tester To DLC3
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
e. In case of not using TOYOTA hand-held tester:
Clear the DTC.
1. Using SST, connect terminals Tc and CG of DLC3.
SST 09843-18040
2. Turn the ignition switch ON.
3. Clear the DTC stored in ECU by depressing the brake pedal 8 times or more within 5
seconds.
4. Check that the warning light indicates the normal code.
5. Remove the SST from the terminals of DLC3.
SST 09843-18040
NOTE: Cancellation cannot be done by removing the battery cable or ECU-IG
2004 Toyota Sequoia Limited
2004 BRAKES ABS With EBD & BA & TRAC & VSC System - Diagnostics - Sequoia
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