
05-435
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
05BX4-02
ABS Warning Light BRAKE Warning PRE-CHECK
Light 1. DIAGNOSIS SYSTEM
USA: USA: (a) Check the warning lights.
(1) Release the parking brake pedal.
(2) When the ignition switch is turned ON, check that
Canada: Canada: the ABS warning light, VSC warning light, TRAC
OFF indicator light, BRAKE warning light and SLIP
indicator light come on for approx. 3 seconds.
HINT:
S When the parking brake is applied or the level of the brake
VSC Warning Light SLIP Indicator Light fluid is low, the BRAKE warning light comes on.
S If the indicator check result is not normal, proceed to trou-
bleshooting for the ABS warning light circuit, TRAC warn-
ing light circuit, TRAC OFF indicator light circuit, BRAKE
TRAC OFF Indica- warning light circuit or SLIP indicator light circuit.
tor Light Trouble Area See page
ABS warning light circuit 05-509
BRAKE warning light circuit 05-513
F45096 VSC warning light circuit 05-511
TRAC OFF indicator light circuit 05-516
SLIP indicator light circuit 05-520
Tc 2. DTC CHECK (USING SST CHECK WIRE)
(a) Checking DTCs using a SST check wire.
SST 09843-18040
(1) Using SST, connect terminals Tc and CG of DLC3.
(2) Turn the ignition switch ON.
(3) Read the DTC from the ABS warning light and VSC
warning light on the combination meter.
HINT:
CG C52361 S If no code appears, inspect the diagnostic circuit, ABS
warning light circuit or VSC warning light circuit.
Trouble Area See page
Tc terminal circuit 05-524
ABS warning light circuit 05-509
VSC warning light circuit 05-511
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 618
05-436
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
S As an example, the blinking patterns for normal code and
Normal Code codes 11 and 21 are shown on the left.
2 sec. (4) Codes are explained in the code table on page
0.25 sec.
05-447 .
0.25 sec.
(5) After completing the check, disconnect terminals Tc
and CG of DLC3, and turn off the display.
ON
If 2 or more are DTCs are detected at the same time, the DTCs
will be displayed in ascending order.
OFF
Code 11 and 21
0.5 sec. 0.5 sec.
1.5 sec.
4 sec. 2.5 sec.
ON
OFF
Code 11 Code 21
R01346
(b) Clearing the DTCs using the SST check wire.
SST 09843-18040
(1) Using SST, connect terminals Tc and CG of DLC3.
(2) Turn the ignition switch ON.
(3) Clear the DTCs 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.
BR3890 (5) Remove the SST from the terminals of DLC3.
HINT:
Clearing the DTCs cannot be performed by removing the bat-
tery cable or ECU-IG fuse.
3. DTC CHECK (USING HAND-HELD TESTER)
(a) Checking DTCs using the Hand-held tester.
(1) Connect the hand-held tester to the DLC3.
(2) Turn the ignition switch ON.
(3) Read the DTC by following the prompts on the tes-
ter screen.
HINT:
Refer to the hand-held tester operator's manual for further de-
tails.
(b) Clearing the DTCs using the hand-held tester.
(1) Connect the hand-held tester to the DLC3.
(2) Turn the ignition switch ON.
(3) Operate the hand-held tester to erase the codes.
HINT:
Refer to the hand-held tester operator's manual for further de-
tails.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 619
05-437
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
4. DATA LIST
With the hand-held tester connected to DLC3 and the ignition turned to ON, the ABS , TRAC and VSC data
list can be displayed. Follow the prompts on the tester screen to access the Data List.
Measurement Item /
Item Normal Condition Diagnostic Note
Range (Display)
ABS motor relay / ON or
ABS MOT RELAY ON : Motor relay ON -
OFF
Solenoid relay / ON or
SOL RELAY ON : Solenoid relay ON -
OFF
VSC / TRAC OFF switch / ON : TRAC OFF switch
VSC / TRAC OFF SW* -
ON or OFF ON
ON : Accelerator pedal re-
Main idle switch / ON or leased
IDLE SW -
OFF OFF : Accelerator pedal
depressed
OFF : Brake pedal de-
Stop light switch / ON or
STOP LIGHT SW pressed -
OFF
ON : Brake pedal released
ON : Parking brake applied
Parking brake switch / ON
PKB SW OFF : Parking brake re- -
or OFF
leased
BEFORE : No ABS opera-
ABS operation (FR) / BE- tion (FR)
ABS OPERT FR -
FORE or OPERATE OPERATE : During ABS
operation (FR)
BEFORE : No ABS opera-
ABS operation (FL) / BE- tion (FL)
ABS OPERT FL -
FORE or OPERATE OPERATE : During ABS
operation (FL)
BEFORE : No ABS opera-
ABS operation (RR) / BE- tion (RR)
ABS OPERT RR -
FORE or OPERATE OPERATE : During ABS
operation (RR)
BEFORE : No ABS opera-
ABS operation (RL) / BE- tion (RL)
ABS OPERT RL -
FORE or OPERATE OPERATE : During ABS
operation (RL)
Wheel speed sensor (FR)
reading / min.: 0 km/h (0 Speed indicated on
WHEEL SPD FR Actual wheel speed
MPH, max.: 326 km/h (202 speedometer
MPH)
Wheel speed sensor (FL)
reading / min.: 0 km/h (0 Speed indicated on
WHEEL SPD FL Actual wheel speed
MPH, max.: 326 km/h (202 speedometer
MPH)
Wheel speed sensor (RR)
reading / min.: 0 km/h (0 Speed indicated on
WHEEL SPD RR Actual wheel speed
MPH, max.: 326 km/h (202 speedometer
MPH)
Wheel speed sensor (RL)
reading / min.: 0 km/h (0 Speed indicated on
WHEEL SPD RL Actual wheel speed
MPH, max.: 326 km/h (202 speedometer
MPH)
Deceleration sensor 1
Approximately 0