Toyota Sequoia (2005). Manual - part 280

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–915

1109

# CODES

Number of trouble codes

min.: 0
max.: 255

PEDAL STROKE

Pedal stroke sensor reading

min.: 0 V
max.: 5.1 V

STROKE GRADE

Pedal stroke sensor change

min.: –2560
max.: 2550

SPD GRADE

Speed sensor grade

min.: –1.869
max.: 1.869

DIDM4–01

DI–916

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1110

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

).

Malfunction

Symptom

ABS system

ABS, BA, TRAC, and VSC control prohibited

BA system

ABS, BA, TRAC, and VSC control prohibited

EBD system

ABS & EBD control prohibited

TRAC system

TRAC and VSC control prohibited

VSC system

TRAC 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.

DIDM5–01

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–917

1111

DATA LIST / ACTIVE TEST

1.

DATA LIST

HINT:
With the hand–held tester connected to the DLC3 and the ignition switch in the ON position, the ABS, TRAC
and VSC data list can be displayed. Follow the prompts on the tester screen to access the DATA LIST.

Item

Measurement Item /

Range (Display)

Normal Condition

Diagnostic Note

ABS MOT RELAY

ABS motor relay / ON or
OFF

ON : Motor relay ON
OFF : Motor relay OFF

–

SOL RELAY

Solenoid relay / ON or
OFF

ON : Solenoid relay ON
OFF : Solenoid relay OFF

–

VSC / TRC OFF SW

TRAC control switch / ON
or OFF

ON : TRAC control switch
ON
OFF : TRAC control switch
OFF

–

AIR BLD SUPPORT

Air bleed support / ON or
OFF

ON : Support ON
OFF : Support OFF

–

STOP LIGHT SW

Stop lamp switch / ON or
OFF

ON : Brake pedal de-
pressed
OFF : Brake pedal re-
leased

–

PKB SW

Parking brake switch / ON
or OFF

ON : Parking brake applied
OFF : Parking brake re-
leased

–

ABS OPERT FR

ABS operation (FR) / BE-
FORE or OPERATE

BEFORE : No ABS opera-
tion (FR)
OPERATE : During ABS
operation (FR)

–

ABS OPERT FL

ABS operation (FL) / BE-
FORE or OPERATE

BEFORE : No ABS opera-
tion (FL)
OPERATE : During ABS
operation (FL)

–

ABS OPERT RR

ABS operation (RR) / BE-
FORE or OPERATE

BEFORE : No ABS opera-
tion (RR)
OPERATE : During ABS
operation (RR)

–

ABS OPERT RL

ABS operation (RL) / BE-
FORE or OPERATE

BEFORE : No ABS opera-
tion (RL)
OPERATE : During ABS
operation (RL)

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WHEEL SPD FR

Wheel speed sensor (FR)
reading / min.: 0 km/h (0
MPH), max.: 326 km/h
(202 MPH)

Actual wheel speed

Similar speed as indicated
on speedometer

WHEEL SPD FL

Wheel speed sensor (FL)
reading / min.: 0 km/h (0
MPH), max.: 326 km/h
(202 MPH)

Actual wheel speed

Similar speed as indicated
on speedometer

WHEEL SPD RR

Wheel speed sensor (RR)
reading / min.: 0 km/h (0
MPH), max.: 326 km/h
(202 MPH)

Actual wheel speed

Similar speed as indicated
on speedometer

WHEEL SPD RL

Wheel speed sensor (RL)
reading / min.: 0 km/h (0
MPH), max.: 326 km/h
(202 MPH)

Actual wheel speed

Similar speed as indicated
on speedometer

DI–918

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1112

DECELERAT SEN

Deceleration sensor 1
reading / min.: –1.869 G,
max.: 1.869 G

Approximately 0 

±

 0.13 G

at still condition

Reading changes when ve-
hicle is bounced

DECELERAT SEN2

Deceleration sensor 2
reading / min.: –1.869 G,
max.: 1.869 G

Approximately 0 

±

 0.13 G

at still condition

Reading changes when ve-
hicle is bounced

IG VOLTAGE

ECU power supply voltage
/ TOO LOW / NORMAL /
TOO HIGH

TOO LOW : 9.5 V or less
NORMAL : 9.5 to 14.0 V
TOO HIGH : 14.0 V or
more

–

SFRR

ABS solenoid (SFRR) / ON
or OFF

ON : Operated
OFF : Not operated

–

SFRH

ABS solenoid (SFRH) / ON
or OFF

ON : Operated
OFF : Not operated

–

SFLR

ABS solenoid (SFLR) / ON
or OFF

ON : Operated
OFF : Not operated

–

SFLH

ABS solenoid (SFLH) / ON
or OFF

ON : Operated
OFF : Not operated

–

SRRR (SRR)

ABS solenoid (SRRR
(SRR)) / ON or OFF

ON : Operated
OFF : Not operated

–

SRRH (SRH)

ABS solenoid (SRRH
(SRH)) / ON or OFF

ON : Operated
OFF : Not operated

–

SRLR

ABS solenoid (SRLR) / ON
or OFF

ON : Operated
OFF : Not operated

–

SRLH

ABS solenoid (SRLH) / ON
or OFF

ON : Operated
OFF : Not operated

–

SRMR (SMCR, STR)

SRMR (SMCR, STR) / ON
or OFF

ON : Operated
OFF : Not operated

–

SRMF (SMCF SA3)

SRMF (SMCF, SA3) / ON
or OFF

ON : Operated
OFF : Not operated

–

SRCR (SA2)

SRCR (SA2) / ON or OFF

ON : Operated
OFF : Not operated

–

SRCF (SA1)

SRCF (SA1) / ON or OFF

ON : Operated
OFF : Not operated

–

YAW RATE

Yaw rate sensor/
Min.: –128 deg/s, Max.:
127 deg/s

Min.: –128 deg/s 
Max.: 128 deg/s

–

YAW ZERO VALUE

Memorized zero value/
Min.: –128 deg/s, Max.:
127 deg/s

Min.: –128 deg/s 
Max.: 128 deg/s

–

STEERING ANG

Steering sensor/
Min.: –1152 deg, 
Max.: 1150.875 deg

Left turn: Increase
Right turn: Decrease

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MAS CYL PRS 1

Master cylinder pressure
sensor 1 reading / min.: 0
V, max.: 5 V

When brake pedal is re-
leased : 0.3 to 0.9 V

Reading increases when
brake pedal is depressed

MAS CYL PRS 2

Master cylinder pressure
sensor 2 reading / min.: 0
V, max.: 5 V

When brake pedal is re-
leased: 0.3 to 0.9 V

Reading increases when
brake pedal is depressed

PEDAL STROKE

Pedal Stroke Sensor min.:
0, max.: 5.1

Approximately 2.0 V with-
out the brake pedal de-
pressed

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