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
).
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)
–
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
–
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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