Lexus ES300 (2002 year). Service manual — part 291

05-292

-

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

445

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

Item

Diagnostic Note

Normal Condition

Measurement Item /

Range (Display

AIR BLD SUPPORT

Air bleed support /
SUPPORT or NOT SUP

w / BA : Supported
w / VSC : Not supported

TEST MODE

Test mode / NORMAL or
TEST

NORMAL : Normal mode
TEST : During test mode

#CODES

Number of DTC recorded /
min.: 0, max.: 255

Min.: 0, max.: 39

3.

ACTIVE TEST

HINT:
Performing the ACTIVE TEST using the hand-held tester allows the relay, VSV, actuator and so on to oper-
ate without parts removal. Performing the ACTIVE TEST as a first step of troubleshooting is one of the meth-
od to shorten the labor time.
It is possible to display the DATA LIST during the ACTIVE TEST.
(a)

Connect the hand-held tester to the DLC3.

(b)

Turn the ignition switch ON.

(c)

According to the display on tester, perform the ”ACTIVE TEST”.

HINT:

IG must be turned ON to proceed Active Test using a hand-held tester.

*

1

: For VSC equipped vehicles only

Item

Vehicle Condition / Test Details

Diagnostic Note

SFRR

Turns ABS solenoid (SFRR) ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SFRH

Turns ABS solenoid (SFRH) ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SFLR

Turns ABS solenoid (SFLR) ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SFLH

Turns ABS solenoid (SFLH) ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SRRR

Turns ABS solenoid (SRRR) ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SRRH

Turns ABS solenoid (SRRH) ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SRLR

Turns ABS solenoid (SRLR) ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SRLH

Turns ABS solenoid (SRLH) ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SRCF (SA1)

Turns TRAC solenoid SRCF (SA1) ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SRCR (SA2)

Turns TRAC solenoid SRCF (SA2) ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SRMF (SMCF, SA3)

Turns TRAC solenoid SRMF (SMCF, SA3) ON / OFF

Operation of solenoid
(clicking sound) can be
heard

-

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

05-293

446

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

Item

Diagnostic Note

Vehicle Condition / Test Details

SRMR (SMCR, STR)

Turns TRAC solenoid SRMR (SMCR, STR) ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SMF (BA-SOL)

Turns TRAC solenoid SMF (BA-SOL) ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SMR

Turns TRAC solenoid SMR ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SFRR & SFRH

Turns ABS solenoid SFRR & SFRH ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SFLR & SFLH

Turns ABS solenoid SFLR & SFLH ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SRH & SRR

Turns ABS solenoid SRH & SRR ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SRLR & SRLH

Turns ABS solenoid SRLR & SRLH ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SFRH & SFLH

Turns ABS solenoid SFRH & SFLH ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SRCF & SRCR

Turns ABS solenoid SRCF & SRCR ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SRMF & SRMR

Turns ABS solenoid SRMF & SRMR ON / OFF

Operation of solenoid
(clicking sound) can be
heard

SOL RELAY

Turns ABS solenoid relay ON / OFF

Operation of solenoid
(clicking sound) can be
heard

ABS MOT RELAY

Turns ABS motor relay ON / OFF

Operation of motor can be
heard

ABS WARN LIGHT

Turns ABS warning light ON / OFF

Observe combination me-
ter

VSC WARN LIGHT

Turns VSC warning light ON / OFF

Observe combination me-
ter

VSC / TRC OFF IND

Turns VSC / TRAC OFF indicator ON / OFF

Observe combination me-
ter

SLIP INDI LIGHT

Turns SLIP indicator light ON / OFF

Observe combination me-
ter

BRAKE WRN LIGHT

Turns BRAKE warning light ON / OFF

Observe combination me-
ter

VSC / BR WARN BUZ

Turns VSC / BRAKE warning buzzer ON / OFF

Buzzer can be heard

05-294

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

447

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

4.

FREEZE FRAME DATA

(a)

The vehicle (sensor) status memorized during ABS and/or VSC operation or at the time of error code
detection can be displayed by the hand-held tester.

(b)

Only one record of freeze frame data is stored and the freeze frame data generated during ABS and/or
VSC operation are constantly updated. Also, the number of the ignition switch’s ”ON” after the freeze
frame data is stored can be memorized up to 31 and it can be displayed.

HINT:
If the ignition switch ”ON” operation exceeds 31 times, ”31” appears on the display.
(c)

If the diagnosis code abnormality occurs, the freeze frame data at the occurrence of the abnormality
is stored but the ABS actuation data is deleted.

Hand-held tester display

Measurement Item

Reference Value*

VEHICLE SPD

Wheel speed sensor reading

Speed indicated on speedometer

STOP LIGHT SW

Stop light switch signal

Stop light switch ON: ON, OFF: OFF

# IG ON

Number of operations of ignition switch ON after
memorizing freeze frame data

0 - 31

MAS CYL PRESS

Master cylinder pressure sensor reading

Brake pedal release : 0.3 - 0.9 V
Brake pedal depress: 0.8 - 4.5 V

MASS PRESS GRADE

Master cylinder pressure sensor change

-30 - 200 MPa/s

SYSTEM

System status

ABS activated: ABS
VSC/TRC activated: VSC/TRC
BA activated: BA
Fail safe mode activated: FAIL SF
No system activated: NO SYS

YAW RATE

Yaw rate angle sensor reading

-100 - 100

STEERING ANG

Steering sensor reading

Left turn: Increase
Right turn: Drop

THROTTLE

Throttle position sensor reading

Release accelerator pedal: Approx. 0 deg.

THROTTLE

Throttle position sensor reading

Release accelerator edal: A

rox. 0 deg.

Depress accelerator pedal: Approx. 90 deg.

G (RIGHT & LEFT)

Right and left G

-1.869 - 1.869

G (BACK & FORTH)

Back and forth G

-1.869 - 1.869

VSC (TRC) OFF SW

VSC OFF switch signal

TRAC OFF SW ON: ON
OFF: OFF

SHIFT POSITION

Shift lever position

FAIL
P,N
R
D
4
3
2
L

THROTTLE

Throttle sensor reading

0 - 125 deg.

*: If no conditions are specifically stated for ”Idling”, it means the shift lever is at N or P position, the A/C switch
is OFF and all accessory switches are OFF.

C52361

DLC3

CG

Ts

Tc

BR3904

0.13 sec.

0.13 sec.

ON

OFF

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

05-295

448

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

5.

SENSOR SIGNAL CHECK (TEST MODE)

HINT:

If the ignition switch is turned from ON to ACC or LOCK
during test mode, DTC of sensor check function will be
erased.

During test mode, ECU records all DTC of sensor check
function. By preforming sensor signal check, the codes
are erased if normality is confirmed. The codes left over
are the codes where abnormality was found.

(a)

In case of not using hand-held tester:
Check the ABS sensor signal.
(1)

Turn the ignition switch OFF.

(2)

Using SST, connect terminals Ts and CG of DLC3.

SST

09843-18040

(3)

Start the engine.

(4)

Check that the ABS warning light blinks.

HINT:
If the ABS warning light does not blink, inspect the ABS warning
light circuit and Ts terminal circuit (See page

05-368

,

05-369

and

05-380

).

(5)

Keep the vehicle in the stationary condition on a flat
place for 1 sec. or more.

(6)

Keeping the vehicle in the stationary condition and
the brake pedal in free condition for 1 sec. or more,
continue to depress the brake pedal with 147 N (15
kgf, 33 lbf) or more for 1 sec. or more.

(7)

Keeping the vehicle in the stationary condition, de-
press the brake pedal with 98 N (10 kgf, 22 lbf) or
more quickly.

HINT:
Under the above mentioned condition, the ABS warning light
turns ON for 3 seconds.

(8)

Drive vehicle straight forward.
When driving the vehicle at the speed faster than 45
km/h (28 mph) for several seconds, check that the
ABS warning light comes off.

HINT:
There is a case that the sensor check is not completed if the ve-
hicle has its wheels spun or its steering wheel steered during
this check.

(9)

Stop the vehicle.

(10) Using SST, connect terminals Tc and CG of DLC3.
SST

09843-18040