Lexus ES300 (2002 year). Manual — part 290

052AY-03

F16281

USA:

CANADA:

C52361

DLC3

Tc

CG

05-288

-

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

441

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

PRE-CHECK

1.

DIAGNOSIS SYSTEM

(a)

Check the warning lights.
(1)

Release parking brake pedal.

(2)

When the ignition switch is turned ON, check that
the ABS warning light, BRAKE warning light, VSC
warning light, TRAC OFF indicator light and SLIP in-
dicator light goes on for approx. 3 seconds.

HINT:

When the parking brake is applied or the level of the brake
fluid is low, the BRAKE warning light is lit.

If the ECU stores DTC, ABS warning light, VSC warning
light and TRAC OFF indicator light is ON.

If the indicator check result is not normal, proceed to trou-
bleshooting for the light circuit.

Trouble Area

See page

ABS warning light circuit

05-369

BRAKE warning light circuit

05-370

VSC warning light circuit

05-372

TRAC OFF indicator light circuit

05-372

SLIP indicator light circuit

05-374

(b)

In case of not using hand-held tester:
Check the DTC.
(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 or VSC
warning light on the combination meter.

HINT:

If no code appears, inspect the diagnostic circuit, ABS
warning light circuit or VSC warning light circuit.

Trouble Area

See page

Tc terminal circuit

05-380

ABS warning light circuit

05-369

VSC warning light circuit

05-372

R01346

Normal Code

Code 11 and 21

ON

OFF

4 sec.

0.5 sec.

1.5 sec.

2.5 sec.

0.5 sec.

2 sec.

0.25 sec.

0.25 sec.

ON

OFF

Code 11

Code 21

BR3890

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

05-289

442

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

As an example, the blinking patterns for the normal code
and codes 11 and 21 are shown on the left.
(4)

Codes are explained in the code table on page

05-300

.

(5)

After completing the check, disconnect terminal Tc
and CG of DLC3, and turn off the display.

If 2 or more malfunctions are detected at the same time, DTC
will be displayed in ascending order.
(c)

In case of using the hand-held tester:
Check the DTC.
(1)

Hook up 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:
Please refer to the hand-held tester operator’s manual for fur-
ther details.

(d)

In case of not using hand-held tester:
Clear the DTC.
(1)

Using SST, connect the terminals Tc and CG of the
DLC3.

SST

09843-18040

(2)

Turn the ignition switch ON.

(3)

Clear DTC stored in ECU by depressing the brake
pedal 8 or more times within 5 sec.

(4)

Check that the ABS warning light and VSC warning
light shows the normal code.

(5)

Remove the SST from the DLC3.

SST

09843-18040

HINT:
Disconnect the battery cable during repairs will not erase the
DTC in the ECU.
(e)

In case of using hand-held tester:
Clear the DTC.
(1)

Turn the ignition switch ON.

(2)

Operate the hand-held tester to erase the codes.

HINT:
Please refer to the hand-held tester operator’s manual for fur-
ther details.

05-290

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

443

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

2.

DATA LIST

HINT:
According to the DATA LIST displayed by the hand-held tester, you can read the value of the switch, sensor,
actuator and so on without parts removal. Reading the DATA LIST as a first step of troubleshooting is one
of the method to shorten the labor time.
(a)

Connect the hand-held tester to the DLC3.

(b)

Turn the ignition switch ON.

(c)

According to the display on tester, read the ”DATA LIST”.

Item

Measurement Item /

Range (Display

Normal Condition

Diagnostic Note

ABS MOT RELAY

ABS motor relay / ON or
OFF

SOL RELAY

Solenoid relay / ON or
OFF

VSC / TRAC OFF SW

VSC / TRAC OFF switch /
ON or OFF

IDLE SW

Main idle switch / ON or
OFF

ON : Accelerator pedal re-
leased
OFF : Accelerator pedal
depressed

STOP LIGHT SW

Stop light 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

RESERVOIR SW

Reservoir level switch / ON
or OFF

ON : Fluid is below low lev-
el on reservoir tank
OFF : Fluid is above low
level on reservoir tank

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

Speed 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

Speed indicated on
speedometer

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

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2002 LEXUS ES300 REPAIR MANUAL (RM911U)

Item

Diagnostic Note

Normal Condition

Measurement Item /

Range (Display

WHEEL SPD RR

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

Actual wheel speed

Speed 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

Speed indicated on
speedometer

DECELERAT SENS

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

Approximately 0

±

0.13G

at still condition

Reading changes when ve-
hicle is bounced

DECELERAT SENS2

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

Approximately 0

±

0.13G

at still condition

Reading changes when ve-
hicle is bounced

IG VOLTAGE

ECU power supply voltage
/ NORMAL or TOO LOW

NORMAL : 9.5 V or over
TOO LOW : Below 9.5 V

SFRR

ABS solenoid (SFRR) / ON
or OFF

SFRH

ABS solenoid (SFRH) / ON
or OFF

SFLR

ABS solenoid (SFLR) / ON
or OFF

SFLH

ABS solenoid (SFLH) / ON
or OFF

SRRR (SRR)

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

SRRH (SRH)

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

SRLR

ABS solenoid (SRLR) / ON
or OFF

SRLH

ABS solenoid (SRLH) / ON
or OFF

SRCF (SA1)

TRAC solenoid (SRCF
(SA1)) / ON or OFF

SRCR (SA2)

TRAC solenoid (SRCR
(SA2)) / ON or OFF

SRMF (SMCF, SA3)

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

SRMR (SMCR, STR)

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

SMF (BA-SOL)

TRAC solenoid (SMF) /
ON or OFF

SMR

TRAC solenoid (SMR) /
ON or OFF

VEHICLE SPD

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

Actual vehicle speed

Speed indicated on
speedometer

MAS CYL PRESS 1

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

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

Reading increases when
brake pedal is depressed

MAS CYL PRESS 2

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

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

Reading increases when
brake pedal is depressed