Lexus ES300 (2002 year). Manual — part 292

BR3893

Malfunction Code (Example Code 72, 76)

7

2

6

7

ON

OFF

0.5 sec.

0.5 sec.

0.5 sec.

0.5 sec.

1.5 sec.

2.5 sec.

4 sec.

Repeat

C52361

Tc

DLC3

CG

Ts

BR3904

0.13 sec.

0.13 sec.

ON

OFF

05-296

-

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

449

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

(11) Read the number of blinks of the ABS warning light.

HINT:

See the list of DTC (See page

05-300

).

If every sensor is normal, there is a normal code output
(A cycle of 0.25 sec. ON and 0.25 sec. OFF is repeated).

If 2 or more malfunctions are indicated at the same time,
the lowest numbered code will be displayed 1st.

(12) After performing the check, disconnect terminals Ts

and CG, Tc and CG of DLC3, and turn the ignition
switch OFF.

SST

09843-18040

(b)

In case of using hand-held tester:
Check the ABS sensor signal.
(1)

Perform step (3) to (9) of the step (a).

(2)

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.

(c)

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

Turn the ignition switch OFF.

(2)

Check that the shift lever position is at P range, turn
the steering wheel to the neutral position.

(3)

Using SST, connect terminals Ts and CG of DLC3.

SST

09843-18040

(4)

Start the engine.

(5)

Check that the VSC warning light blinks.

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

05-372

, and

05-382

).

(6)

When a new ECU is installed:
Start the engine and keep the vehicle in the station-
ary condition on the flat place for 3 sec. or more.

(7)

Check the steering angle sensor.

F02135

Start Position

End Position

Within

±

5

°

Malfunction Code (Example Code 71, 72)

ON

OFF

0.5 sec.

0.5 sec.

1.5 sec.

2.5 sec.

4 sec.

Repeat

71

72

-

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

05-297

450

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

From the vehicle stationary condition,turn the steer-
ing wheel to either left or right to the full lock posi-
tion, and turn back the steering wheel to the neutral
position.

(8)

Check the yaw rate sensor.
Shift the shift lever to the D range and drive the ve-
hicle at the vehicle speed of approx. 5 km/h (3 mph),
turn the steering wheel either to left or right 90

°

or

more, and maintain 180

°

circular drive.

Stop the vehicle and shift the shift lever to the P
position, check that the skid control buzzer sounds
for 3 sec.

HINT:

If the skid control buzzer sounds, the sensor check is
completed normally.

If the skid control buzzer does not sound, check the skid
control buzzer circuit (See page

05-378

), then perform

the sensor check again.

If the skid control buzzer still won’t sound, there is a mal-
function in the VSC sensor, so check the DTC.

Drive the vehicle in a 180

° circle

. At the end of the turn,

the direction of the vehicle should be within 180

°±

5

°

of

its start position.

Do not spin the wheels.
(9)

Using SST, connect terminals Tc and CG of DLC3.

SST

09843-18040

(10) Read the number of blinks of the VSC warning light.

HINT:

See the list of DTC (See page

05-300

).

If every sensor is normal, there is a normal code output.
(A cycle of 0.25 sec. ON and 0.25 sec. OFF is repeated.)

If 2 or more malfunctions are indicated at the same time,
the lowest numbered code will be displayed 1st.

(11) After performing the check, disconnect the SST

from terminals Ts and CG, Tc and CG of DLC3 and
turn the ignition switch OFF.

SST

09843-18040

C52361

DLC3

CG

Ts

05-298

-

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

451

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

(d)

In case of using hand-held tester:
Check the VSC sensor signal.
(1)

Perform step (4) to (8) of the step (c).

(2)

Read the DTC by following the tester screen.

HINT:
Please refer to the hand-held tester operator’s manual for fur-
ther details.
6.

YAW RATE SENSOR ZERO POINT CALIBRATION

HINT:

When having replaced the yaw rate sensor, deceleration
sensor or the ECU, make sure to perform yaw rate and de-
celeration sensors’ zero point calibration. Be sure to com-
plete this step 6. once it is started.

During step 6., an unreplaced sensor also requires zero
point calibration.

NOTICE:

While obtaining the zero point, keep the vehicle in sta-
tionary condition and do not tilt, move or shake the
vehicle

Be sure to perform this on a level surface (within an
inclination of 1 %).

(a)

Clear the zero points of the yaw rate and deceleration
sensors.
(1)

Shift the shift lever to P range.

(2)

Turn the ignition switch ON in a stationary condition.

(3)

With the lit switch ON, using SST, repeat a cycle of
short and open between terminals Ts and CG of
DLC3 4 times or more within 8 sec. Check that the
TRC OFF indicator light is lit indicating the recorded
zero point is erased.

SST

09843-18040

(4)

Turn the ignition switch OFF.

(b)

Obtain zero point of the yaw rate sensor.
(1)

Make the terminals Ts and CG of DLC3 discon-
nected.

(2)

Turn the ignition switch ON.

HINT:
The vehicle should be in a stationary condition with the shift le-
ver in P range.

(3)

Check that the lit TRC OFF indicator light turns off
about 15 sec. after the ignition switch is turned ON.

HINT:
Even if the ignition is not turned OFF in step (a)-(4) and remains
ON, the yaw rate sensor zero point calibration can be com-
pleted. In this case, the TRC OFF indicator light is lit for about
15 sec. and then starts blinking. (Normal code)

C52361

DLC3

CG

Ts

BR3904

0.13 sec.

0.13 sec.

ON

OFF

-

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

05-299

452

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

(4)

After ensuring that the TRC OFF indicator light re-
mains OFF for 2 sec., turn the ignition switch OFF.

HINT:
If the ignition switch is not turned OFF in step (a)-(4), make sure
that the TRC OFF indicator light blinks for 2 sec. Then turn the
ignition switch OFF.
(c)

Perform deceleration sensor zero point calibration.

NOTICE:
After step (b) (the yaw rate sensor zero point calibration),
the VSC warning light goes off. At this time, if the vehicle
is driven without performing step (c) (deceleration sensor
zero point calibration), deceleration sensor zero point cal-
ibration malfunction will be detected and the VSC warning
light will light up. Therefore, perform step (c) right after step
(b).

(1)

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

SST

09843-18040

(2)

Turn the ignition switch ON.

HINT:
Place the vehicle in a stationary condition with the shift lever in
P range.

(3)

After turning the ignition switch ON, check that the
VSC warning light is lit for about 4 sec. and then
starts quick blinking at 0.13 sec. intervals.

(4)

After confirming the blinking of the TRC OFF indica-
tor light for 2 sec., turn the ignition switch OFF.

(5)

Remove the SST and make the terminals Ts and
CG of DLC3 disconnected.

SST

09843-18040

7.

DECELERATION SENSOR OPERATION DIAGNOSIS
SYSTEM

CAUTION:
While checking the deceleration sensor operating diagno-
sis system, ABS does not operate and brake system oper-
ates as a conventional brake system.