Lexus RX300 (MCU15). Service manual — part 243

DI0W4–06

Inspector’s

Name

:

Customer’s Name

Date Vehicle
Brought In

Registration Date

Registration No.

Frame No.

Odometer Reading

/ /

/ /

Date Problem First Occurred

Frequency Problem Occurs

/ /

Continuous

Intermittent ( times a day)

Remains ON

Does not Light Up

DTC Check

1st Time

2nd Time

Normal Code

Malfunction Code (Code )

Normal Code

Malfunction Code (Code )

Symptoms

km

miles

Check Item

Normal

ABS does not operate.

ABS does not operate efficiently.

Does not Light Up

ABS & BA & TRC & VSC Check Sheet

BA does not operate.

VSC does not operate. (Wheels sideslip at the time of sharp turning.)

ABS Warning Light
Abnormal

Remains ON

Does not Light Up

Remains ON

Does not Light Up

Remains ON

Does not Light Up

SLIP Indicator
Light Abnormal

VSC Warning
Light Abnormal

Brake Warning
Light Abnormal

Malfunction
Indicator Light

TRC does not operate. (Wheels spin when starting rapidly.)

DI–204

–

DIAGNOSTICS

ABS & BA & TRC & VSC SYSTEM

LEXUS RX300 (RM785E)

CUSTOMER PROBLEM ANALYSIS CHECK

DI84M–01

F12361

w/ EBD:

F09750

Tc

CG

DLC3

–

DIAGNOSTICS

ABS & BA & TRC & VSC SYSTEM

DI–205

LEXUS RX300 (RM785E)

PRE–CHECK

1.

DIAGNOSIS SYSTEM

(a)

Check the warning lights.
(1)

Release the parking break pedal.

(2)

When the ignition switch is turned ON, check that
the ABS warning light, VSC warning light, brake
warning light

*1

and SLIP indicator light goes on for

approx. 3 seconds.
*1: w/ EBD only

HINT:

S

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

S

If the indicator check result is not normal, proceed to trou-
bleshooting for the ABS warning light circuit, VSC warn-
ing light circuit, brake warning light circuit or SLIP indica-
tor light circuit.

Trouble Area

See page

ABS warning light circuit

DI–287

VSC warning light circuit

DI–284

Brake warning light circuit

DI–290

SLIP indicator light circuit

DI–292

(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 and VSC
warning light on the combination meter.

HINT:

S

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

Trouble Area

See page

Tc terminal circuit

DI–298

ABS warning light circuit

DI–287

VSC warning light circuit

DI–284

R01346

Normal Code

0.25 sec.

0.25 sec.

2 sec.

ON

OFF

ON

OFF

0.5 sec.

0.5 sec.

Code 11 and 21

4 sec.

1.5 sec.

2.5 sec.

Code 11

Code 21

D09456

Hand–held Tester

DLC3

BR3890

DI–206

–

DIAGNOSTICS

ABS & BA & TRC & VSC SYSTEM

LEXUS RX300 (RM785E)

S

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

Codes are explained in the code table on page
DI–213.

(5)

After completing the check, disconnect terminals Tc
and CG, and turn off the display.

If 2 or more malfunction codes are identified at the same time,
the lowest numbered DTC will be displayed 1st.

(c)

In case of using 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 terminals Tc and CG of DLC3.

SST

09843–18040

(2)

Turn the ignition switch ON.

(3)

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

(4)

Check that the warning light shows the normal
code.

(5)

Remove the SST from the terminals of DLC3.

SST

09843–18040

HINT:
Cancellation cannot be done by removing the battery cable or
ECU–IG fuse.

D09456

Hand–held Tester

DLC3

F09750

DLC3

CG

Ts

Tc

BR3904

0.13 sec.

0.13 sec.

ON

OFF

–

DIAGNOSTICS

ABS & BA & TRC & VSC SYSTEM

DI–207

LEXUS RX300 (RM785E)

(e)

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

Hook up the hand–held tester to the DLC3.

(2)

Turn the ignition switch ON.

(3)

Operate the hand–held tester to erase the codes.
(See hand–held tester operator’s manual.)

2.

SENSOR SIGNAL CHECK (TEST MODE)

HINT:
If the ignition switch is turned from ON to ACC or LOCK during
test mode, DTC will be erased.
(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 DI–287,
DI–300).

(5)

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

(6)

Keeping the vehicle in the stationary condition and
the break pedal in free condition for 1 sec. or more,
continue to depress the break 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:
The above mentioned condition comes into existence, the ABS
warning light comes 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

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