Lexus ES300 (2002 year). Manual — part 348

C52361

TEM

CG

DLC3:

-

DIAGNOSTICS

ELECTRONIC MODULATED SUSPENSION SYSTEM

05-235

388

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

INSPECTION PROCEDURE

1

INSPECT DLC3 TERMINAL VOLTAGE(TEM TERMINAL)

(a)

Turn the ignition switch to ON.

(b)

Measure voltage between terminals TEM and CG of
DLC3.
OK:
Voltage: 10 - 14 V

OK

Go to step 3

NG

2

CHECK HARNESS AND CONNECTOR(DLC3 - BODY GROUND)

(a)

Check for open and short circuit in harness and connector between terminal CG of DLC3 and body
ground (See page

01-31

).

OK

REPAIR OR REPLACE HARNESS OR
CONNECTOR

OK

3

CHECK HARNESS AND CONNECTOR(DLC3 - ABSORBER CONTROL ECU)

(a)

Check for open and short circuit in harness and connector between terminal TEM of DLC3 and absorb-
er control ECU (See page

01-31

).

NG

REPAIR OR REPLACE HARNESS OR
CONNECTOR

OK

CHECK AND REPLACE ABSORBER CONTROL ECU(See page

01-31

)

056A5-01

:

Sometimes ( times per day, month)

Constant
Once only

Fine

Snowy

Cloudy

Rainy

Hot

Various/ Others

Cold (Approx.

°

F(

°

C))

Cool

Warm

Others ( )

Suburbs

Rough Road

Inner City

Hill (Up, Down)

Highway

Inspector’s
Name

Customer’s Name

Date Vehicle
Brought in

Date Problem First Occurred

Frequency Problem Occurs

1st Time

2nd Time

DTC Check

Conditions at
Time of Problem
Occurrence

Symptoms

Registration No.

Registration Year

Frame No.

Odometer Reading

Weather

Outdoor Temperature

Place

Malfunction in
damping force
control

Anti-roll control does not operate

Others

Anti-squat control does not operate

Anti-dive control does not operate

High speed control does not operate
Bounding control does not operate

Others ( )

Normal code

Normal code

Malfunction code (code )

Malfunction code (code )

ELECTRONIC MODULATED SUSPENSION SYSTEM Check Sheet

05-192

-

DIAGNOSTICS

ELECTRONIC MODULATED SUSPENSION SYSTEM

345

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

CUSTOMER PROBLEM ANALYSIS CHECK

056A6-01

D26296

CG

TEM

LED

Resistor

DLC3:

C52361

DLC3:

CG

Tc

D26296

CG

TEM

LED

Resistor

DLC3:

-

DIAGNOSTICS

ELECTRONIC MODULATED SUSPENSION SYSTEM

05-193

346

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

PRE-CHECK

1.

DIAGNOSIS SYSTEM

(a)

Check the TEM output (LED lightening check).
(1)

Connect the LED and resistor in series between ter-
minals TEM and CG of the DLC3.

NOTICE:
If connected reversely, the LED does not light.
HINT:

Use the LED whose recommended operating current is
10 - 20 mA.

The 500

Ω

to 1 k

Ω

resistor must be used.

(2)

Turn the ignition switch to ON, and check that the
LED lights for about 2 seconds.

HINT:
If the LED does not light, inspect the TEM circuit (See page

05-234

).

(b)

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

Check the battery positive voltage.

Battery positive voltage:
10 - 14 V (Engine stopped)
(2)

After driving the vehicle, using SST, connect termi-
nals Tc and CG of the DLC3.

SST

09843-18040

HINT:

Do not stop the engine.

Under this condition, the ignition switch is ON.

NOTICE:
Wrong connection of the connector may cause a malfunc-
tion. With extreme caution, connect the connector.

(3)

Connect the LED and resistor in series between ter-
minals TEM and CG of the DLC3.

F41629

0.25 sec.

Light OFF

Light ON

0.25 sec.

Normal Code:

F41630

2.5 sec.

Repeat

1

Light ON

Malfunction Code (Example Code 21 and 23):

Light OFF

4.5 sec.

0.5 sec.

0.5 sec.

3

2

2

1.5 sec.

4.5 sec.

BR3890

05-194

-

DIAGNOSTICS

ELECTRONIC MODULATED SUSPENSION SYSTEM

347

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

(4)

Check the number that the LED blinks.

HINT:

When the code is normal, the LED keeps on for 0.25 se-
conds and off for 0.25 seconds repeatedly.

When more than 2 diagnosis codes are detected, the
diagnosis codes are displayed in order from the smallest
number.

If no code appears, inspect the Tc circuit (See page

05-230

).

Codes are explained in the code table on page

05-200

.

(5)

Turn the ignition switch to ON.

(6)

Disconnect the SST from terminals Tc and CG of the
DLC3.

SST

09843-18040

(7)

Disconnect the LED and resistor from the terminals
TEM and CG of the DLC3.

HINT:
Confirm that the connected LED is off.

(8)

When an abnormal code is output, inspect the func-
tion, absorber control ECU and input signal.

(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 to 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, it connects the terminal Tc and CG of the
DLC3.

SST

09843-18040

(2)

Turn the ignition switch to ON.

(3)

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

(4)

Check that DTC output the normal code.
(See step 1 - (b)).