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Lexus ES300 (1997 year). Manual - part 437

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DIAGNOSTICS

CRUISE CONTROL SYSTEM

DI–525

677

1997 LEXUS ES300 (RM511U)

Actuator Control Cable

INSPECTION PROCEDURE

Actuator control cable inspection

OK:
(a)

Check that the actuator, control cable throttle link are properly installed and that the cable and link are
connected correctly.

(b)

Check that the actuator and bell crank are operating smoothly.

(c)

Check that the cable is not loose or too tight.

OK:

Freeplay: less than 10 mm

HINT:

If the control cable is very loose, the vehicle’s loss of speed going uphill will be large.

If the control cable is too tight, the idle RPM will become high.

DI0FH–01

DI0D2–01

Customer Problem Analysis

Check and Clear DTC (Pre–check)

Vehicle Brought to Workshop

Problem Symptom Confirmation

Symptom Simulation

Symptom does not
occur

DTC Check

Normal code

DTC Chart

Problem Symptoms Table

Circuit Inspection

Actuator Check

Parts Inspection

Identification of Problem

Repair

Confirmation Test

End

Items inside

are titles of pages in this

manual with the page number indicated in the
bottom portion. See the indicated pages
for detailed explanations.

Step 2, 5, 8, 10: Diagnostic steps permitting the use of

the LEXUS hand–held tester or LEX-
US break–out–box.

∼

Malfuction code

DI–526

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

678

1997 LEXUS ES300 (RM511U)

AIR CONDITIONING SYSTEM

HOW TO PROCEED WITH TROUBLESHOOTING

Perform troubleshooting in accordance with the procedure on the following page.

DI0D3–01

Inspector’s name:

Customer’s Name

Registration No.

Registration Year

Frame No.

Odometer Reading

km
Miles

Date vehicle
Brought In

/ /

Date of Problem Occurrence

How Often does Problem Occur?

Weather

Outdoor Temperature

/ /

Continuous

Intermittent ( times a day)

Fine

Cloudy

Snowy

Various / Other

Hot

Warm

Cool

Cold (Approx.

)

Symptoms

Blower motor doe not operation

Blower motor speed does not change

(Always Hi, Always Med, Always Lo)

Air Flow Control is
Faulty

Cabin temperature does not go down

Cabin temperature does not rese

Response is slow

Cannot change between FRS and REC

(Always Fresh or always Recirculating)

Mode will not change

Will not enter the desired mode

Temperature
Control is Faulty

Air Inlet Control is
Faulty

Vent Control is
Faulty

DTC Check

1st Time

2nd Time

Normal Code

Malfunction Code (Code )

Normal Code

Malfunction Code (Code )

AIR CONDITIONING SYSTEM Check Sheet

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–527

679

1997 LEXUS ES300 (RM511U)

CUSTOMER PROBLEM ANALYSIS CHECK

DI0D4–01

AT0716

OFF

0.5 Seconds

Turn ignition switch ON with AUTO
and R/F switches held down.

Indicator Check

DEF

R/F

(Sensor Check)

(continuous operation)

DTC

Check

(Sensor Check)

(stepped operation)

DTC

Check

Actuator Check

(continuous operation)

Actuator Check

(stepped operation)

If both AUTO switch and R/F switches are
not pressed at the same time.

Cancel check mode and can start air condi-
tioning control.

: Indicates a switch operation

OFF

DEF

R/F

AUTO

R/F

OFF

AUTO

DEF

DI–528

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

680

1997 LEXUS ES300 (RM511U)

PRE–CHECK

WARNING FOR A/C COMPRESSOR LOCK

If compressor lock occurs during air conditioning operation, the
A/C switch indicator on the air conditioning control assembly
starts blinking to warn the driver.
When this occurs, check for compressor lock (DTC 22) using
DTC check then proceed to inspect the circuit or the component
(See page

DI–552

LIST OF OPERATION METHODS

By operating each of the air conditioning control switches as shown the diagram below, it is possible to enter
the diagnosis check mode.

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