Lexus ES300 (1997 year). Manual — part 425
DI0EH–01
CRUISE CONTROL SYSTEM Check Sheet
Inspector’s name:
Customer’s Name
Date of Vehicle
Registration No.
Registration Year
Frame No.
Odometer Reading
/ /
km
Mile
Condition of
Problem Occurrence
Date of Problem
How Often does
Occurrence
Problem Occur?
Vehicle Speed when
Problem Occurred
/ /
Continuous Intermittent ( Times a day)
km
Mile
Brought in
Auto cancel
occurs
Driving condition
City driving
Freeway
Up hill
Down hill
After cancel occurred, did the driver activate cruise control
again?
Yes
No
Cancel does not
occur
With brake ON
Except D position shift
At 40 km/h (25 mph) or less
When control SW turns to CANCEL position
Cruise control
malfunction
Slip to acceleration side
Slip to deceleration side
Hunting occurs
O/D cut off does not occur
O/D does not return
Switch
malfunction
SET
ACCEL
COAST
RESUME
CANCEL
Remains ON
Does not light up
Blinking
Symptoms
DTC Check
1st Time
2nd Time
Normal Code
Malfunction Code (Code )
Normal Code
Malfunction Code (Code )
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM
DI–477
629
1997 LEXUS ES300 (RM511U)
CUSTOMER PROBLEM ANALYSIS CHECK
DI0EI–01
N21862
CRUISE MAIN Indicator Light
BE4034
Indicator Light
1.5 sec.
0.5 sec.
ON
OFF
I00169
DLC2
TC
E1
DI–478
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM
630
1997 LEXUS ES300 (RM511U)
PRE–CHECK
1.
DIAGNOSIS SYSTEM
(a)
INDICATOR CHECK
(1)
Turn the ignition switch to ON.
(2)
Check that the CRUISE MAIN indicator light comes
on when the cruise control main switch is turned on,
and that the indicator light goes off when the main
switch is turned OFF.
HINT:
If the indicator check result is not normal, proceed to trouble-
shooting (See page
) for the combination meter section.
(b)
DTC CHECK
HINT:
If a malfunction occurs in the No. 1 vehicle speed sensors or ac-
tuator, etc. during cruise control driving, the ECU actuates
AUTO CANCEL of the cruise control and turns on and off the
CRUISE MAIN indicator light to inform the driver of a malfunc-
tion. At the same time, the malfunction is stopped in memory as
a diagnostic trouble code.
(c)
OUTPUT OF DTC USING DIAGNOSIS CHECK WIRE
(1)
Turn the ignition switch ON.
(2)
Using SST, connect terminals Tc and E
1
of DLC2.
SST
09843–18020
(3)
Read the DTC on the CRUISE MAIN indicator light.
BE4032
BE4033
I00021
Normal Code
0.25 sec.
0.25 sec.
ON
OFF
ON
OFF
4 sec.
1.5 sec.
0.5 sec.
2.5 sec.
0.5 sec.
1.5 sec.
Malfunction codes 11 and 21
Code 11
Code 21
N09348
LEXUS hand–held tester
LEXUS Break–out–box
S05334
N20674
Engine Room Junction Block No.2
ECU–B Fuse
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM
DI–479
631
1997 LEXUS ES300 (RM511U)
HINT:
If the DTC is not output, inspect the diagnosis circuit
(See page
As an example, the blinking patterns for codes; normal, 11 and
21 are shown in the illustration.
2.
ECU TERMINAL VALUES MEASUREMENT BY USING
LEXUS BREAK–OUT–BOX AND LEXUS HAND–HELD
TESTER
(a)
Hook up the break–out–box and LEXUS hand–held tes-
ter to the vehicle.
(b)
Read the ECU input/output values by following the
prompts on the tester screen.
(c)
Please refer to the LEXUS hand–held tester has a ”Snap-
shot” function. This records the measured data and is ef-
fective in the diagnosis of intermittent problems.
3.
USING LEXUS HAND–HELD TESTER
(a)
Hook up the LEXUS hand–held tester to the DLC2.
(b)
Monitor the ECU data by following the prompts on the tes-
ter screen.
HINT:LEXUS hand–held tester has a ”Snapshot” function
which records the monitored data.
Please refer to the LEXUS hand–held tester operator’s manual
for further details.
4.
DTC CLEARANCE
(a)
After completing repairs, the DTC retained in memory can
be cleared by removing the ECU–B fuse for 10 seconds
or more, with the ignition switch off.
(b)
Check that the normal code is displayed after connecting
the fuse.
N17520
N17520
N17520
DI–480
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM
632
1997 LEXUS ES300 (RM511U)
5.
PROBLEM SYMPTOM CONFIRMATION
(ROAD TEST)
(a)
SET INSPECTION
(1)
Push the main switch ON.
(2)
Drive at a desired speed (40 km/h (25 mph) or high-
er).
(3)
Press the control switch to the SET/COAST.
(4)
After releasing the switch, check that the vehicle
cruises at the desired speed.
(b)
ACCEL INSPECTION
(1)
Push the main switch ON.
(2)
Drive at a desired speed (40 km/h (25 mph) or high-
er).
(3)
Check that the vehicle speed is increased while the
control switch turned to RES/ACC, and that the ve-
hicle cruises at the set speed when the switch is re-
leased.
(4)
Momentarily press the control switch upward in the
RES/ACC and then immediately release it. Check
that the vehicle speed increases by about 1.5 km/h
(Tap–up function).
(c)
COAST INSPECTION
(1)
Push the main switch ON.
(2)
Drive at a desired speed (40 km/h (25 mph) or high-
er).
(3)
Check that the vehicle speed is decreased while the
control switch is turned to SET/COAST, and the ve-
hicle cruise at the set speed when the switch is re-
leased.
(4)
Momentarily press the control switch is turned to
SET/COAST, and then immediately release it.
Check that the vehicle speed decreases by about
1.5 km/h (Tap–down function).
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