Lexus ES300 (1997 year). Manual — part 430
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM
DI–497
649
1997 LEXUS ES300 (RM511U)
4
Check vehicle speed sensor (See page
NG
Replace vehicle speed sensor.
OK
Check and replace cruise control ECU
(See page
).
DI–498
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM
650
1997 LEXUS ES300 (RM511U)
DTC
23
Vehicle Speed Signal Abnormal
CIRCUIT DESCRIPTION
See page
DTC No.
Detection Item
Trouble Area
23
Vehicle speed sensor pulse is abnormal.
Vehicle speed sensor
Cruise control ECU
WIRING DIAGRAM
See page
INSPECTION PROCEDURE
1
Check vehicle speed sensor (See page
NG
Replace vehicle speed sensor.
OK
Check and replace cruise control ECU
(See page
).
DI0ES–01
N21219
Cruise Control ECU
CCS
W–L
W
Cruise Control Switch
Main Switch
Control Switch
1J
W–B
5
3
8
W–B
MAIN
CANCEL
SET/COAST
RES/ACC
A
11
10
4
Junction
Connector
J8
II
J8
1J
Junction
Connector
Instrument
Panel J/B
7
C14
C14
CMS
J15
C12
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM
DI–499
651
1997 LEXUS ES300 (RM511U)
DTC
32
Control Switch Circuit (Cruise Control
Switch)
CIRCUIT DESCRIPTION
This circuit carries the SET/COAST, RESUME/ACCEL and CANCEL signals (each voltage) to the ECU.
DTC No.
Detection Item
Trouble Area
32
Short in control switch circuit.
Cruise control switch
Harness or connector between cruise control ECU and
cruise control switch, cruise control switch and body ground
Cruise control ECU
WIRING DIAGRAM
DI0EU–01
Input Signal
Indicator Light
Blinking Pattern
SET/COAST
switch
RESUME/ACCEL
switch
CANCEL switch
2 Pulses
ON
OFF
ON
OFF
3 Pulses
ON
OFF
SW OFF
SW ON
AB0119
N19911
I00739
ON
CCS
(–)
(+)
DI–500
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM
652
1997 LEXUS ES300 (RM511U)
INSPECTION PROCEDURE
1
Input signal check.
PREPARATION:
See input signal check on page
.
CHECK:
Check the indicator light operation when each of the SET/
COAST, RESUME/ACCEL and CANCEL is turned on.
OK:
SET/COAST, RESUME/ACCEL switch
The signals shown in the table on the left should be
output when each switch is ON. The signal should
disappear when the switch is turned OFF.
CANCEL switch
The indicator light goes off when the cancel switch is
turned ON.
OK
Wait and see.
NG
2
Check voltage between terminals CCS of cruise control ECU connector and body
ground.
PREPARATION:
(a)
Remove the ECU with connector still connected.
(b)
Turn ignition switch ON.
CHECK:
Measure voltage between terminals 18 of ECU connector and
body ground, when each of the SET/COAST, RESUME/AC-
CEL and CANCEL is turned ON.
Switch position
Resistance (V)
Neutral
10 – 16 V
RES/ACC
0.8 – 3.7 V
SET/COAST
2.5 – 6.3 V
CANCEL
4.2 – 8.8 V
NG
Proceed to next circuit inspection shown on
problem symptom table (See page
OK
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