Lexus RX300 (MCU15). Manual — part 311
N17520
N17520
N17520
DI–476
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM
LEXUS RX300 (RM785E)
4.
PROBLEM SYMPTOM CHECK (ROAD TEST)
(a)
Inspect the SET switch.
(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)
Inspect the ACCEL switch.
(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 increases while the
control switch is turned to RES/ACC, and that the
vehicle cruises at the set speed when the switch is
released.
(4)
Momentarily raise the control switch upward to the
RES/ACC position and then immediately release it.
Check that the vehicle speed increases by approx.
1.5 km/h (Tap–up function).
(c)
Inspect the COAST switch.
(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 decreases while the
control switch is turned to SET/COAST, and the ve-
hicle cruises at the set speed when the switch is re-
leased.
(4)
Momentarily pull the control switch down to SET/
COAST, and then immediately release it. Check
that the vehicle speed decreases by about 1.5 km/h
(Tap–down function).
N17520
N17520
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM
DI–477
LEXUS RX300 (RM785E)
(d)
Inspect the CANCEL switch.
(1)
Push the main switch ON.
(2)
Drive at a desired speed (40 km/h (25 mph) or high-
er).
(3)
When operating one of the following operations,
check that the cruise control system is cancelled
and that the normal driving mode is reset.
S
Depress the brake pedal
S
Shift to except D position
S
Push the main switch OFF
S
Pull the cruise control switch to CANCEL
(e)
Inspect the RESUME switch.
(1)
Push the main switch ON.
(2)
Drive at a desired speed (40 km/h (25 mph) or high-
er).
(3)
When operating one of the following operations
check that the cruise control system is cancelled
and that the normal driving mode is reset.
S
Depress the brake pedal
S
Shift to except D position
S
Push the main switch OFF
S
Pull the cruise control switch to CANCEL
(4)
After the control switch is turned to RES/ACC at the
driving speed of more than 40 km/h (25 mph), check
that the vehicle restores the speed prior to the can-
cellation.
N17520
(1)
(2)
(1)
No.
Operation Method
CRUISE MAIN Indicator Light
Blinking Pattern
Diagnosis
1
Turn SET/COAST switch ON
2
Turn RES/ACC switch ON
3
Turn CANCEL switch ON
Turn stop light switch ON
Depress brake pedal
Turn PNP switch OFF
(Shift to except D position)
4
Drive at about 40 km/h
(25 mph)or higher
Drive at about 40 km/h
(25 mph) or below
Light
ON
OFF
Light
ON
OFF
Light
ON
OFF
Switch ON
Switch OFF
Light
ON
OFF
Switch OFF
Switch ON
SET/COAST switch circuit
is normal
RES/ACC switch circuit
is normal
CANCEL switch circuit
is normal
Stop light switch circuit
is normal
PNP switch circuit is
normal
Vehicle Speed Sensor is
normal
Light
ON
OFF
Light
ON
OFF
1sec.
0.25 sec.
0.25 sec.
DI–478
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM
LEXUS RX300 (RM785E)
5.
INPUT SIGNAL CHECK
HINT:
(1) For check No.1 ∼ No.3:
Turn ignition switch ON.
(2) For check No.4:
S
Jack up the vehicle.
S
Start the engine.
S
Shift to D position.
(a)
Pull the control switch to SET/COAST or RES/ACC posi-
tion and hold it down or up (1).
(b)
Push the main switch ON (2).
(c)
Check that the CRUISE MAIN indicator light blinks twice
or 3 times repeatedly after 3 seconds.
(d)
Turn the SET/COAST or RES/ACC switch OFF.
(e)
Operate each switch as listed in the table below.
(f)
Read the blinking pattern of the CRUISE MAIN indicator
light.
(g)
After performing the check, turn the main switch OFF.
HINT:
When 2 or more signals are input to the ECU, the lowest num-
bered code will be displayed 1st.
DI08I–13
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM
DI–479
LEXUS RX300 (RM785E)
DIAGNOSTIC TROUBLE CODE CHART
If a malfunction code is displayed during the DTC check, check the circuit listed for that code in the table
below and proceed to the appropriate page.
DTC No.
(See Page)
Circuit Inspection
Trouble Area
11, 15
(DI–484)
Actuator Motor Circuit
S
Actuator motor
S
Harness or connector between cruise control ECU and
actuator motor
S
Cruise control ECU
12
(DI–486)
Actuator Magnetic Clutch Circuit
S
STOP Fuse
S
Stop light switch
S
Actuator magnetic clutch
S
Harness or connector between cruise control ECU and
actuator magnetic clutch, actuator magnetic clutch and body
ground
S
Cruise control ECU
14
(DI–490)
Actuator Mechanical Malfunction
S
Actuator motor (actuator lock: motor, arm)
S
Cruise control ECU
21
(DI–492)
Open in Vehicle Speed Sensor Circuit
S
Combination meter
S
Harness or connector between cruise control ECU and com-
bination meter, combination meter and vehicle speed sensor
S
Vehicle speed sensor
S
Cruise control ECU
23
(DI–495)
Vehicle Speed Signal Abnormal
S
Vehicle speed sensor
S
Cruise control ECU
41
Cruise control ECU
S
Cruise control ECU
42
Source voltage drop
S
Power source
51
(DI–496)
Idle Signal Circuit
S
Throttle position sensor
S
Harness or connector between Engine and ECT ECU and
throttle position sensor
S
Harness or connector between cruise control ECU and ECM
S
Cruise control ECU
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст