Lexus ES300 (1997 year). Manual — part 401
–
DIAGNOSTICS
POWER SEAT CONTROL SYSTEM
DI–381
533
1997 LEXUS ES300 (RM511U)
2
Check harness and connector between Seat Position Control ECU and motor
(See page
).
NG
Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown on
matrix chart (See page
).
N21262
Reclining Position Sensor
Rear Vertical
Position Sensor
Front Vertical
Position Sensor
Slide Position
Sensor
Seat Position Control ECU
PVCC
SSRR
SSRV
SSFV
SSRS
SGND
LG–R
LG–B
LG
BR
V–W
GR
4
BR
BS2
9
V–W
BR
3
2
10
1
11
V–W
V–W
V–W
1
BR
BR
BR
BR
1
1
1
2
2
2
2
3
3
3
3
S15
IH
S15
S15
S15
S15
S15
N21254
Seat Position Control ECU
Connect
(–)
(+)
PVCC
4
DI–382
–
DIAGNOSTICS
POWER SEAT CONTROL SYSTEM
534
1997 LEXUS ES300 (RM511U)
Position Sensor Power Source Circuit
CIRCUIT DESCRIPTION
This circuit provides power to the slide, front vertical and reclining sensors.
WIRING DIAGRAM
INSPECTION PROCEDURE
1
Check voltage between terminal PVCC of Seat Position Control ECU connector
and body ground.
PREPARATION:
Remove Seat Position Control ECU with connectors still con-
nected.
CHECK:
While operating the Power Seat Control Switch and moving the
seat, check voltage between terminal PVCC of Seat Position
Control ECU connector and body ground.
OK:
Voltage: 7.2 – 8.8 V
OK
Proceed to next circuit inspection shown on
matrix chart (See page
NG
DI0G6–01
–
DIAGNOSTICS
POWER SEAT CONTROL SYSTEM
DI–383
535
1997 LEXUS ES300 (RM511U)
2
Check harness and connector connected to terminal PVCC of Seat Position Con-
trol ECU (See page
CHECK:
Check for open or short in the harness and check connectors for the position sensor power source circuit
outlined in the diagram with a thick line (–). (See page
NG
Repair or replace harness or connector.
OK
Check and replace Seat Position Control
ECU.
BE3991
1 pulse output per one
turn of motor
Position Sensor
(in Motor)
8 V
0 V
ECU
N14754
Example: Slide Motor
Motor
Sensor
(+)
2
(+)
(–)
(–)
1
3
1
2
DI–384
–
DIAGNOSTICS
POWER SEAT CONTROL SYSTEM
536
1997 LEXUS ES300 (RM511U)
Position Sensor Circuit
CIRCUIT DESCRIPTION
The position sensor senses movement of the seat and send
pulse signals to the ECU. The position sensor sends pulse to
the ECU in proportion to the amount of seat movement, as
shown in the diagram on the left.
The ECU uses the number of pulses to constantly calculate the
position relative to the memory position and returns the seat to
the memorized position.
If a malfunction occurs in a position sensor and a sensor signal
is not in put to the ECU even when the motor operates, the ECU
prohibits return operation.
WIRING DIAGRAM
See page
INSPECTION PROCEDURE
1
Check position sensor.
PREPARATION:
Disconnect the connector of the sensor and the connector of
the motor leading to the sensor.
CHECK:
(a)
Connect positive
lead to terminal 3 of sensor and nega-
tive
lead to terminal 2.
(b)
Measure voltage between terminal 1 of sensor and body
ground when battery positive voltage is applied between
terminals 1 and 2 of motor connector.
HINT:
When the battery positive voltage is applied the motor connec-
tor terminals,
and
are interchangeable.
OK:
Condition
Voltage
Motor stopped
(Check several times with the motor in a
different position each time.)
0 V or battery positive voltage according
to stop position.
with motor turning
half of battery positive voltage
NG
Replace position sensor.
OK
DI0G9–01
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст