Wiring diagram di0a501 a00241 lock batt be6653 p24330

WIRING DIAGRAM
DI0A5–01

A00241
LOCK
BATT(+)
BE6653
P24330
S04162
Engine Room J/B
EFI Fuse
– DIAGNOSTICS ENGINE
DI–127
279 AuthorĂ: DateĂ:
1997 LEXUS ES300 (RM511U)
INSPECTION PROCEDURE
1 Check voltage between terminal BATT of ECM connector and body ground.
PREPARATION:
Remove the glove compartment (See page SF–64 ).
CHECK:
Measure voltage between terminal BATT of ECM connector
and body ground.
OK:
Voltage: 9 ∼ 14 V
OK Check and replace ECM (See page IN–27 ).
NG
2 Check EFI fuse.
PREPARATION:
Remove the EFI fuse from the engine room J/B.
CHECK:
Check continuity of EFI fuse.
OK:
Continuity
NG Check for short in all harness and components
connected to EFI fuse.
OK
Check and repair harness or connector
between battery, EFI fuse and ECM.

DI–128
– DIAGNOSTICS ENGINE
280 AuthorĂ: DateĂ:
1997 LEXUS ES300 (RM511U)
DTC P1780 Park/Neutral Position Switch Malfunction
CIRCUIT DESCRIPTION
The park/neutral position switch go on when the shift lever is in the N or P shift position. When it goes on
terminal NSW of the ECM is grounded to body ground via the starter relay, thus the terminal NSW voltage
becomes 0V. When the shift lever is in the D, 2, L or R position, the park/neutral position switch goes off,
so the voltage of ECM. Terminal NSW becomes battery voltage, the voltage of the ECM internal power
source. If the shift lever is moved from the N position to the D position, this signal is used for air–fuel ratio
correction and for idle speed control (estimated control), etc.
DTC No. DTC Detecting Condition Trouble Area
2 or more switches are ON simultaneously for ”N”, ”2”, ”L” and
”R” positions
(2 trip detection logic)
Sh t i k/ t l iti it h i it
P1780
When driving under conditions (a) and (b) for 30 sec. or more
the park/neutral position switch is ON (N position):
(2 trip detection logic)
(a) Vehicle speed: 70 km/h (44 mph) or more
(b) Engine speed: 1,500 ∼ 2,500 rpm
D Short in park/neutral position switch circuit
D Park/neutral position switch
D ECM
HINT:After confirming DTC P1780 use the LEXUS hand–held tester to confirm the PNP switch signal from
”CURRENT DATA”.
DI0A6–01

D00107
C8 C8 C8
II2
ID4
ID4
ID1
Combination Meter
ECM
Ignition Switch
Battery
Starter
Security ECU
E7
E7
E7
L
2
R
B+
NSW
14
J29
B B
B–W
R–B
R–B
J27
J28
J27
Y
O
R–B
IG3
16
13
J29
D
D D
1
10
15
L–W
Y
J29
E
E E
Y
Y
4
3
8
5 6
2
Park/Neutral
Position Switch
J24
1H
1V
10
5
5
6
3
11 10
2
J8
J7
C B
*1
*1
2J 2B
2D 2K
IG2
IF
F9 F9
F4
F6
ALT
4
2 W
1K
1K
1B 1J
AM1
GAUGE
R–L
R–B
R–B
1
J28
1
R–L
R–L R–L
A A
1
ST Relay
1
2
1
1
G–B
FL MAIN
*1: TMC Made → GR, TMM Made → B–O
B
1
2
3
11
1
2
3
5
L
R 2
6
11
8
C A
C
R–B
O
Y
F
F
J26
II2 II2
B–W
B–W
B–W
B B
R–B
IG3
E10
Instrument
Panel J/B
Instrument
Panel J/B
Junction
Connector
Junction
Connector
Junction
Connector
Junction
Connector
Junction
Connector
Fusible
Link Block
Engine Room
J/B
Junction
Connector
5 9
– DIAGNOSTICS ENGINE
DI–129
281 AuthorĂ: DateĂ:
1997 LEXUS ES300 (RM511U)
WIRING DIAGRAM

BE3840
D00052
D00042
ON
NSW
L
2
R
Position
P,N
R
D
2
L
NSW–Body
ground
R–Body
ground
2–Body
ground
L–Body
ground
0 V
0 V 0 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
9 ∼ 14 V*
9 ∼ 14 V
9 ∼ 14 V
9 ∼ 14 V
9 ∼ 14 V
9 ∼ 14 V
9 ∼ 14 V*
DI–130
– DIAGNOSTICS ENGINE
282 AuthorĂ: DateĂ:
1997 LEXUS ES300 (RM511U)
INSPECTION PROCEDURE
1 Read PNP, REVERSE, 2ND and LOW signals.