Toyota T100 1996 Service Manual page 570

DI−306
DTC P1780
CIRCUIT DESCRIPTION
The park/neutral position switch detects the shift lever position and sends signals to the ECM.
The ECM receives signals (NSW, R, 2 and L) from the park/neutral position switch. When the signal is not
sent to the ECM from the park/neutral position switch, the ECM judges that the shift lever is in D position.
DTC No.
2 or more switches are ON simultaneously for R, N, 2 and L
positions
(2 trip detection logic)
When driving under conditions (a), (b) and (c) for 30 seconds
P1780
or more, 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
(c) Engine load: 0.6 g/rev
WIRING DIAGRAM
GR−R
B−O
4 1A 1A 2
Ignition Switch
W
*1 3RZ−FE
5VZ−FE
*2
1996 TOYOTA T100 (RM449U)
DIAGNOSTICS
Park/Neutral Position Switch Malfunction
DTC Detection Condition
Dio
Diode
17
3 W B−O
IE2
2
1
15
B B
IE1
IC
R/B No.2
14
6
AM1
W
2
IA3
− AUTOMATIC TRANSMISSION
S Short in park/neutral position switch circuit
S Park/neutral position switch
S ECM
Park/Neutral
Position Switch
3
V−W
P1
IE2
4 2
P−G
P1 P1
IE2
8
R−W
P1
IE2
5 6
*1
B−Y
P1 P1
*2
B−O
*1
B−Y
*2 B−O
R/B No.2
5 2 ALT
W
2 2
Trouble Area
Combination Meter
R 2 L
2
5
C12 C12 C12
3
V−W
6
P−G
16
R−B
*2
B−O
22
IE1
22
*1
B−Y
E4 E7
Battery
1
W
2
DI0W5−02
ECM
6
*1
15
L
E4
3
*2
16
*1
2
E4
*2
2
*1
17
R
E4
1
*2
B+
14
NSW
*1
*2
Q10012