Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota 4Runner 1996-2003 Approved SIL techinfo.toyota.com ileaf 02toyrm 02toypdf 02rmsour 2002 024runne di at cip1780
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DI-203
DIAGNOSTICS - AUTOMATIC TRANSMISSION
DI6AH-03
DTC P1780 Park/Neutral Position Switch Malfunction
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. DTC Detection Condition Trouble Area
2 or more switches are ON simultaneously for R, N, 2 and L
positions (2 - trip detection logic).
When driving under conditions 1. and 2. for 30 seconds or S Short in park/neutral position switch circuit
P1780 more, the park/neutral position switch is ON (N position) S Park/neutral position switch
(2 t i detection logic).
trip d t ti l i ) S ECM
1. Vehicle speed: 70 km/h (44 mph) or more
2. Engine speed: 1,500 - 2,500 rpm
2002 4RUNNER (RM887U)
Author : Date : 379
DI-204
DIAGNOSTICS - AUTOMATIC TRANSMISSION
WIRING DIAGRAM
Center J/B
F7 4WD ECU
2 3 3 Engine Control
B GR-B
3E 3E II1 Modal
C/C
16 (4WD)
B
6 7.5A STA 3 W-R
E12 D
1F 1I G-B (2WD)
25
17
Driver Side J/B D B
W-R E12 NSW
B
(4WD) 9 3
P1 II1 LG
E12 L
Park / Neutral
Position Switch Driver Side J/B 4
3 W-L
B-W E12 R
1D 6
9 6
V
19 4 5 E12 2
RL W-L W-L
II4 1D 1H 5
2
Combination Meter
Junction
Connector W-L 3 R
3 DL W-R
J7 J8 C26
7
10 C A
W-R
II1 J7 J8 5 D
2L V
4 C A
5 C26
V W-R
II1
LL LG
8 4
II1 6 2
V
C26
20 7 10A GAUGE 2
B-Y B-Y
II4 1F 1I 7 L
LG
I14 Ignition Switch C26
Driver Side J/B
2 AM1 IG1 4 B-Y J4
Junction 17 C27
G-B ST2 AM2 7 W-R Connector
8
A W-B
W
120A ALT 40A AM1
Battery 2 2 IE
W 1 2 1 2
30A AM2
2
1 2
Engine Room R/B D10511
2002 4RUNNER (RM887U)
Author : Date : 380
DI-205
DIAGNOSTICS - AUTOMATIC TRANSMISSION
INSPECTION PROCEDURE
1 Read PNP, REVERSE, 2ND and LOW signals.
When using hand-held tester:
PREPARATION:
(a) Remove the DLC3 cover.
(b) Connect a hand-held tester to the DLC3.
(c) Turn the ignition switch ON and hand-held tester main
switch ON.
CHECK:
Shift lever into the P, R, D, N, 2 and L positions, and read the
PNP, REVERSE, 4TH/DRIVE 2ND and LOW signals on the
TOYOTA hand-held tester.
OK:
Shift position Signal
2 2ND OFF ON
L LOW OFF ON
D 4TH / DRIVE OFF ON
R REVERSE OFF ON
P, N PNP OFF ON
2002 4RUNNER (RM887U)
Author : Date : 381
DI-206
DIAGNOSTICS - AUTOMATIC TRANSMISSION
When not using hand-held tester:
ON PREPARATION:
R 2 L
Turn the ignition switch ON.
CHECK:
Measure voltage between terminals NSW, 2, L and R of ECM
and body ground when the shift lever is shifted to the following
D NSW positions.
OK:
D10512 NSW-Body R-Body D-Body 2-Body L-Body
Position ground ground ground ground
ground
P, N 0V 0V 0V 0V 0V
R 9 - 14 V* 7.5 - 14 V* 0V 0V 0V
D 9 - 14 V 0V 7.5 - 14 V 0V 0V
2 9 - 14 V 0V 0V 7.5 - 14 V 0V
L 9 - 14 V 0V 0V 0V 7.5 - 14 V
HINT:
*: The voltage will drop slightly due to lighting up of the back up
light.
OK Check and replace the ECM (See page IN-28 ).
NG
2002 4RUNNER (RM887U)
Author : Date : 382
DI-207
DIAGNOSTICS - AUTOMATIC TRANSMISSION
2 Check park/neutral position switch.
PREPARATION:
(a) Jack up the vehicle.
(b) Disconnect the park/neutral position switch connector.
CHECK:
54 321
Check continuity between each terminal shown below when the
9 8 7 6 shift lever is moved to each position.
OK:
Shift Position Terminal No. to continuity Terminal No. to continuity
D06561
P 6-9 1-3
R 2-3 -
N 6-9 3-5
D 3-7 -
2 3-4 -
L 3-8 -
NG Replace the park/neutral position switch.
OK
Repair or replace harness and connector between battery and park/neutral position switch, park/
neutral position switch and ECM (See page IN-28 ).
2002 4RUNNER (RM887U)
Author : Date : 383
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