Neutral Position Switch Malfunction - caphector.com
P1780. Park/Neutral Position Switch Malfunction. CIRCUIT DESCRIPTION. The neutral start switch detects the shift lever position and sends signals to the ECM.
CIRCUIT DESCRIPTION The neutral start switch detects the shift lever position and sends signals to the ECM. The ECM receives signals (NSW, R, D, 2 and L) from the park/neutral position switch. DTC No.
P1780
DTC Detecting Condition When driving under conditions (a), (b), (c) and (d) for 30 seconds or more, the park/neutral position switch is ON (N position). (2-trip detection condition) (a) Vehicle speed: 70 km/h (44 mph) or more (b) Engine speed: 1,500 - 2,500 (c) Engine load: 0.6 g/rev (d) Manifold absolute pressure: 350 mmHg or more
Trouble Area
Shot in park/neutral position switch circuit Park/neutral position switch ECM
2002 ECHO (RM884U)
Author:
Date:
359
DI-190 DIAGNOSTICS
-
AUTOMATIC TRANSAXLE
WIRING DIAGRAM N1 Park/Neutral Position Switch DL
ECM
7 R-Y
5 E7
D
17 E4
R
18 E4
2
19 E4
L
22 E4
NSW
Instrument Panel J/B
4 IE1 R-B 1E
3 IE1
RL 2 R-Y
3 RB R-B
7 IE1
4 2L
5
R-Y
G
G
14 8 IE1 LL G-W
GAUGE
1O 4
Ignition Switch
Instrument Panel J/B
4
B
5 ST2
B-Y
G-W
W-R
AM2
2
1 IG1
AM1
W-L
9 1E
13 1H
4 1E
6 1H
3 1E
4 1H
7 1O
15 1H
1 1O
7 1A
8 1O
2
AM1
*1
4
Battery
1
2 MAIN Fusible Link Block
*1: *2:
B-L
G
G-W
B
1 1C
1
W-R
B-G *2
ALT
R-Y
B
AM2
2
1
1 Engine Room R/B
Ex. Puerto Rico Puerto Rico
D07922
2002 ECHO (RM884U)
Author:
Date:
360
DI-191 DIAGNOSTICS
-
AUTOMATIC TRANSAXLE
INSPECTION PROCEDURE 1
Read PNP, REVERSE, 2ND and LOW signals. When using TOYOTA hand-held tester: PREPARATION: (a) Connect a hand-held tester to the DLC3. (b) Turn the ignition switch ON and TOYOTA hand-held tester main switch ON. CHECK: Shift lever into the P, R, N, 2 and L positions, and read the NSW, REVERSE, 2ND and LOW signals on the hand-held tester. OK:
(-)
Signal
2
2ND OFF → ON
L
LOW OFF → ON
D
DRIVE OFF → ON
R
REVERSE OFF → ON
P, N
NSW OFF → ON
When not TOYOTA using hand-held tester: PREPARATION: Turn the ignition switch ON. CHECK: Measure voltage between each of terminals NSW, R, D, 2 and L of ECM and body ground when the shift lever is shifted to the following positions. OK:
ON D
Shift range
NSW L 2 R
(+)
BE3840 D05644 D08440
Position
NSW-Body
ground
R-Body ground
D-Body ground
2-Body ground
L-Body ground
P
9 - 14 V
0V
0V
0V
0V
R
0V
9 - 14 V
0V
0V
0V
N
0V
0V
0V
0V
0V
D
0V
0V
9 - 14 V
0V
0V
2
0V
0V
0V
9 - 14 V
0V
L
0V
0V
0V
0V
9 - 14 V
HINT: *: The voltage will drop slightly due to lighting up of the back up light. OK
Check and replace the ECM.
NG 2002 ECHO (RM884U)
Author:
Date:
361
DI-192 DIAGNOSTICS
2
-
AUTOMATIC TRANSAXLE
Check park/neutral position switch. PREPARATION: Remove the park/neutral position switch. CHECK: Check continuity between each terminal shown below when the shift lever is moved to each position. Shift position
D06601
Terminal No. to continuity
P
3-5
6-9
R
3-4
-
N
1-3
6-9
D
3-8
-
2
2-3
-
L
3-7
-
OK: There is continuity. NG
Replace the park/neutral position switch.
OK
3
Check harness and connector between battery and park/neutral position switch, park/neutral position switch and ECM (See page IN-29 ).
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