Isuzu N-Series. Manual — part 1170
8-392 CAB AND CHASSIS ELECTRICAL
H-3
H-3
H-10
H-10
H-12
H-12
J-9
J-32
No.
Connector Face
006-014
1
2
3
4
5
6
006-015
1
2
3
4
5
6
003-010
3 2 1
003-009
1 2 3
022-001
1 2 3 4
13 14
5
6 7 8 9 10
15 16
17 18 19 20
11 12
21 22
022-002
9 8 7
20 19
6
5 4 3 2 1
18 17
16 15 14 13
22 21
12 11
10
000-001
003-018
1
2
3
J-50
J-128
J-155
J-155
L-2
L-2
N-2
N-6
No.
Connector Face
002-035
004-018
004-018
004-011
1
3
2
4
003-010
3 2 1
003-009
1 2 3
001-020
002-023
2 1
CAB AND CHASSIS ELECTRICAL 8-393
H-5
H-6, H-7
N-6
N-7
P-1
P-2
P-3
P-4
P-5
X-32
No.
Connector Face
002-022
1 2
001-020
000-004
000-006
000-006
000-004
000-002
004-004
1
2
3
4
X-33
No.
Connector Face
014-002
1 2 3
7 8 9 10
11
4
12
5
13
6
14
N5A2011E
1
2
1
2
1 2 3 4
5 6 7 8
9 10 11 12 13
14 15 16 17 18
2
1
2
1
4 3 2 1
8 7 6 5
13 12 11 10 9
18 17 16 15 14
H - 6
H - 7
H - 8
N8A5489E
8-394 CAB AND CHASSIS ELECTRICAL
Transmission Control System (Smoother)
General Description
“Smoother” is the name of a new-generation drive train
that provides benefits in terms of both life cycle costs
(low initial cost and maintenance cost, lower fuel con-
sumption, etc.) and easy driving. Smoother is a system
that adds an automatic transmission to the existing
Smoother, for even better fuel consumption and easier
driving. This is accomplished by installing a solenoid
system shift control box on the Smoother, which com-
bines a manual transmission with fluid coupling, so all
shifting is performed automatically in accordance with
signals from the transmission control module (TCM).
When starting moving the vehicle, depressing the brake
pedal and operating the change lever as on an automat-
ic vehicle causes a change lever position signal to be
detected by the TCM. This actuates the shift control box
solenoid and shifts the gear into the starting position or
the reverse position, and then engages the shift change
clutch (wet multi-disc clutch). (After the shift clutch en-
gages, creep force is generated the same as on an AT
vehicle.) Releasing the foot from the brake pedal and
pressing the accelerator pedal starts the vehicle moving
forward. If there is an up-shift or down-shift while run-
ning, the control unit determines the vehicle status
based on vehicle speed, accelerator opening angle, and
other factors, and shifts to the optimal gear automatical-
ly. If the driver moves the change lever in the “+” or “-”
direction, a gear change is indicated, so sequential man-
ual shifting is also possible. (Even during sequential
manual shifting, the transmission shifts to the starting
position when the vehicle is stopped.)
CAB AND CHASSIS ELECTRICAL 8-395
Parts Location
F-4, F-13, F-16,
F-17, F-22
H-15
F-28 FUSE
SBF1, SBF2, SBF5, SBF7, SBF8
X-18 ECM MAIN RELAY
X-19 GEAR SHIFTER RELAY
X-21 STARTER RELAY
X-26 STARTER CUT RELAY
B-1
H-17
H-4, H-5,
H-6, H-7
N-7 DOOR SW (RH)
N-19 SELECT SW
N-17 EMERGENCY SW
N-18 EMERGENCY SHIFT SW
B-417 PTO SWITCH
X-14 SMOOTHER
EMERGENCY RELAY
X-5 SMOOTHER MAIN RELAY
X-32 DIODE
B-425, B-426,
B-427, B-428
TCM
H-118
N-2
DOOR SW (LH)
H-119
H-118
H-119
J-237
SOLENOID & ATF TEMPERATURE SENSOR
J-50
NEUTRAL SW
J-223
SELECT STROKE SENSOR
J-234
SELECT SOLENOID
J-232
TURBINE SPEED SENSOR
J-236
SHIFT SOLENOID 2, 4, R
J-235
SHIFT SOLENOID 1, 3, 5
J-139
INPUT SPEED SENSOR
J-142
SHIFT STROKE SENSOR
N8A5601E
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