Isuzu N-Series. Manual — part 1052
CAB AND CHASSIS ELECTRICAL 8-313
B-52
For 4HK1-TC
Terminal No.
Connected to
1
Oil pressure
2
Vacuum SW
3
Charge
4
Parking / Rear fog
5
Illumination (+)
6
—
7
Illumination (
−)
8
Signal (tacho)
9
Ground (tacho)
10
Ground
11
—
12
+B
1
1
8
9
20
8
9
20
B-53
B-51
B-52
N8A0484E
8-314 CAB AND CHASSIS ELECTRICAL
B-53 (With Smoother)
B-51
*1: With Smoother
*2: Without Smoother
B-52
Terminal No.
Connected to
1
TCM
2
—
3
—
4
—
5
—
6
1st Start
7
ECONO
8
Smoother
9
—
10
—
11
—
12
—
Terminal No.
Connected to
1
Turn LH
2
Beam
3
—
4
Brake (*1) / — (*2)
5
Check Engine (*1) / Brake (*2)
6
Exhaust Brake
7
—
8
—
9
Brake Booster
10
Charge
11
Oil Pressure
12
ABS
13
— (*1) / Check Engine (*2)
14
—
15
Ground
16
Vehicle Speed Signal Output
17
Illumination +
18
Ignition
19
Rear Fog
20
ASR
Terminal No.
Connected to
1
4WD
2
—
3
Turn RH
4
—
5
Thermal
6
Fuel
7
TAM Pulse (
−)
8
TAM Pulse (+)
9
—
10
Sedimenter
11
Front Fog
12
—
13
—
14
—
15
Glow
16
Battery
17
Vehicle Speed Sensor
18
—
19
—
20
Ground
Terminal No.
Connected to
1
Battery
2
—
3
Ground
CAB AND CHASSIS ELECTRICAL 8-315
Removal
Preparation:
Disconnect the battery ground cable.
1. Meter Cluster
2. Meter Assembly
Remove the five screws.
Disconnect the meter connectors.
Installation
To install, follow the removal steps in the reverse order.
Speedometer
The speedometer is made up of the cross coil type am-
meter (movement) that displays indications, the stepper
motor that drives and adds up the odometer and trip
meter, and the driving circuit (printed circuit board) that
makes exchanges between the pulse signals and the
current.
N8A0325E
N8A0326E
N8A0327E
TRIP
ODO
A
B
km/h
0
20
40
60
80 100
120
140
160
N8A0328E
8-316 CAB AND CHASSIS ELECTRICAL
On-vehicle Service
Check the meter display accuracy and the operation of
the odometer with the speedometer tester.
Notice:
Inappropriate tire inflation may affect the accuracy of the
odometer.
(To conduct this test, refer to the tester manufacturer's
instruction manual.)
Since the meter display permissible levels above are
specifications solely for the meter, they are to be used
as reference values when conducting on-vehicle ser-
vice.
Except 4HK1-TC
For 4HK1-TC (General Export)
For 4HK1-TC (Europe)
Individual Inspection
Remove the speedometer from the meter assembly and
measure the resistance and the current consumption
between each terminals.
Replace the speedometer when the result of inspection
is found abnormal.
Removal
Preparation:
Disconnect the battery ground cable.
Tester display speed
Meter display
permissible level
20 km/h
17.5 — 22.5 km/h
40
37.5 — 42.5
60
57.5 — 62.5
80
77.5 — 82.5
100
97.6 — 103.4
120
117.6 — 123.4
140
137.6 — 143.4
Tester display speed
Meter display
permissible level
20 MPH
18.3 — 21.7 MPH
40
38.3 — 41.7
60
58.3 — 61.7
80
77.8 — 82.8
TRIP
ODO
A
B
MPH
0
10
20
30
40
50 60
70
80
90
100
N8A0330E
Tester display speed
Meter display
permissible level
40 km/h
37 — 41 km/h
60
58 — 62
80
77.5 — 82.5
100
97.5 — 103
120
117 — 122.5
140
137.5 — 143
Tester display speed
Meter display
permissible level
20 km/h
20 — 22.5 km/h
40
40 — 42.5
60
60 — 63.2
80
79.7 — 83.4
Terminal symbol
Resistance value
IGN — GND
58
±20 kΩ
SEN — GND
70
±20 kΩ
4P — GND
∞
IGN
GND
SENSOR
B
4 Pulse output
N8A0332E
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