engine ISUZU TF SERIES 2004 Manual PDF

ELECTRICAL-BODY AND CHASSIS 8A-257
TACHOMETER
1. Tachometer does not function when engine is running

Checkpoint Trouble Cause Countermeasure

Replace the tacho sensor, or
repair open circuit or
connector contact Tacho sensor malfunction, or
open circuit or poor connector
contact
NG

Replace the case baseboard
assy

Tachometer function

Tachometer malfunction
NG OK
Pulse between connector
B-24 and the ground when
engine is running (Should be
pulse present)



2. Meter pointer fluctuates
(May be wide fluctuation)


Replace the case baseboard
assy

Tachometer malfunction
NG
Use a meter tester to check
the tachometer function

ELECTRICAL-BODY AND CHASSIS 8A-261
2. Even when the parking brake lever is pulled, the indicator light does not go off

Checkpoint Trouble Cause Countermeasure

Adjust the SW. installation
position or replace the parking
brake SW. Incorrect the parking brake
SW. adjustment or brake SW.
faulty
NG Thermo unit malfunction
Replace the brake fluid level
SW., or vacuum SW., or
repair a short circuit between
the parking brake SW.
connector 1
C-39
(Lever: 1
R-4) and 9 B-23
or the brake fluid level SW.
connector 2
C-37 and 9
B-23, (or the vacuum SW.
connector 1
C-38 and 9
B-23 : 4JH1-TC ONLY)
Check to see if the indicator
light goes off when the parking
brake SW. connector 1
C-39
(Lever: 1
R-4) is
di t d
Brake fluid level SW. or
vacuum SW. faulty or short
circuit
NG OK

Parking brake SW. installation
position and function




3. Oil pressure warning light does not go off while engine is running


Refer to ENGINE Section

Refer to ENGINE Section
NG Thermo unit malfunction

Repair a short circuit between
1
E-1 and 3 B-24

Check to see the warning light
goes off when the oil pressure
SW. connector
1
E-1 is disconnected


Short circuit


Replace the oil pressure unit
(or the oil pressure SW.)
Continuity between the oil
pressure SW. connector
1
E-1 and the body ground
when the engine is operating


Oil pressure unit (or oil
pressure SW) faulty
NG NG OK
OK

Engine oil pressure

ELECTRICAL-BODY AND CHASSIS 8A-269

SPEEDOMETER AND TACHOMETER
Speedometer On-Vehicle Inspection
Check the speedometer accuracy with a speedometer tester.
Carefully follow the tester manufacturer’s instructions.

Manual Transmission
RTW38DSH000201


Auto Transmission
RTW38DSH000101

km/h meter km/h

Permissible Range

Indication
G.EXP EC, SAUDI
ISRAEL, SA
20 17.5 - 22.5 20 – 25
40 37.5 - 42.5 40 – 45
60 57.5 - 62.5 60 – 65
80 77.5 - 82.5 80 – 85
100 97.6 - 103.4 99.8 – 105.6
120 117.6 - 123.4 119.8 – 125.6
140 137.6 - 143.4 139.8 – 145.6
160 157.2 - 163.8 159.4 - 166

Auto Transmission (mPH)





RTW48ASH000201

mPH meter km/h

Permissible Range
Indication
G.EXP UK
20 18.5 - 21.5 20 – 23
40 48.5 - 41.5 40 – 43
60 58.5 - 61.5 60 – 63
80 79.1 - 82.5 80 – 83.4
100 98.9 – 102.7 99.8 – 103.6







Tachometer On-Vehicle Inspection
1. Attach a tune-up tester to the engine.
2. Start the engine.
3. Compare the tachometer reading and the tester reading.
If the tachometer indication is outside the permissible
range, the tachometer must be replaced.
4. Gradually increase and decrease the engine speed.
Note the movement of the tachometer needle.
If the needle movement is sluggish, the tachometer must be
replaced.

8A-274 ELECTRICAL-BODY AND CHASSIS





Terminal Connector No. B-23
No. C24SE
1
ABS CONT. (BRAKE)
2


3


4


5


6


7


8


9
BRAKE
10
CHARGE
11
TURN (RIGHT)
12


13


14


15


16


17
ILLUMI (-)
18
ILLUMI (+)

Terminal Connector No. B-24
No. C24SE
1


2
4LO
3
OIL PRESSURE
4


5
4WD
6
CHECK 4WD
7


8


9
SPEED (+)
10
4P OUTPUT
11


12
STARTER
13
TEMP
14
FUEL
15
FRONT FOG
16


17
CHECK ENGINE
18
AIR BAG
19
SEAT BELT
20
BEAM (+)
21
TURN (LEFT)
22
BEAM (-)
23
BEAM (+)
24


25


26
POWER GND
27
SPEED (-)
28
GND UNIT
29
+B
30
IGN

8A-276 ELECTRICAL-BODY AND CHASSIS


Connector No. B-24
Terminal Connector place SOUTH
AFRICA SAUDI
ARABIA ISRAEL EC UK OTHER
1
SEDIMENTER
2
4LO
3
OIL PRESS
4
4WD
5
CHECK 4WD
6
GLOW
7
POWER DRIVE
8








9
SPEED (+)
10
4P OUTPUT
11
TACHO
12
STARTER
13
TEMP
14
FUEL
RR FOG


15
FRONT FOG






16
ABS CONT. (ABS)
17
CHECK ENGINE
18
AIR BAG
SEAT BELT 19
LOW COOLANT





CRUISE SET



20
BEAM (+)




21
TURN (LEFT)
22
BEAM (-)
BEAM (+)


23
FRONT FOG




24
3rd START (A/T)
25








26
POWER GND
27
SPEED (-)
28
GND UNIT
29
+B
30
IGN

8A-278 ELECTRICAL-BODY AND CHASSIS
Low Fuel Indicator Light Inspection
1. Disconnect the fuel tank unit wire connector.
2. Turn the key switch on. Check that the bulb lights.
If operation is not correct, remove and check the bulb or circuit.
or If check whether low fuel turns on fuel input (B-24) at the
time of open and key on.
 meter is check at low fuel
140R300006





Check level sensor operation
1. Remove the fuel tank unit.
2.
Apply battery voltage between terminal (B) and (C) through
a 1.12 watt bulb. Check that the bulb lights.
Note:
It will take a short time for the bulb light.
3. Submerge the sensor in fuel. Check that the bulb goes out.
If operation is not correct, replace the fuel tank unit.

BRAKE SYSTEM WARNING LIGHT
The brake system warning light comes on while the parking
brake is set and the engine run position.
Note:
The parking brake indicator light circuit is designed to
prevent driving of the vehicle with the parking brake on.
It does not indicate the condition of the parking brake
system.



The parking brake switch is in parallel with the brake fluid
switch.



The brake system warning light also comes on when reservoir
brake fluid level falls below the specified limit with the parking
brake released and the engine run position.

8A-422 ELECTRICAL-BODY AND CHASSIS


No. Connector face No. Connector face
C-1
Gray
Side turn lamp-RH C-22
Front turn lamp-RH
C-2
Silver
Engine room-RH ground C-23
NOT USED
C-3
(6VE1)
(4JH1-TC)

INT Relay C-24
Triple pressure switch
C-4
Light-
blue
Front wiper motor C-25
NOT USED
C-5
~
C-16 NOT USED C-26
Black
Head lamp-LH
C-17
Gray
Front wiper motor C-27
Clearance lamp-LH
C-18

Clearance lamp-RH C-28
~
C-29 NOT USED
C-19
Black
Head lamp-RH C-30

BlackEngine hood switch
C-20
(6VE1)
(4JH1-TC)

Horn ; high note C-31
~
C-34 NOT USED
C-21
Black
Horn ; Low note C-35
Gray Side turn lamp-LH

ELECTRICAL-BODY AND CHASSIS 8A-423


No. Connector face No. Connector face
C-36
Silver
Engine room-LH ; Ground C-54
(6VE1)
(4JH1-TC)
OrangeABS sensor Front-LH
C-37
Black
Brake fluid level switch C-55
BrownThermo AMP
C-38
(4JH1-TC)
Vacuum switch C-56
(C24SE)
ECM
C-39

Parking brake switch (stick type) C-56
(4JA1-TC
4JH1-TC)
ECM-A
C-40
~
C-43 NOT USED C-57
(4JA1-TC
4JH1-TC)
ECM-B
C-44
White
Stop lamp switch C-58
~
C-62 NOT USED
C-45
~
C-49 NOT USED C-63
(6VE1)
(4JH1-TC)
Gray Front Fog lamp-RH
C-50

Condenser fan C-64
(6VE1)
(4JH1-TC)
Gray Front Fog lamp-LH
C-51
~
C-52 NOT USED C-65
~
C-66 NOT USED
C-53
(6VE1)
(4JH1-TC)
Orange ABS sensor Front-RH C-67
(6VE1)
(4JH1-TC)
BlackEHCU

8A-428 ELECTRICAL-BODY AND CHASSIS


No. Connector face No. Connector face
E-1
(4JH1-TC)
White Oil pressure switch E-10
SilverEngine ground
E-2
(C24SE)
(6VE1)


Magnetic clutch E-11
(6VE1)

Neutral switch
E-3
(4JH1-TC)
Black
Magnetic clutch AC COMP E-11
(4JH1-TC)
Natural
green
Neutral switch
E-4
~
E-5 NOT USED E-12
(6VE1)

Neutral switch
E-6
(C24SE)
(6VE1)


(6VE1) Fuel injector (C24SE) E-12
(4JH1-TC)
Natural
green
Neutral switch
E-6
(4JH1-TC)

Injector pump E-13
~
E-17 NOT USED
E-7
(C24SE)
(6VE1)


(6VE1) Fuel injector (C24SE) E-18
(C24SE)

Ignition coil
E-8
(C24SE)
(6VE1)


(6VE1) Fuel injector (C24SE) E-19
(4JH1-TC)
Blue Thermo meter unit
E-9
(C24SE)
(6VE1)


(6VE1) Fuel injector (C24SE) E-20
~
E-21 NOT USED
E-9
(4JH1-TC)
Gray T.D.C sensor E-22
(4JH1-TC)
BrownTPS 1 main

ELECTRICAL-BODY AND CHASSIS 8A-431


No. Connector face No. Connector face
E-71

NOT USED E-80
(6VE1)
Cylinder revolution
E-72
(C24SE)
(6VE1)
Engine earth-A E-81
(6VE1)
Speed sensor
E-73
(6VE1)
Engine earth-A E-82
(6VE1)
Transmission wire
E-74
(C24SE)
(6VE1)
Engine earth-B E-83
(6VE1)
Oil temperature sensor
E-75
(C24SE)
(6VE1)
Oil pressure switch E-84
(C24SE)
Knock sensor
E-76
(6VE1)
EGR valve E-85
(C24SE)
MAP sensor
E-77
(C24SE)
O2 sensor E-86
(4JA1-L)
SilverThermo switch; QOS
E-77
(6VE1)
O2 sensor RH-Front E-87
(4JA1-L)
WhiteSolenoid CSD
E-78
(6VE1)
O2 sensor LH-Front E-88
(4JA1-L)
SilverThermo switch; EGR
E-79
(6VE1)
Neutral start switch E-89
(4JA1-L)
White

Immobilizer engine control unit