2007 ISUZU KB P190 Harness

8A-346 ELECTRICAL-BODY AND CHASSIS
TEMPERATURE GAUGE AND THERMO UNIT (4JA1T(L), 4JH1-TC, C24SE)
1. No temperature indicates at all

Checkpoint Trouble Cause Countermeasure


Replace the thermo unit

Thermo unit malfunction

NG


Replace the case baseboard
assy

Gauge function
1. Disconnect the unit connector then connect
3.4W bulb to wire harness
side with ground
2. Check indicating point when starter SW . is ON
position (Temperature
should indicate)

Gauge malfunction


Repair open circuit or
connector contact
Continuity between 1 E19
(C24SE : 1
E65 ) and 16
B23 (C24SE : 13 B24 )


Open circuit or poor connector
contact

NG
NG
OK
OK
Thermo unit continuity
between connector 1
E19
(C24SE : 1
E65 ) and the
ground



2. Temperature gauge incorrect readings in all ranges


Replace the thermo unit

Thermo unit malfunction

NG

Thermo unit resistance
between connector 1
E19
(C24SE: 1
E65 ) and the
ground when disconnecting
the connector (Specified
resistance should indicate)



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ELECTRICAL-BODY AND CHASSIS 8A-347
ENGINE COOLANT TEMPERATURE GAUGE (4JJ1-TC/4JK1-TC)
Refer to “Inspection and Repair” in this Manual for a detailed description of the coolant temperature gauge self-
diagnosis procedure.

1. No engine coolant temperature indicates at all

Checkpoint Trouble Cause Countermeasure


Replace the engine coolant
temperature sensor

Engine coolant temperature
sensor malfunction

NG


Replace the meter assembly

Gauge function
1. Disconnect the sensor connector then connect
3.4W bulb to wire harness
side with ground
2. Check indicating point when starter SW . is ON
position (Temperature
should indicate)

Gauge malfunction


Repair open circuit or
connector contact

Continuity between 3
E41
and 16
B23


Open circuit or poor connector
contact

NG
NG
OK
OK
Engine coolant temperature
sensor continuity between
connector 3
E41 and the
ground



2. Engine coolant temperature gauge incorrect readings in all ranges


Replace the sensor

The sensor malfunction

NG

Engine coolant temperature
sensor resistance between
connector 3
E41 and the
ground when disconnecting
the connector (Specified
resistance should indicate)


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8A-348 ELECTRICAL-BODY AND CHASSIS
TEMPERATURE GAUGE AND THERMO UNIT (HFV6)
1. No temperature indicates at all

Checkpoint Trouble Cause Countermeasure


Replace the thermo unit

Thermo unit malfunction

NG


Replace the case baseboard
assy

Gauge function
1. Disconnect the unit connector then connect
3.4W bulb to wire harness
side with ground
2. Check indicating point when starter SW . is ON
position (Temperature
should indicate)

Gauge malfunction


Repair open circuit or
connector contact

Continuity between 8 B96
and 16
B23


Open circuit or poor connector
contact

NG
NG
OK
OK
PIM (Thermo unit) continuity
between connector 8
B96
and the ground




2. Temperature gauge incorrect readings in all ranges


Replace the thermo unit

Thermo unit malfunction

NG
PIM (Thermo unit) resistance
between connector 8
B96
and the ground when
disconnecting the connector
(Specified resistance should
indicate)




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ELECTRICAL-BODY AND CHASSIS 8A-349
FUEL GAUGE AND FUEL TANK UNIT (C24SE, 4JJA1T(L), 4JH1-TC, 4JJ1-TC/4JK1-TC)
1. No fuel level indicates at all

Checkpoint Trouble Cause Countermeasure


Replace the tank unit

Open circuit inside the tank
unit

NG
Thermo unit malfunction

Replace the case baseboard
assy

Fuel gauge function
1. Disconnect the tank unit connector then connect
3.4W bulb to wire harness
side
2. Check indicating point when starter SW . is ON
position (Fuel level should
indicate)

Gauge malfunction


Repair open circuit or
connector contact
Continuity between
connectors 17
B23 (C24SE :
14
B24 ) and 3
F2


Open circuit or poor connector
contact

NG
NG
OK
OK

Tank unit continuity between
connector 3
F2 and ground




2. Fuel gauge gives incorrect readings in all ranges

Replace the tank unitTank unit malfunction
NG
Tank unit resistance position
with the float at checking
points (Specified resistance
should indicate)


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8A-350 ELECTRICAL-BODY AND CHASSIS
FUEL GAUGE AND FUEL TANK UNIT (HFV6)
1. No fuel level indicates at all

Checkpoint Trouble Cause Countermeasure


Replace the tank unit

Open circuit inside the tank
unit

NG
Thermo unit malfunction

Replace the case baseboard
assy

Fuel gauge function
1. Disconnect the tank unit connector then connect
3.4W bulb to wire harness
side
2. Check indicating point when starter SW . is ON
position (Fuel level should
indicate)

Gauge malfunction


Repair open circuit or
connector contact
Continuity between
connectors 17
B23 and 17

B96

Open circuit or poor connector
contact

NG
NG
OK
OK
PIM (Tank unit) continuity
between connector 17
B96
and ground



2. Fuel gauge gives incorrect readings in all ranges

Replace the tank unitTank unit malfunction
NG
Tank unit resistance position
with the float at checking
points (Specified resistance
should indicate)



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ELECTRICAL-BODY AND CHASSIS 8A-353
REMOVAL AND INSTALLATION



RTW 780SH001701
This illustration is based on RHD model
METER ASSEMBLY
Removal
1. Meter Cluster Assembly
• Refer to the removal steps of “INSTRUMENT PANEL” in
Section 10 “CAB”
2. Meter Assembly • Remove three screws of the meter assembly.
• Disconnect the meter connectors.






Installation
Follow the removal procedure in the reverse order to install the
meter.
Pay close attention to the important points mentioned in the
following paragraphs.



Connector
Be absolutely sure that the meter connectors are securely
connected.
This will prevent a poor contact and an open circuit.



Wire Harness
Do not pinch the wire harness between the cluster and the
meter hood during the meter assembly installation procedure.
W ire damage will result.




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ELECTRICAL-BODY AND CHASSIS 8A-407
TROUBLESHOOTING
QUICK CHART FOR CHECK POINTS
Check Points Fuse C21
(20A) Power
Window &
Door Lock Switch Door
Lock
Switch Key Cylinder
switch Door Lock Actuator

Cable


Trouble Mode Driver’s
side Driver’s
side D/S P/S Passen
ger’s side RR-RH RR-LH
Harness
1. All the doors do not
lock and unlock
2. All the doors do not get locked (or
unlocked)

3. Driver’s side door
does not get locked
(or unlocked)

4. FRT passenger’s side
door does not get
locked (or unlocked)

5. RR door-RH does not
get locked (or
unlocked)

6. RR door-LH does not
get locked (or
unlocked)

7. Door lock does not
operate when
operating from the
driver’s seat side


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8A-408 ELECTRICAL-BODY AND CHASSIS
1. All the doors do not lock and unlock

Checkpoint Trouble Cause Countermeasure


Reinstall or replace the fuse
No. C21 (20A)

Poor fuse contact or blown

NG


Repair grounding point contact

Grounding point C2


Poor grounding point contact


Repair open circuit or
connector contact
Voltage between the driver’s
side power window & door
lock SW harness side
connector terminal 1
D5
and the ground (Should be
battery voltage present)

Open circuit or poor connector
contact

NG
NG
OK
OK
OK

Fuse No. C21 (20A, Fuse box)


Repair open circuit or
connector contact

Open circuit or poor connector
contact

NG
Replace the driver’s side
power window & door lock
SW .
Driver’s side power window &
door lock SW . function

SW . malfunction

NG
OK
Continuity between 3 or 4

D4 or 2 D24 and
C2




2. All the doors do not get locked (or unlocked)


Repair open circuit or
connector contact

Open circuit or poor connector
contact

NG

Replace the driver’s side
power window & door lock
SW .
Driver’s side power window &
door lock SW . function

SW . malfunction

NG
OK
Continuity between the driver’s
side power window & door
lock SW harness side
connector terminals 14
D20
and 6
D20


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