Circuit ISUZU KB P190 2007 Workshop Repair Manual

8A-352 ELECTRICAL-BODY AND CHASSIS
2. When the parking brake lever is released, 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 parking
brake SW . faulty

NG
Thermo unit malfunction
Replace the brake fluid level
SW ., or repair a short circuit
between the parking brake
SW . connector 1
C39,
1
R4 and 4 B23 (C24SE :
9
B23 ) or the brake fluid
level SW . connector 2
C37
and 4
B23 (C24SE : 9

B23 )
Check to see if the indicator
light goes off when the parking
brake SW . connector 1
C39
(stick type), 1
R4 (lever
type) is disconnected
Brake fluid level 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
Check to see the warning light
goes off when the oil pressure
SW . connector
1
E1 is disconnected or
when the PIM (Oil pressure)
connector 6
B96 (HFV6) is
disconnected
Repair a short circuit between
1
E1 and 39 B23
(C24SE : 17
B24) or 6
B96 and 39 B23 (HFV6)

Short circuit

NG
OK

Replace the oil pressure SW .

Continuity between the oil
pressure SW . connector
1
E1 (HFV6 : 6 B96 )and
the body ground when the
engine is operating

Oil pressure SW . faulty

NG
OK

Engine oil pressure





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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-355



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


Rubber Seal
Be absolutely sure that the fuel gauge unit rubber seal is
correctly seated.



Connector
Be absolutely sure that the fuel gauge unit connector is
securely connected.
This will prevent a poor contact and an open circuit.



VEHICLE SPEED SENSOR (INSTALLED
ON THE TRANSMISSION)
Removal
1. Disconnect the connector.
2. Remove the vehicle speed sensor body by rotating it.







Installation
To Install, follow the removal steps in the reverse order, noting
the following point.
Tighten the vehicle speed sensor to the specified torque.
Vehicle Speed Sensor Tightening Torque N ⋅m (kg ⋅m/lb.ft)
25 ± 4.9 (2.5 ± 0.5/18 ± 3.6)



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8A-368 ELECTRICAL-BODY AND CHASSIS
140R300007
Thermo Unit Inspection
INSPECTION
Use a circuit tester to measure the thermo unit resistance.
Replace the unit when the result of inspection is found
abnormal.

Temperature
Check
condition 60
°C
(140 °F) 115
°C
(239 °F)
Resistance
value ( Ω)
168
±3.5 +2.5
30.9 –2.0
041R300002


Fuel Gauge Unit Inspection
Measure the fuel gauge unit resistance between the connector
terminals 2
F2 and 3 F2 while shifting the float from “E”
to “F” point.
Fuel Tank Resistance
Level Float position
mm Standard resistance
Ω
F (B) 217.5 +2.2
17 –0.8
106.6
(4JJ1-TC/4JK1-TC)
105.1
(C24SE, 4JA1T(L)) 1/2 (A)
112.8
(4JH1-TC) 45
± 4.5
E (C) 16.2 120
± 2.0


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ELECTRICAL-BODY AND CHASSIS 8A-369
Low Fuel Indicator Light
1. Disconnect the fuel gauge 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



RTW 78ASH001501




Check level sensor operation
1. Remove the fuel gauge 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.

RTW 48AMH000101


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.

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ELECTRICAL-BODY AND CHASSIS 8A-377

CIRCUIT DIAGRAM C24SE COOLER WITHOUT HEATER


RTW 680XF012401

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8A-378 ELECTRICAL-BODY AND CHASSIS

CIRCUIT DIAGRAM C24SE A/C WITH HEATER


RTW 780XF013701

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ELECTRICAL-BODY AND CHASSIS 8A-379

CIRCUIT DIAGRAM HFV6 (RHD)


RTW 78AXF003601

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8A-380 ELECTRICAL-BODY AND CHASSIS

CIRCUIT DIAGRAM 4JJ1-TC / 4JK1-TC (RHD)


RTW 78AXF012101


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ELECTRICAL-BODY AND CHASSIS 8A-381

CIRCUIT DIAGRAM 4JA1T (L) A/C WITH HEATER Sheet 1/2


RTW 78AXF008201

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