Circuit ISUZU KB P190 2007 Workshop Repair Manual

8A-270 ELECTRICAL-BODY AND CHASSIS

CIRCUIT DIAGRAM HFV6


RTW 78AXF002201


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ELECTRICAL-BODY AND CHASSIS 8A-271

CIRCUIT DIAGRAM 4JJ1-TC/4JK1-TC, 4JH1-TC


RTW 78AXF027201


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8A-272 ELECTRICAL-BODY AND CHASSIS

CIRCUIT DIAGRAM 4JA1T (L)


RTW 78AXF005701


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ELECTRICAL-BODY AND CHASSIS 8A-273
TROUBLESHOOTING
WINDSHIELD WIPER
1. Wiper dose not operate at any switch position

Checkpoint Trouble Cause Countermeasure


Reinstall or replace the fuse
No. C9 (20A)

Poor fuse contact or blown

NG

Repair open circuit or
connector contact

1. W iper motor function when
connecting the motor
connector 3
C4 to the
battery (+) terminal, and 1
C4 to the (-) terminal
(Should the wiper motor
rotate at a low speed)
2. W iper motor function when connecting the motor
connector 2
C4 to the
battery (+) terminal, 1
C4 to the (-) terminal
(Should the wiper motor
rotate at a high speed)
Voltage between 3 B59 and
the ground (Should be battery
v oltage present)

Open circuit or poor connector
contact


Replace the wiper & washer
SW .

Continuity in the wiper &
washer SW .

SW . malfunction

NG
NG
OK
OK

Fuse No. C9 (20A)


Repair grounding point
contact
Grounding point
C2 (LHD),
C
C36 (RHD)


Poor grounding point contact

NG
OK
OK

Replace the wiper motor

W iper motor malfunction

NG

Repair open circuit or
connector contact

Continuity between 1
C4
and
C36 (RHD), C2 (LHD)


Open circuit or poor connector
contact

NG
OK



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8A-274 ELECTRICAL-BODY AND CHASSIS
2. Wiper dose not operate at “ INT “ position

Checkpoint Trouble Cause Countermeasure


Replace the wiper & washer
SW .

SW . malfunction

NG


Repair grounding point contact

Grounding point
C36 (RHD),

C2 (LHD)


Poor grounding point contact


Repair open circuit or
connector contact

Voltage between the
intermittent relay harness side
connector terminal 4
C3
and the ground at the “INT”
position (Should be battery
voltage present)

Open circuit or poor connector
contact

NG
NG
OK
OK
Continuity between the wiper
& washer SW connector
terminals 4
B59 and 2 B59
at the “ INT “ position

Replace the intermittent relay

Intermittent relay function

Relay malfunction

NG
OK



3. Wiper does not operate at “LO” position



Replace the wiper motor

W iper motor function
1. Disconnect the wiper & washer SW . connector
2. Turn the starter SW . on
3. Short-circuit between the wiper & washer SW .
harness side connector terminal 3
B59 and
5
B59 .
4. Check to see if the wiper
motor rotates at a low
speed

W iper motor malfunction

NG

Replace the wiper & washer
SW .

W iper & washer SW . function

SW . malfunction

NG
OK


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ELECTRICAL-BODY AND CHASSIS 8A-275
4. Wiper does not operate at “HI” position

Checkpoint Trouble Cause Countermeasure


Repair open circuit or
connector contact

Open circuit or poor connector
contact

NG


Replace the wiper motor

W iper motor function when
connecting the motor
connector 2
C4 to the
battery (+) terminal, and 1
C4 to the (-) terminal
(Should the wiper motor rotate
at a high speed)

W iper motor malfunction

NG
OK
Continuity between the wiper
& washer SW . connector
terminals 4
B59 at the “HI”
position

Repair open circuit or
connector contact

Continuity between 4
B59
and 2
C4


Open circuit or poor connector
contact

NG
OK



5. Rotation of the wiper motor does not stop


Replace the wiper & washer
SW .

SW . malfunction

NG

OK
Continuity in the wiper &
washer SW .


Replace the wiper motor

W iper motor function

W iper motor malfunction

NG



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8A-276 ELECTRICAL-BODY AND CHASSIS
6. Auto-stop function of the wiper motor does not operate

Checkpoint Trouble Cause Countermeasure


Repair open circuit or
connector contact

Open circuit or poor connector
contact

NG

Repair open circuit or
connector contact

Open circuit or poor connector
contact

NG Continuity between the
intermittent relay harness side
connector 6
C3 and the
wiper motor harness side
connector 6
C4

Replace the intermittent relay

Relay malfunction

NG
Intermittent relay function


W iper motor function
1. Disconnect the wiper motor connector
2. Connect the motor connector 5
B59 to the
battery (+) terminal and
1
C4 to the (-) terminal,
and then change the
connection of the battery (+)
terminal to the connector
4
C4 while the motor
rotating at a low speed
3. Check to see if the wiper motor stops at the auto stop
position when connecting
the connector terminals
3
C4 and 1 C4 in this
condition
Continuity between the wiper
& washer SW . connector
terminals 5
B59 and 6 B59
at the “OFF” position
OK

Replace the wiper motor

W iper motor malfunction

NG
Repair an open circuit or a
poor connection of the
connectors between the fuse
No. C9 (20A) and 4
C4
Voltage between the wiper
motor harness side connector
terminal 4
C4 and the
ground (Should be battery
v oltage present)

Open circuit or poor connector
contact

NG
OK
OK
OK



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ELECTRICAL-BODY AND CHASSIS 8A-277
WASHER
1. Washer motor does not operate

Checkpoint Trouble Cause Countermeasure


Reinstall or replace the fuse
No. C9 (20A)

Poor fuse contact or blown

NG
Repair or an open circuit or a
poor connection of the
connectors between 2
C17
and 1
B59

Open circuit or poor connector
contact

NG Voltage between the washer
motor harness side connector
terminal 2
C17 and the
ground when the washer
button is depressed (Should
be battery v oltage present)

Repair grounding point
C36
contact

Poor grounding point contact

NG
Grounding point
C36


Replace the washer motor

Motor malfunction

NG
W asher motor function when
connecting the motor side
connector 2
C17 to the
battery (+) terminal, and the
connector 1
C17 to the (-)
terminal (Should the washer
motor rotate) OK

Repair open circuit or
connector contact

Open circuit or poor connector
contact

NG
Continuity between 1
C17
and
C36
OK

Continuity between the wiper
& washer SW . side connector
terminals 1
B59 and 7 B59
when the washer button is
depressed

Fuse No. C9 (20A)

OK

Replace the wiper & washer
SW .

SW . malfunction

NG
Repair or an open circuit or a
poor connection of the
connectors between the fuse
No. C-9 (20A) and 7
B59
Voltage between the wiper &
washer SW . harness side
connector terminal 7
B59
and the ground (Should be
battery v oltage preset)

Open circuit or poor connector
contact

NG
OK
OK
OK


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8A-278 ELECTRICAL-BODY AND CHASSIS
REMOVAL AND INSTALLATION


WIPER AND WASHER SWITCH
Removal
Refer to the removal steps of the LIGHTING SW ITCH
(COMBINATION SW ITCH) in “ LIGHTING “ of this section.





Installation
Follow the removal procedure in the reverse order to install the
wiper and washer switch.




RTW 780SH001601
This illustration is based on RHD model
Pay close attention to the important points mentioned in the
following paragraphs.

Connector
Be absolutely sure that the wiper and washer switch connector
is securely connected.
This will prevent a poor contact and an open circuit.



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ELECTRICAL-BODY AND CHASSIS 8A-283
Windshield Washer Spray
Be sure that the engine hood is completely closed before
checking the windshield washer spray adjustment.
W indshield W asher Spray Position: Refer to the illustration.

RTW 38DSF000201



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



Note:
Windshield wiper arm and blade assembly configurations
are different for the right-hand and left-hand side of the
vehicle.
Be careful not to confuse the right-hand and left-hand side
assemblies.



This illustration is based on RHD model
WASHER TANK MOTOR
Removal
1. Remove the head light.
• Refer to the head light in this manual.
2. Remove the inner liner.
3. Pull out the clip washer filler.
4. Remove the washer tank nuts.


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