ISUZU TF SERIES 2004 Workshop Manual

ELECTRICAL-BODY AND CHASSIS 8A-203
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
C-36



Poor grounding point contact


Repair open circuit or
connector contact

Voltage between the
intermittent relay harness side
connector terminal 4
C-3
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
B-59 and 2 B-59
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

Wiper 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
terminals.
4.
B-59 and 5 B-59
5. Check to see if the wiper
motor rotates at a low
speed

Wiper motor malfunction
NG

Replace the wiper & washer
SW.

Wiper & washer SW. function

SW. malfunction
NG OK

8A-204 ELECTRICAL-BODY AND CHASSIS
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

Wiper motor function when
connecting the motor
connector 2
C-4 to the
battery (+) terminal, and 1
C-4 to the (-) terminal
(Should the wiper motor rotate
at a high speed)

Wiper motor malfunction
NG OK
Continuity between the wiper
& washer SW. connector
terminals 4
B-59 at the “HI”
position

Repair open circuit or
connector contact

Continuity between 4
B-59
and 2
C-4


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
OKContinuity in the wiper &
washer SW.
Replace the wiper motorWiper motor functionWiper motor malfunction NG

ELECTRICAL-BODY AND CHASSIS 8A-205
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
C-3 and the
wiper motor harness side
connector 6
C-4

Replace the intermittent relay

Relay malfunction
NG
Intermittent relay function

Wiper motor function
1. Disconnect the wiper motor
connector
2. Connect the motor
connector 5
B-59 to the
battery (+) terminal and 1
C-4 to the (-) terminal,
and then change the
connection of the battery (+)
terminal to the connector 4
C-4 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
C-4 and 1 C-4 in this
condition
Continuity between the wiper
& washer SW. connector
terminals 5
B-59 and 6 B-59
at the “OFF” position
OK

Replace the wiper motor

Wiper motor malfunction
NG
Repair an open circuit or a
poor connection of the
connectors between the fuse
No. RHD: C-9 (20A) and 4

C-4
Voltage between the wiper
motor harness side connector
terminal 4
C-4 and the
ground (Should be battery
voltage present)

Open circuit or poor connector
contact
NG
OK OK
OK

8A-206 ELECTRICAL-BODY AND CHASSIS
WASHER
1. Washer motor does not operate

Checkpoint Trouble Cause Countermeasure


Reinstall or replace the fuse
No. RHD: C-9 (20A)

Poor fuse contact or blown
NG
Repair or an open circuit or a
poor connection of the
connectors between 2
C-17
and 1
B-59

Open circuit or poor connector
contact
NG Voltage between the washer
motor harness side connector
terminal 2
C-17 and the
ground when the washer
button is depressed (Should
be battery voltage present)

Repair grounding point
C-36
contact


Poor grounding point contact
NG
Grounding point
C-36


Replace the washer motor

Motor malfunction
NG
Washer motor function when
connecting the motor side
connector 2
C-17 to the
battery (+) terminal, and the
connector 1
C-17 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
C-17
and
C-36
OK
Continuity between the wiper
& washer SW. side connector
terminals 1
B-59 and 7 B-59
when the washer button is
depressed

RHD:
Fuse No. C-9 (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. RHD: C-9 (20A) and 7

B-59
Voltage between the wiper &
washer SW. harness side
connector terminal 7
B-59
and the ground (Should be
battery voltage preset)

Open circuit or poor connector
contact
NG
OK OK OK

ELECTRICAL-BODY AND CHASSIS 8A-207
REMOVAL AND INSTALLATION


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





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

8A-208 ELECTRICAL-BODY AND CHASSIS
INSPECTION AND REPAIR





Switch side
B-59


Control Switch Connections

Terminal
No.
SW position 6 3 5 4 2 7 1
Mist
Off
INT

Lo
Hi
Wash



Wiper Motor Inspection
Connector



Low Speed Inspection
1. Clamp the wiper motor in a vise.
The moving parts must be clear of the vise.
2. Connect the connector terminals to the battery.
Refer to the illustration.
3. Check the wiper motor low speed operation.

ELECTRICAL-BODY AND CHASSIS 8A-209

High Speed Inspection
1. Clamp the wiper motor in a vise.
The moving parts must be clear of the vise.
2. Connect the connector terminals to the battery.
Refer to the illustration.
3. Check the wiper motor high speed operation.


Auto-Stop Inspection
1. Clamp the wiper motor in a vise.
The moving parts must be clear of the vise.
2. Connect the connector terminals to the battery.
Refer to the illustration.
3. Check the wiper motor low speed operation.
4. Disconnect the positive battery terminal.
This will stop the motor.



5. Connect the connector terminals No. 3 and No. 6 with a
lead wire.
Refer to the illustration.
6. Reconnect the positive battery terminal to connecto
r
terminal No. 4.
This will restart the motor.
Refer to the illustration.
7. Check the auto-stop operation.







Washer Motor Inspection
1. Fill the washer tank with washing solution.
2. Disconnect the motor connector.
3. Apply battery voltage to the washer motor connector.
4. Check the washer motor operation.

8A-210 ELECTRICAL-BODY AND CHASSIS
WIPER MOTOR AND LINKAGE
Removal



1. Disconnect the wiper arm nut cap
1 .





2. Remove the wiper arm nut
2.
3. Remove the wiper arm with blade.





4. Disconnect the wiper motor connector
3 .
5. Remove the wiper motor bracket screws

4 .




6. Disconnect the wiper motor from the wiper linkage at the
crank arm

5.


7. Remove the vent cowl cover
6.

Remove the 6 screw.

This illustration is based on RHD model

ELECTRICAL-BODY AND CHASSIS 8A-211


8. Remove the wiper linkage
7 from the access hole.






Installation
Follow the removal procedure in the reverse order to install the
wiper motor and linkage.
Pay close attention to the important points mentioned in the
following paragraphs.








Wiper Linkage
Take care not to scratch the painted surfaces of the body when
installing the wiper linkage to the body.
In case crank arm of wiper motor is removed, confirm the
position of auto stop prior to reinstall the crank arm to the wiper
motor.
Crank Arm Nut Torque Nm (kgm/lb ft
)
20  26 (2.0  2.6 / 14.5  18.8)

880R300006





Wiper Blade Position
Confirm the auto stop position of wiper motor prior to the
installation of the wiper blade and arm.
The distance between the vent cowl cover rubber seal

1 and
the wiper blade edge

2 is about 527.5 mm (2.050.3 in) 3
407.5 mm (1.570.3 in).




Wiper Arm Nut
Tighten the wiper arm nut to the specified torque.
Wiper Arm Nut Torque Nm (kgm/lb ft)
27  35 (2.75  3.57/19.94  25.85)


This illustration is based on RHD model

8A-212 ELECTRICAL-BODY AND CHASSIS
Windshield Washer Spray
Be sure that the engine hood is completely closed before
checking the windshield washer spray adjustment.
Windshield Washer Spray Position: Refer to the illustration.

RTW38DSF000201



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 riner.
3. Pull out the clip washer filler.
4. Remove the washer tank nuts.