battery ISUZU TF SERIES 2004 Repair Manual

8A-202 ELECTRICAL-BODY AND CHASSIS
TROUBLESHOOTING
WINDSHIELD WIPER
1. Wiper dose not operate at any switch position

Checkpoint Trouble Cause Countermeasure


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

Poor fuse contact or blown
NG

Repair open circuit or
connector contact

1. Wiper motor function when
connecting the motor
connector 3
C-4 to the
battery (+) terminal, and 1
C-4 to the (-) terminal
(Should the wiper motor
rotate at a low speed)
2. Wiper motor function when
connecting the motor
connector 2
C-4 to the
battery (+) terminal, 1
C-4
to the (-) terminal (Should
the wiper motor rotate at a
high speed)
Voltage between 3 B-59 and
the ground (Should be battery
voltage present)

Open circuit or poor connector
contact


Replace the wiper & washer
SW.

Continuity in the wiper &
washer SW.

SW. malfunction
NG NG OK
OK

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


Repair grounding point
C-2
contact


Grounding point
C-2


Poor grounding point contact
NG
OK OK

Replace the wiper motor

Wiper motor malfunction
NG

Repair open circuit or
connector contact

Continuity between 1
C-4
and
C-36


Open circuit or poor connector
contact
NG OK

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

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-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-280 ELECTRICAL-BODY AND CHASSIS


Vehicle Speed Sensor Inspection
1. Connect the vehicle speed sensor connector 1 E-44to the
battery (+) terminal and 2
E-44 to the (-) terminal.
2. Connect a resistance of 1.3K ohm to 5K ohm (1/4 W o
r
more) between connectors 1 E-44 and 3 E-44


CAUTION:
Be extremely careful not to connect the battery (+)
terminal to the connector 3
E-44.
This may damage the vehicle speed sensor.



3. Rotate the shaft of the vehicle speed sensor slowly and
measure the voltage at the both ends with a digital tester.

The voltage, with one rotation of shaft fluctuates four times in
the following range: 10 to 14V - 2V or less.

ELECTRICAL-BODY AND CHASSIS 8A-303
1. All the doors do not lock and unlock

Checkpoint Trouble Cause Countermeasure


Reinstall or replace the fuse
No. C-14 (20A)

Poor fuse contact or blown
NG

Repair grounding point
C-2
contact

Grounding point
C-2


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
D-5
and the ground (Should be
battery voltage present)

Open circuit or poor connector
contact
NG NG OK
OK OK

Fuse No. C-14 (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 4
D-4
and
C-2




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
D-20
and 6
D-20