fuse ISUZU TF SERIES 2004 Repair Manual

ELECTRICAL-BODY AND CHASSIS 8A-195
INSPECTION AND REPAIR




R-9 R-10
R-1 R-6



DOOR SWITCH
Door Switch Connections

Connector
SW No.
R-9 R-10
R-1 R-6
position Terminal No.
1 Body Ground
PUSHED
RELEASED





WARNING BUZZER
1. Warning Buzzer Circuit


Warning function Operational conditions
Taillights left on The buzzer sounds when both the tail relay and the FRT door switch-drive
side are turned on. To stop the sound of the buzzer, turn on the starter
switch.




Harness side
B-45


2. Warning Buzzer Harness Side Connector Circuit
Disconnect the warning buzzer connector and check
continuity and voltage between the warning buzzer harness
side connector terminals.

Terminal
NO. Wire
color Connecting to Check itemConnecting
terminal Check condition Standard
3 G/R Tail relay 3-Ground Lighting SW “ON” Approx. 12V
6 Y Fuse CB-5 Voltage
6-Ground Starter SW “ON” Approx. 12V

Door SW Open Continuity
(FRT-LH)
Continuity Close No continuity
2 B Ground 2-Ground - Continuity
FRT door-LH 1-Ground 1
B/W

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-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-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.

ELECTRICAL-BODY AND CHASSIS 8A-255
TROUBLESHOOTING
SPEEDOMETER
1. Speedometer and odometer do not function

Checkpoint Trouble Cause Countermeasure


Replace the vehicle speed
sensor

Vehicle speed sensor
malfunction
NG
Repair an open circuit in the
circuit or a poor connection at
the connectors
Continuity between the vehicle
speed sensor and the meter,
or the fuse RHD: C-5 (15A)
and the ground

Open circuit or poor connector
contact


Replace the case baseboard
assy

Use a meter tester to check
the speedometer function

Speedometer malfunction
NG NG OK
OK
Check the vehicle speed
sensor output
(4 pulses/1 rotation)




2. Speedometer pointer fluctuates
(May be wide fluctuation)

Replace the vehicle speed
sensor, or repair an open
circuit in the circuit or a
connectors Vehicle speed sensor
malfunction, or open circuit or
poor connector contact
NG

Replace the case baseboard
assy

Use a meter tester to check
the speedometer function

Speedometer malfunction
NG OK
Check the speed sensor
output by using the
oscilloscope

8A-302 ELECTRICAL-BODY AND CHASSIS
TROUBLESHOOTING
QUICK CHART FOR CHECK POINTS
Check Points
Fuse
C-14
(20A) Power
Window &
Door Lock
Switch Door
Lock
SwitchKey CYLN
Der switch Door Lock Actuator

Cable


Trouble Mode Driver’s
side Driver’s
side D/S P/S Passen
ger’s
side RR-RH RR-LHHarness
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

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

ELECTRICAL-BODY AND CHASSIS 8A-307
INSPECTION AND REPAIR








Harness side
D-20 D-5

Driver Seat Side Power Window & Door Lock
Switch
1. Harness Side Connector Circuit
Check voltage and continuity between the switch harness
side connector terminals as shown in the following table.


Terminal
No. Wire
color Connecting to Check itemConnectin
g terminalCheck condition Standard
Door lock SW
Driver seat Lock Continuity
(Lock) side door
Unlock No continuity
Door lock SW
Driver seat Lock No continuity
(Unlock) side door
Unlock Continuity
3 (D-5) L/R Ground
Continuity 3-Ground - Continuity

4 (D-5)
L/R Door lock
actuator (Lock) (Resistance)

4-5
- Continuity
There is some
resistance

5 (D-5)
L Door lock
actuator
(Unlock)
5-4
- Continuity
There is some
resistance
1 (D-5) LG/W Fuse
C-14 (20A) Voltage 1- Ground - Battery voltage
(Approx. 12V)
14-Ground L/R 14 (D-20)
13-Ground L/Y
13 (D-20)

ELECTRICAL-BODY AND CHASSIS 8A-317
DIESEL W/SRS MODEL
1. All windows do not operate

Checkpoint Trouble Cause Countermeasure


Reinstall or replace the fuse
SBF-11 (30A)

Poor fuse contact or blown
NG

Replace the circuit breaker
SBF-9 (50A)

SBF-9 (50A, Fuse box)
function

Circuit breaker malfunction


Repair grounding points
C-2
contact


Grounding points
C-2


Poor grounding point contact
NG NG OK
OK OK

Fuse SBF-11 (30A, Fuse box)


Replace the power window
relay

Power window relay
malfunction
NG
Repair an open circuit or a
poor connection of the
connectors between 1
C-108
and 2
B-8
Voltage between the power
window relay harness side
connector terminal 2
B-8
and the ground (Should be
battery voltage present)

Open circuit or poor connector
contact
NG OK

Power window relay function

OK
Repair an open circuit or a
poor connection of the
connectors between 1
B-8
and 1
B-56 and 6 D-5

Open circuit or poor connector
contact
NG Voltage between 6 D-5 and
the ground (Should be battery
voltage present)

OK
Repair an open circuit or a
poor connection of the
connectors between 3
D-5
and
C-2 , or 3 B-8 (12

C-107 )
and C-2

Open circuit or poor connector
contact
NG
Continued on the next page

Voltage between
C-2 and
the ground