relay ISUZU KB P190 2007 Workshop Repair Manual

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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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-365




Connector
Ter- No.

minal No.
B23
1 Power ground
2 Cruise main
3 Charge
4 Brake
5 ABS control unit
6 Fuel consumption
7 Tachometer pulse
8 Speedometer pulse
9 Rheostat
10 Taillight relay
11 -
12 -
13 Ambient temperature sensor
14 Seat belt
15 Key remind switch
16 Engine coolant temperature sensor
17 Fuel gauge unit and sender
18 Fuel level
19 Sedimenter
20 Door ajar
21 Power drive
22 3rd start
23 Fuel filter
24 Cruise set
25 Check trans
26 SVS
27 4W D
28 4W D - L
29 A/T oil temperature
30 Check 4W D
31 CAN (+)
32 CAN (-)
33 Turn signal - LH
34 ABS
35 Glow
36 -
37 Hi – beam (+)
38 Check engine
39 Oil pressure
40 SRS control unit

Connector
Ter- No.
minal No.
B24
1 Signal ground
2 SRS ground
3 A/T shift indicator “3”
4 A/T shift indicator “D”
5 A/T shift indicator “N”
6 A/T shift indicator “R”
7 A/T shift indicator “P”
8 Ignition
9 Ambient temperature sensor
10 RR fog light
11 FRT fog light
12 A/T shift indicator “2”
13 A/T shift indicator “L”
14 Turn signal - RH
15 Door SW - driver
16 Power source



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8A-366 ELECTRICAL-BODY AND CHASSIS


Connector No. B23 SOUTH
AFRICA SAUDI
ARABIA ISRAEL EUROPE OTHER
Terminal Connector place
4JJ1-TC HFV6 4JA1T(L) HFV6 4JJ1-TC HFV6 RHD LHD G.EXP
RHD 4JJ1-TC
C24SE
AUSTRALIAHFV6AUSTRALIA
1
Power ground
2 Cruise main
―
― ― ― ― ― ― ― ― ―
3
Charge
4 Brake
5 ABS control unit
6 Fuel consumption ―
―
―
―
―
7 Tachometer pulse
8 Speedometer pulse
9 Rheostat
10 Taillight relay
11 ―

― ― ― ― ― ― ― ― ― ― ― ―
12 ―

― ― ― ― ― ― ― ― ― ― ― ―
13 Ambient
temperature sensor ―

14 Seat belt
15 Key remind switch
16 Engine coolant
temperature sensor
17 Fuel gauge unit and
sender
18 Fuel level
― ― ― ― ― ― ― ― ― ― ― ―
19 Sedimenter ―
―
―
―
―
20 Door ajar
― ― ― ― ― ― ― ― ― ― ―
21 Power drive ―

22 3rd start ―

23 Fuel filter ―
―
―
―
―
24 Cruise set
― ―
―
―
―
―
25 Check trans ―

26 SVS ―

27 4W D ―

28 4W D - L ―

29 A/T oil temperature ―

30 Check 4W D ―

31 CAN (+)
― ― ―
―
―
― ― ―
32
CAN (-)
― ― ―
―
―
― ― ―
33
Turn signal - LH
34 ABS
35 Glow ―
―
―
―
―
36 ―

― ― ― ― ― ― ― ― ― ― ― ―
37 Hi – beam (+)
38 Check engine
39 Oil pressure
40 SRS control unit


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ELECTRICAL-BODY AND CHASSIS 8A-427

TROUBLESHOOTING
QUICK CHART FOR CHECK POINTS
Check Points



Trouble Mode Power
Window
& Door
Lock
Switch Power Window Switch
Power Window Motor

Driver’s
Side Passenger’s
Side RR-LH RR-
RH Driver’s
Side Passenger’s
Side RR-LH RR-
RH
All windows will not operate
Lock SW does not function Driver’s W indow:
W indow does not operate One-touch operation for
“DOW N” movement will not
operate


W indow operates in only
one direction

Front window on passenger
seat side:
W indow does not operate
W indow does not operate
when operating the driver’s
SW

W indow does not operate
when operating the
passenger’s SW

W indow does operate in
only one direction when
operating the driver’s SW

W indow does operate in
only one direction when
operating the passenger’s
seat side SW


Rear window on left (or right)
side:
W indow on left (or right)
side does not operate

W indow does not operate
when operating the driver’s
SW

W indow does operate in
only one direction when
operating the driver’s SW

W indow does operate in
only one direction when
operating the RR-LH (or
RH) side SW



Cable
Harness
Relay;
Power
Window


SBF9

C20

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8A-428 ELECTRICAL-BODY AND CHASSIS

1. All windows do not operate

Checkpoint Trouble Cause Countermeasure


Reinstall or replace the fuse
C20 (30A)

Poor fuse contact or blown

NG


Replace the circuit breaker
C20 (50A or 60A)

C20 (50A or 60A Fuse box)
function

Circuit breaker malfunction


Repair grounding points
contact

Grounding points C2


Poor grounding point contact

NG
NG
OK
OK
OK

Fuse C20 (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
C108
and 2
B8
Voltage between the power
window relay harness side
connector terminal 2
B8
and the ground (Should be
battery v oltage 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
B8
and 1
B56 and 6 D5

Open circuit or poor connector
contact

NG Voltage between 6 D5 and
the ground (Should be battery
v oltage present)

OK
Repair an open circuit or a
poor connection of the
connectors between 3
D5
and
C2 , or 3 B8 (12
C107 ) and C109

Open circuit or poor connector
contact

NG
Continued on the next page

Voltage between 3
D5 or 3
B8 and the ground



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8A-434 ELECTRICAL-BODY AND CHASSIS
INSPECTION AND REPAIR






B8
RTW 78ASH002901

Power Window Relay
Check continuity between the relay terminals.
2- 1........................ No continuity
(W hen battery voltage is applied between
3 and 4)
2- 1........................ Continuity





Harness side
D20 D5


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

Terminal No. Wire
color Connecting to Check item Connectin
g terminal Check condition Standard
6 G/R Power window
relay Voltage 6-Ground Starter SW “ON” Approx.
12V
7 BR/R Power window
8 BR/W motor

3 B Ground Continuity 3-Ground - Continuity






Harness side
D10


Front Passenger’s Power Window Switch
1. Harness Side Connector Circuit
Disconnect the switch connector, and check voltage and continuity between the harness side connector terminals as
shown in the following table.

Continuity
-
7-8
Continuity

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ELECTRICAL-BODY AND CHASSIS 8A-435
Terminal No. Wire
color Connecting to Check item Connectin
g terminal Check condition Standard
6 G/R Power window
relay Voltage 6-Ground Starter SW “ON” Approx.
12V
8 BR/R
7 BR/W Power window
motor Continuity 8-7
- Continuity
1,3 B Ground Continuity 1,3-Ground - Continuity






Harness side
D12 D16


Rear Power Window Switch-LH & RH
1. Harness Side Connector Circuit
Disconnect the switch connector, and check voltage and continuity between the harness side connector terminals as
shown in the following tables.


D12 (RR-LH)
Terminal No. Wire
color Connecting to Check item Connectin
g terminal Check condition Standard
6 G/R Power window
relay Voltage 6-Ground Starter SW “ON” Approx.
12V
8 BR/R
7 BR/W Power window
motor Continuity 8-7
- Continuity
3 B
4 B Ground Continuity 3,4-Ground - Continuity
D16 (RR-RH)
Terminal
No. Wire
color Connecting to Check item Connectin
g terminal Check condition Standard
6 G/R Power window
relay Voltage 6-Ground Starter SW “ON” Approx.
12V
8 BR/R
7 BR/W Power window
motor Continuity 8-7
- Continuity
3 B Ground Continuity 3-Ground - Continuity


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8A-486 ELECTRICAL-BODY AND CHASSIS
TROUBLE SHOOTING
Rear defogger inoperative
Checkpoint Trouble Cause Countermeasure


Reinstall or replace the fuse
No. C7 (10A) and 9
B56


Poor fuse contact or blown

NG


Reinstall or replace the fuse
C18 (20A)

C18 (20A, Fuse box)

Poor fuse contact or blown


Replace the rear defogger
switch

Rear defogger switch function

Switch malfunction

NG
NG
OK
OK
OK

Fuse No. C3 (10A, Fuse box)
and 9
B56


Replace the rear defogger
relay

Relay malfunction

NG
Continued on the next page

Rear defogger relay function


Repair grounding point contact

Grounding point
C2

Poor grounding point contact

NG
OK
Repair open circuit or poor
connector contact between
fuse No. C3 (10A) and 3

B7 , C18 (20A) and 1

B7 , 2 B7 (3 B55) and
1
L4 , 4 B7 (3 B54)
and 3
B46 or 1 B46 and

C2
Voltage between 1 L4 -
ground when the starter switch
and the rear defogger switch
are at on position (should be
battery voltage present)
Open circuit or poor connector
contact

NG
OK



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ELECTRICAL-BODY AND CHASSIS 8A-489
INSPECTION AND REPAIR





Switch side
B57


REAR DEFOGGER SWITCH
Rear Defogger Switch Connections
Terminal No.
SW position 9 7 8
ON
OFF







B7
RTW 78ASH002901

REAR DEFOGGER RELAY
Check continuity between the relay terminals.
2- 1........................ No continuity
(W hen battery voltage is applied between 4 and 3)
2- 1........................ Continuity


INSPECTION OF REAR DEFOGGER HEAT
WIRE
• Heat wires are printed on the inner side of glass.
To clean, use a soft cloth and wipe horizontally along the wires.
• Never use glass cleaner or equivalent.
• W hen measuring voltage, wind a piece of tin foil around the
tip of the negative probe and press the foil against the wire
with your finger as shown.



(1) Turn the ignition switch on.
(2) Turn the defogger switch on.
(3) Measure the voltage between the three points on the heat wire and the (-) terminal with a voltmeter.
(4) Check that the voltage becomes smaller from
A to B to C.



(5) If there is a place where the voltage suddenly changes to
0V, there is a broken wire between there and the powe
r
side.
(6) Move the tester probe from the position where the voltage changes to 0V toward the power side and find where the
voltage suddenly increases.


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