relay ISUZU KB P190 2007 Workshop Repair Manual

ELECTRICAL-BODY AND CHASSIS 8A-27


RELAY AND FUSE BOX LOCATION (LHD)















RTW 78ALF000201

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8A-28 ELECTRICAL-BODY AND CHASSIS

RELAY LOCATION
RELAY & FUSE BOX (ENGINE ROOM)
RHD






NO. RELEY (C24SE) RELAY (HFV6) RELAY (4JA1T(L)) RELAY
(4JJ1-TC/4JK1-TC)
X1 RELAY; TAIL LIGHT RELAY; FOG LIGHT ← ←
X2 RELAY; FUEL PUMP RELAY; TAIL LIGHT
← ←
X3 RELAY; HORN
← ← ←
X4 RELAY; DIMMER
← ← ←
X5
  RELAY; GLOW
←
X6 RELAY; STARTER RELAY; H/LIGHT
← ←
X7 RELAY; H/LIGHT
(Except AUSTRALIA)
RELAY; COND FAN
(AUSTRALIA) RELAY; H/ LIGHT RELAY; CSD RELAY; STARTER CUT
X8
  RELAY; STARTER
←
X9 RELAY; FRT FOG
LAMP 
 RELAY; COND FAN
X10 RELAY; COND FAN
  RELAY;
TRANSMISSION
X11 RELAY; HEATER ← ← ←
X12 RELAY; STARTER CUT
(AUSTRALIA) RELAY; ECM MAIN
 RELAY; ECM MAIN
X13 RELAY; STARTER CUT
(Except AUSTRALIA)
RELAY; H/LIGHT
(AUSTRALIA) RELAY; F/PUMP RELAY; COND FAN RELAY; F/PUMP
X14 RELAY; A/C COMP
← RELAY; STARTER CUT RELAY; A/C COMP
X15 RELAY; THERMO RELAY; STARTER RELAY; THERMO
←




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ELECTRICAL-BODY AND CHASSIS 8A-29

RELAY LOCATION
RELAY & FUSE BOX (ENGINE ROOM)
LHD






NO. RELEY (C24SE) RELAY (HFV6) RELAY (4JH1-TC) RELAY (4JA1T(L)) RELAY
(4JJ1-TC/4JK1-TC)
X1 RELAY; TAIL LIGHT RELAY; FOG
LIGHT ←
← ←
X2 RELAY; FUEL
LIGHT RELAY; TAIL
LIGHT ←
← ←
X3 RELAY; HORN
← ← ← ←
X4 RELAY; DIMMER
← ← ← ←
X5
  RELAY; GLOW
← ←
X6 RELAY; STARTER RELAY; H/LIGHT
← ← ←
X7 RELAY; H/LIGHT
 RELAY; STARTER
CUT RELAY; CSD RELAY; STARTER
CUT
X8   RELAY; STARTER
← ←
X9 RELAY; FRT FOG
LIGHT 
RELAY; COND
FAN 
←
X10 RELAY; COND
FAN 
  RELAY;
TRANSMISSION
X11 RELAY; HEATER ← ← ← ←
X12
 RELAY; ECM MAIN RELAY; ECM MAIN
 ←
X13 RELAY; STARTER
CUT RELAY; F/PUMP
 RELAY; COND
FAN RELAY; F/PUMP
X14 RELAY; A/C COMP
← ← RELAY; STARTER
CUT RELAY; A/C COMP
X15 RELAY; THERMO RELAY; STARTER RELAY; THERMO RELAY; THERMO
←



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8A-30 ELECTRICAL-BODY AND CHASSIS
RELAY LOCATION

RELAY & FUSE BOX (CABIN)





RELAY
Connector No. B7 B8 B40
Relay name
REAR DEFOGGER POW ER W INDOW (NO RELAY)


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ELECTRICAL-BODY AND CHASSIS 8A-31
FUSE AND SLOW BLOW FUSE LOCATION
RELAY & FUSE BOX (ENGINE ROOM)
RHD


FUSE ∗1 AUSTRALIA
ENGINE MODEL
FUSE NO. C24SE
HFV6 4JA1T (L) 4JJ1-TC/ 4JK1-TC
EB1 15A ECM
← 10A ACG (S)
←
EB2
 15A 02 SENS PRE
 10A ECM (B)
EB3 15A FRT FOG 10A ECM (B)
 10A F/PUMP

20A TRAILER ∗1
EB4 10A ACG (S)
10A TCM PIM B
 10A ENGINE
EB5 10A ILLUMI
10A H/L (RH) HI
← ←

10A H/L (RH) HI ∗1
EB6 10A H/L (LH) HI
← ← ←
EB7 10A H/L (RH) LOW
← ← ←
EB8 10A H/L (LH) LOW
← ← ←
EB9 20A F/PUMP 20A TRAILER
 20A TRAIKER
EB10 10A SENSOR   20A COND, FAN
EB11 10A TAIL (RH)
← ← ←
EB12 10A ILLUMI & TAIL-LH
← ← ←
EB13 10A A/C
← ← ←
EB14 10A 4W D
← ← ←
EB15 10A HORN
← ← ←
EB16 10A HAZARD
← ← ←

SLOW BLOW FUSE
ENGINE MODEL
FUSE NO. C24SE
HFV6 4JA1T (L) 4JJ1-TC / 4JK1-TC
SBF1 100A MAIN ←

80A MAIN 120A MAIN
SBF2

20A FRT FOG
40A ABS1 ←

SBF3 
60A RAD. FAN
20A ABS2 ←

SBF4 20A COND, FAN 20A F/PUMP
20A COND, FAN 40A ECM
SBF5 40A IG 1
←
← ←
SBF6 

30A BLOW ER ←
←
SBF7 20A FRT FOG
40A ABS1 20A FRT FOG ←

SBF8 30A BLOW ER
20A ABS2 50A GLOW 60A GLOW
SBF9
50A IG 2
60A IG 2 50A IG 2 60A IG 2



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8A-32 ELECTRICAL-BODY AND CHASSIS
FUSE AND SLOW BLOW FUSE LOCATION
RELAY & FUSE BOX (ENGINE ROOM)
LHD

FUSE ∗2 W ITH HEADLIGHTS LEVELING
ENGINE MODEL
FUSE NO. C24SE HFV6 4JH1-TC 4JA1T (L) 4JJ1-TC / 4JK1-TC
EB1 15A ECM 15A ECM 10A ACG (S)
← ←
EB2
 15A 02 SENS PRE
  10A ECM (B)
EB3
 10A ECM (B)
  10A F/PUMP
EB4 10A ACG (S) 10A TCM PIM B 10A ECM
 10A ENGINE
EB5
10A H/L (RH) HI ∗2 10A H/L (RH) HI
10A H/L (RH) HI ∗2 10A H/L (RH) HI
←
EB6
10A H/L (LH) HI ∗2 10A H/L (LH) HI
10A H/L (LH) HI ∗2 10A H/L (LH) HI
←
EB7 10A H/L (RH) 10A H/L (RH) LOW 10A H/L (RH) 10A H/L (RH)
LOW ←

10A H/L (RH) LOW
∗ 2
10A H/L (RH) LOW
∗ 2
EB8 10A H/L (LH) 10A H/L (LH) LOW 10A H/L (LH)
10A H/L (LH)
LOW ←

10A H/L (LH) LOW
∗ 2
10A H/L (LH) LOW ∗2
EB9 20A F/PUMP
   20A TRAILER
EB10 10A SENSOR
 20A COND FAN
 20A COND FAN
EB11 10A TAIL (RH)
← ← ← ←
EB12 10A ILLUMI & TAIL
LH ←
← ← ←
EB13 10A A/C
← ← ← ←
EB14 10A 4W D
← ← ← ←
EB15 10A HORN
← ← ← ←
EB16 10A HAZARD
← ← ← ←
SLOW BLOW FUSE
ENGINE MODEL
FUSE NO. C24SE
HFV6 4JH1-TC 4JA1T (L) 4JJ1-TC / 4JK1-TC
SBF1 100A MAIN ←

80A MAIN ←
120A MAIN
SBF2 

20A FRT FOG 40A ABS1 
40A ABS1
SBF3 

60A RAD. FAN 30A ABS2 20A ABS2
←
SBF4 20A COND, FAN 20A F/PUMP 30A ECM 20A CON FAN 40A ECM
SBF5 40A IG 1
←
← ←
←
SBF6 

30A BLOW ER ←
←
←
SBF7 20A FRT FOG 40A ABS1 20A FRT FOG ←

←
SBF8 30A BLOW ER 20A ABS2 60A GLOW 50A GLOW 60A GLOW
SBF9 50A IG 2
60A IG 2 50A IG 2
← 60A IG 2


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8A-34 ELECTRICAL-BODY AND CHASSIS
DIODE LOCATION


RELAY & FUSE BOX







DIODE
C24SE HFV6 4JH1-TC4JA1T (L) 4JJ1-TC/4JK1-TC
No. RHD LHD RHD LHD LHD RHD LHD RHD LHD
X16 ― ― DIODE VSV FICD DIODE
X17 ― ― ― ― DIODE





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8A-110 ELECTRICAL-BODY AND CHASSIS
REMOVAL AND INSTALLATION

This illustration is based on RHD model
STARTER SWITCH
Removal
1. Steering Lock Assembly • Refer to Section 3B" STEERING COLUMN" for steering
lock assembly removal steps.
2. Starter Switch




Installation
Follow the removal procedure in the reverse order to install the
starter switch.


INSPECTION AND REPAIR

B62 B63
STARTER SWITCH
Switch Connections
Terminal No.

Starter
switch key
position B62
2
(B2) B62
4
(ACC) B62
1
(IG2) B63
1
(ST) B63
3
(B1) B62
3
(IG1)
Removed

OFF
ACC Inserted
ON
START
LOCK




RTW 78ASH003001

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



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8A-160 ELECTRICAL-BODY AND CHASSIS
TROUBLE SHOOTING
HEADLIGHT
1. Both the headlights (high and low beam) do not light

Checkpoint Trouble Cause Countermeasure


Repair the wiring

Poor ground point contact

NG


Repair open circuit or
connector contact


Repair open circuit


Repair or replace the
combination switch


Voltage between 1
B60 -
ground


Open circuit between lighting
relay and lighting switch

Open circuit between battery
positiv e terminal and lighting
relay

Combination switch continuity

Poor switch contact or sw
faulty

Voltage between
5
X6 - ground and
2
X6 - ground


Reinstall or replace the
lighting relay

Lighting relay

Poor relay contact or relay
faulty

NG
NG
NG
NG
OK
OK
OK
OK

Ground point contact (C2),
(C36)

Repair open circuit

W iring continuity between
B60 - C2


Open circuit

NG
OK



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ELECTRICAL-BODY AND CHASSIS 8A-161
2. High or low beam does not light on both headlights

Checkpoint Trouble Cause Countermeasure


Repair or replace the
combination switch

Dimmer ⋅passing switch
continuity

Poor switch contact or switch
faulty

NG

Repair open circuit or
connector contact
Voltage between
4
X4 - ground and
4
B60 - ground

Open circuit between
headlight and dimmer ⋅passing
switch

NG
OK



3. RH (or LH) high and low beam does not light



Replace the headlight bulb

Headlight connector continuity

Blown filament or air leakage

NG

Repair or replace the wire
and/or connector
W iring continuity between
connector 3
C19 - fuse No.
EB7 or 3
C26 fuse No.
EB8

Open circuit and/or poor
connector contact

NG
OK

Reinstall or replace fuse No.
EB7 or No. EB8
Fuse No. EB7 (10A) or
No. EB8 (10A) (Relay and
fuse box)
(No. EB7 RH, No. EB8: LH)
Poor installation or blown fuse

NG
OK



4. High or low beam does not light on one headlight (RH or LH)

Replace the headlight
assemblyHeadlight connector continuityBlown filament
NG
Repair open circuit or
connector contactW iring continuity between
headlight and dimmer ⋅passing
switchOpen circuit between
headlight and dimmer ⋅passing
switch
NG
OK



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