Isuzu engine 4j series. Manual — part 4

SERVICE INFORMATION 00 – 15

12. ENGINE ELECTRICAL PART TROUBLE

STARTER DOES NOT RUN

CHECK BATTERY

CHARGING FAILURE OR LIFE

CHECK BATTERY

CONNECTION FAILURE

CLEAN BATTERY TERMINALS, AND RECONNECT

TURN ON HEAD LAMP AND STARTER SWITCH

HEAD LAMP DOES NOT COME ON
OR IT IS EXTREMELY DARK

a) LACK OF BATTERY CHARGING
b) SHORT-CIRCUIT IN STARTER OIL
c) FAULTY STARTER PARTS

a) DISCONNECT STARTER CIRCUIT
b) DISCONNECT STARTER COIL
c) FAULTY STARTER SWITCH

BATTERY IS NORMAL

CHECK TERMINAL CONNECTION

CHECK STARTER OR STARTER SWITCH

TERMINAL CONNECTION IS NORMAL

FAILURE

REPAIR OR REPLACE

HEAD LAMP ILLUMINATES

00 – 16

SERVICE INFORMATION

FAULTY MESHING OF PINION AND RING GEAR

CHECK IF BATTERY VOLTAGE IS PRESENT AT
MAGNETIC SWITCH TERMINAL “S” WHEN
STARTER SWITCH IS TURNED TO “START (ST)”

YES

EXTREME WEAR OF
PINION AND RING
GEAR

REPAIR OR REPLACE
STARTER, REPLACE
RING GEAR

OR

NO

UNDER THIS CONDITION, CHECK IF VOLTAGE
OF CONNECTOR 3BW ON MAGNETIC SWITCH
OF RESTART RELAY IS NORMAL

YES

NO

DISCONNECTION OR
FAULTY CONNECTION
BETWEEN STARTER
SWITCH AND MAGNETIC
SWITCH

CHECK IF VOLTAGE IS
PRESENT AT WIRING
CONNECTOR 3BW ON
STARTER SWITCH OF
RESTART RELAY

STARTER SLIDING
RESISTANCE IS
LARGE

REPAIR OR REPLACE
STARTER

FAULTY CONNECTION OF
STARTER SWITCH

DISCONNECTION OR
FAULTY CONNECTION
BETWEEN STARTER
SWITCH AND BATTERY

REPLACE STARTER
SWITCH

REPAIR

YES

NO

REPAIR

SERVICE INFORMATION 00 – 17

MAGNETIC SWITCH DOES NOT OPERATE THOUGH
STARTER SWITCH IS TURNED TO “START (ST)”

CHECK IF VOLTAGE IS PRESENT AT MAGNETIC
SWITCH TERMINAL “S” WHEN STARTER SWITCH IS
TURNED TO “START (ST)”

YES

NO

CHECK GROUND CABLE

YES

YES

YES

NO

REPAIR

OR

PINION
SLIDING
PART DOES
NOT MOVE

MAGNETIC SWITCH
OR COIL IS
DISCONNECTED OR
BURNED OUT

REPAIR OR REPLACE STARTER

CHECK IF INDICATOR LAMP ON
METER COMES ON NORMALLY

YES

NO

DISCONNECTION OR
FAULTY CONNECTION
BETWEEN BATTERY
AND STARTER SWITCH

CHECK CONTINUITY
STARTER SWITCH AND
MAGNETIC SWITCH
TERMINAL “S”

CHECK STARTER
RELAY

FAULTY CONNECTION
OR STARTER SWITCH

REPAIR

CHECK CLUTCH
START

REPLACE STARTER
SWITCH

00 – 18

SERVICE INFORMATION

PINION MESHES WITH RING GEAR BUT
ENGINE DOES NOT RUN

CHECK GROUND CABLE

YES

NO

REPAIR OR REPLACE
GROUND CABLE

FAULTY CONNECTION
OF BRUSH AND
COMMUTATOR

BURNED-OUT
MAGNETIC
STARTER SWITCH

REPAIR OR REPLACE STARTER

DISCONNECTION
OR DAMAGE OF
FIELD COIL

DISCONNECTION
OR DAMAGED OF
ARMATURE COIL

SLIP OF
PINION
CLUTCH