D439E Service Manual 3. Engine Electrical System (D439E)
130
Starter
Troubles Possible causes Corrective action
Battery voltage is low Charge or replace the battery
Battery cable is loose corroded or worn Repair or replace the cable
Fusible link is short Replace the fusible link
Starter is defective Replace the starter
Engine does not crank
Ignition switch is defective Replace the Ignition switch
Battery voltage is low Charge or replace tile battery
Battery cable is loose corroded or worn Repair or replace the cable
Cranking is slow
Starter is defective Replace the starter
Starter is defective Replace the starter
Starter keeps rotating
Ignition switch is defective Replace the ignition switch
Wiring is short Repair or replace the wire
Pinion gear teeth are worn or damaged or
motor is defective
Replace the starter
Starter motor operates
but engine does not
crank
Ring gear teeth are worn 01 damaged
Replace the flywheel gear or
torque converter
Pre-Heater
Troubles Possible causes Corrective action
Engine does not start when the
coolant temperature is below 0℃
Wiring connection is loose or
wiring is defective
Coolant sensor is defective
Pre-heater plug is defective
Pre-heater control unit is defective
Repair the Wiring or tighten the
connection
Replace the coolant temperature
sensor
Replace the pre-heater plug
Replace the unit
If engine stops after 1st
explosion or Idle is unstable
when the coolant temperature is
below 0℃
Connection is loose or wiring is
defective
Pre-heating plug is defective
Pre-heating plug relay is defective
Correct or tighten the wiring or
connection
Replace tile pre-heater plug
Replace the relay
Pre-heating indicator remains off
Lamp is short
Connection is loose or wiring is
cracked
Wiring is short
Pre-heater control unit is defective
Replace the lamp
Replace tile wiring or tighten the
connection
Replace tile wiring
Replace the unit
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