Opel Frontera UBS. Manual - part 370

SERVICE INFORMATION 00 – 3

1.

HARD STARTING

Checkpoint

Possible cause

Correction

Battery

Loose battery cable terminal
Poor connections due to rusting

Clean and/or retighten the battery
cable terminal

1.  STARTER MOTOR INOPERATIVE

Battery discharged or weak

Recharge or replace the battery

Fan belt loose or broken

Adjust or replace the fan belt

Fusible link

Fusible link shorted

Replace the fusible link

Starter switch

Defective starter switch or starter relay

Replace the starter switch or the
starter relay

Starter motor

Defective magnetic switch or starter relay

Repair or replace the magnetic
switch

Defective starter motor

Repair or replace the starter motor

2.  STARTER MOTOR OPERATES BUT ENGINE DOES NOT TURN OVER

Battery

Loose battery cable terminal
Poor connections due to rusting

Clean and/or retighten the battery
cable terminal

Battery discharged or weak

Recharge or replace the battery

Fan belt loose or broken

Adjust or replace the fan belt

Starter motor

Defective pinion gear

Replace the pinion gear

Defective magnetic switch

Repair or replace the magnetic
switch

Brush wear, Weak brush spring

Replace the brush and/or the brush
spring

Engine

Piston, crank bearing seizuer, or other
damage

Repair or replace the related parrts

00 – 4 SERVICE INFORMATION

Checkpoint

Possible cause

Correction

Engine stop
mechanism

Defective fuel cut solenoid valve

Replace the fuel cut solenoid valve

3.  ENGINE TURNS OVER BUT DOES NOT START

     FUEL IS NOT BEING DELIVERED TO THE INJECTION PUMP

Fuel

Fuel tank is empty

Fill the fuel tank

Fuel piping

Clogged or damaged fuel lines.  Loose fuel
line connection

Repair or replace the fuel lines
Retighten the fuel line connection

Fuel filter

Fuel filter overflow valve does not close

Repair or replace the fuel filter
overflow valve

Clogged fuel filter element

Replace the fuel filter element or 
the filter cartridge

Fuel system

Air in the fuel system

Bleed the air from the fuel system

Fuel feed pump

Defective feed pump

Repair or replace the feed pump

     FUEL IS BEING DELIVERED TO THE INJECTION PUMP

Fuel

Use of the wrong fuel

Use the correct fuel

Water particles in the fuel

Carge the fuel

Fuel system

Air in the injection pump

Bleed the air from the fuel system

Injection nozzle

Injection nozzle sticking

Replace the injection nozzle

Injection nozzle injection starting pressure
too low 
Improper spray condition

Adjust or replace the injection
nozzle

Injection pump

Defective fuel injection nozzle resulting in
the fuel drippage after fuel injection

Replace the delivery valve

Defective injection pump control rack
operation

Repair or replace the injection pump
control rack

Injection pump plunger worn or stuck

Replace the injection pump plunger
assembley

Injection pump drive shaft seizure or other
damage

Replace the injection drive shaft

Injection pump governor spring seizure

Replace the injection pump
governor spring

SERVICE INFORMATION 00 – 5

Idling improperly adjusted

Adjust the idling

Idling system

Checkpoint

Possible cause

Correction

Defective fast idling speed control device

Repair or replace the fast idling
speed control device

Fast idling speed
control device

Accelerator control system improperly
adjusted

Adjust the accelerator control
system

Accelerator control
system

2.

UNSTABLE IDLING

4.  QUICK-ON START SYSTEM (QOS III)

PREPARATION
1.  Disconnect the thermoswitch connector.
2.  Determine whether or not the glow plugs are receiving power.
     a)  Make sure that the starter switch is "OFF"
     b)  Connect a voltmeter between one of the glow plugs and the cylinder wall.
     c)  Move the starter switch to the "ON" position.
          The voltmeter needle will show the souse voltage (12V) if the glow plugs are receiving power.
          If the voltmeter needle does not move, the glow plugs are not receiving power.
3.  Perform the troubleshooting procedure.

1.
2.
3.

Replace the fusible link wire
Replace the indicator light fuse
Replace the indicator light bulb

Glow plug indicator
light does not turn 
on.

Defective Fusible link wire
Broken indicator light fuse
Defective indicator light bulb

1.
2.

3.

4.

Replace the fusible link wire
Replace or Repair glow plug relay
connector
Replace or Repair glow plug
connector
Replace or Repair quick-on start
timer connector

Preheating system
does not work

Defective Fusible link wire shorted
Defective glow plug relay connector

Defective glow plug connector

Defective quick-on start timer connector

1.

2.
3.

Replace thermo sensor or repair 
wiring harness.
Replace glow plug
Replace timer unit

Preheating time to 
long or to short

Defective thermo sensor include 
defective wiring harness
Defective glow plug
Defective timer unit

00 – 6 SERVICE INFORMATION

Checkpoint

Possible cause

Correction

Injection timing improperly adjusted

Adjust the injection timing

Insufficient injection volume

Adjust the injection volume

Defective idle spring

Replace the idle spring

Defective governor lever operation

Repair or replace the governor
lever

Regulator valve improperly adjustment

Adjust or replace the regulator valve

Broken plunger spring

Replace the plunger spring

Worn plunger

Replace the plunger assembly

Worn cam disc

Replace the cam disc

Valve clearance improperly adjusted

Adjust the valve clearance

Valve clearance

Blown out cylinder head gasket.  Worn
cylinder liner. 
Piston ring sticking between
the valve and the valve seat

Replace the related parts

Compression
pressure

Fuel system leakage or blockage

Repair or replace the fuel system

Fuel system

Air in the fuel system

Bleed the air from the fuel system

Water particles in the fuel system

Change the fuel

Clogged fuel filter element

Replace the fuel filter element or
the fuel filter cartridge

Fuel filter

Defective fuel feed pump

Repair or replace the fuel feed pump

Fuel feed pump

Injection nozzle sticking

Replace the injection nozzle

Injection nozzle

Injection nozzle injection starting pressure
too low 
Improper spray condition

Adjust or replace the injection 
nozzle

Defective delivery valve resulting in fuel
drippage after fuel injection

Replace the delivery valve

Injection pump