Electrical OPEL FRONTERA 1998 Workshop Manual

6E–187 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Excessive Exhaust Emissions or Odors Symptom
StepActionVa l u e ( s )Ye sNo
1DEFINITION:
Vehicle fails an emission test. Vehicle has excessive
“rotten egg” smell. (Excessive odors do not necessarily
indicate excessive emissions.)
Was the “On-Board Diagnostic (OBD) System Check”
performed?
—Go to Step 2
Go to OBD
System
Check
21. Perform a bulletin search.
2. If a bulletin that addresses the symptom is found,
correct the condition as instructed in the bulletin.
Was a bulletin found that addresses the symptom?
—Verify repairGo to Step 3
3Was a thorough visual/physical check performed?
—Go to Step 4
Go to Visual/
Physical
Check
41. Check for vacuum leaks. Check vacuum lines,
intake manifold, throttle body, etc.
2. If a problem is found, repair as necessary.
Were any vacuum leaks located?
—Verify repairGo to Step 5
51. Check the fuel cap for proper installation.
2. Secure the fuel cap if necessary.
Was the fuel cap installed properly?
—Go to Step 6Verify repair
61. Injector Test
Operate the each injector by Tech 2 with the
ignition “ON” and check if the working noise
confirm.
2. If a problem is found, check the harness or replace
the injector.
Is the action complete?
—Verify repairGo to Step 7
71. Refer to Engine Cooling for cooling system
diagnosis.
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 8
81. Check for an engine mechanical problem.
Perform a cylinder compression check (Refer to
Engine Mechanical).
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 9
91. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:
Visual/physical inspection
Te c h 2 d a t a
Freeze Frame data/Failure Records butter
All electrical connections within a suspected
circuit and/or system.
3. If a problem is found, repair as necessary.
Was a problem found?
—Verify repair
Contact
Te c h n i c a l
Assistance

6E–188
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Dieseling, Run-On Symptom
StepActionVa l u e ( s )Ye sNo
1DEFINITION:
Engine continues to run after key is turned “OFF,” but
runs very rough. If engine runs smooth, check ignition
switch and adjustment.
Was the “On-Board Diagnostic (OBD) System Check”
performed?
—Go to Step 2
Go to OBD
System
Check
21. Perform a bulletin search.
2. If a bulletin that addresses the symptom is found,
correct the condition as instructed in the bulletin.
Was a bulletin found that addresses the symptom?
—Verify repairGo to Step 3
3Was a visual/physical check performed?
—Go to Step 4
Go to Visual/
Physical
Check
41. Check for a short between B+ and any of the ignition
feed circuits.
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 5
51. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:
Visual/physical inspection
Te c h 2 d a t a
Freeze Frame data/Failure Records butter
All electrical connections within a suspected
circuit and/or system
3. If a problem is found, repair as necessary.
Was a problem found?
—Verify repair
Contact
Te c h n i c a l
Assistance

6E–189 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Cuts Out, Symptom
StepActionVa l u e ( s )Ye sNo
1DEFINITION:
Steady pulsation or jerking that follows engine speed;
usually more pronounced as engine load increases.
Was the “On-Board Diagnostic (OBD) System Check”
performed?
—Go to Step 2
Go to OBD
System
Check
21. Perform a bulletin search.
2. If a bulletin that addresses the symptom is found,
correct the condition as instructed in the bulletin.
Was a bulletin found that addresses the symptom?
—Go to Step 7Go to Step 3
3Was a visual/physical check performed?
—Go to Step 4
Go to Visual/
Physical
Check
41. Check the ECM grounds for clearness, tightness
and proper routing. Refer to the ECM wiring
diagrams in
Electrical Diagnosis.
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 5
51. Check for incorrect idle speed. Ensure that the
following conditions are present:
The engine is fully warm.
The accessories are “off.”
2. Using a Tech 2, monitor the AP position.
Is the AP position within the specified values?
0%Go to Step 6Go to Step 7
61. Visually/physically inspect for the following
conditions:
Restricted air intake system. Check for a
possible collapsed air intake duct, restricted
air filter element, or foreign objects blocking
the air intake system.
Check the Throttle body.
Large vacuum leak. Check for a condition that
causes a large vacuum leak, such as an
incorrectly installed or faulty VSV or brake
booster hose disconnected .
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 7
7Using a Tech 2, monitor the AP angle with the engine
idling.
Is the AP angle at the specified value and steady?
0%Go to Step 8
Refer to DTC
P0123
for
further
diagnosis
81. Check the transmission range switch circuit. Use a
Tech 2 and be sure the Tech 2 indicates that the
vehicle is in drive with the gear selector in drive or
overdrive.
2. If a problem is found, diagnose and repair the
transmission range switch as necessary.
Was a problem found?
—Verify repairGo to Step 9

6E–190
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Cuts Out, Symptom
StepNo Ye s Va l u e ( s ) Action
91. Injector Test
Operate the each injector by Tech 2 with the
ignition “ON” and check if the working noise
confirm.
2. If a problem is found, check the harness or replace
the injector.
Is the action complete?
—Verify repairGo to Step 10
101. Check the following engine mechanical items.
Refer to
Engine Mechanical for diagnosis
procedures:
Low compression
Sticking or leaking valves
Worn camshaft lobe(s)
Camshaft drive belt slipped or stripped
Incorrect valve timing
Broken valve springs
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 11
111. Check for faulty motor mounts. Refer to Engine
Mechanical
for inspection of mounts.
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 12
121. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:
Visual/physical inspection
Te c h 2 d a t a
Freeze Frame data/Failure Records butter
All electrical connections within a suspected
circuit and/or system
3. If a problem is found, repair as necessary.
Was a problem found?
—Verify repair
Contact
Te c h n i c a l
Assistance

6E–191 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Starter Motor Doesn’t Rotate
StepActionVa l u e ( s )Ye sNo
1DEFINITION:
As starter motor doesn’t rotate, engine is not cranked.
1. Perform a bulletin search.
2. If a bulletin that addresses the symptom is found,
correct the condition as instructed in the bulletin.
Was the bulletin found?
—Verify repairGo to Step 2
2Was a visual/physical check performed?
—Go to Step 3
Go to Visual/
Physical
Check
31. Check battery cord terminal for looseness & poor
contact due to corrosion.
2. Check battery voltage.
3. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 4
41. Check fan belt for looseness & damage.
2. If a problem is found, adjust or replace as
necessary.
Was a problem found?
—Verify repairGo to Step 5
51. Check fuse bull link for disconnection & short.
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 6
61. Check generator for mount & damage (Refer to
Engine Mechanical).
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 7
71. Check starter SW and starter relay for looseness
and damage.
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 8
81. Check starter motor for mount and damage. (Refer
to
Engine Mechanical)
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 9
91. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:
Visual/physical inspection
Te c h 2 d a t a
Freeze Frame data/Failure Records butter
All electrical connections within a suspected
circuit and/or system
3. If a problem is found, repair as necessary.
Was a problem found?
—Verify repair
Contact
Te c h n i c a l
Assistance

6E–193 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Starting Difficulty In Case Fuel Doesn’t Come to Injector
StepNo Ye s Va l u e ( s ) Action
121. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:
Visual/physical inspection
Te c h 2 d a t a
Freeze Frame data/Failure Records butter
All electrical connections within a suspected
circuit and/or system
3. If a problem is found, repair as necessary.
Was a problem found?
—Verify repair
Contact
Te c h n i c a l
Assistance

6E–195 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Lubrication System Trouble
StepNo Ye s Va l u e ( s ) Action
111. Check cylinder head & cam carrier gaskets for
damage.
2. If a problem is found, repair or replace as
necessary.
Was a problem found?
—Verify repairGo to Step 12
121. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:
Visual/physical inspection
Te c h 2 d a t a
Freeze Frame data/Failure Records butter
All electrical connections within a suspected
circuit and/or system
3. If a problem is found, repair as necessary.
Was a problem found?
—Verify repair
Contact
Te c h n i c a l
Assistance

6E–196
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
QOS System Doesn’t Work
StepActionVa l u e ( s )Ye sNo
1Was OBD System check performed?
—Go to Step 2
Go to OBD
System
Check
2Check glawplug indicator light. If bulb is broken,
replace.
Was a problem found?
—Verify repairGo to Step 3
31. Connect a circuit tester between glawplug & engine
ground.
2. With ignition on and engine off, check if the glaw
indicator and circuit tester indicate power voltage
for 9 to 13 sec. If not indicated, repair terminal & wire
harness.
Was repair needed?
—Verify repairGo to Step 4
41. Connect a circuit tester between glawplug and
engine ground.
2. With engine on, check if voltage continues for 180
sec. If not, inspect and repair glaw relay.
Was repair needed?
—Verify repairGo to Step 5
51. Remove the glawplug, and if damaged, replace.
2. Check glawplug resistance.
Was resistance as specified?
0.8 – 1Go to Step 7Go to Step 6
6Replace glawplug.
Was measure completed?
—Verify repairGo to Step 7
71. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:
Visual/physical inspection
Te c h 2 d a t a
Freeze Frame data/Failure Records butter
All electrical connections within a suspected
circuit and/or system
3. If a problem is found, repair as necessary.
Was a problem found?
—Verify repair
Contact
Te c h n i c a l
Assistance

6E–197 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Much Black Smoke in Exhaust Gas
StepActionVa l u e ( s )Ye sNo
1DEFINITION:
In road tests, much black smoke is mixed.
Was OBD System check performed?
—Go to Step 2
Go to OBD
System
Check
21. Perform a bulletin research.
2. If a bulletin that addresses the symptom is found,
correct the condition as instructed in the bulletin.
Was a bulletin found?
—Verify repairGo to Step 3
31. Check if a correct fuel is used.
2. If a problem is found, change fuel.
Was a problem found?
—Verify repairGo to Step 4
41. Check air cleaner element for clogging.
2. If a problem is found, repair or replace as
necessary.
Was a problem found?
—Verify repairGo to Step 5
51. Connect Tech 2 to the vehicle.
2. Monitor data list to check injector function.
3. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 6
61. Connect Tech 2 to the vehicle.
2. Monitor RPCV test to check rpcv function.
3. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 7
71. Check valve clearance.
2. If a problem is found, adjust as necessary.
Was a problem found?
—Verify repairGo to Step 8
81. Review all diagnostic procedures in this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:
Visual/physical check
Tech 2 data list
Freeze Frame data
All electrical connections in suspected circuits
& systems
3. If a problem is found, repair as necessary.
Was a problem found?
—Verify repair
Contact
Te c h n i c a l
Assistance

6E–198
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Excess Engine Oil Consumption
StepActionVa l u e ( s )Ye sNo
1DEFINITION:
Oil consumption measured in road tests is higher than
expected.
Was OBD System check performed?
—Go to Step 2
Go to OBD
System
Check
21. Perform a bulletin research.
2. If a bulletin that addresses the symptom is found,
correct the condition as instructed in the bulletin.
Was a bulletin found?
—Verify repairGo to Step 3
31. Check if a correct engine oil is used.
2. If a problem is found, change engine oil.
Was a problem found?
—Verify repairGo to Step 4
41. Check oil pipe connections for leakage.
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 5
51. Check oil seals and gaskets for leakage.
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 6
61. Connect Tech 2 to the vehicle.
2. Perform RPCV test to check its function.
3. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 7
71. Check piston ring for damage & groove wear.
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 8
81. Check valve stem, valve guide and oil controller for
wear.
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 9
91. Check camshaft carrier & cylinder head gaskets for
blow-by.
2. If a problem is found, repair or replace as
necessary.
Was a problem found?
—Verify repairGo to Step 10
101. Review all the diagnostic procedures in this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:
Visual/physical check
Tech 2 data list
Freeze Frame data
All electrical connections in suspected circuits
& systems
3. If a problem is found, repair as necessary.
Was a problem found?
—Verify repair
Contact
Te c h n i c a l
Assistance