Opel Frontera UE. Manual - part 1550

6E–415

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Hesitation, Sag, Stumble Symptom

  (Cont'd)

Step

No

Yes

Value(s)

Action

17

1. Visually/physically check vacuum hoses for splits,

kinks, and proper connections and routing as
shown on the “Vehicle Emission Control
Information” label.

2. If a problem is found, repair as necessary.

Was a problem found?

—

Verify repair

Go to 

Step 18

18

1. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no

malfunctions have been found, review/inspect the
following:

D

Visual/physical inspection

D

Tech 2 data

D

Freeze Frame data/Failure Records butter

D

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

Technical

Assistance

SECTION

6E–416

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Default Matrix Table

Service Procedure Default Strategy

A referral strategy has been established to assist the
technician with additional information when the cause of
the failure cannot be determined.  If no problem is found
after performing diagnostics, then refer to the default
matrix table for further diagnostic information.

Default Matrix Table

Strategy Based Diagnostic Charts

Initial Diagnosis

Default Section(s)

On-Board Diagnostic (OBD) System
Check

Vehicle does not enter diagnostics.

Chassis Electrical

On-Board Diagnostic (OBD) System
Check

Vehicle enters diagnostics and
communicates with the Tech 2.  MIL is
“ON” in diagnostics.  Engine does not
start and run.

Ignition System Check

On-Board Diagnostic (OBD) System
Check

Engine starts and runs, no PCM
codes set.  Customer complains of
vibration.

—

On-Board Diagnostic (OBD) System
Check

Engine starts and runs, no PCM
codes set.  Customer complains of
harsh or soft shift, poor performance,
delayed or no engagement into drive
or reverse, transmission fluid leak,
transmission noise or vibration, or
improper TCC operation.

Automatic Transmission

PCM Power and Ground Check

On-Board Diagnostic (OBD) System
Check.

Chassis Electrical

PCM Power and Ground Check

On-Board Diagnostic (OBD) System
Check. PCM power and ground
circuits OK. Data link voltage
incorrect.

Chassis Electrical

On-Board Diagnostic (OBD) System
Check

Engine starts and runs, no PCM
codes set.  Customer complains of
harsh or soft shift, poor performance,
delayed or no engagement into drive
or reverse, transmission fluid leak,
transmission noise or vibration, or
improper TCC operation.

Automatic Transmission

Symptoms

Initial Diagnosis

Default Section(s)

Intermittents

1. On-board Diagnostic (OBD)

system check.

2. Careful visual/physical

inspections.

Chassis Electrical

Hard Starts

1. OBD system check.
2. ETC system check.
3. Sensors (ECT, MAP, MAF, TP) ;

MAP output chart.

4. Fuel system electrical test, fuel

system diagnosis.

5. Ignition system.

Engine Mechanical, Ignition
System Check, Exhaust System
Diagnosis

Surges and/or Chuggles

1. OBD system check.
2. ETC system check.
3. Heated oxygen sensors.
4. Fuel system diagnosis.
5. Ignition system.

Calibration ID/Service Bulletins,
Ignition System Check,
Generator Output, Exhaust
System Diagnosis, 4L30-E
System Test

SECTION

6E–417

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Symptoms

Default Section(s)

Initial Diagnosis

Lack of Power, Sluggish or Spongy

1. OBD system check.
2. ETC system check.
3. Fuel system diagnosis.
4. Ignition system.
5. EGR operation.
6. EGR system check.

Refer to 

Exhaust System in

Engine Exhaust, TCC Operation,
Calibration ID/Service Bulletins

Detonation/Spark Knock

1. OBD system check.
2. Transmission range switch.
3. EGR operation.
4. EGR system check.
5. TCC operation.
6. Fuel system diagnosis.
7. Ignition system.
8. ION sensing module check.

TCC operation, Cooling System,
Ignition System Check,
Calibration ID/Service Bulletins

Rough, Unstable, or Incorrect Idle,
Stalling

1. OBD system check.
2. ETC system check.
3. Fuel injector and fuel injector

balance test.

4. EVAP emission canister purge

valve check.

5. Ignition system.
6. EGR operation.

MAP Output Check, Throttle
Linkage, EGR System Check,
A/C Clutch Control Circuit
Diagnosis, Crankcase Ventilation
System, Calibration ID/Service
Bulletins, Generator Output
Voltage (refer to 

Chassis

Electrical), Exhaust Diagnosis

Poor Fuel Economy

1. OBD system check.
2. Careful visual/physical inspection.
3. Ignition system.
4. Cooling system.

TCC Operation, Exhaust System
(refer to 

Engine Exhaust)

Hesitation, Sag, Stumble

1. OBD system check.
2. ETC system check.
3. TP.
4. MAP output check.
5. Fuel system diagnosis.
6. Fuel injector and fuel injector

balance test.

7. EVAP emission canister purge

valve.

8. Ignition system.

EGR Operation, EGR System
Check, Generator Output
Voltage (refer to 

Chassis

Electrical), Calibration ID/Service
Bulletins, Ignition System Check

Cuts Out, Misses

1. OBD system check.
2. Cylinder balance test.
3. ETC system check.

Ignition System Check

Engine Cranks But Will Not Run

1. OBD system check.

Fuel System Electrical
Diagnosis, Fuel System
Diagnosis, Fuel Injector and Fuel
Injector Balance Test.

SECTION

6E–418

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Symptoms

Default Section(s)

Initial Diagnosis

Excessive Exhaust Emissions or
Odors

1. OBD system check.
2. Emission test.
3. Cooling system.
4. Fuel system diagnosis.
5. Fuel injector and fuel injector

balance test.

6. EVAP emission canister purge

valve.

7. Crankcase ventilation system.
8. Ignition system.
9. MAP output check.

EGR System Check, Exhaust
Diagnosis, Calibration ID/Service
Bulletins

Dieseling, Run-On

1. OBD system check.
2. Careful visual/physical inspection.
3. Fuel system diagnosis.

—

Backfire

1. OBD system check.
2. Ignition system.
3. Fuel system diagnosis.
4. Fuel injector and fuel injector

balance test.

5. EGR operation, EGR system

check.

Exhaust System Diagnosis,
Intake Casting Flash, Ignition
System Check

Misfire

1. OBD system check.
2. Ignition system.
3. Fuel system diagnosis.
4. Fuel injector and fuel injector

balance test.

Vibrations, Transmission,
Driveshaft and Axle

Catalyst Monitor

1. OBD system check.
2. Careful visual/physical inspection.
3. Heated oxygen sensors.

Exhaust System

Fuel Trim

1. OBD system check.
2. Careful visual/physical inspection.
3. Fuel system diagnosis.
4. Heated oxygen sensors, MAF

sensors.

Exhaust System Intake Air
System

Evaporative Emissions

1. OBD system check.
2. Careful visual/physical inspection.
3. Fuel system diagnosis.

—

Heated Oxygen Sensors

1. OBD system check.
2. Careful visual/physical inspection.

Exhaust System

SECTION