Opel Frontera UE. Manual - part 914

 

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Opel Frontera UE. Manual - part 914

 

 

6E2–42

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

3. Select F3: Miscellaneous Test in the Application

Menu.

060RW228

4. Select F7: Injector Balance Test in the Miscellaneous

Test.

060RX006

5. Select injector number and push “injector off” of soft

key.

060RW230–1

6. Make sure of engine speed change.
7. If engine speed changes, the injector electric circuit is

normal.
If engine speed does not changes, the injector electric
circuit or the injector itself is not normal.

Plotting Snapshot Graph

This test selects several necessary items from the data
list to plot graphs and makes data comparison on a long
term basis. It is an effective test particularly in emission
related evaluations.

060RX037

For trouble diagnosis, you can collect graphic data (snap
shot) directly from the vehicle. You can replay the
snapshot data as needed. Therefore, accurate diagnosis
is possible, even though the vehicle is not available.

6E2–43

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Plotting Graph Flow Chart (Plotting graph after obtaining vehicle information)

060RX085

6E2–44

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Flow Chart for Snapshot Replay (Plotting Graph)

060RX040

6E2–45

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Primary System-Based Diagnostics

Primary System-Based Diagnostics

There are primary system-based diagnostics which
evaluate system operation and its effect on vehicle
emissions.  The primary system-based diagnostics are
listed below with a brief description of the diagnostic
function:

Oxygen Sensor Diagnosis
The fuel control heated oxygen sensors (Bank 1 HO2S 1
and Bank 2 HO2S 1) are diagnosed for the following
conditions:

D

Heater performance (time to activity on cold start)

D

Slow response

D

Response time (time to switch R/L or L/R)

D

Inactive signal (output steady at bias voltage –
approx. 450 mV)

D

Signal fixed high

D

Signal fixed low

If the oxygen sensor pigtail wiring, connector or terminal
are damaged, the entire oxygen sensor assembly must
be replaced.  DO NOT attempt to repair the wiring,
connector or terminals.  In order for the sensor to function
properly, it must have clean reference air provided to it.
This clean air reference is obtained by way of the oxygen
sensor wire(s).  Any attempt to repair the wires, connector
or terminals could result in the obstruction of the
reference air and degrade oxygen sensor performance.
Refer to 

On-Vehicle Service Heated Oxygen Sensors.

Fuel Control Heated Oxygen Sensors

The main function of the fuel control heated oxygen
sensors is to provide the control module with exhaust
stream oxygen content information to allow proper fueling
and maintain emissions within mandated levels.  After it
reaches operating temperature, the sensor will generate
a voltage, inversely proportional to the amount of oxygen
present in the exhaust gases.  The control module uses
the signal voltage from the fuel control heated oxygen
sensors while in closed loop to adjust fuel injector pulse
width.  While in closed loop, the PCM can adjust fuel
delivery to maintain an air/fuel ratio which allows the best
combination of emission control and driveability.  The fuel
control heated oxygen sensors are also used to
determine catalyst efficiency.

HO2S Heater

Heated oxygen sensors are used to minimize the amount
of time required for closed loop fuel control to begin
operation and to allow accurate catalyst monitoring.  The
oxygen sensor heater greatly decreases the amount of
time required for fuel control sensors (Bank 1 HO2S 1 and
Bank2 HO2S 1) to become active.

 

 

 

 

 

 

 

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