Opel Frontera UBS. Manual - part 1232

 

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Opel Frontera UBS. Manual - part 1232

 

 

6E–294

ENGINE DRIVEABILITY AND EMISSIONS

D

Bank 2 sensor 1 is mounted on the exhaust pipe
ahead of the catalytic converter.

TS22914

3. Disconnect the pigtail from the wiring harness.

TS23739

IMPORTANT:

The pigtail is permanently attached to

the sensor.  Be careful not to pull the wires out.

NOTE: Do not use a torch to remove an HO2S unless the
sensor is being replaced.  Using a torch could damage the
sensor.

4. Remove the sensor from the exhaust pipe.

D

Because of the expansion and contraction of the
metal in the exhaust system over time, this may be
difficult if the engine temperature is below 48

°

C

(120

°

F).

TS23739

Inspection Procedure

All two sensors are identical.  Inspect each in the same
way.
1. Inspect the pigtail and the electrical connector for

grease, dirt, corrosion, and bare wires or worn
insulation.

2. Inspect the louvered end of the sensor for grease,

dirt, or other contaminations.

TS23739

6E–295

ENGINE DRIVEABILITY AND EMISSIONS

Installation Procedure

IMPORTANT:

D

A special anti-seize compound, P/N 5613695, is used
on the HO2S threads.  This compound consists of
glass beads suspended in a liquid graphite solution.
The graphite burns away with engine heat, but the
glass beads will remain, making the sensor easier to
remove.

D

New or service sensors will already have the
compound applied to the threads.  If a sensor is
removed and is to be reinstalled for any reason, the
threads must have anti-seize compound applied.

1. Apply anti-seize compound or the equivalent to the

threads of the oxygen sensor, if necessary.

2. Install the oxygen sensor on the exhaust pipe in its

original position.

Tighten

D

Tighten the oxygen sensor to 55 N·m (40 lb in.).

TS23739

3. Connect the pigtail to the wiring harness.
4. Connect the negative battery cable.

Intake Air Temperature (IAT)

Sensor

Removal Procedure

1. Disconnect the negative battery cable.
2. Remove the engine cover
3. The IAT sensor is located in the intake air duct, behind

the throttle body.

4. Disconnect the electrical connector from the IAT

sensor.

TS23741

5. Remove the IAT sensor from the intake air duct by

using a rocking motion while pulling the sensor.

Installation Procedure

1. Install the IAT sensor into the grommet in the intake

air duct.

2. Correct the IAT electrical connector.

TS23741

3. Install the engine cover.
4. Connect the negative battery cable.

6E–296

ENGINE DRIVEABILITY AND EMISSIONS

Knock Sensor (KS)

Removal Procedure

1. Disconnect the negative battery cable.
2. Drain the cooling system.  Refer to 

Draining and

Filling the Cooling System in Engine Cooling.

3. Remove the engine cover.
4. Remove the common chamber assembly.

Refer to Common Chamber in Engine Mechanical.

014RW106

5. Disconnect the electrical connector from the knock

sensor.

014RW103

6. Unscrew the knock sensor from the engine block.

Installation Procedure

NOTE: Do not apply thread sealant to the sensor threads.
The sensor is coated at the factory and applying
additional sealant will affect the sensor’s ability to detect
detonation.

1. Screw the knock sensor into the engine block.

Tighten

D

Tighten the knock sensor to 20 N·m (177 lb in.).

014RW103

2. Connect the electrical connector to the knock sensor.
3. Install the common chamber assembly.

Refer to Common Chamber in Engine Mechanical.

014RW106

4. Install the engine cover.
5. Fill the cooling system.

Refer to Draining and Filling the Cooling System in
Engine Cooling.

6. Connect the negative battery cable.

6E–297

ENGINE DRIVEABILITY AND EMISSIONS

Mass Air Flow (MAF) Sensor

Removal Procedure

1. Disconnect the negative battery cable.
2. Disconnect the electrical connector from the MAF

sensor.

TS23740

3. Loosen the clamps which secure the intake air duct

and the air cleaner to the MAF sensor.

4. Remove the intake air duct from the MAF sensor.
5. Remove the MAF sensor from the air cleaner.

TS23781

Installation Procedure

1. Install the MAF sensor on the air cleaner with the

clamp.

2. Install the intake air duct and the clamp on the MAF

sensor.

TS23781

3. Tighten the clamps to secure the MAF sensor to the

intake air duct and the air cleaner.

4. Connect the MAF electrical connector.
5. Connect the negative battery cable.

Manifold Absolute Pressure

(MAP) Sensor

Removal Procedure

1. Disconnect the negative battery cable.
2. Disconnect the electrical connector from the MAP

sensor.

055RW005

3. Remove the bolt securing the MAP sensor to the

mounting bracket on the common chamber.

 

 

 

 

 

 

 

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