Isuzu KB P190. Manual - part 609

6E–266

ENGINE DRIVEABILITY AND EMISSIONS

MANIFOLD ABSOLUTE PRESSURE (MAP)
SENSOR

Location
Installed on the intake manifold.

Removal Procedure

1. Disconenct the negative battery cable.

2. Disconnect a MAP sensor connector from the MAP

sensor.

3. Loosen a bolt and remove the MAP sensor from the

intake manifold.

4. Remove the MAP sensor from the bracket.

Installation Procedure

1. Tighten the MAP sensor by a bolt with specified

tightening torque.

Tightening Torque

• Bolt: 8N·m (0.8kgf·m)

2. Connect a MAP sensor connector to the MAP

sensor.

3. Connect the negative battery cable.

NOTE: Verify any DTCs (diagnosis Trouble Code) are
not stored after replacement.

THROTTLE POSITION SENSOR (TPS)

Location
Installed on the throttle body.

Removal Procedure

1. Disconnect the negative battery cable.

2. Disconnect the TPS connector.

3. Loosen two screws and remove TPS from the

throttle body.

Installation Procedure

1. Temporary tighten the TPS by two screws.

2. Connect a TPS connectors to the TPS.

3. Connect the Tech2 to the vehicle.

4. Connect the negative battery cable.

5. Select "Data Display" with the Tech2.

6. Check the throttle position data and adjust the TPS

position.

7. Tighten two screws.

NOTE: Verify any DTCs (diagnosis Trouble Code) are
not stored after replacement.

ENGINE DRIVEABILITY AND EMISSIONS

6E–267

IDLE AIR CONTROL (IAC) VALVE

Location
Installed on the throttle body.

Removal Procedure

1. Disconnect the negative battery cable.

2. Disconnect the IAC valve connector.

3. Loosen two screws and remove IAC valve from the

throttle body.

Cleaning and Inspection

1. Clean the IAC valve O-ring sealing surface, pintle

valve seat and air passage.

2. Use carburetor cleaner and a parts cleaning brush

to remove carbon deposit.
Do not use a cleaner that contain methyl ethyl
ketone. This is an extremely strong solvent and not
necessary for this type of deposit.

3. Shiny spots on the pintle are normal and do not

indicate misalignment or a bent pintle shaft.

4. Inspect the IAC valve O-ring for cuts, cracks or

distortion.

Measurement

• Clean the IAC valve O-ring sealing surface, pintle

valve seat and air passage.

• Use carburetor cleaner and a parts cleaning brush to

remove carbon deposit. Do not use a cleaner that
contain methyl ethyl ketone. This is an extremely
strong solvent and not necessary for this type of
deposit.

• Shiny spots on the pintle are normal and do not

indicate misalignment or a bent pintle shaft.

• Inspect the IAC valve O-ring for cuts, cracks or

distortion. Replace the O-ring if damaged.

Installation Procedure

1. Tighten the IAC valve by two screws.

2. Connect a IAC valve connector to the MAP sensor.

3. Connect the negative battery cable.

NOTE: Verify any DTCs (diagnosis Trouble Code) are
not stored after replacement.

6E–268

ENGINE DRIVEABILITY AND EMISSIONS

KNOCK SENSOR

Location
Right-hand side of the cylinder block.

Removal Procedure

1. Disconnect the negative battery cable.

2. Disconnect the knock sensor connector.

3. Loosen a bolt and remove knock sensor from the

cylinder block.

Installation Procedure

1. Tighten the knock sensor by a bolt with specified

tightening torque. 

Tightening Torque

• Bolt: 20N·m (2.0kgf·m)

2. Connect a knock sensor connector to the knock

sensor.

3. Connect the negative battery cable.

NOTE: Verify any DTCs (diagnosis Trouble Code) are
not stored after replacement.

POWER STEERING PRESSURE (PSP)
SWITCH

Location
Installed on the power steering pump assembly.

Removal Procedure

1. Disconnect the negative battery cable.

2. Disconnect the power steering pressure switch

connector.

3. Loosen and remove the power steering pressure

switch from the power steering pump.

Installation Procedure

1. Install the power steering pressure switch to the

power steering pump.

2. Tighten the power steering pressure switch.

3. Connect a connector to the power steering pressure

switch.

4. Connect the negative battery cable.

NOTE: Verify any DTCs (diagnosis Trouble Code) are
not stored after replacement.
Verify no power steering fluid leaking from the sensor
threads after replacement.

ENGINE DRIVEABILITY AND EMISSIONS

6E–269

HEATED OXYGEN SENSOR (HO2S)

Location
Installed on the exhaust pipe.

Removal Procedure

1. Disconnect the negative battery cable.

2. Disconnect the O

2

 sensor connector.

3. Loosen and remove the O

2

 sensor from the exhaust

pipe.

Inspection
Inspect the louvered end of the sensor for grease, dirt,
excessive carbon build up or other contamination.
Installation Procedure

1. Install the O

2

 sensor to the exhaust pipe.

2. Tighten the O

2

 sensor with specified tightening

torque.

Tightening Torque

• Bolt: 42N·m (4.3kgf·m)

3. Connect a O

2

 sensor connector to the O

2

 sensor.

4. Connect the negative battery cable.

NOTE: Verify any DTCs (diagnosis Trouble Code) are
not stored after replacement.
Verify no exhaust gas leaking from the sensor threads
after replacement.

EVAP CANISTER PURGE VALVE
SOLENOID

Location
On the intake manifold.

Removal Procedure

1. Disconenct the negative battery cable.

2. Disconnect a purge solenoid connector from the

purge solenoid.

3. Disconnect two hoses from the purge solenoid

valve.

4. Slide from the bracket and remove the purge

solenoid.

Installation Procedure

1. Insert EVAP purge solenoid valve onto the bracket.

2. Connect two hoses to the purge solenoid valve.

3. Connect a purge solenoid connector to the purge

solenoid.

4. Connect the negative battery cable.

NOTE: Verify any DTCs (diagnosis Trouble Code) are
not stored after replacement.
Verify proper connection of two hoses.