sensor OPEL FRONTERA 1998 Workshop Manual

6E–199 4JX1–TC 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 ofthe 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 ChartsInitial DiagnosisDefault Section(s)
On-Board Diagnostic (OBD) System
CheckVehicle does not enter diagnostics.Chassis Electrical
On-Board Diagnostic (OBD) System
CheckVehicle enters diagnostics and
communicates with the Tech 2. MIL is
“ON” in diagnostics. Engine does not
start and run.HEUI System Check
On-Board Diagnostic (OBD) System
CheckEngine starts and runs, no ECM codes
set. Customer complains of vibration.—
On-Board Diagnostic (OBD) System
CheckEngine starts and runs, no ECM 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
ECM Power and Ground CheckOn-Board Diagnostic (OBD) System
Check.Chassis Electrical
ECM Power and Ground CheckOn-Board Diagnostic (OBD) System
Check. ECM power and ground circuits
OK. Data link voltage incorrect.Chassis Electrical
On-Board Diagnostic (OBD) System
CheckEngine starts and runs, no ECM 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
SymptomsInitial DiagnosisDefault Section(s)
Intermittents1. On-board diagnostic (OBD)
system check.
2. Careful visual/physical inspections.Chassis Electrical
Hard Starts1. OBD system check.
2. Sensors (ECT, MAP, EGR, AP) ;
output chart.
3. Fuel system electrical test, fuel
system diagnosis.
4. Injector system.Engine Mechanical, Injector
System Check, Exhaust System
Diagnosis
Surges and/or Chuggles1. OBD system check.
2. Fuel system diagnosis.
3. Injector system.Calibration ID “Broadcast”
/Service Bulletins, Ignition
System Check, Generator
Output, Exhaust System
Diagnosis
Lack of Power, Sluggish or Spongy1. OBD system check.
2. Fuel system diagnosis.
3. Injector system.Refer to Exhaust System in
Engine Exhaust, TCC
Operation, Calibration
ID/Service Bulletins

6E–201 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
On–Vehicle Service
Camshaft Position (CMP)
Sensor
Removal Procedure
1. Disconnect the negative battery cable.
2. Disconnect the electrical connector to the CMP
sensor.
035RW071
3. Remove the CMP sensor retaining bolt from the
cylinder head cover.
035RW075
Inspection Procedure
1. Inspect the sensor O-ring for cracks or leaks.
2. Replace the O-ring if it is worn or damaged.
3. Lubricate the new O-ring with engine oil.
4. Install the lubricated O-ring.
Installation Procedure
1. Install the CMP sensor in the cylinder head cover.
2. Install the CMP sensor retaining bolt.
Tighten
Tighten the retaining bolt to 9 Nꞏm (78 lb in.).
035RW075
3. Connect the electrical connector to the CMP sensor.
035RW071
4. Connect the negative battery cable.

6E–202
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Crankshaft Position (CKP)
Sensor
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the under cover.
035RW091
3. Disconnect the electrical connector to the CKP
sensor.
4. Remove one bolt and the CKP sensor from the left
side of the engine block.
NOTE: Use caution to avoid any hot oil that might drip
out.
035RW090
Inspection Procedure
1. Inspect the sensor O-ring for cracks or leaks.
2. Replace the O-ring if it is worn or damaged.
3. Lubricate the new O-ring with engine oil.
4. Install the lubricated O-ring.
Installation Procedure
1. Install the CKP sensor in the engine block.
2. Install the CKP sensor mounting bolt.
Tighten
Tighten the mounting bolt to 9 Nꞏm (78 lb in.).
035RW090
3. Connect the electrical connector to the CKP sensor.
4. Install the under cover.
035RW091
5. Connect the negative battery cable.

6E–203 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Engine Coolant Temperature
(ECT) Sensor
Removal Procedure
NOTE: Care must be taken when handling the engine
coolant temperature (ECT) sensor. Damage to the ECT
sensor will affect proper operation of the fuel injection
system.
1. Disconnect the negative battery cable.
2. Drain the radiator coolant. Refer to
Draining and
Refilling Cooling System
in Engine Cooling.
3. Disconnect the electrical connector.
4.Remove the ECT sensor from the front side of the
intake manifold.
035RW058
Installation Procedure
1. Apply sealer (LOCTITE 262) or the equivalent to the
threads of the ECT sensor.
2. Install the ECT sensor in the front side of the intake
manifold.
Tighten
Tighten the ECT sensor to 19 Nꞏm (14 lb ft.).
3. Connect the electrical connector.
035RW058
4. Fill the radiator with coolant. Refer to Draining and
Refilling Cooling System
in Engine Cooling.
5. Connect the negative battery cable.
Intake Air Temperature (IAT)
Sensor
Removal Procedure
1. Disconnect the negative battery cable.
2. Disconnect the electrical connector from the IAT
sensor.
3. Remove the IAT sensor from the intake air duct by
using a rocking motion while pulling the sensor.
035RW056

6E–204
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Installation Procedure
1. Install the IAT sensor into the grommet in the intake
air duct.
035RW056
2. Correct the IAT electrical connector.
3. Connect the negative battery cable.
Manifold Absolute Pressure
(MAP) Sensor
Removal Procedure
1. Disconnect the negative battery cable.
2. Disconnect the EGR valve.
035RW054
3. Disconnect the MAP sensor connector from the MAP
sensor.
035RW053
4.Remove the bolts and the MAP sensor from the
intake manifold.
035RW057

6E–205 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Installation Procedure
1. Install the MAP sensor and bolts on the intake
manifold.
Torque: 4 Nꞏm (35 lb in)
035RW057
2. Connect the MAP sensor connector.
035RW053
3. Connect the EGR valve.
035RW054
4. Connect the negative battery cable.
Oil Temperature (OT) Sensor
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the battery.
035RW095

6E–206
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
3. Disconnect the electrical connector from the OT
sensor.
4. Remove the OT sensor.
035RW061
Installation Procedure
1. Install the OT sensor.
035RW061
2. Connect the OT sensor electrical connector.
3. Install the battery.
035RW095
4. Connect the negative battery cable.
Malfunction Indicator Lamp
(MIL)
Removal and Installation Procedure
Refer to Meter in Electrical section.
Engine Control Module (ECM)
Service Precaution
NOTE: To prevent possible electrostatic discharge
damage to the ECM, do not touch the connector pins or
soldered components on the circuit board.
When replacing the ECM to prevent possible electro
damage, follow these guidelines:
Before removing the ECM, disconnect the negative
battery cable.
Before install the ECM, install the negative battery cable.
Electrostatic Discharge (ESD)
Damage
Electronic components used in the control systems are
often designed to carry very low voltage. Electronic
components are susceptible to damage caused by
electrostatic discharge. Less than 100 volts of static
electricity can cause damage to some electronic
components. By comparison, it takes as much as 4,000
volts for a person to even feel the zap of a static
discharge.
There are several ways for a person to become statically
charged. The most common methods of charging are by
friction and by induction. An example of charging by
friction is a person sliding across a car seat.
Charging by induction occurs when a person with well
insulated shoes stands near a highly charged object and
momentarily touches ground. Charges of the same
polarity are drained off leaving the person highly charged
with the opposite polarity. Static charges can cause

6E–208
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Installation Procedure
1. Install the ECM.
035RW092
2. Install the bolts, ECM bracket and battery bracket.
035RW094
3. Connect the ECM connector.
035RW093
4. Connect the negative battery cable.
If the ECM is replaced, the new ECM will need to be
programmed.
EEPROM
General Description
The Electronically Erasable Programmable Read Only
Memory (EEPROM) is a permanent memory that is
physically soldered within the ECM. The EEPROM
contains program and calibration information that the
ECM needs to control powertrain operation.
Functional Check
1. Perform the On-Board Diagnostic System Check.
2. Start the engine and run for one minute.
3. Scan for DTCs using the Tech 2.
Intake Throttle Position (ITP)
Sensor
Removal Procedure
1. Disconnect the negative battery cable.

6E–209 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
2. Remove the cover of the intercooler.
035RW051
3. Remove the bolts and the left side bracket to the
intercooler.
4 . R e m o v e t h e a i r d u c t w i t h b r a c k e t f r o m t h e i n t e r c o o l e r.
5. Remove the throttle body from the intake manifold.
6. Disconnect the ITP sensor electrical connector and
throttle motor control connector.
7. Remove the bolts and the ITP sensor from the throttle
body.
035RW086
NOTE: Do not clean the ITP sensor by soaking it in
solvent. The sensor will be damaged as a result.
Function Check
Use a Tech 2 to check the ITP sensor output voltage at
closed throttle.
The voltage should be under 0.85 volt.
If the reading is greater than 0.85 volt, check the
throttle shaft to see if it is binding.
If the throttle shaft is not binding and the throttle cable
is properly adjusted, install a new ITP sensor.
Installation Procedure
1. Install the ITP sensor on the throttle body with the
bolts.
035RW051
2. Install the throttle body to the intake manifold and the
air duct with bracket between throttle body and
intercooler.
Torque: 20 Nꞏm (14 Ib ft)
035RW086
3. Connect the ITP sensor electrical connector and
throttle motor control connector.
4. Install the bracket to the intercooler.
5. Install the cover of intercooler.
6. Install the negative battery cable.

6E–210
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Vehicle Speed Sensor (VSS)
Removal Procedure
CAUTION: The VSS is located on the right side of
the transfer case just ahead of the rear propeller
shaft and very close to the exhaust pipes. Be sure
that the exhaust pipes are cool enough to touch
before trying to remove the VSS. If the pipes are hot,
you could be burned.
1. Disconnect the negative battery cable.
2. Disconnect the VSS electrical connector.
TS23748
3. Remove the bolt and the clamp securing the VSS in
place.
IMPORTANT:H a v e a c o n t a i n e r r e a d y t o c a t c h a n y f l u i d
that leaks out when the VSS is removed from the transfer
case.
TS23780
4. Remove the VSS from the transfer case by wiggling it
slightly and pulling it straight out.
Inspection Procedure
1. Inspect the electrical connector for signs of corrosion
or warping. Replace the VSS if the electrical
connector is corroded or warped.
2. Inspect the VSS driven gear for chips, breaks, or worn
condition. Replace the VSS if the driven gear is
chipped, broken or worn.
3. Inspect the O-ring for wear, nicks, tears, or
looseness. Replace the O-ring if necessary.
Installation Procedure
1. Install the VSS in the transfer case with the notch for
the connector facing the rear.
2. Secure the VSS in place with the clamp and the bolt.
Tighten
Tighten the bolt to 16 Nꞏm (12 lb ft.).
TS23780
3. Connect the VSS electrical connector.
TS23748
4. Check the transfer case oil level. Add fluid if
necessary.