1998 OPEL FRONTERA check engine

6E–91 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P1195 – RP System High Voltage
StepActionVa l u e ( s )Ye sNo
1Was the “On-Board Diagnostic (OBD) System Check”
performed?
—Go to Step 2
Go to OBD
System
Check
21. Engine is running.
2. Review and record Tech 2 Failure Records data.
3. Operate the vehicle within Failure Records
conditions as noted.
4. Using a Tech 2, monitor “DTC” info for DTC P1195.
Does the Tech 2 indicate DTC P1195 failed?
—Go to Step 3
Refer to
Diagnostic
Aids
3Connect a test light between B+ and the RP sensor
signal circuit at the RP sensor harness connector.
Is the RP value near the specified value.
0 VGo to Step 4Go to Step 6
41. Ignition “OFF.”
2. Disconnect the ECM and check the ground circuit
for an open.
Was the ground circuit open?
—Verify repairGo to Step 5
5Check the ground circuit for a poor connection at the
ECM and replace the terminal if necessary.
Did the terminal require replacement?
—Verify repairGo to Step 6
6Check the RP sensor signal circuit for a poor
connection at the ECM and the RP sensor; replace the
terminal if necessary.
Did the terminal require replacement?
—Verify repairGo to Step 7
7Replace the ECM (Refer to the Data Programming in
Case of ECM change).
Is the action complete?
—Verify repairGo to Step 8
8Check the 2 way valve.
Was the 2 way valve darmage?
—
Replace the 2
way valve
Go to Step 9
9Replace the RPCV.
Is the action complete?
—Verify repairGo to Step 10
10Replace the RP sensor.
Is the action complete?
—Verify repair—

6E–93 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Circuit Description
The rail pressure control valve (RPCV) is built in the high
pressure oil circuit.
RPCV is an important device which is used to control oil
pressure in the HEUI system.
The circuit receives current through Engine 15A fuse from
the battery, current flowing in the order of RPCV.
Action Taken When the DTC Sets
The ECM will store conditions which were present
when the DTC was set as Freeze Frame and in the
Failure Records data.
Conditions for Clearing the MIL/DTC
DTC P1196 can be cleared by using the Tech 2 “Clear
Info” function or by disconnecting the ECM battery
feed.
Diagnostic Aids
Check for the following conditions:
Poor connection at ECM – Inspect harness connectors
for backed-out terminals, improper mating, broken
locks, improperly formed or damaged terminals, and
poor terminal-to-wire connection.
Damaged harness – Inspect the wiring harness for
damage. If the harness appears to be OK, observe the
Rail Pressure Control display on the Tech 2 while
moving connectors and wiring harnesses related to the
Rail Pressure Control. A change in the Rail Pressure
Control display will indicate the location of the fault.
If DTC P1196 cannot be duplicated, the information
included in the Failure Records data can be useful in
determining vehicle mileage since the DTC was last set.
If it is determined that the DTC occurs intermittently.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.
2. Verifies that the fault is present.
DTC P1196 – RP System High Warning
StepActionVa l u e ( s )Ye sNo
1Was the “On-Board Diagnostic (OBD) System Check”
performed?
—Go to Step 2
Go to OBD
System
Check
21. Engine is running.
2. Observe the “Rail Pressure Control” display on the
Te c h 2 .
Is the action correct?
—Go to Step 4Go to Step 3
3Replace the RPCV.
Is the action complete?
—Verify repairGo to Step 4
41. Engine is running.
2. Review and record Tech 2 Failure Records data.
3. Operate the vehicle within Failure Records
conditions as noted.
4. Using a Tech 2, monitor “ DTC” info for DTC P1196.
Does the Tech 2 indicate DTC P1196 failed this
ignition?
—Go to Step 5—
51. Check the 2 way valve.
2. Observe the “RP Control” display on the Tech 2.
Is the action correct?
—Go to Step 4Go to Step 6
6Replace the 2 way valve.
Is the action complete?
—Verify repair—

6E–94
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0197 (Flash DTC 16)
Oil Temp Sensor Low Voltage
060RW129
Circuit Description
The engine oil temperature (OT) sensor is a thermistor
mounted in the oil rail. The Engine Control Module ECM
applies a voltage (about 5 volts) through a pull-up resistor
to the ECT signal circuit. When the engine oil is cold, the
sensor (thermistor) resistance is high, therefore the ECM
will measure a high signal voltage. As the engine oil
warms, the sensor resistance becomes lower, and the OT
signal voltage measured at the ECM drops.
Action Taken When the DTC Sets
The ECM will store conditions which were present
when the DTC was set as Freeze Frame and in the
Failure Records data.
Conditions for Clearing the MIL/DTC
DTC P0197 can be cleared by using the Tech 2 “Clear
Info” function or by disconnecting the ECM battery
feed.
Diagnostic Aids
Check for the following conditions:
Poor connection at ECM – Inspect harness connectors
for backed-out terminals, improper mating, broken
locks, improperly formed or damaged terminals, and
poor terminal-to-wire connection.
Damaged harness – Inspect the wiring harness for
damage. If the harness appears to be OK, observe the
OT display on the Tech 2 while moving connectors and
wiring harnesses related to the OT sensor. A change
in the OT display will indicate the location of the fault.
If DTC P0197 cannot be duplicated, the information
included in the Failure Records data can be useful in
determining vehicle mileage since the DTC was last set.
If it is determined that the DTC occurs intermittently.

6E–95 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.
2. Verifies that the fault is present.
3. If DTC P0197 can be repeated only by duplicating
the Failure Records conditions, refer to the
“Temperature vs. Resistance Values” table. The
table may be used to test the OT sensor at various
temperatures to evaluate the possibility of a
“shifted” sensor that may be shorted above or below
a certain temperature. If this is the case, replace
the OT sensor. If the OT sensor appears to be OK,
the fault is intermittent; refer to
Diagnostic Aids.
Engine Oil Temperature Sensor
CFOhms
Temperature vs. Resistance Values
(approximate)
80176332
25772796
15594450
DTC P0197 – OT Sensor Low Voltage
StepActionVa l u e ( s )Ye sNo
1Was the “On-Board Diagnostic (OBD) System Check”
performed?
—Go to Step 2
Go to OBD
System
Check
21. Ignition “ON,” engine “OFF.”
2. Observe the “Eng Oil Temp” display on the Tech 2.
Is the “Eng Oil Temp” below the specified value?
139C
(282
F)Go to Step 4Go to Step 3
31. Ignition “ON,” engine “OFF.”
2. Review and record Tech 2 Failure Records data.
3. Operate the vehicle within Failure Records
conditions as noted.
4. Using a Tech 2, monitor “ DTC” info for DTC P0197.
Does the Tech 2 indicate DTC P0197 failed this
ignition?
—Go to Step 4
Refer to
Diagnostic
Aids
41. Disconnect the OT sensor electrical connector.
2. Observe the “Eng Oil Temp” display on the Tech 2.
Is the “Eng Oil Temp” at the specified value?
–39C
(–38
F)Go to Step 6Go to Step 5
51. Ignition “OFF.”
2. Disconnect the ECM and check the OT signal circuit
for a short to ground or a short to the sensor ground
circuit.
3. If the OT signal circuit is shorted. repair it as
necessary.
Was the OT signal circuit shorted to ground?
—Verify repairGo to Step 7
6Replace the OT sensor.
Is the action complete?
—Verify repair—
7Replace the ECM (Refer to the Data Programming in
Case of ECM change).
Is the action complete?
—Verify repair—

6E–96
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0198 (Flash DTC 16)
Oil Temp Sensor High Voltage
060RW129
Circuit Description
The engine oil temperature (OT) sensor is a thermistor
mounted in the oil rail. The Engine Control Module ECM
applies a voltage (about 5 volts) through a pull-up resistor
to the ECT signal circuit. When the engine oil is cold, the
sensor (thermistor) resistance is high, therefore the ECM
will measure a high signal voltage. As the engine oil
warms, the sensor resistance becomes lower, and the OT
signal voltage measured at the ECM drops.
Action Taken When the DTC Sets
The ECM will store conditions which were present
when the DTC was set as Freeze Frame and in the
Failure Records data.
Conditions for Clearing the MIL/DTC
DTC P0198 can be cleared by using the Tech 2 “Clear
Info” function or by disconnecting the ECM battery
feed.
Diagnostic Aids
Check for the following conditions:
Poor connection at ECM – Inspect harness connectors
for backed-out terminals, improper mating, broken
locks, improperly formed or damaged terminals, and
poor terminal-to-wire connection.
Damaged harness – Inspect the wiring harness for
damage. If the harness appears to be OK, observe the
OT display on the Tech 2 while moving connectors and
wiring harnesses related to the OT sensor. A change
in the OT display will indicate the location of the fault.
If DTC P0198 cannot be duplicated, the information
included in the Failure Records data can be useful in
determining vehicle mileage since the DTC was last set.
If it is determined that the DTC occurs intermittently.

6E–97 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.
2. Verifies that the fault is present.
3. If DTC P0198 can be repeated only by duplicating
the Failure Records conditions, refer to the
“Temperature vs. Resistance Value” table. The
table may be used to test the OT sensor at various
temperatures to evaluate the possibility of a
“shifted” sensor that may be shorted above or below
a certain temperature. If this is the case, replace
the OT sensor. If the OT sensor appears to be OK,
the fault is intermittent; refer to
Diagnostic Aids.
Engine Oil Temperature Sensor
CFOhms
Temperature vs. Resistance Values
(approximate)
80176332
25772796
15594450
DTC P0198 – OT Sensor High Voltage
StepActionVa l u e ( s )Ye sNo
1Was the “On-Board Diagnostic (OBD) System Check”
performed?
—Go to Step 2
Go to OBD
System
Check
21. Ignition “ON,” engine “OFF.”
2. Observe the “Eng Oil Temp” display on the Tech 2.
Is the “Eng Oil Temp” below the specified value?
–39C
(–38
F)Go to Step 4Go to Step 3
31. Ignition “ON,” engine “OFF.”
2. Review and record Tech 2 Failure Records data.
3. Operate the vehicle within Failure Records
conditions as noted.
4. Using a Tech 2, monitor the “ DTC” info for DTC
P0198.
Does the Tech 2 indicate DTC P0198 failed?
—
Refer to Te s t
Description
Refer to
Diagnostic
Aids
41. Disconnect the OT sensor electrical connector.
2. Jumper the OT signal circuit and the sensor ground
circuit together at the OT sensor harness
connector.
3. Observe the “Eng Oil Temp” display on the Tech 2.
Is the “Eng Oil Temp” at the specified value?
140C
(284
F)Go to Step 6Go to Step 5
51. Jumper the OT signal circuit at the OT sensor
harness connector to chassis ground.
2. Observe the “Eng Oil Temp” display on the Tech 2.
Is the “Eng Oil Temp” at the specified value?
140C
(284
F)Go to Step 7Go to Step 8
6Check for poor connections at the OT sensor and
replace terminals if necessary.
Did any terminals require replacement?
—Verify repairGo to Step 10
71. Ignition “OFF.”
2. Disconnect the ECM, and check the OT sensor
ground circuit for an open.
3. If the OT sensor ground circuit is open, repair it as
necessary.
Was the OT sensor ground circuit open?
—Verify repairGo to Step 9

6E–98
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0198 – OT Sensor High Voltage
StepNo Ye s Va l u e ( s ) Action
81. Ignition “OFF.”
2. Disconnect the OT, and check the OT signal circuit
for an open.
3. If the OT sensor signal circuit is open, repair it as
necessary.
Was the OT signal circuit open?
—Verify repairGo to Step 9
9Check for a poor sensor ground or OT signal circuit
terminal connection at the ECM and replace
terminal(s) if necessary.
Did any of the terminals need to be replaced?
—Verify repairGo to Step 11
10Replace the ECT sensor.
Is the action complete?
—Verify repair—
11Replace the ECM (Refer to the Data Programming in
Case of ECM change).
Is the action complete?
—Verify repair—

6E–100
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0201 – Injector # 1 Circuit Fault
StepActionVa l u e ( s )Ye sNo
1Was the “On-Board Diagnostic (OBD) System Check”
performed?
—Go to Step 2
Go to OBD
System
Check
2Will the engine start?
—Go to Step 3
Go to Engine
Cranks But
Will Not Run
chart
31. Install the Tech 2. Clear the DTC.
2. Idle the engine for one minute.
Does DTC P0201 reset?
—Go to Step 5Go to Step 4
41. Review the Freeze Frame data with the ignition
“ON” and the engine “OFF” and note the
parameters.
2. Operate the vehicle within the Freeze Frame
conditions as noted.
Does P0201 reset?
—Go to Step 5—
5Check the Injector test.
Does the working noise confirm?
—Go to Step 6Go to Step 7
61. Install the Tech 2. Clear the DTC.
2. Idle the engine for one minute.
Dose DTC P0201 reset?
—Verify repairGo to Step 7
7Check for an open circuit between the injector
connector and the ECM.
Was there an open circuit?
—Go to Step 8Go to Step 9
8Repair the open circuit.
Is the action complete?
—Verify repair—
9Replace the ECM (Refer to the Data Programming in
Case of ECM change).
Is the action complete?
—Verify repairGo to Step 10
10Replace the Injector (Refer to the Injector Group Sign
Programming).
Is the action complete?
—Verify repair—