1998 OPEL FRONTERA Workshop Manual

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Page 5505 of 6000

OPEL FRONTERA 1998 Workshop Manual 6E–76
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0123 – AP Sensor High Voltage
StepActionVa l u e ( s )Ye sNo
1Was the “On-Board Diagnostic (OBD) System Check”
performed?
—Go to Step 2

6E–76
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0123 – AP 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
2Check the AP sensor signal circuit.
Was the AP sensor signal circuit open or darmage?
—
Replace the
APS circuit
Go to Step 3
31. Ignition “ON,” engine “OFF.”
2. With the throttle closed, observe the “AP Sensor”
display on the Tech 2.
Is the “AP Sensor” above the specified value?
4.5 VGo to Step 5Go to Step 4
41. 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 P0123.
Does the Tech 2 indicate DTC P0123 failed.
—Go to Step 5
Refer to
Diagnostic
Aids
51. Disconnect the AP sensor electrical connector.
2. Observe the “AP Sensor” display on the Tech 2.
Is the “AP Sensor” near the specified value?
0 VGo to Step 6Go to Step 7
6Probe the sensor ground circuit at the AP sensor
harness connector with a test light connected to B+.
Is the test light “ON?”
—Go to Step 8Go to Step 11
71. Ignition “OFF,” disconnect the ECM.
2. Ignition “ON,” engine “OFF.”
3. Check for a short to voltage on the AP sensor signal
circuit.
4. If the AP sensor signal circuit is shorted, repair it as
necessary.
Was the AP sensor signal circuit shorted?
—Verify repairGo to Step 13
81. Ignition “ON.”
2. Monitor the “AP Sensor” Tech 2 display while
disconnecting each of the components that share
the 5 volt reference “J2” circuit (one at a time).
3. If the “AP Sensor” Tech 2 display changes, replace
the component that caused the display to change
when disconnected.
Does disconnecting any of these components cause
the “AP Sensor” display to change?
—Verify repairGo to Step 9
91. Ignition “OFF,” disconnect the ECM.
2. Ignition “ON,” engine “OFF.”
3. Check for a short to B+ on the 5 volt reference “A”
circuit.
4. If the 5 volt reference “J2” circuit is shorted, repair it
as necessary.
Was the 5 volt reference “J2” circuit shorted?
—Verify repairGo to Step 10
10Check for poor electrical connections at the AP sensor
and replace terminals if necessary.
Did any terminals require replacement?
—Verify repairGo to Step 12

Page 5506 of 6000

OPEL FRONTERA 1998 Workshop Manual 6E–77 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0123 – AP Sensor High Voltage
StepNo Ye s Va l u e ( s ) Action
111. Ignition “OFF.”
2. Disconnect the ECM, and check for an open sensor

Page 5507 of 6000

OPEL FRONTERA 1998 Workshop Manual 6E–78
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0182 (Flash DTC 15)
FT Sensor Low Voltage
060RW129
Circuit Description
The fuel temperature (FT) sensor is a thermis

Page 5508 of 6000

OPEL FRONTERA 1998 Workshop Manual 6E–79 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0182 – FT Sensor Low Voltage
StepActionVa l u e ( s )Ye sNo
1Was the “On-Board Diagnostic (OBD) System Check”
performed?
—Go to Step 2

Page 5509 of 6000

OPEL FRONTERA 1998 Workshop Manual 6E–80
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0183 (Flash DTC 15)
FT Sensor High Voltage
060RW129
Circuit Description
The fuel temperature (FT) sensor is a thermi

Page 5510 of 6000

OPEL FRONTERA 1998 Workshop Manual 6E–81 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0183 – FT Sensor High Voltage
StepActionVa l u e ( s )Ye sNo
1Was the “On-Board Diagnostic (OBD) System Check”
performed?
—Go to Step 2

6E–81 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0183 – FT 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 “Fuel Temp” display on the Tech 2.
Is the “Fuel 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
P0183.
Does the Tech 2 indicate DTC P0183 failed?
—
Refer to Te s t
Description
Refer to
Diagnostic
Aids
41. Disconnect the FT sensor electrical connector.
2. Jumper the FT signal circuit and the sensor ground
circuit together at the FT sensor harness connector.
3. Observe the “Fuel Temp” display on the Tech 2.
Is the “Fuel Temp” at the specified value?
140C
(284
F)Go to Step 6Go to Step 5
51. Jumper the FT signal circuit at the FT sensor
harness connector to chassis ground.
2. Observe the “Fuel Temp” display on the Tech 2.
Is the “Fuel Temp” at the specified value?
140C
(284
F)Go to Step 7Go to Step 8
6Check for poor connections at the FT 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 FT sensor
ground circuit for an open.
3. If the FT sensor ground circuit is open, repair it as
necessary.
Was the FT sensor ground circuit open?
—Verify repairGo to Step 9
81. Ignition “OFF.”
2. Disconnect the ECM, and check the FT signal
circuit for an open.
3. If the FT sensor signal circuit is open, repair it as
necessary.
Was the FT signal circuit open?
—Verify repairGo to Step 9
9Check for a poor sensor ground or FT 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 FT 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—

Page 5511 of 6000

OPEL FRONTERA 1998 Workshop Manual 6E–82
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0192 (Flash DTC 63)
Rail Pressure Sensor Low Voltage
060RW135
Circuit Description
The rail pressure (RP) sensor resp

Page 5512 of 6000

OPEL FRONTERA 1998 Workshop Manual 6E–83 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0192 – RP Sensor Low Voltage
StepActionVa l u e ( s )Ye sNo
1Was the “On-Board Diagnostic (OBD) System Check”
performed?
—Go to Step 2

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