1998 OPEL FRONTERA Electrical

6E–66
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Engine Coolant Temperature Sensor
CFOhms
Temperature vs. Resistance Values
(approximate)
25772796
15594450
DTC P0117 – ECT 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 Cool Temp” display on the Tech 2.
Is the “Eng Cool 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 P0117.
Does the Tech 2 indicate DTC P0117 failed this
ignition?
—Go to Step 4
Refer to
Diagnostic
Aids
41. Disconnect the ECT sensor electrical connector.
2. Observe the “Eng Cool Temp” display on the Tech 2.
Is the “Eng Cool 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 ECT signal
circuit for a short to ground or a short to the sensor
ground circuit.
3. If the ECT signal circuit is shorted. repair it as
necessary.
Was the ECT signal circuit shorted to ground?
—Verify repairGo to Step 7
6Replace the ECT 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–68
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 P0118 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 ECT 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 ECT sensor. If the ECT sensor appears to be
OK, the fault is intermittent; refer to
Diagnostic Aids.
Engine Coolant Temperature Sensor
CFOhms
Temperature vs. Resistance Values
(approximate)
80176332
25772796
15594450
DTC P0118 – ECT 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 Cool Temp” display on the Tech 2.
Is the “Eng Cool 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
P0118.
Does the Tech 2 indicate DTC P0118 failed?
—
Refer to Te s t
Description
Refer to
Diagnostic
Aids
41. Disconnect the ECT sensor electrical connector.
2. Jumper the ECT signal circuit and the sensor
ground circuit together at the ECT sensor harness
connector.
3. Observe the “Eng Cool Temp” display on the Tech 2.
Is the “Eng Cool Temp” at the specified value?
140C
(284
F)Go to Step 6Go to Step 5
51. Jumper the ECT signal circuit at the ECT sensor
harness connector to chassis ground.
2. Observe the “Eng Cool Temp” display on the Tech 2.
Is the “Eng Cool Temp” at the specified value?
140C
(284
F)Go to Step 7Go to Step 8
6Check for poor connections at the ECT 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 ECT sensor
ground circuit for an open.
3. If the ECT sensor ground circuit is open, repair it as
necessary.
Was the ECT sensor ground circuit open?
—Verify repairGo to Step 9

6E–73 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0122 –AP Sensor Low Voltage
StepNo Ye s Va l u e ( s ) Action
31. Ignition “ON,” engine “OFF.”
2. With the throttle closed, observe the “AP Sensor”
display on the Tech 2.
Is the “AP Sensor” below the specified value?
0.1 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 the “DTC” info for DTC
P0122.
Does the Tech 2 indicate DTC P0122 failed?
—Go to Step 5
Refer to
Diagnostic
Aids
51. Ignition “OFF.”
2. Disconnect the AP sensor electrical connector.
3. Jumper the 5 volt reference “J2” circuit and the AP
signal together at the AP sensor harness connector.
4. Ignition “ON.”
Observe the “AP Sensor” display on the Tech 2.
Is the “AP Sensor” at the specified value?
5 VGo to Step 11Go to Step 6
61. Disconnect jumper.
2. Connect a test light between B+ and the AP sensor
signal circuit at the AP sensor harness connector.
Observe the “AP Sensor” display on the Tech 2.
Is the “AP Sensor” at the specified value?
5 VGo to Step 7Go to Step 9
71. Ignition “OFF.”
2. Disconnect the ECM and check the 5 volt reference
“A” circuit for an open or short to ground.
3. If the 5 volt reference “J2” circuit is open or shorted
to ground, repair it as necessary.
Was the 5 volt reference “J2” circuit open or shorted to
ground?
—Verify repairGo to Step 8
8Check the 5 volt reference “J2” circuit for a poor
connection at the ECM and replace the terminal if
necessary.
Did the terminal require replacement?
—Verify repairGo to Step 13
91. Ignition “OFF.”
2. Disconnect the ECM, and check the AP signal
circuit for an open, short to ground, or short to the
sensor ground circuit.
3. If the AP sensor signal circuit is open or shorted to
ground, repair it as necessary.
Was the AP signal circuit open or shorted to ground?
—Verify repairGo to Step 10
10Check the AP sensor signal circuit for a poor
connection at the ECM and replace the terminal if
necessary.
Did the terminal require replacement?
—Verify repairGo to Step 13
11Check the AP sensor signal circuit for a poor
connection at the AP sensor and replace the terminal if
necessary.
Did the terminal require replacement?
—Verify repairGo to Step 12

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

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
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?
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 P0182.
Does the Tech 2 indicate DTC P0182 failed this
ignition?
—Go to Step 4
Refer to
Diagnostic
Aids
41. Disconnect the FT sensor electrical connector.
2. Observe the “Fuel Temp” display on the Tech 2.
Is the “Fuel 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 FT signal circuit
for a short to ground or a short to the sensor ground
circuit.
3. If the FT signal circuit is shorted. repair it as
necessary.
Was the FT signal circuit shorted to ground?
—Verify repairGo to Step 7
6Replace the FT 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–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—

6E–85 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0193 – RP 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. 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 P0108.
Does the Tech 2 indicate DTC P0108 failed this
ignition?
—Go to Step 3
Refer to
Diagnostic
Aids
3Check the RP sensor signal circuit.
Was the RP sensor signal circuit open or darmage?
—
Replace the
RP circuit
Go to Step 4
4Probe the sensor ground circuit with a test light to B+.
Is the test light “ON?”
—Go to Step 5Go to Step 7
51. Check the RP signal circuit for a short to voltage or a
short to the 5 volt reference “J1” circuit.
2. If the RP sensor signal circuit is shorted, repair
circuit as necessary.
Was the RP sensor signal circuit shorted?
—Verify repairGo to Step 6
61. Check for a poor sensor ground terminal connection
at the RP sensor electrical connector.
2. If a problem if found, replace the faulty terminal.
Did the terminal require replacement?
—Verify repairGo to Step 7
71. Check for a poor sensor ground terminal connection
at the ECM.
2. If a problem is found, replace the faulty terminal.
Did the terminal require replacement?
—Verify repairGo to Step 8
81. Check the continuity of the RP sensor ground
circuit.
2. If the RP sensor ground circuit measures over 5
ohms, repair open or poor connection.
Was a condition found and corrected?
—Verify repairGo to Step 9
9Replace the ECM (Refer to the Data Programming in
Case of ECM change).
Is the action complete?
—Verify Repair—

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—