immobilizer OPEL FRONTERA 1998 User Guide

6E–111 ENGINE DRIVEABILITY AND EMISSIONS
DTC P0103 – MAF Sensor Circuit High Frequency
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 P0103.
Does the Tech 2 indicate DTC P0103 failed this
ignition?
—Go to Step 3
Refer to
Diagnostic
Aids
31. Start the engine.
2. With the engine idling, monitor “MAF Frequency”
display on the Tech 2.
Is “MAF Frequency” above the specified value?
219 g/SecGo to Step 4Go to Step 7
41. Ignition “OFF.”
2. Disconnect the MAF sensor connector.
3. Ignition “ON,” engine idling.
4. Using a Tech 2, monitor “MAF Frequency.”
Does the Tech 2 indicate a “MAF Frequency” at the
specified value?
0.0 g/SecGo to Step 5Go to Step 6
5Replace the MAF sensor.
Is the action complete?
—Verify repairGo to Step 8
61. Check the MAF harness for incorrect routing near
high voltage components (solenoids, relays,
motors).
2. If incorrect routing is found, correct the harness
routing.
Was a problem found?
—Verify repairGo to Step 7
71. With the engine idling, monitor “MAF Frequency”
display on the Tech 2.
2. Quickly snap open throttle to wide open throttle
while under a road load and record value.
Does the Tech 2 indicate “MAF Frequency” above the
specified value?
219 g/SecGo to Step 5Go to Step 8
8Replace the PCM.
IMPORTANT:The replacement PCM must be
programmed. Refer to
UBS 98model year Immobilizer
Workshop Manual.
Is the action complete?—Verify repair—

6E–114
ENGINE DRIVEABILITY AND EMISSIONS
DTC P0107 – MAP Sensor Circuit Low Voltage
StepNo Ye s Va l u e ( s ) Action
9Check the MAP sensor signal circuit for a poor
connection at the PCM and the MAP sensor; replace
the terminal if necessary.
Did the terminal require replacement?
—Verify repairGo to Step 11
10Replace the MAP sensor.
Is the action complete?
—Verify repair—
11Replace the PCM.
IMPORTANT:The replacement PCM must be
programmed. Refer to
UBS 98model year Immobilizer
Workshop Manual.
Is the action complete?—Verify repair—

6E–117 ENGINE DRIVEABILITY AND EMISSIONS
DTC P0108 – MAP Sensor Circuit High Voltage
StepNo Ye s Va l u e ( s ) Action
11Replace the PCM.
IMPORTANT:The replacement PCM must be
programmed. Refer to
UBS 98model year Immobilizer
Workshop Manual.
Is the action complete?—Verify Repair—
12Replace the MAP sensor.
Is the action complete?
—Verify repair—

6E–120
ENGINE DRIVEABILITY AND EMISSIONS
DTC P0112–IAT Sensor Circuit 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. Using a Tech 2, monitor the intake air temperature
(IAT).
Is the intake air temperature greater than the specified
value?
148C
(283
F)Go to Step 4Go to Step 3
31. Ignition “ON,” engine “OFF.” Review and record
Tech 2 Failure Records data.
2. Operate the vehicle within Failure Records
conditions as noted.
3. Using a Tech 2, monitor the “Specific DTC” info for
DTC P0112.
Does the Tech 2 indicate DTC P0112 failed this
ignition?
—
Refer to Te s t
Description
Refer to
Diagnostic
Aids
41. Ignition “OFF.”
2. Disconnect the IAT sensor electrical connector.
3. Ignition “ON.”
4. Observe the intake air temperature on the Tech 2.
Is the intake air temperature below the specified value?
–38C
(–36
F)Go to Step 6Go to Step 5
51. Ignition “OFF.”
2. Disconnect the PCM electrical connectors.
3. Check the IAT sensor signal circuit for a short to
ground.
Is the IAT sensor signal circuit shorted to ground?
—Verify repairGo to Step 7
6Replace the IAT sensor.
Is the action complete?
—Verify repair—
7Replace the PCM.
IMPORTANT:The replacement PCM must be
programmed. Refer to
UBS 98model year Immobilizer
Workshop Manual.
Is the action complete?—Verify repair—

6E–123 ENGINE DRIVEABILITY AND EMISSIONS
DTC P0113 –IAT Sensor Circuit High Voltage
StepNo Ye s Va l u e ( s ) Action
6Check for poor connections at the IAT sensor and
replace terminals if necessary.
Did any terminals require replacement?
—Verify repairGo to Step 10
71. Ignition “OFF.”
2. Disconnect the PCM, and check the IAT sensor
ground circuit for an open.
3. If the IAT sensor ground circuit is open, repair it as
necessary.
Was the IAT sensor ground circuit open?
—Verify repairGo to Step 9
81. Ignition “OFF.”
2. Disconnect the PCM, and check the IAT signal
circuit for an open.
3. If the IAT sensor signal circuit is open, repair it as
necessary.
Was the IAT signal circuit open?
—Verify repairGo to Step 9
9Check for a poor sensor ground or IAT signal circuit
terminal connection at the PCM and replace
terminal(s) if necessary.
Did any of the terminals need to be replaced?
—Verify repairGo to Step 11
10Replace the IAT sensor.
Is the action complete?
—Verify repair—
11Replace the PCM.
IMPORTANT:The replacement PCM must be
programmed. Refer to
UBS 98model year Immobilizer
Workshop Manual.
Is the action complete?—Verify repair—

6E–126
ENGINE DRIVEABILITY AND EMISSIONS
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 “Specific 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 PCM 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 PCM.
IMPORTANT:The replacement PCM must be
programmed. Refer to
UBS 98model year Immobilizer
Workshop Manual.
Is the action complete?—Verify repair—

6E–129 ENGINE DRIVEABILITY AND EMISSIONS
DTC P0118 – ECT Sensor Circuit High Voltage
StepNo Ye s Va l u e ( s ) Action
71. Ignition “OFF.”
2. Disconnect the PCM, 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
81. Ignition “OFF.”
2. Disconnect the PCM, and check the ECT signal
circuit for an open.
3. If the ECT sensor signal circuit is open, repair it as
necessary.
Was the ECT signal circuit open?
—Verify repairGo to Step 9
9Check for a poor sensor ground or ECT signal circuit
terminal connection at the PCM 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 PCM.
IMPORTANT:The replacement PCM must be
programmed. Refer to
UBS 98model year Immobilizer
Workshop Manual.
Is the action complete?—Verify repair—

6E–132
ENGINE DRIVEABILITY AND EMISSIONS
DTC P0121 –TP System Performance
StepNo Ye s Va l u e ( s ) Action
10Check the following items:
1. TP signal circuit or 5 volt reference “A” circuit for a
poor connection.
2. TP signal circuit or 5 volt reference “A” circuit for
high resistance between the PCM and the TP
sensor.
3. If a problem is found, repair wiring harness as
necessary.
Was a problem found?
—Verify repairGo to Step 12
11Replace the TP sensor.
Is the action complete?
—Verify repair—
12Replace the PCM.
IMPORTANT:The replacement PCM must be
programmed. Refer to
UBS 98model year Immobilizer
Workshop Manual.
Is the action complete?—Verify repair—

6E–135 ENGINE DRIVEABILITY AND EMISSIONS
DTC P0122 –TP Sensor Circuit Low Voltage
StepNo Ye s Va l u e ( s ) Action
10Check the TP sensor signal circuit for a poor
connection at the TP sensor and replace the terminal if
necessary.
Did the terminal require replacement?
—Verify repairGo to Step 11
11Replace the TP sensor.
Is the action complete?
—Verify repair—
12Replace the PCM.
IMPORTANT:The replacement PCM must be
programmed. Refer to
UBS 98model year Immobilizer
Workshop Manual.
Is the action complete?—Verify repair—

6E–138
ENGINE DRIVEABILITY AND EMISSIONS
DTC P0123 – TP Sensor Circuit High Voltage
StepNo Ye s Va l u e ( s ) Action
101. Ignition “OFF.”
2. Disconnect the PCM, and check for an open sensor
ground circuit to the TP sensor.
3. If a problem is found, repair it as necessary.
Was the sensor ground circuit to the TP sensor open?
—Verify repairGo to Step 12
11Replace the TP sensor.
Is the action complete?
—Verify repair—
12Replace the PCM.
IMPORTANT:The replacement PCM must be
programmed. Refer to
UBS 98model year Immobilizer
Workshop Manual.
Is the action complete?—Verify repair—