wiring OPEL FRONTERA 1998 Workshop Manual

6E–126
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0380 (Flash DTC 66)
Glow Relay Circuit Open/Short
060RW132
Circuit Description
Glow relay circuit receives current through Glow 50A fuse
from the battery. Glow relay is circuited to Glow plug.
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 P0380 can be cleared by using the Tech 2 “Clear
Info” function or by disconnecting the ECM battery
feed.
Diagnostic Aids
An intermittent may be caused by a poor connection,
rubbed-through wire insulation or a wire broken inside the
insulation. Check for:
Poor connection – Inspect the ECM harness and
connectors for improper mating, broken locks,
improperly formed or damaged terminals, and poor
terminal-to-wire connection.
Damaged harness – Inspect the wiring harness for
damage.

6E–128
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0381 (Flash DTC 67)
Glow Lamp Circuit Open/Short
060RW136
Circuit Description
Glow Lamp Circuit receives current through Meter 10A
fuse, Glow lamp being circuited to ECM.
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 P0381 can be cleared by using the Tech 2 “Clear
Info” function or by disconnecting the ECM battery
feed.
Diagnostic Aids
An intermittent may be caused by a poor connection,
rubbed-through wire insulation or a wire broken inside the
insulation. Check for:
Poor connection – Inspect the ECM harness and
connectors for improper mating, broken locks,
improperly formed or damaged terminals, and poor
terminal-to-wire connection.
Damaged harness – Inspect the wiring harness for
damage.

6E–130
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P1403 (Flash DTC 32)
EGR EVRV Fault
060RW135
Circuit Description
EGR EVRV Circuit has a common power source in
parallel with EGR, VSV, RPCV, and Intake Throttle Motor.
This may cause multiple DTCs. On such occasion, refer
to “Multiple ECM Information sensor DTCs Set”.
Diagnostic Aids
Check for the following conditions:
Poor connection or damaged EVRV – Inspect the
wiring harness for damage.
Ensure EVRV is correctly mounted. See On-Vehicle
Service.
Reviewing the Failure Records vehicle mileage since the
diagnostic test last failed may help determine how often
the condition that caused the DTC to be set occurs. This
may assist in diagnosing the condition.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart
3. A malfunctioning MAP sensor can set an EGR DTC.
The MAP sensor could send a constant signal which
is not low enough to set a low MAP DTC. The
constant signal from the MAP sensor also may not
be high enough to set a high MAP DTC. This step
verifies that the MAP sensor is responding.

6E–132
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P1404 (Flash DTC 31)
EGR VSV Circuit
060RW135
Circuit Description
The Engine control module (ECM) monitors the EGR
valve input to ensure that the valve responds properly to
commands from the ECM, and to detect a fault if VSV is
stuck open. When the VSV is fixing at closed and opening
the ECM will set DTC P1404.
Diagnostic Aids
Check for the following conditions:
Poor connection or damaged VSV–inspect the wiring
harness for damage.
DTC P1404 – EGR VSV Circuit
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”, review and record
scan tool Failure Records data.
2. Operate the vehicle within Failure Records
conditions as noted.
3. Using a scan tool, monitor “Specific DTC” info for
DTC P1404 until the DTC P1404 test runs. Note the
result.
Does the scan tool indicates DTC P1404 failed this
ignition?
—Go to Step 3
Refer to
Diagnostic
Aids

6E–134
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0405 (Flash DTC 26)
EGR Pressure Sensor Low Voltage
060RW134
Action Taken When the DTC Sets
The ECM will illuminate the malfunction indicator lamp
(MIL) as soon as failure detected.
The ECM will store conditions which were present
w h e n t h e D T C w a s s e t a s F r e e z e F r a m e a n d i n F a i l u r e
Records data.
Conditions for Clearing the MIL/DTC
DTC P0405 can be cleared by using the scan tool
“Clear Info” function or by disconnecting the ECM
battery feed.
Diagnostic Aids
Check for the following conditions:
Poor connection or damaged harness – Inspect the
wiring harness for damage.
DTC P0405 – EGR Pressure 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
2Put the engine into an idling status.
Is the EGR pressure sensor voltage value displayed on
the Tech 2 below the specified value?
0.25 VGo to Step 3
Refer to
Diagnostic
Aids
andSymp
tom
Diagnosis

6E–136
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P1405 (Flash DTC 37)
EGR EVRV Circuit Open/Short
060RW135
Circuit Description
EGR EVRV Circuit has a common power source in
parallel with EGR, VSV, RPCV, and Intake Throttle Motor.
This may cause multiple DTCs. On such occasion, refer
to “Multiple ECM Information Sensor DTCs Set”.
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 P1405 can be cleared by using the Tech 2 “Clear
Info” function or by disconnecting the ECM battery
feed.
Diagnostic Aids
An intermittent may be caused by a poor connection,
rubbed-through wire insulation or a wire broken inside the
insulation. Check for:
Poor connection – Inspect the ECM harness and
connectors for improper mating, broken locks,
improperly formed or damaged terminals, and poor
terminal-to-wire connection.
Damaged harness – Inspect the wiring harness for
damage.

6E–138
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0406 (Flash DTC 26)
EGR Pressure Sensor High Voltage
060RW134
Action Taken When the DTC Sets
The ECM will illuminate the malfunction indicator lamp
(MIL) as soon as failure detected.
The ECM will store conditions which were present
w h e n t h e D T C w a s s e t a s F r e e z e F r a m e a n d i n F a i l u r e
Records data.
Conditions for Clearing the MIL/DTC
DTC P0404 can be cleared by using the scan tool
“Clear Info” function or by disconnecting the ECM
battery feed.
Diagnostic Aids
Check for the following conditions:
Poor connection or damaged harness – Inspect the
wiring harness for damage.
DTC P0406 – EGR Pressure 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
2Put the engine into an idling status.
Is the EGR pressure sensor voltage value displayed on
the Tech 2 above the specified value?
4 VGo to Step 3Go to Step 4
31. Turn off the ignition switch.
2. Remove the sensor connector connection.
3. Turn on the ignition switch “ON”.
Is the EGR pressure sensor voltage value displayed on
the Tech 2 below the specified value?
1 VGo to Step 5Go to Step 6

6E–140
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0475 (Flash DTC 71)
EXH #1 VSV Circuit
060RW135
Circuit Description
EXH. #1, #2 VSV Circuit receives current through Engine
15A fuse, #1 and #2 being connected in parallel.
Action Taken When the DTC Sets
The ECM will illuminate the malfunction indicator lamp
(MIL) the first time the fault is detected.
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 P0475 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.

6E–142
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P1475 (Flash DTC 71)
EXH #2 VSV Circuit Open/Short
060RW135
Circuit Description
EXH. #1, #2 VSV Circuit receives current through Engine
15A fuse, #1 and #2 being connected in parallel.
Action Taken When the DTC Sets
The ECM will illuminate the malfunction indicator lamp
(MIL) the first time the fault is detected.
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 P1475 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.

6E–144
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P1485 (Flash DTC 74)
ITP (Intake Thorottle Position) Sensor Low Voltage
060RW134
Circuit Description
The intake throttle position (ITP) sensor circuit provides a
voltage signal that changes relative to throttle blade
angle.
Action Taken When the DTC Sets
The ECM will illuminate the malfunction indicator lamp
(MIL) the first time the fault is detected.
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 P1485 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
throttle position display on the Tech 2 while
moving connectors and wiring harnesses related
to the ITP sensor. A change in the display will
indicate the location of the fault.
If DTC P1485 cannot be duplicated, the information
included in the Failure Records data can be useful in
determining vehicle mileage since the DTC was last set.
DTC P1485 –ITP 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. With the throttle closed by the hand, observe the
“ITP Sensor” display on the Tech 2.
Is the “ITP Sensor” below the specified value?
0.22 VGo to Step 4Go to Step 3