Opel Frontera UBS. Manual - part 1384

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:

D

Poor connection or damaged EVRV – Inspect the
wiring harness for damage.

D

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–131

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

DTC P1403 – EGR EVRV Fault

 

Step

Action

Value(s)

Yes

No

1

Was the “On-Board Diagnostic (OBD) System Check”
performed?

—

Go to 

Step 2

Go to 

OBD

System

Check

2

Check the EVRV circuit.

Was the EVRV circuit darmage?

—

Replace the

EVRV circuit

Go to 

Step 3

3

1. Start the engine.
2. Monitor the MAP signal with a scan tool while idling.
3. While idling, jab the accelerator pedal about halfway

down and immediately let the engine return to idle.

Did the MAP value on the scan tool show an immediate
large change?

—

Go to 

Step 5

Go to 

Step 4

4

Replace the MAP sensor.

Is the action complete?

—

Verify repair

—

5

1. Inspect the exhaust system for modification of

original installed parts or leaks.

2. If a problem was found, repair exhaust system as

necessary.

Was a condition present that required repair?

—

Go to 

Step 8

Go to 

Step 6

6

1. Remove the EGR valve.
2. Visually and physically inspect the pintle, valve

passages and the adapter for excessive deposits or
any kind of a restriction.

3. If a problem is found, clean or replace EGR system

components as necessary.

Was a condition present that required repair?

—

Go to 

Step 8

Go to 

Step 7

7

1. Inspect the EGR passages for a blockage caused

by excessive deposits or other damage.

2. If a problem is found, correct the condition as

necessary.

Was a condition present that required repair?

—

Go to 

Step 8

Refer to

Diagnostic

Aids

8

1. Review and record the scan tool Failure Records

data.

2. Clear DTC and monitor the scan tool System Info

Screen while operating the vehicle as specified in
“Diagnostic Aids.”

3. Using a scan tool, monitor “DTC” info for DTC

P1403 until the DTC P1403 test runs.

4. Note the test result.

Does the scan tool indicate DTC P1403 failed this
ignition?

—

Go to the last

step

completed in

this

diagnostic

chart 

Repair

complete

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:

D

Poor connection or damaged VSV–inspect the wiring
harness for damage.

DTC P1404 – EGR VSV Circuit

 

Step

Action

Value(s)

Yes

No

1

Was the “On-Board Diagnostic (OBD) System Check”
performed?

—

Go to 

Step 2

Go to 

OBD

System

Check

2

1. 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–133

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

DTC P1404 – EGR VSV Circuit

  (Cont'd)

Step

No

Yes

Value(s)

Action

3

Check the VSV circuit.

Was the VSV circuit open or darmage?

—

Go to 

Step 4

Go to 

Step 5

4

Repair the opened VSV circuit or VSV.

Is the action complete?

—

Verify repair

—