Opel Frontera UE. Manual - part 1537

6E–363

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

DTC P1404 – EGR Stuck Closed

  (Cont'd)

Step

No

Yes

Value(s)

Action

9

Replace the EGR valve.

Does DTC P1404 still fail “DTC” test on the Tech 2?

—

Go to 

Step 10

Verify repair

10

Replace the PCM.

IMPORTANT: The replacement PCM must be
programmed.  Refer to 

On-Vehicle Service in

Powertrain Control Module and Sensors for
procedures.

And also refer to latest Service Bulletin.

Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.

Is the action complete?

—

Verify repair

—

SECTION

6E–364

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Diagnostic Trouble Code (DTC) P1514 TPS - MAF Correlation Error

060R100073

Circuit Description

D

The throttle position (TP) sensor circuit provides a
voltage signal relative to throttle blade angle.
The throttle blade angle will vary about 8 % at closed
throttle to about 92 % at wide open throttle (WOT).

D

The mass air flow (MAF) sensor measures the amount
of air which passes through it into the engine during a
given time. The powertrain Control Module (PCM)
uses the mass air flow information to monitor engine
operating conditions for fuel delivery calculations.
A large quantity of air entering the engine indicates
an accelerator or high load situation, while a small
quantity or air indicates deceleration or idle.

The MAF sensor produces a frequency signal which
can be monitored using a Tech 2. The frequency will
vary within a range of around 4 to 7g/s at idle to
around 25 to 40g/s at maximum engine load.

Conditions for setting the DTC

D

The engine is running.

D

No MAF sensor DTCs are set.

D

Throttle actuation mode is not off.

D

MAF reading-ETC estimated air flow is less than 40g/s
for 250 failures within test 1000 test samples (15.6 m
sec).

Action Taken When the DTC Sets

D

The PCM will illuminate the malfunction indicator lamp
(MIL) the first time the fault is detected.

D

The PCM calculates an air flow value based on idle air
control valve position, throttle position, RPM and
barometric pressure.

D

The PCM will store condition which were present when
the DTC was set as Freeze Frame and in the Failure
Records data.

Conditions for Clearing the MIL/DTC

D

The PCM will turn the MIL “OFF” on the third
consecutive trip cycle during which the diagnostic has
been run and the fault conditions is no longer present.

D

A history DTC P1514 will clear after 40 consecutive trip
cycle during which the warm up cycles have occurred
without a fault.

D

DTC P1514 can be cleared using the Tech 2 “Clear
Info” function.

Diagnostic Aids

An intermittent may be caused by the following:

D

Poor connections.

D

Misrouted harness.

D

Rubbed through wire insulation.

D

Broken wire inside the insulation.

Check for the following conditions:

D

Poor connection at PCM - Inspect harness connectors
for backed out terminals, improper mating, broken
locks, improperly formed or damaged terminals, and
poor terminal to wire connection.

D

Damaged harness - Inspect the wiring harness for
damage. If the harness appears to be OK, observe the
Mass Air Flow, TP sensor 1, TP sensor 2 display on the

SECTION

6E–365

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Tech 2 while moving connectors and wiring harnesses
related to the sensor.

D

Plugged intake air duct or filter element

D

A wide - open throttle accelerator from a stop should
cause the mass air flow displayed on a Tech 2 to
increase from about 3 – 6 g/s at idle to 100 g/s or
greater at the time of the 1 – 2 shift. If not, check for a
restriction.

A change in the display will indicate the location of
the fault. If DTC P1514 cannot be duplicated, the
information included in the Failure Records data can
be useful in vehicle mileage since the DTC was last
set.

If it is determined that the DTC occurs intermittently,
performing the DTC P1514 Diagnostic Chart may
isolate the cause of the fault.

DTC P1514 - TPS-MAF Correlation Error

 

Step

Action

Value(s)

Yes

No

1

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

—

Go to

 Step 2

Go to

 OBD

System

Check

2

Was the “Electric Throttle Control (ETC) System
Check” performed?

—

Go to 

Step 3

Go to 

ETC

System

Check

3

1. 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 P1514.

Does the Tech 2 indicate DTC P1514 failed this
ignition?

—

Go to

 Step 4

Refer to

Diagnostic

Aids

4

1.  Start the engine.
2.  With the engine idling, monitor “MAF Frequency”

display on the Tech 2.

Is the “MAF Frequency” below the specified value?

6 

∼

 10 g/s

Go to

 Step 5

Go to

 Step 8

5

1.  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?

0g/s

Go to

 Step 6

Go to

 Step 7

6

Replace the MAF sensor.

Is the action complete?

—

Verify repair

Go to

 Step 9

7

1. 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 repair

Go to

 Step 7

8

1. 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 a “MAF Frequency” at the
specified value?

6 

∼

 10 g/s

Go to

 Step 6

Go to

 Step 9

9

1. Ignition“ON”, engine not running.
2. Observe the MAP reading on the Tech 2.

Is the MAP reading less than the specified value?

65kPa

Go to

 Step 10

Go to

 Step 13

SECTION

6E–366

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

DTC P1514 - TPS-MAF Correlation Error

  (Cont'd)

Step

No

Yes

Value(s)

Action

10

1. Disconnect the MAP sensor.
2. Connect a test 5 volt reference circuit and the MAP

signal at the MAP sensor harness connector.

3. Observe the MAP reading on the Tech 2.

Is the MAP reading less than the specified value? (If no,
start with diagnosis chart for other sensors in the circuit
and see if 5Vreturns.)

—

Go to

 Step 12

Go to

 Step 11

11

1. Check the MAP signal circuit between the PCM and

MAP ground circuit.

2. If the MAP signal circuit is open or shorted, repair it

as necessary.

Was the MAP signal circuit open or shorted?

—

Verify repair

Go to

 Step 13

12

Replace the MAP sensor.

Is the action complete?

—

Verify repair

—

13

Observe the TP angle reading on the Tech 2 while
slowly opening the throttle.

Does the TP angle increase steadily and evenly from
the closed throttle value to the wide open throttle
value?

Closed

throttle TP

sensor 1 =8 

∼

10 % TP

sensor 2 =90

∼

 92 % Wide

open throttle

TP sensor 1

=90 

∼

 92 %

TP sensor 2

=8 

∼

 10 %

Refer to

Diagnostic

Aids

Go to

 Step 14

14

1. Disconnect the TP sensor.
2. Observe the TP sensor reading on the Tech2.

Is the TP sensor reading near the specified value?

0V

Go to

 Step 15

Go to

 Step 16

15

1. Connect a test light between the 5Volt reference

circuit and the TP1 and TP2 sensor signal circuit  at
the TP sensor harness connector.

2. Observe the TP sensor reading on the Tech2.

Is the TP sensor reading near the specified value?

5V

Go to

 Step 18

Go to

 Step 17

16

Check the following items;

1. TP1 and TP2 signal circuit for a short to voltage.
2. TP1 and TP2 sensor ground circuit for high

resistance between the PCM and the TP sensor.

3. TP1 and TP2  sensor ground circuit for a poor

connection.

4. If a problem is found, repair wiring harness as

necessary.

Was a problem found?

—

Verify repair

Go to

 Step 19

SECTION