Opel Frontera UE. Manual - part 836

 

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Opel Frontera UE. Manual - part 836

 

 

6E1–227

X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DTC P1404 EGR Closed Valve

  (Cont'd)

Step

No

Yes

Value(s)

Action

9

1. Ignition ON, engine OFF.
2. Using a Digital Voltmeter (DVM), check for voltage

on the 5 volt Reference signal circuit at the Linear
Exhaust Gas Recirculation (EGR) Valve wiring
harness connector.

Does the DVM read the following value?

about 5 volts

Go to Step 11

Go to Step 10

10

Check the 5 volt reference signal circuit, between the
EGR and the ECM, for the following conditions:

D

An Open circuit

D

A short to ground

Was the problem found?

Verify repair

Go to Step 11

11

1. Ignition OFF.
2. Place a DVM between the 5 volt reference signal

circuit and the 5 volt signal return (ground) circuit at
the EGR wiring harness connector.

3. Ignition ON, Engine OFF.

Does the DVM read the following value?

about 5 volts

Go to Step 13

Go to Step 12

12

Check the 5 volt signal return (ground) circuit, between
the EGR and the ECM, for the following conditions:

D

An Open circuit

D

A short to ground

Was the problem found?

Verify repair

Go to Step 15

13

1. Ignition OFF.
2. Place a fused jumper wire between the 5 volt

reference signal circuit and the EGR valve position
feedback circuit at the EGR wiring harness
connector.

3. Ignition ON, Engine OFF.
4. Observe the EGR value on the Tech 2.

Does the Tech 2 display the following value?

5 volts 100%

Go to Step 14

Go to Step 15

14

Replace the Linear Exhaust Gas Recirculation (EGR)
Value.
Verify repair.

15

Replace the ECM.
Verify repair.

6E1–228

X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DIAGNOSTIC TROUBLE CODE (DTC) P1625 ECM UNEXPECTED RESET

014RX002

Circuit Description

The engine control module (ECM) monitors unexpected
ECM reset. This will not turn on MIL light on, only records
code DTC P1625.

Conditions for Setting the DTC

D

Clock or COP (Computer Operating Properly) reset.

Action Taken When the DTC Sets

D

The ECM will not illuminate the malfunction indicator
lamp (MIL).

D

The ECM will store conditions which were present
when the DTC was set as Failure Records only. This
information will not be stored as Freeze Frame data.

Conditions for Clearing the DTC

D

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

D

A history DTC P1625 will clear after 40 consecutive
warm-up cycles have occurred without a fault.

D

DTC P1625 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:

D

P1625 alone stored does not need diagnosis. Clear
DTC code.

NOTE: DTC  P1625 is a DTC to record a ECM reset
history. If DTC P1625 is not reset and no engine
abnormality is found after clearance of DTC, it  is not
necessary to do any farther processing.

6E1–229

X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DTC P1625–ECM Unexpected Reset

 

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 is “On”.
2. Install the Tech 2.
3. Start the engine at let it Idle.
4. On the Tech 2, select “DTC info”.

Does the Tech 2 indicate DTC P1625 failed?

Go to Step 3 

Go to

Diagnostic

Aids

3

1. Ignition is “On”.
2. Clear DTC P1625 by using the Tech 2 “Clear Info”.
3. Start the engine at let it Idle.
4. On the Tech 2, select “DTC info”.

Does the Tech 2 indicate DTC P1625 failed?

Go to Step 4

Go to

Diagnostic

Aids

4

1. Check for aftermarket electronics, such as

transceiver stereos, and anti theft devices, they
may radiate EMI into the control system if they are
improperly installed. (This  may cause a false
sensor reading and turn on the MIL.)

2. If a problem is found, repair as necessary.

Was the problem found?

Verify repair

6E1–230

X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DIAGNOSTIC TROUBLE CODE (DTC) P1627 PCM A/D CONVERSION

MALFUNCTION

014RX002

Circuit Description

The Engine Control Module (ECM) monitors the 5 volt
reference signal when the Ignition is ON. If the ECM
senses an Analog to Digital (A/D) conversion error within
the ECM, then DTC P1627 will set. DTC P1627 is a type A
code.

Conditions for Setting the DTC

D

Engine is running.

D

Any A/D DTC’s set.

Action Taken When the DTC Sets

D

The ECM will illuminate the Malfunction Indicator Lamp
(MIL) the first time the fault is detected.

D

The ECM will store the conditions that were present
when the DTC was set as Freeze Frame and in Failure
Records.

Conditions for Clearing the MIL/DTC

D

The ECM will turn OFF the MIL on the third consecutive
trip without a reported failure.

D

A History DTC will clear after 40 consecutive trips
without a reported failure.

D

The DTC can be cleared using the Scan Tool’s ”Clear
Info” function.

Diagnostic Aids

D

Poor connections, or a damaged harness – Inspect the
harness connectors for: backed–out terminals,
improper mating or damaged terminals. Also, check for
open circuits, shorts to ground, and shorts to voltage.

 

 

 

 

 

 

 

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