Opel Frontera UE. Manual - part 233

 

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Opel Frontera UE. Manual - part 233

 

 

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.

6E1–231

X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DTC P1627  PCM A/D Conversion Malfunction

 

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.
2. Review and record Tech 2 Failure Records data,

then clear the DTCs.

3. Operate the vehicle within the Failure Records

conditions as noted.

4. Using the Tech 2, monitor ”DTC” info for DTC

P1627.

Does the Tech 2 indicate DTC P1627 ”Ran and
Passed?”

Refer to

Diagnostic

Aids 

Go to Step 3 

3

Check the suspect 5 volt reference circuit(s) for the
following conditions:

D

A short to ground

D

An open circuit

D

A short to voltage

Was the problem found?

Verify repair

Go to Step 4 

4

Replace the ECM.

6E1–232

X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DIAGNOSTIC TROUBLE CODE (DTC) P1635 5 VOLT REFERENCE VOLTAGE

CIRCUIT MALFUNCTION

014RX002

Circuit Description

The Engine Control Module (ECM) monitors the 5 volt
reference signal when the Ignition is ON. If the ECM
senses the 5 volt reference signal circuit is above 5.12
volts or below 4.88 volts, then DTC P1635 will set. DTC
P1635 is a type A code.

Conditions for Setting the DTC

D

Ignition voltage is greater than 6.3 volts.

D

Engine is running.

The above mentioned conditions are met and  one of the
following two conditions are met for 5 seconds within a 10
second test sample:

D

ECM senses the 5 volt reference signal circuit is above
5.12 volts.

OR

D

ECM senses the 5 volt reference signal circuit is below
4.88 volts.

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

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.

6E1–233

X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DTC P1635  5 Volt Reference Voltage Circuit Malfunction

 

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.
2. Review and record Tech 2 Failure Records data,

then clear the DTCs.

3. Operate the vehicle within the Failure Records

conditions as noted.

4. Using the Tech 2, monitor ”DTC” info for DTC

P1635.

Does the Tech 2 indicate DTC P1635 ”Ran and
Passed?”

Refer to

Diagnostic

Aids 

Go to Step 3 

3

Check the suspect 5 volt reference circuit(s) for the
following conditions:

D

A short to ground

D

An open circuit

D

A short to voltage

Was the problem found?

Verify repair

Go to Step 4 

4

Replace the ECM.

 

 

 

 

 

 

 

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