Opel Frontera UBS. Manual - part 2463

6E–166

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

Diagnostic Trouble Code (DTC) P0650 (Flash DTC 77) 

Check Engine Lamp Circuit Open/Short

060RW136

Circuit Description

The check engine lamp circuit receives through Meter
10A fuse the battery, current flowing in the order of Meter
and check engine lamp.

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 conditions which were present
when the DTC was set as Freeze Frame and in the
Failure Records data.

Conditions for Clearing the MIL/DTC

D

DTC P0650 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

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.

D

Damaged harness – Inspect the wiring harness for
damage.  If the harness appears to be OK, observe the
lamp test display on the Tech 2 while moving
connectors and wiring harnesses related to the check
engine lamp.  A change in the display will indicate the
location of the fault.

If the Tech 2 indicate DTCs P0650 and P0381, check the
meter circuit necessarily.

6E–167

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

DTC P0650 – Check Engine Lamp Open/Short

 

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. Observe the “Lamp Test” display on the Tech 2.

Is the “Lamp Test” operating?

—

Refer to

Diagnostic

Aids

Go to 

Step 3

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 the “DTC” info for DTC

P0650.

5. If the Tech 2 indicate DTCs P0650 and P0381,

check the meter circuit necessarily.

Does the Tech 2 indicate DTC P0650 failed?

—

Go to 

Step 4

Refer to

Diagnostic

Aids

4

Check the Check Engine Lamp circuit for a poor
connection at the Meter and replace the bulb if
necessary.

Did the bulb require replacement?

—

Verify repair

Go to 

Step 5

5

Using the Tech 2.

Does the Tech 2 indicate DTC P0650 failed?

—

Go to 

Step 6

—

6

Check the Meter circuit for a poor connection.

Did the Meter require repair?

—

Verify repair

Go to 

Step 7

7

Replace the ECM (Refer to the Data Programming in
Case of ECM change).

Is the action complete?

—

Verify repair

—

6E–168

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

Diagnostic Trouble Code (DTC) P0654 (Flash DTC 27)

 Tachometer Circuit Open/Short

060RW136

Circuit Description

The Tach Meter circuit receives through Meter 10A fuse
from the battery, current flowing in the order of Mater and
the Tach Meter.

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 conditions which were present
when the DTC was set as Freeze Frame and in the
Failure Records data.

Conditions for Clearing the MIL/DTC

D

DTC P0650 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

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.

D

Damaged harness – Inspect the wiring harness for
damage.

D

If the Tech 2 indicat DTCs 0654, P0650 and P0381,
Check the meter circuit necessarily.

6E–169

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

DTC P0654 – Tachometer Circuit Open/Short

 

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.
3. Operate the vehicle within Failure Records

conditions as noted.

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

P654.

Does the Tech 2 indicate DTC P0654 failed?

—

Go to 

Step 3

Refer to

Diagnostic

Aids

3

Check the Tach meter circuit for a poor connection at
the Meter and replace the terminal if necessary.

Did the terminal require replacement?

—

Verify repair

Go to 

Step 4

4

Using the Tech 2.

Does the Tech 2 indicate DTC P0654 failed?

—

Verify repair

Go to 

Step 5

5

Check the Tach Meter circuit for a poor connection.

Did the terminal require replacement?

—

Verify repair

Go to 

Step 6

6

Replace the tachometer.

Is the action complete?

—

Verify repair

Go to 

Step 7

7

Replace the ECM (Refer to the Data Programming in
Case of ECM change).

Is the action complete?

—

Verify repair

—