Opel Frontera UBS. Manual - part 493

6E–102

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

DTC P0202 – Injector # 2 Circuit 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

Will the engine start?

—

Go to 

Step 3

Go to 

Engine

Cranks But

Will Not Run

chart

3

1. Install the Tech 2.  Clear the DTC.
2. Idle the engine for one minute.

Does DTC P0202 reset?

—

Go to 

Step 5

Go to 

Step 4

4

1. Review the Freeze Frame data with the ignition

“ON” and the engine “OFF” and note the
parameters.

2. Operate the vehicle within the Freeze Frame

conditions as noted.

Does P0202 reset?

—

Go to 

Step 5

—

5

Check the Injector test.

Does the working noise confirm?

—

Go to 

Step 6

Go to 

Step 7

6

1. Install the Tech 2. Clear the DTC.
2. Idle the engine for one minute.

Dose DTC P0202 reset?

—

Verify repair

Go to 

Step 7

7

Check for an open circuit between the injector
connector and the ECM.

Was there an open circuit?

—

Go to 

Step 8

Go to 

Step 9

8

Repair the open circuit.

Is the action complete?

—

Verify repair

—

9

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

Is the action complete?

—

Verify repair

Go to 

Step 10

10

Replace the Injector (Refer to the Injector Group Sign
Programming).

Is the action complete?

—

Verify repair

—

6E–103

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

Diagnostic Trouble Code (DTC) P0203 (Flash DTC 52)

 Injector # 3 Circuit Fault

060RW134

Circuit Description

The Engine Control Module ECM has four individual
injector driver circuits.  Each controls an injector.  When
the driver circuit is grounded by the ECM, the injector is
activated.  The ECM monitors the current in each driver
circuit.  The voltage on each driver is monitored to detect
a fault.  If the voltage is not what the ECM expects to
monitor on the circuit, a DTC is set.  This DTC is also set if
an injector driver is shorted to voltage or if there is an open
circuit.

Action Taken When the DTC Sets

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 P0203 can be cleared by using the Tech 2 “Clear
Info” function or by disconnecting the ECM battery
feed.

Diagnostic Aids

An injector driver circuit that is open or shorted to voltage
will cause a DTC P0203 to set.

Test Description

The number(s) below refer to the step number(s) on the
Diagnostic Chart.

3. This step determines if DTC P0203 is the result of a

hard failure or an intermittent condition.

Injector Test

This test is conducted to make it sure that appropriate
electric signals are being sent to injectors Nos. 1–4.
Tech–2 must be used for this test.

Test Procedure:

1.

Connect Tech–2 to the vehicle DLC.

2.

Set Ignition Switch to the “ON” position.

3.

Select Control Test.

4.

Select Injector Test.

5.

Send instructions to each injector (Switch on),
making sure of injector working noise.

NOTE: If injector working noise (Clink) can hardly be
confirmed, remove the engine head cover noise
insulation.

Refer to Section 6A.

6.

In the injector whose working noise has been
confirmed, its electric circuit can be regarded as
normal.

As for the injector whose working noise has not
been confirmed, its electric circuit or the injector
proper is faulty.

6E–104

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

DTC P0203 – Injector # 3 Circuit 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

Will the engine start?

—

Go to 

Step 3

Go to 

Engine

Cranks But

Will Not Run

chart

3

1. Install the Tech 2.  Clear the DTC.
2. Idle the engine for one minute.

Does DTC P0203 reset?

—

Go to 

Step 5

Go to 

Step 4

4

1. Review the Freeze Frame data with the ignition

“ON” and the engine “OFF” and note the
parameters.

2. Operate the vehicle within the Freeze Frame

conditions as noted.

Does P0203 reset?

—

Go to 

Step 5

—

5

Check the Injector test.

Does the working noise confirm?

—

Go to 

Step 6

Go to 

Step 7

6

1. Install the Tech 2. Clear the DTC.
2. Idle the engine for one minute.

Dose DTC P0203 reset?

—

Verify repair

Go to 

Step 7

7

Check for an open circuit between the injector
connector and the ECM.

Was there an open circuit?

—

Go to 

Step 8

Go to 

Step 9

8

Repair the open circuit.

Is the action complete?

—

Verify repair

—

9

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

Is the action complete?

—

Verify repair

Go to 

Step 10

10

Replace the Injector (Refer to the Injector Group Sign
Programming).

Is the action complete?

—

Verify repair

—

6E–105

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

Diagnostic Trouble Code (DTC) P0204 (Flash DTC 54)

 Injector # 4 Circuit Fault

060RW134

Circuit Description

The Engine Control Module ECM has four individual
injector driver circuits.  Each controls an injector.  When
the driver circuit is grounded by the ECM, the injector is
activated.  The ECM monitors the current in each driver
circuit.  The voltage on each driver is monitored to detect
a fault.  If the voltage is not what the ECM expects to
monitor on the circuit, a DTC is set.  This DTC is also set if
an injector driver is shorted to voltage or if there is an open
circuit.

Action Taken When the DTC Sets

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 P0204 can be cleared by using the Tech 2 “Clear
Info” function or by disconnecting the ECM battery
feed.

Diagnostic Aids

An injector driver circuit that is open or shorted to voltage
will cause a DTC P0204 to set.

Test Description

The number(s) below refer to the step number(s) on the
Diagnostic Chart.

3. This step determines if DTC P0204 is the result of a

hard failure or an intermittent condition.

Injector Test

This test is conducted to make it sure that appropriate
electric signals are being sent to injectors Nos. 1–4.
Tech–2 must be used for this test.

Test Procedure:

1.

Connect Tech–2 to the vehicle DLC.

2.

Set Ignition Switch to the “ON” position.

3.

Select Control Test.

4.

Select Injector Test.

5.

Send instructions to each injector (Switch on),
making sure of injector working noise.

NOTE: If injector working noise (Clink) can hardly be
confirmed, remove the engine head cover noise
insulation.

Refer to Section 6A.

6.

In the injector whose working noise has been
confirmed, its electric circuit can be regarded as
normal.

As for the injector whose working noise has not
been confirmed, its electric circuit or the injector
proper is faulty.