Dacia SuperNova (engine E7J). Service manual — part 28

E7J-A-2/60 ENGINE

17

IGNITION AND INJECTION

17 - 22

DIAGNOSING-INTERPRETING THE DEFECTS

CIRCUIT OF COMMAND PETROL PUMP
1. Open circuit or short-circuit to the mass of the circuit towards pin

68 of the calculator

2. Short-circuit at 12V along the circuit towards pin 68 of the calculator

DEFECT
PRESENT

SUGGESTIONS

Conditions of breakdown detection by the calculator:

-take the contact and wait till dialogue with the tester is lost
-put the contact and enter dialogue.
Condition of performing the diagnosing:
-defect is present.
REMARK: This defect has priority and should be dealt with before
the following ones.

Check the connection and the state of the 236 petrol pump connector.
Change connector if necessary.

Check, after setting the contact, the presence of +12V at the pole 1 of 236 petrol pump.
Remedy if necessary.

Connect the 90-way terminal-tester instead of the calculator and check the insulation
and the continuity along the circuit:
pin 68 of calculator

♦

pole 2 of the 236 petrol pump.

Remedy if necessary.

Check the coil of the 236 petrol pump.
Remedy if necessary.

The problem is not yet solved! Consequently, the injection calculator must be changed.
CAUTION! The destruction of the calculator has probably been caused by an

electric shock.

The cause of the destruction must be found before mounting a new
calculator.

AFTER
REPAIR

Erase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.

5.

E7J-A-2/60 ENGINE

17

IGNITION AND INJECTION

17 - 23

DIAGNOSING-INTERPRETING THE DEFECTS

DEFECT
PRESENT OR
MEMORIZED

CYLINDER 1 - INJECTOR CIRCUIT

1. Short-circuit at 12 V along the way to the pin 59 of the calcula-

tor (injector command)

2. Short-circuit to the mass along the way to pin 59 of the calcula-

tor (injector command)

3. Open circuit along the way to the pin 59 of the calculator (injec
tor command)

SUGGESTIONS

Conditions of breakdown detection by the calculator:

-the engine is started
Condition of performing the diagnosing:
-defect is present
-the defect has been memorized but is recorded in the “present” state.

6.

Check the resistance of injector 1.
Change injector if necessary.

Check, after setting the contact, the presence of 12V at the pin 1 of injector 1.
Remedy, if necessary, the circuit up to the 238 actuating relay.

Connect the 90-way terminal-tester instead of the calculator and check the insulation
and the continuity along the circuit:
pin 59 of calculator

♦

pin 2 of injector 1.

Remedy if necessary.

The problem is not yet solved! Consequently, the injection calculator must be changed.
CAUTION! The destruction of the calculator has probably been caused by an

electric shock.
The cause of the destruction must be found before mounting a new

calculator.

AFTER REPAIR

Erase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.

E7J-A-2/60 ENGINE

17

IGNITION AND INJECTION

17 - 24

DIAGNOSING-INTERPRETING THE DEFECTS

DEFECT
PRESENT OR
MEMORIZED

CYLINDER 2 - INJECTOR CIRCUIT

1. Short-circuit at 12 V along the way to the pin 90 of the calculator

(injector command)

2. Short-circuit to the mass along the way to pin 90 of the calculator

(injector command)

3. Open circuit along the way to the pin 90 of the calculator (injector

command)

Conditions of breakdown detection by the calculator:

-the engine is started
Condition of performing the diagnosing:
-defect is present
-the defect has been memorized but is recorded in the “present” state.

SUGGESTIONS

Check the resistance of injector 2.
Change injector if necessary.

Check, after setting the contact, the presence of 12V at the pin 1 of injector 2.
Remedy, if necessary, the circuit up to the 238 actuating relay.

Connect the 90-way terminal-tester instead of the calculator and check the insulation and
the continuity along the circuit:
pin 90 of calculator

♦ pin 2 of injector 2.

Remedy if necessary.

The problem is not yet solved! Consequently, the injection calculator must be changed.
CAUTION! The destruction of the calculator has probably been caused by an
electric shock.

The cause of the destruction must be found before mounting a new

calculator.

Erase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.

AFTER REPAIR

7.

E7J-A-2/60 ENGINE

17

IGNITION AND INJECTION

17 - 25

DIAGNOSING-INTERPRETING THE DEFECTS

DEFECT
PRESENT OR
MEMORIZED

CYLINDER 3 - INJECTOR CIRCUIT

1. Short-circuit at 12 V along the way to the pin 60 of the calculator

(injector command)

2. Short-circuit to the mass along the way to pin 60 of the calculator

(injector command)

3. Open circuit along the way to the pin 60 of the calculator
(injector command)

SUGGESTIONS

Conditions of breakdown detection by the calculator:

-the engine is started
Condition of performing the diagnosing:
-defect is present
-the defect has been memorized but is recorded in the “present” state.

Check the resistance of injector 3.
Change injector if necessary.

Check, after setting the contact, the presence of 12V at the pin 1 of injector 3.
Remedy, if necessary, the circuit up to the 238 actuating relay.

Connect the 90-way terminal-tester instead of the calculator and check the insulation and
the continuity along the circuit:
pin 60 of calculator

♦ pin 2 of injector 3.

Remedy if necessary.

The problem is not yet solved! Consequently, the injection calculator must be changed.
CAUTION! The destruction of the calculator has probably been caused by an
electric shock.

The cause of the destruction must be found before mounting a new
calculator.

AFTER REPAIR

Erase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.

8.