Dacia SuperNova (engine E7J). Service manual — part 38

E7J-A-2/60 ENGINE

17

IGNITION AND INJECTION

17 - 62

DIAGNOSING-INTERPRETING THE STATES

PARAMETER

COLLECTOR PRESSURE
ATMOSPHERIC PRESSURE

Check the insulation, the continuity and the absence of contact
resistance along the circuits:
pin 15 of calculator

♦

pin A of atmospheric pressure sensor

pin 16 of calculator

♦

pin B of atmospheric pressure sensor

pin 78 of calculator

♦

pin C of atmospheric pressure sensor.

Remedy if necessary.
If all the above are correct, replace the atmospheric pressure
sensor

SUGGESTIONS

No defect should be present or memorized

Collector pressure not
re a l a fter se tting
contact.
Collector pressure <
Min. in idle mode.
Atmospheric pressure
not real

Check:
- watertightness of tube between the atmospheric pressure sensor
and the intake collector
- adjustment of rocker-arms
- canister draining valve, which should be closed in idle mood
- cylinder compression, controlled with “CLIP TEHNIC”

If all the above are correct, replace the atmospheric pressure sen-
sor

Collector pressure <
Max. in idle mode.

Perform again the conformity test.

AFTER REPAIR

E7J-A-2/60 ENGINE

17

IGNITION AND INJECTION

17 - 63

DIAGNOSING-INTERPRETING THE STATES

PARAMETER

DETONATION SIGNAL

SUGGESTIONS

No defect should be present or memorized

The detonation sensor should generate a signal, the amplitude of which must differ from 0,
a proof of the fact that it perceives the mechanical vibrations of the engine.
If the signal = 0:
- check if the sensor is well fixed
- check the insulation and continuity of cabling along the circuits:

pin 20 of calculator

♦

pin 1 of detonation sensor

pin 79 of calculator

♦

pin 2 of detonation sensor

pin 19 of calculator

♦

pin 1 of detonation sensor screening.

Replace detonation sensor if necessary.

AFTER REPAIR

PARAMETER

ADAPTATION OF ENRICHMENT WHILE RUNNING
ADAPTATION OF ENRICHMENT IN IDLE MODE

SUGGESTIONS

No defect should be present or memorized.
Do initialization.

Make sure the canister draining valve is watertight.

Erase memory of the injection calculator.
With the engine hot, in the stage of the idle mode adjustment, watch these parameters and
notice:
- if one of the parameters drifts to the MAX limit, then there is no enough petrol
- if one of the parameters drifts to the MIN limit, then there is too much petrol.

Ensure the cleanness and the good functioning of:
- petrol filter
- petrol pump
- petrol supply circuit
- petrol tank.

AFTER REPAIR

Perform again the conformity test.

Perform again the conformity test

E7J-A-2/60 ENGINE

17

IGNITION AND INJECTION

17 - 64

COMMAND

PETROL TANK

SUGGESTIONS

No defect should be present or memorized

Check that the shock sensor has the inner contact shut.
Push in order to perform the closing of the shock sensor, if necessary.

Check, while the injection calculator commands the petrol pump, the presence of 12V at
pin 3 of the shock sensor.
If there is no 12V at pin 3 of the sensor, then remedy the circuit between pin 3 of sensor
and pole 5 of petrol pump relay.

Check the continuity between pin 1 and pin 3 of shock sensor.
If necessary, replace shock sensor.

Check the integrity of the cabling and the presence of mass at pin A1 of the connector on
the cap of the petrol tank.

Check the insulation and the continuity of the cabling along the supply circuit +12V:
-pin 1 shock sensor

♦

pin B1 petrol tank connector.

Remedy if necessary.

If the incident persists, replace petrol pump.

AFTER REPAIR

Perform again the conformity test

DIAGNOSING-INTERPRETING THE STATES

E7J-A-2/60 ENGINE

17

IGNITION AND INJECTION

17 - 65

DIAGNOSING-INTERPRETING THE STATES

LOW SPEED VENTILATOR
HIGH SPEED VENTILATOR

No defect should be present or memorized

COMMAND

SUGGESTIONS

Check the insulation and the continuity of the cabling along the
circuit to pin 8 of calculator.
Remedy if necessary.

If the incident persists, check on the basis of the electrical schema:
- the supply of the ventilator (700) and of the GMV ventilator
- the connection to the mass of the GMV ventilator
- the state of the GMV (700) relay
- the state of the fuse (321) located between the relay 700 and the
GMV ventilator
- the state of the GMV ventilator.
Remedy if necessary.

The ventilator does
not turn at low speed

The ventilator does
not turn at high speed

Check the insulation and the continuity of the cabling along the
circuit to pin 38 of calculator.
Remedy if necessary.

If the incident persists, check on the basis of the electrical schema:
-the supply of the ventilator (234) and of the GMV ventilator
-the connection to the mass of the GMV ventilator
-the state of the GMV (234) relay
-the state of the GMV ventilator.
Remedy if necessary.

AFTER REPAIR

Perform again the conformity test.