Dacia SuperNova (engine E7J). Service manual — part 33

E7J-A-2/60 ENGINE

17

IGNITION AND INJECTION

17 - 42

DIAGNOSING-INTERPRETING THE DEFECTS

WATER TEMPERATURE ALERT CIRCUIT
1. Open circuit or short-circuit to mass of the way to pin 9 of the

calculator

2. Short-circuit at 12 V along the way to pin 9 of the calculator.

DEFECT

PRESENTOR

MEMORIZED

Condition of breakdown detection by the calculator:
-start the engine and keep it at over 1500 rot/min for at least 10 sec-
onds.
Conditions of performing the diagnosing:
-the defect is present
-the defect has been memorized but is recorded in the “present” state.

SUGGESTIONS

26.

Check the

connection and the condition of the connectors along the circuit:

pin 9 of calculator -> water temperature alert light indicator (on board).

Change connectors if necessary.

Check the condition of water temperature alert light indicator on board. On setting the
contact, it must flash for 3 seconds, then it turns off.
Remedy if necessary.

Check if the electric bulb

of the water temperature alert light

indicator

has 12 V, after

setting the contact.
Remedy if necessary.

Connect the 90-way terminal-tester instead of the calculator and check the insulation
and the continuity along the circuit:
pin 9 of calculator -> water temperature alert light indicator (on board)..
Remedy if necessary.

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

AFTER REPAIR

E7J-A-2/60 ENGINE

17

IGNITION AND INJECTION

17 - 43

DIAGNOSING-INTERPRETING THE DEFECTS

LOW SPEED VENTILATOR RELAY COMMAND CIRCUIT
(for A.C. cars)
1. Open circuit or short-circuit to mass of the way to pin 8 of the calcu-

lator

2. Short-circuit at 12 V along the way to pin 8 of the calculator.

DEFECT
PRESENT

27.

Conditions of breakdown detection by the calculator:
-take the contact and wait for the dialogue with the tester to be lost
-set the contact and enter dialogue.
Condition of performing the diagnosing:
-defect is present
Note: this defect has to be correlated with the diagnosing of the water
temperature sensor circuit and the air-conditioning installation.

SUGGESTIONS

Check the connection and the condition of the low-speed 700 ventilator connector
Change the connector if necessary.

Check, after setting contact, the presence of +12 V at pole 1 of the 700 relay.
Remedy it if necessary.

Connect the 90-way terminal-tester instead of the calculator and check the insulation
and the continuity along the circuit:
pin 8 of calculator

♦

pole 2 of the low-speed 700 ventilator relay.

Remedy if necessary.

Check the coil of the low-speed 700 ventilator relay.
Change relay 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 - 44

DIAGNOSING-INTERPRETING THE DEFECTS

HIGH SPEED VENTILATOR RELAY COMMAND CIRCUIT
(for A.C. cars)
1. Open circuit or short-circuit to mass of the way to pin 38 of the

calculator

2. Short-circuit at 12 V along the way to pin 38 of the calculator.

DEFECT
PRESENT

Conditions of breakdown detection by the calculator:
-take the contact and wait for the dialogue with the tester to be lost
-set the contact and enter dialogue.
Condition of performing the diagnosing:
-the defect is present
Note: this defect has to be correlated with the diagnosing of the water
temperature sensor circuit and the air-conditioning installation.

SUGGESTIONS

Check the connection and the condition of the high-speed 234 ventilator connector

Change the connector if necessary.

Check, after setting contact, the presence of +12 V at pole 1 of the 234 relay.
Remedy it if necessary.

Connect the 90-way terminal-tester instead of the calculator and check the insulation
and the continuity along the circuit:
pin 38 of calculator

®

pole 2 of the low-speed 234 ventilator relay.

Remedy if necessary.

Check the coil of the low-speed 234 ventilator relay.
Change relay 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

28.

E7J-A-2/60 ENGINE

17

IGNITION AND INJECTION

17 - 45

DIAGNOSING-INTERPRETING THE DEFECTS

VENTILATOR RELAY COMMAND CIRCUIT
(for cars having no A.C.)
1. Open circuit or short-circuit to mass of the way to pin 8 of the

calculator

2. Short-circuit at 12 V along the way to pin 8 of the calculator.

DEFECT
PRESENT

29.

Conditions of breakdown detection by the calculator:
-take the contact and wait for the dialogue with the tester to be lost
-set the contact and enter dialogue.
Condition of performing the diagnosing:
-the defect is present
Note: this defect has to be correlated with the diagnosing of the water
temperature sensor circuit.

SUGGESTIONS

Check the connection and the condition of the connector of the 234 cooling ventilator

relay.

Change the connector if necessary.

Check, after setting contact, the presence of +12 V at pole 1 of the 234 relay.
Remedy it if necessary.

Connect the 90-way terminal-tester instead of the calculator and check the insulation
and the continuity along the circuit:
pin 8 of calculator

♦

pole 2 of the 234 cooling ventilator relay.

Remedy if necessary.

Check the coil of the

234 cooling ventilator relay.

Change the relay 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