2004 DACIA SUPERNOVA sensor

E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 31
DIAG
NOSING-INTERPRETING THE DEFECTS
DEFECT
PRESENTOR
MEMO RIZEDTHE ATMOSPHERIC PRESSURE CIRCUIT
1. Pressure defect of the intake collector.
Conditions of breakdown detection by the calculator:
-the contact is taken, wait for the dialogue with the calculator to be
lost, then resume the dialogue with the calculator.
-run the engine and maintain it at a rotation ration greater than 600
ro t/min for at least 10 seconds.
Conditions of performing the diagnosing:
-defec t is present
-the defect has been memorized but is recorded in the “present” state.
SU G GESTIO N S
If the defect is only present when the engine runs, check the correctness of the clapper
po sition parameters when the acceleration pedal is free, and when it is fully pressed.
Gently press the acceleration pedal (all the way) and check whether the position of the
clapper is co nstantly increasing.
If it is not so, the information is not correct. Treat the diagnose of the clapper potentiometer.
Check the atmospheric pressure sensor.
Remedy atmospheric pressure sensor if necessary.
Check the correct connecting and the condition of the linking tube between the sensor and
the intake gallery.
Connect the 90-way terminal-tester instead of the calculator and check the insulation, the
co ntinuity and the absence of contact resistance along the circuits:
pin 16 of calculator
♦ pin B of the atmospheric pressure sensor
pin 15 of calculator
♦ pin A of the atmospheric pressure sensor
pin 78 of calculator
♦ pin C of the atmospheric pressure sensor.
Remedy if necessary.
Change the atmospheric pressure sensor if the incident persists.
The proble m 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
calcul ator.
15.
Erase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.
AFTER REPA IR
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 34
DIAG
NOSING-INTERPRETING THE DEFECTS
DEFECT
PRESENTOR
MEMO RIZEDWATER TEMPERATURE SENSOR CIRCUIT
Breakdown of water temperature sensor
Conditions of breakdown detection by the calculator:
-se t the contact
-if the defect is only memorized, start the engine and keep it run till
the first start of the cooling engine ventilator.
Conditions of performing the diagnosing:
-the defe ct is present
-the defect has been memorized but is recorded in the “present” state.
S UGESTIONS
Check the connection and the state of the water temperature sensor
Change the connector if necessary.
Check that the resistance of the water temperature sensor is not 0 or “infinite” (i.e. certain
breakdown of the sensor).
Change the sensor if necessary.
Connect the 90-way terminal-tester instead of the calculator and check the insulation,
the continuity and the absence of contact resistance along the circuits:
pin 73 of calculator
♦ pin B1 of th e water temperature sensor
pin 13 of calculator
♦ pin B2 of th e water temperature sensor.
Remedy if necessary.
Check that the alteration of the resistance of the sensor for various temperatures is in
ke eping with its variation curve.
Change the sensor 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
calcul ator.
Erase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.
AFTER REPAIR
18.
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 35
DIAG
NOSING-INTERPRETING THE DEFECTS
AIR TEMPERATURE SENSOR CIRCUIT
Breakdown of air temperature sensorDEFECT
PR ESENTOR
MEMO RIZED
Conditions of breakdown detection by the calculator:
-se t the contact
-if the defect is only memorized, start the engine and keep it run till
the first start of the cooling engine ventilator.
Conditions of performing the diagnosing:
-defec t is present
-the defect has been memorized but is r ecorded in the “present” state.
SUGGESTIONS
Check the connection and the condition of the air temperature sensor
Change the connector if necessary.
Check that its resistance is not 0 (i..e. certain breakdown).
Remedy the sensor if necessary.
Connect the 90-way terminal-tester instead of the calculator and check the insulation,
the continuity and the absence of contact resistance along the circuits:
pin 77 of calculator
♦ pin 2 of air te mperature sensor
pin 49 of calculator
♦ pin 1 of ai r temperatur e sen sor.
Remedy if necessary.
Check that the alteration of the resistance of the air temperature sensor for various tem-
per atures is in keeping with its variation curve.
The prob lem 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
calcul ator.
Erase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.AFTER REPAIR
19.
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 39
DIAG
NOSING-INTERPRETING THE DEFECTS
DETONATION SENSOR CIRCUIT
Breakdown of detonation signalDEFECT
PR ESENT OR
MEMORI ZED23.
Condition of breakdown detection by the calculator:
-do a route-test, with the engine heated and under high rotation
ra tio.
Condition of performing the diagnosing:
-the defe ct is present
-the defect has been memorized but is re corded in the “present” state.
SUGGESTIONS
Check the connection and the condition of the detonation sensor
Change the connector if necessary.
Check the mounting of the detonation sensor on the engine block.
Tighten to the couple the detonation sensor.
Connect the 90-way terminal-tester instead of the calculator and check the insulation,
the continuity and the absence of contact resistance along the circuits:
pin 20 of calculator -> pin 1 of detonation sensor
pin 79 of calculator -> pin 2 of detonation sensor
pin 79 of calculator -> detonation sensor screening.
Remedy if necessary.
If the incident persists, change the detonation sensor.
Th e pr ob lem 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
calcul ator.
Erase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.AFTER
REPAIR
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 43
DIAG
NOSING-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
PR ESENT27.
Conditions of breakdown detection by the calculator:
-take the contact and wa it for the dialogue with the tester to be lost
-set the conta ct and enter dialogue.
Condition of performing the diagnosing:
-defec t 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 co ntinuity along the circuit:
pi n 8 of calculator
♦ po le 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
calcul ator.
AFTER
REPAIREr ase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.
vnx.su

E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 44
DIAG
NOSING-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. Sh ort-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 conta ct and enter dialogue.
Condition of performing the diagnosing:
-the defe ct is present
Note: this defect has to be correlated with the diagnosing of the water
temperature sensor circuit and the air-conditioning installation.
S UGGESTIONS
Check the connection and the condition of the high-speed 234 ve n tilator co n nector
Change the connector if necessary.
Check, after se tt i ng co ntact, the presence of +12 V at po le 1 of the 234 re la y .
Remedy it if necessary.
Connect the 90-way terminal-tester instead of the calculator and check the insulation
and the con ti nui ty alo ng the circui t:
pin 38 of calculator
® pole 2 of the low-speed 234 ve nt il a to r relay.
Remedy if necessary.
Check the co i l of the lo w- sp e ed 23 4 ventilator relay.
Change re la y 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
ele ct ric sho ck.
The cause of the destru ction must be found before mounti ng a new
calcu lato r.
Er ase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.AFTER
R EPAIR
28.
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 45
DIAG
NOSING-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. Sh ort-circuit at 12 V along the way to pin 8 of the calculator.DEFECT
PRESENT29.
Conditions of breakdown detection by the calculator:
-take the contact and wait for the dialogue with the tester to be lost
-set the conta ct and enter dialogue.
Condition of performing the diagnosing:
-the defe ct 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 23 4 cooling ventilator
re lay.
Change the connector if necessary.
Check, af t er se tt i ng co nt a ct, the pr e sence of +12 V at po le 1 of the 234 re lay.
Remedy it if necessary.
Connect the 90 - way te r m in a l -tester instead of th e calculator an d check the in s ulation
and the con ti nui ty alo ng the circui t:
pi n 8 of ca lc ul at or
♦ pole 2 of th e 23 4 cooling ve nt il at or re la y.
Remedy if necessary.
Check th e coil of th e 234 co ol in g ventilator relay.
Change th e relay if ne ce ss ar y .
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
ele ct ric sho ck.
The cause of the destru ction must be found before mounti ng a new
calcu lato r.
Er ase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.AFTER
R EPAIR
vnx.su

E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 57
DIAG
NOSING-INTERPRETING THE STATES
The idle mode rotation
ra tio > maximal limit. The id
le mode rotation ratio is too great.
- Chec k the oil level of the engine
- Chec k the good functioning of the atmospheric pressure sensor.
- Check the tubes connected to the admission collector.
-C heck the fittings of the admission collector
- Check the watertightness fittings of the clapper body
- Check the watertightness of the power-brakes.
- Chec k the presence of the nozzles of the oil-vapour re-aspiration circuit
- Chec k petrol pressure.
- Check the adjustment of the rocker-arms and the settling of the distribution.
If all the above are correct, then the step-by-step engine will have to be replaced.
Perform again the conformity test
AF T E R REPAIR
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