2004 DACIA SUPERNOVA Repair Manual

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 - 40
DIAG
NOSING-INTERPRETING THE DEFECTS
DEFECT
PRESENTOR
MEMO RIZEDCAR SPEED INFORMATION
Car speed breakdown
Conditions of breakdown detection by the calculator:
-do a rou te-test, watching the car speed
-continue the route-test running at constant speed
-continue the route-test, running up-hill with the engine in idle
m ode.
Conditions of performing the diagnosing:
-defec t is present

-t he de fe ct ha s bee n memoriz ed but is re cor ded i n t he “pr es en t ” s t at e.
SUGGESTIONS
Check the connection and the condition of the connectors along the way to the speed
translator.
Change the connectors 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 circuit:
pin 53 of ca lculator -> pin 1 of speed translator.
Remedy if necessary.
If the incident persists, change the speed translator and the mileage cable.
24.
Erase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.
AFTER
R EPAIR
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 41
DIAG
NOSING-INTERPRETING THE DEFECTS
DEFECT
PRESENT
AIR-CONDITIONING COMPRESSOR RELAY COMMAND CIRCUIT
1. Open circuit or short-circuit to mass of the way to pin 10 of the
calculator
2. Short-circuit at 12 V along the way to pin 10 of the calculator25.
Check the connection and the condition of the 584 compressor relay.
Change the connector if necessary.
Check the presence of +12 V at pole 3 of the 584 compressor relay.
Check fuse S6 in the engine compartment.
Remedy it if necessary.
Check the presence of mass at pole 2 of the584 compressor relay
Remedy if necessary.
Check that the insulation and the continuity of the circuit:
pin 10 calculator
♦ pole 2 of the 584 compressor relay.
Remedy if necessary.
Check the coil of the 584 relay.
Change relay if necessary.
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 REPA IR
Condition of breakdown detection by the calculator:
-take the contact, and wait for the dialogue with the tester to be lost,
then set the contact and resume dialogue.
Condition of performing the diagnosing:
-defec t is present
-the defect has been memorized but is recorded in the “present” state.
Note: The calculator will command the compressor relay only if the con-
d itions are met which allow the good operational mode of the air-condi-
tioning installation (pressure of refrigerating agent in installation, work-
ing electric circuit between calculator and A.C. start switch).
Refer to directions of A.C installation repairing.
S UGGESTIONS
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 42
DIAG
NOSING-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 an d th e co nd i ti o n of the connectors al on g th e ci rcuit:
pin 9 of calcul at or -> water tem pe ra tu re ale rt li ght in di ca to r (o n board).
Change connectors if necessary.
Check the co ndition of water te mp e rature al er t light indicator on board. On se t ting the
con tac t, it mus t fla sh for 3 se co nds , the n it turn s off .
Remedy if necessary.
Check if the electric bulb of th e water te m perature alert li gh t indicato r has 12 V, after
settin g the conta ct.
Remedy 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 9 of ca lc ul at or -> wa te r te mp er at ure al ert li gh t in di cat or (on bo ar d). .
Remedy if necessary.
Er ase 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.
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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
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 46
DIAG
NOSING-INTERPRETING THE DEFECTS
FUNCTIONAL BREAKDOWN OF THE OXYGEN PROBE
La ck of coherence of the information received from the oxygen probe.DEFECT
PR ESENT OR
MEMORI ZED30.
Note down other functional defects.
Erase the defec ts memorized by the calculator.
Remedy other possible defects.AFTER
R EPAIR
Check that there is no “false air” caused by the lack of watertightness along the exhaust
circu it up to the oxygen probe
Remedy if necessary.
If the car ha s been running for a long while in town, clean the oxygen probe.
Check the connection and the condition of the oxygen probe connector.
Change connector if necessary.
Check the heating resistance of the oxygen probe.
Change oxygen probe if necessary.
Check, after setting the contact, the presence of +12V (after the actuating realy) at pin A
of the oxygen probe.
Remedy 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 45 of c alculator
♦ pin C of oxyg en probe
pin 80 of calc ulat or
♦ pin D of oxygen probe.
Remedy 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 circuit:
pin 63 of calculator
® pin B of oxygen probe.
Remedy if necessary.
If the incident persists, replace the oxygen probe.
SUGGESTIONS
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