2004 DACIA SUPERNOVA check engine

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 - 36
DIAG
NOSING-INTERPRETING THE DEFECTS
DEFECT
PRESENT
CANISTER DRAINING VALVE CIRCUIT
1. Short-circuit at 12 V along the way to pin 4 of calculator (draining valve command)
2. Short-circuit at mass along the way to pin 4 of calculator
(draining valve command)
3. Open c ircuit along the way to pin 4 of calculator (draining valve
command)20.
SUGGES TIO NS
Check the connection and the condition of the canister draining valve connector
Change the connector if necessary.
Check the resistance of draining valve.
Change the valve if necessary.
Check, after setting the contact, the presence of +12V at pin 1 of the canister draining
valve.
Remedy if necessary.
Connect the 90-way terminal-tester instead of the calculator and check the insulation and
the continuity along the circuit:
pin 4 of calcul ato r ♦ pin 2 of canister draining valve
Remedy if necessary.
Change canister draining valve
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.
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 - 37
DIAG
NOSING-INTERPRETING THE DEFECTS
DEFECT
PRESENTOR
MEMORI ZEDOXYGEN PROBE CIRCUIT
Breakdown of oxygen probe signal
Conditions of breakdown detection by the calculator:
-se t the contact
-start the engine and wait for the enrichment adjustment to be
active for at least 5 minutes.
Conditions of performing the diagnosing:
-defec t is present

-t he de fe ct ha s bee n memoriz ed but is recorded in the “present” stat e .
SUGGESTIONS
Check the connection and the condition of the oxygen probe
Change the connector if necessary.
Check if there is any “false air” caused by cases of lack of watertightness along the
exhau st-probe circuit.
If the ca r has been running a lot out of town proceed to probe-cleaning
Check, after setting the contact, the presence of +12 V 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 calculator
♦ pin C of ox ygen probe
pin 80 of calculator
♦ pin D of oxygen probe.
Remedy if necessary.
Change the oxygen probe if the incident persists
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.
Er ase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.
AFTER REPA IR
21.
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 38
DIAG
NOSING-INTERPRETING THE DEFECTS
OXYGEN PROBE HEATING CIRCUIT
1. Short-circuit at 12 V along the way to pin 63 of calculator (heating oxygen probe command)
2. Short-circuit at mass along the way to pin 63 of calculator (heating oxygen probe command)
3. Open circuit at 12 V along the way to pin 63 of calculator (heating oxygen probe command)
4. Breakdown of the probe fuse heating power.
DEFECT
PR ESENT OR
MEMO RIZED
Conditions of breakdown detection by the calculator:
-start the engine
Conditions of performing the diagnosing:
-defec t is present

-t he def ec t has been memor ized but is rec orded i n t he “pr es e nt ” s t at e.
SUGGESTIONS
Check the connection and the condition of the oxygen probe connector
Change the connector if necessary.
Check the heating resistance of the oxygen probe.
Change the oxygen probe if necessary.
Check the presence of +12V at pin A of the oxygen probe.
Remedy the electric circuit up to the actuating relay 238 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 the oxygen probe.
Remedy if necessary.
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.
22.
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 - 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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