Dacia SuperNova (engine E7J). Service manual — part 37
E7J-A-2/60 ENGINE
17
IGNITION AND INJECTION
17 - 58
STATE
ENRICHMENT ADJUSTMENT
SUGGESTIONS
There should be no defect present or memorized.
Check the connection and the condition of the oxygen probe connector.
Remedy if necessary.
Check the presence of + 12V at pin A of oxygen probe after setting the contact.
Check insulation and continuity along the circuits:
pin 45 calculator
♦
pin C oxygen probe
pin 80 calculator
♦
pin D oxygen probe.
Remedy if necessary.
- Check the ignition system
- Check the watertightness of the connections to the canister draining valve and to the can
ister (lack of watertightness in these locations considerably perturbs enrichment).
- Check the watertightness of the exhaust (i.e. exhaust-pipe) circuit.
- Check the watertightness of the intake collector.
- If the car only runs in town, the probe can be clogged (try to do a loaded running)
- If the idle mode running is unstable, check the adjustment of the rocker-arms and the
settling of the distribution.
- Check petrol pressure
- Check the injectors (the petrol flow and the shape of the flow).
If necessary, replace the oxygen probe.
AFTER REPAIR
Perform again the conformity test.
DIAGNOSING-INTERPRETING THE STATES
E7J-A-2/60 ENGINE
17
IGNITION AND INJECTION
17 - 59
STATE
AIR CONDITIONING AC COMPRESSOR REQUIREMENT
SUGGESTIONS
No defect should be present or memorized
The compressor
clutch does not
couple
Check the insulation and continuity along the circuit towards pin 10
injection calculator.
Remedy if necessary.
If the incident persists, refer to the diagnosing of he air-conditioning.
AFTER REPAIR
Perform again the conformity test
CALCULATOR POWER VOLTAGE
PARAMETER
No defect should be present or memorized.
No consumer should be turned on.
SUGGESTIONS
The contact is set
If the voltage < the minimal voltage, then the battery may be flat.
Check the charging circuit, in order to detect the cause of the problem.
If the voltage > the maximal voltage, then it is possible that the
battery may be overcharged.
Check the charging voltage to be correct, with and without consumers.
In idle mode
If the voltage < the minimal voltage, then the charging voltage is too
small.
Check the charging circuit, in order to detect the cause of the problem.
If the voltage > the maximal voltage, then the charge of the battery is
too high.
The voltage regulator is faulty.
Remedy this problem, and then check the level of the electrolyte in the
battery.
DIAGNOSING-INTERPRETING THE STATES
E7J-A-2/60 ENGINE
17
IGNITION AND INJECTION
17 - 60
DIAGNOSING-INTERPRETING THE STATES
Remark:
The testing of the battery and the charging circuit can be done with “TECHNIC CLIP”
and does not require disconnecting the battery, so it allow the conservation of the calculator
memory.
AFTER REPAIR
Perform again the conformity test.
PARAMETER
CLAPPER POSITION
MEMORIZED VALUE FOR
FREE POSITION OF ACCELERATION PEDAL
SUGGESTIONS
No defect should be present or memorized.
The contact is set or the engine is started.
The value is
memorized at limit
or failure to detect
the free pedal
position, or failure to
detect the completely
pushed down
position
Check if the mechanic limitation of the potentiometer has been
altered.
Check the command of the acceleration (friction, obstacles).
Check the resistance of the clapper potentiometer.
Change potentiometer if necessary.
Check the insulation, the continuity and the absence of contact
resistance along the circuits:
pin 43 of calculator
♦ pin C of clapper potentiometer
pin 74 of calculator
♦ pin B of clapper potentiometer
pin 75 of calculator
♦ pin A of clapper potentiometer.
Remedy if necessary.
The position, of the
clapper is fixed
Check the resistance of the clapper potentiometer during the
operation of the clapper.
If the resistance varies, check the electric circuits connected to
the potentiometer.
If the resistance does not vary, check if the potentiometer is
mechanically coupled to the clapper.
Change the potentiometer if necessary.
AFTER REPAIR
Perform again the conformity test.
E7J-A-2/60 ENGINE
17
IGNITION AND INJECTION
17 - 61
DIAGNOSING-INTERPRETING THE STATES
PARAMETER
WATER TEMPERATURE
SUGGESTIONS
No defect should be present or memorized
If the value read is not real, check if the sensor for water temperature correctly follows the
“standard curve of the resistance according to temperature”.
Replace sensor if there are deviations.
REMARK: a sensor displaying deviations regarding the normal evolution of its param
eters has previously undergone an electric shock.
Check the insulation, the continuity and the absence of contact resistance along the circuits:
pin 13 of calculator
♦
pin B2 of water temperature sensor
pin 73 of calculator
♦
pin B1 of water temperature sensor.
Remedy if necessary.
AFTER REPAIR
Perform again the conformity test.
SUGGESTIONS
No defect should be present or memorized
PARAMETER
AIR TEMPERATURE
If the value read is not real, check if the sensor for air temperature correctly follows the
“standard curve of the resistance according to temperature”.
Replace sensor if there are deviations.
REMARK: a sensor displaying deviations regarding the normal evolution of its param
eters has previously undergone an electric shock.
Check the insulation, the continuity and the absence of contact resistance along the circuits:
pin 49 of calculator
♦
pin 1 of air temperature sensor
pin 73 of calculator
♦
pin 2 of air temperature sensor.
Remedy if necessary.
AFTER REPAIR
Perform again the conformity test.
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