fuel pressure RENAULT KANGOO 1997 KC / 1.G Foult Finding - Injection Workshop Manual

JF5111.0
INJECTION
Fault finding - Status and parameter checks
17
E7J 780
engine
Carry out the actions below if the engine does not start.
Otherwise, refer to the following pages.NOTES
Order of
operationsFunction to be
checkedAction Bargraph Display and notes Fault finding
1Flywheel signal
sensor StarterIlluminated if TDC
information is detected
DIAG 5
2Fuel pump
G10*Fuel pump should be
heard to operateDIAG 6
3 IgnitionConnect
Optima
StationStarting test.
Complete guide on
Optima StationUse Optima
5800 Station
4Fuel pressureConnect
pressure
gauge to
fuel inlet
and activate
starter
motorPressure gauge must
show
2.5 bars Fuel pressure,
see Workshop
Repair
Manual or
section
5Injector
commandStarterFuel must come out of
the injector
DIAG 11
6Engine
compressionConnect
Optima
StationComplete guide on
Optima StationUse Optima
5800 Station
7 FlywheelConnect
Optima
StationOscilloscope.
Complete guide on
Optima StationUse Optima
5800 Station
3
17-32

JF5111.0
INJECTION
Fault finding - Status and parameter checks
17
E7J 780
engine
Order of
operationsFunction to be
checkedAction Bargraph Display and notes Fault finding
1Charging
circuit# 0413 < X < 14.5 V
DIAG 1
2Throttle
potentiometerNo loadIlluminated (does not
flash!)DIAG 2
3 Idle speed
regulation# 06
# 12
# 21700 < X < 800 rpm
2 % < X < 15 %
- 2.4 % < X < 6.2 %DIAG 7
4Anti-pinking
circuit# 13 (at
3500 rpm,
no load)X variable and not zeroDIAG 8
5 Pressure circuit# 01
# 16300 ≤ X ≤ 400 mb
X = atmospheric pressureDIAG 9
6Richness
regulation# 35
# 050 < X < 255
X varies around 128
50 ≤ X ≤ 900 mb
DIAG 10
See also
DIAG 15
7Fuel pressureConnect a
pressure
gauge to the
gallery and
activate the
starter
motorPressure gauge must
show
2.5 barsFuel pressure,
see Workshop
Repair
Manual or
section
Carry out the actions below (engine warm, at idle speed, no consumers)
if the engine starts.
Otherwise refer to the previous pages.
NOTES
6
6
2
17-33

Check the insulation and continuity of the line:
Computer 9 D Idle speed regulation motor
Computer 35 A Idle speed regulation motor
Computer 40 B Idle speed regulation motor
Computer 36 C Idle speed regulation motor
Repair if necessary and continue fault finding using the value for # 06.
JF5111.0
INJECTION
Fault finding - Status and parameter interpretation17
E7J 780
engine
AFTER REPAIRStart the status and parameter check again from the beginning.
DIAG 7
IDLE SPEED REGULATIONFiche n° 27
XR25 aid:Engine speed , Minimum < # 06 < Maximum
No fault bargraphs should be illuminated.NOTES
# 06 < MinimumThe idle speed is too lowNOTES
Idle speed regulation is not maintaining the idle speed.
- Clean the air supply circuit (throttle body, idle regulation valve), since it is probably contaminated.
- Check the engine oil level (too high ---
> splashing).
- Check and ensure correct fuel pressure.
- Using the OPTIMA 5800 station, check the engine compression.
- Check the valve clearances and the timing.
If all these points are correct, replace the idle regulation motor.
# 06 > MaximumThe idle speed is too highNOTES
An air leak may be affecting the idle speed regulation programming.
- Check the connections on the manifold.
- Check the hygiene of the pipes on the manifold.
- Check the pneumatically controlled solenoid valves.
- Check the manifold gaskets.
- Check the throttle body gaskets.
- Check the sealing of the brake servo.
- Check the restrictions are present in the oil vapour rebreathing circuit.
- Check the fuel pressure.
If all these points are correct, replace the idle speed regulation motor.
17-42

Connect the bornier in place of the computer and check the insulation and continuity of the line:
Computer 17 C Oxygen sensor
Repair if necessary.
JF5111.0
INJECTION
Fault finding - Status and parameter interpretation17
E7J 780
engine
AFTER REPAIRStart the status and parameter check again from the beginning.
DIAG 10
Fiche n° 27
RICHNESS REGULATION
XR25 aid:Richness regulation faulty
No fault bargraphs should be illuminated.
Ignition correct (a check may be made using the OPTIMA 5800 station).
No other status bargraph should show a fault.
NOTES
Check the sealing of the canister bleed valve (a leak can disrupt the richness considerably).
Check the sealing of the exhaust pipe upstream from the oxygen sensor.
Check the sealing of the inlet manifold.
If the vehicle has only been driven in town, the sensor is contaminated (try driving under load).
Check the fuel pressure.
If the idle speed is unstable, check the valve clearances.
Check the injectors (flow and shape of the jet).
If necessary, replace the oxygen sensor.
Check the connection and condition of the oxygen sensor connector.
Ignition on, during the timed phase, check for:
- earth on track B of the oxygen sensor.
-+ 12 V after the fuel pump relay on track A of the oxygen sensor.
Repair if necessary.
17-45

JF5111.0
INJECTION
Fault finding - Status and parameter interpretation17
E7J 780
engine
AFTER REPAIRStart the status and parameter check again from the beginning.
DIAG 15
CONT
Fiche n° 27
No fault bargraphs should be illuminated.NOTES
NOTES λ > 1.03
at 2500 rpm.None
The oxygen sensor loops correctly at 2500 rpm.
NOTES λ < 0.97
at 2500 rpm.The oxygen sensor does not loop correctly at 2500 rpm. CO >
0.3 % at 2500 rpm.
Check the pressure sensor.
Check the sensor.
Check that an injector is not faulty.
Check there is no leak at the exhaust.
Check that an injector has not seized.
Check the fuel pressure is not too low.
The oxygen sensor does not loop correctly at 2500 rpm.
Check there is not an injection fault.
Check there is not an ignition fault.
Check the sensor is not faulty.
Check the fuel pressure.
17-51

JF5111.0
INJECTION
Fault finding -Aid
17
E7J 780
engine
For further details, refer to section 12
Injector resistance = 14.5 Ω
Idle regulation stepping
motor resistance : A - D = 52 Ω
B - C = 52 Ω
Canister bleed valve resistance = 35 Ω
Ignition coil resistance : Primary = 1-3 ; 2-3 = 1 Ω
1-2 = 0.5 Ω
Secondary = 10 kΩ
Oxygen sensor heating resistance = 3 to 15 Ω
Throttle potentiometer resistance : no load 1-2 = 5440 Ωfull load 1-2 = 2200 Ω
1-3 = 4500 Ω1-3 = 4460 Ω
2-3 = 2160 Ω2-3 = 5340 Ω
Flywheel signal resistance = 220 Ω
Fuel pressure = 3 bars ignition on/ 2.5 bars at idle speed
Value for: CO = 0.3 % maximum
HC = 100 ppm maximum
CO2 = 14.5 % minimum
Lambda = 0.97 < λ < 1.03
Sensor resistance
Temperature in °C 0 20 40 80 90
Air temperature sensor
Resistance in ohms7470
to
119703060
to
40451315
to
1600--
Coolant temperature sensor
Resistance in ohms6700
to
80002600
to
30001100
to
1300270
to
300200
to
215
17-62

Order of
operationsFunction to be
checkedAction Bargraph Display and notes Fault finding
1Flywheel signal
sensor StarterIlluminated if TDC
information is detected
DIAG 5
2Fuel pump
G10*Fuel pump should be
heard to operateDIAG 6
3 IgnitionConnect
Optima
StationStarting test.
Complete guide on
Optima StationUse Optima
5800 Station
4Fuel pressureConnect
pressure
gauge to
fuel inlet
and activate
starter
motorPressure gauge must
show
2.5 bars Fuel pressure,
see Workshop
Repair
Manual or
section
5Injector
commandStarterFuel must come out of
the injector
DIAG 11
6Engine
compressionConnect
Optima
StationComplete guide on
Optima StationUse Optima
5800 Station
7 FlywheelConnect
Optima
StationOscilloscope.
Complete guide on
Optima StationUse Optima
5800 Station
JSA051.0
INJECTION
Fault finding - Status and parameter checks
17
D7F 710
engine -
35 tracks
Carry out the actions below if the engine does not start.
Otherwise, refer to the following pages.NOTES
3
17-105

JSA051.0
INJECTION
Fault finding - Status and parameter checks
17
D7F 710
engine -
35 tracks
Order of
operationsFunction to be
checkedAction Bargraph Display and notes Fault finding
1
Charging
circuit# 0413 < X < 14.5 V
DIAG 1
2Throttle
potentiometerNo load
Illuminated (does not
flash!)DIAG 2
3Idle speed
regulation# 06
# 12690 < X < 790 rpm
4 % < X < 14 %DIAG 7
4Anti-pinking
circuit# 13 (at
3500 rpm,
no load)X variable and not zeroDIAG 8
5 Pressure circuit# 01
# 16270 ≤ X ≤ 430 mb
X = atmospheric pressureDIAG 9
6Richness
regulation# 35
# 050 < X < 255
X varies around 128
50 ≤ X ≤ 900 V
DIAG 10
See also
DIAG 15
7Fuel pressureConnect a
pressure
gauge to the
fuel inlet
and activate
the starter
motorPressure gauge must
show
2.5 bars Fuel pressure,
see Workshop
Repair
Manual or
section
Carry out the actions below (engine warm, at idle speed, no consumers)
if the engine starts.
Otherwise refer to the previous pages.
NOTES
6
6
2
17-106

Check the insulation and continuity of the line:
Computer 11 D Idle speed regulation motor
Computer 12 A Idle speed regulation motor
Computer 28 B Idle speed regulation motor
Computer 29 C Idle speed regulation motor
Repair if necessary and continue fault finding using the value for # 06.
JSA051.0
INJECTION
Fault finding - Status and parameter interpretation17
D7F 710
engine -
35 tracks
AFTER REPAIRStart the status and parameter check again from the beginning.
DIAG 7
IDLE SPEED REGULATIONFiche n° 27
XR25 aid:Engine speed , Minimum < # 06 < Maximum
No fault bargraphs should be illuminated.NOTES
Check the resistance of the idle speed regulation stepping motor.
Replace the idle speed regulation valve if necessary.
# 06 < MinimumThe idle speed is too lowNOTES
Idle speed regulation is not maintaining the idle speed.
- Clean the air supply circuit (throttle body, idle regulation valve), since it is probably contaminated.
- Check the engine oil level (too high ---
> splashing).
- Check and ensure correct fuel pressure.
- Using the OPTIMA 5800 station, check the engine compression.
- Check the valve clearances and the timing.
If all these points are correct, replace the idle regulation motor.
# 06 > MaximumThe idle speed is too highNOTES
An air leak may be affecting the idle speed regulation programming.
- Check the connections on the manifold.
- Check the hygiene of the pipes on the manifold.
- Check the pneumatically controlled solenoid valves.
- Check the manifold gaskets.
- Check the throttle body gaskets.
- Check the sealing of the brake servo.
- Check the restrictions are present in the oil vapour rebreathing circuit.
- Check the fuel pressure.
If all these points are correct, replace the idle speed regulation motor.
17-115

JSA051.0
INJECTION
Fault finding - Status and parameter interpretation17
D7F 710
engine -
35 tracks
AFTER REPAIRStart the status and parameter check again from the beginning.
DIAG 10
Fiche n° 27
RICHNESS REGULATION
XR25 aid:Richness regulation faulty
No fault bargraphs should be illuminated.
Ignition correct (a check may be made using the OPTIMA 5800 station).
No other status bargraph should show a fault.
NOTES
Check the sealing of the canister bleed valve (a leak can disrupt the richness considerably).
Check the sealing of the exhaust pipe upstream from the oxygen sensor.
Check the sealing of the inlet manifold.
If the vehicle has only been driven in town, the sensor is contaminated (try driving under load).
Check the fuel pressure.
If the idle speed is unstable, check the valve clearances.
Check the injectors (flow and shape of the jet).
If necessary, replace the oxygen sensor.
17-118