RENAULT KANGOO 1997 KC / 1.G Engine And Peripherals Workshop Manual

INJECTION
Location of components
17
4 Absolute pressure sensor
5 Idle speed regulation stepping motor
7 Air temperature sensor6 Throttle position potentiometer
11 TDC sensor
13337R
1 Fuel vapour recycling solenoid valve
14 Coil for cylinders 2-3
16 Coil for cylinders 1-4
18 Anti-interference condenser
13242R1
13339R
13 Oxygen sensor
(tightening torque : 4.5 daN.m)
13243R
E7J Engine
17-11

INJECTION
Location of components
17
K Fan assembly relay (for versions with air
conditioning)
L Fuel pump relay
M Fan assembly relay (for versions without air
conditioning) slow speed fan assembly (with
air conditioning) 15 Power assisted steering pressostat
13241R
12839S
E7J engine
17-12

INJECTION
Coolant temperature management
244Injection coolant temperature sensor and
coolant temperature indication on
instrument panel.
3 track sensor, of which two tracks are
allocated to the injection coolant
temperature information, and one to the
indication of the coolant temperature on
the instrument panel.
259Warning coolant temperature switch for
instrument panel.
Operating principle
Sensor 244 allows :
- the coolant temperature to be shown on the
instrument panel,
- the injection computer to receive constant in-
formation on the engine coolant temperature
.
The injection computer, depending on the co-
olant temperature, controls :
- the injection system,
- the cooling fan assembly.
The engine cooling fan assembly is controlled
at fast speed (both slow and fast speeds are
controlled by the air conditioning system) if
the temperature is greater than 99°C. If the
temperature falls below 96°C, it cuts off
automatically ( if a check has to be carried out,
ensure that the air conditioning is not opera-
tional).
17
11634R2
D7F Engine
13239R1
E7J Engine
17-13

INJECTION
Injection fault warning light
17
PRINCIPLE FOR ILLUMINATION OF INJECTION FAULT WARNING LIGHT ON INSTRUMENT PANEL
• Vehicles not equipped with the immobiliser function:
When the ignition is switched on, the warning light illuminates constantly for 3 seconds , then extin-
guishes.
• Vehicles with immobiliser function deactivated:
When the ignition is switched on, the injection warning light illuminates constantly for 3 seconds and
then extinguishes.
When the doors are unlocked, the red immobiliser light, which was previously flashing, extin-
guishes.When ignition is switched on, it illuminates for 3 seconds , then extinguishes.
• Vehicles with immobiliser function activated:
When the ignition is switched on, the computer does not recognise the code, and stops the engine from
starting. The injection warning light remains illuminated for 3 seconds and then extinguishes.
Before the ignition is switched on, the red immobiliser light flashes. On switching the ignition on, it
flashes more rapidly.
If a fault is detected in the immobiliser system whilst the engine is running, the injection warning light
flashes in the engine speed range between idle speed and 1 500 rpm approximately .
• Fault in a component of the injection system
The warning light is illuminated if a fault has been detected in:
- the pressure sensor,
- the vehicle speed,
- the throttle potentiometer,
- the idle speed regulation stepping motor.
17-14

INJECTION
Immobiliser function
17
This vehicle is fitted with a 2nd generation immobiliser system.
REPLACING THE INJECTION COMPUTER
All computers are supplied uncoded, but are capable of being programmed with a code.
When replacing the computer, the vehicle code must be programmed in and then a check must be made to
ensure that the immobiliser system is operational.
To do this, it is sufficient to carry out the following operations:
- turn the ignition on for a few seconds and turn it off again,
- remove the key to guarantee the immobiliser function.
CHECKING THE IMMOBILISER FUNCTION
Remove the key from the ignition switch. After 10 seconds the red immobiliser warning light will flash.
For special notes on testing an injection computer (test part), refer to section 82: "Immobiliser".
17-15

INJECTION

Computer configuration depending on gearbox type17
The screen will display :
COMPUTER CONFIGURATION DEPENDING ON GEARBOX TYPE (MANUAL GEARBOX OR AUTOMATIC
TRANSMISSION)
Each time the injection computer is replaced, it must be programmed with the type of gearbox (manual or
automatic) which is fitted in the vehicle. The computers are designed to function with either type of gearbox.
Method for configuring the computer
Connect the
XR25
Select S8
Switch on the ignition
Enter D13 then
For vehicles fitted with manual gearbox :
Enter G50* 2*
For vehicles fitted with automatic transmission :
Enter G50* 1*
if the configuration has not been made
To ensure that the computer has memorised the data correctly, switch the ignition back on , using fault fin-
ding fiche n° 27; the fault bargraph
20 LH should be extinguished, whilst the 19 LH or RH status bargraph
should be illuminated.
then if the configuration is complete
17-16

INJECTION
Injection/air conditioning programming
17
THIS VEHICLE IS FITTED WITH A VARIABLE OUTPUT COMPRESSOR
AIR CONDITIONING/INJECTION COMPUTER CONNECTION
The electrical connection :
- between the air conditioning computer and the injection computer consists of a single wire (track 5).
This track carries two types of information :
-the fast idle speed request information . For this information to be transmitted to the injection
computer , two conditions must be fulfilled :
• the air conditioning function must have been selected on the control panel ,
• the pressure in the air conditioning circuit must be greater than a certain threshold.
If this information is transmitted, the fast idle speed is obtained (it is therefore normal that
sometimes, when the air conditioning is switched on, engine idling, there is no fast idle speed ).
-the Absorbed Power information. This information has no influence on the idle speed. It simply
informs the injection computer of the torque value taken up by the compressor; the computer, in
turn, acts on the idle speed regulation solenoid. The absorbed power may be visualised using the
XR25. When the air conditioning is switched on , #44 should be between 300 and 5 000 watts.
IMPORTANT: the value at #44 or idle speed is never equal to 0, whatever the status of the
compressor, off or on . The minimum value which may be read using #44 is approximately 300
watts.
- between the the injection computer and the air conditioning computer consists of a single wire (track
51). This track carries the information regarding the authorisation or prevention of compressor
operation.
COMPRESSOR OPERATION PROGRAMMING
During certain operating phases, the injection computer prevents the compressor from operating.
Programming when starting engine
The compressor is prevented from functioning for 10 seconds after starting the engine .
Recovery of performance ( D7F engine)
Depending on the torque required by the driver and on the power absorbed by the air conditioning
compressor, the injection computer stops or allows the operation of the compressor .
Anti-stalling function (D7F engine)
If the no load position is recognised , and the engine speed is lower than 600 rpm, and if the power absorbed
by the compressor is greater than 300 watts, the compressor disengages .
It engages again if:
- the no load position is recognised when the engine speed reaches 850 rpm.,
- if the no load position is not recognised when the engine speed reaches 1 800 rpm.
Thermal protection programming ( E7J engine )
The compressor does not engage in cases where the coolant temperature is greater than or equal to +
115°C.
Over-revving protection (E7J engine )
The compressor is prevented from operating if the engine speed is greater than 5 900 rpm.
17-17

INJECTION
Idle speed correction
17
CONNECTION BETWEEN THE POWER ASSISTED STEERING PRESSOSTAT AND THE INJECTION COMPUTER
The injection computer receives information from the power assisted steering pressostat . This varies
depending on the pressure present in the hydraulic circuit. The higher the pressure, , the more energy is
absorbed by the power assisted steering pump.
To compensate for this energy absorption, the injection computer increases the opening ratio of the idle
speed regulation stepping motor.
The information is received on track 13 of the injection computer. If the pressostat is closed , the computer
receives an earth . The idle speed is adjusted to 800 rpm for the D7F engine and 850 rpm for the E7J
engine .
IDLE SPEED CORRECTION DEPENDING ON THE BATTERY VOLTAGE
The objective of this correction is to compensate for the drop in voltage, due to consumer operation when
the battery is poorly charged To correct this, the idle speed is increased, allowing the alternator to rotate
faster and consequently increase the charging voltage.
The lower the voltage, the greater the degree of correction. Correction of the engine speed is therefore
variable. It begins when the voltage drops to below 12.7 Volts. Correction begins at the nominal engine
speed and may reach a maximum of 880 rpm for the D7F engine and 930 rpm for the
E7J engine .
IDLE SPEED CORRECTION DEPENDING ON AIR CONDITIONING OPERATION
The injection computer increases the idle speed to 850 rpm. for the D7F engine and 880 rpm . for the E7J
engine , provided it receives the fast idle speed information from the air conditioning computer.
17-18

INJECTION
Adaptive idle speed correction
17
PRINCIPLE
Under normal warm engine operating conditions , the R.C.O. idle speed value at #12 varies between a
high value and a low value, until the nominal idle speed is obtained .
It is possible that during variations in the operation of the vehicle (running in, engine wear..), that the
R.C.O. idle speed value could become close to the highest or lowest values.
The adaptive correction (#21) of the
R.C.O. idle speed (#12) allows the slow variations in the engine air re-
quirement to be corrected, so that the
R.C.O. (#12) is recentred to an average nominal value.
This correction only becomes effective if the coolant temperature is higher than 75°C, 20 seconds after
starting the engine and if the nominal idle speed regulation phase has been reached.
VALUES FOR THE R.C.O. IDLE SPEED AND ITS ADAPTIVE CORRECTION
D7F 710
engineE7J 780
engine
Nominal idle speed (#06) X = 740 rpm X = 750 rpm
R.C.O. idle speed (#12) 4 %≤X≤14 % 2 %≤X≤15 %
Adaptive idle speed (#21)Limit value:
- minimum : - 4.3 %
- maximum :+3.9 %Limit value:
- minimum : - 2.4 %
- maximum :+6.2 %
INTERPRETATION OF THE GATE VALUES
In the case of excess air (air leak or throttle stop incorrectly adjusted ..) the idle speed increases, and the
R.C.O.idle speed value at #12 decreases , in order to return to the nominal idle speed; the value of the
R.C.O.idle speed adaptive correction at #21 decreases to re-centre the R.C.O. idle speed at #12.
In the case of a lack of air (contamination, etc.), the process is inverted : the
R.C.O. idle speed at #12 in-
creases and the adaptive correction at #21 also increases, in order to re-centre the #12 to an average nomi-
nal value.
IMPORTANT : It is vital, after erasing the memory from the computer (disconnecting the battery), to let the
engine run at idle speed before returning the vehicle to the customer, so that the adaptive correction can be
correctly reset.
17-19

OXYGEN SENSOR VOLTAGE (#05)
Reading #05 on the XR25 : the value read is the voltage sent to the computer by the oxygen sensor; it is ex-
pressed in volts (the value actually varies between 0 and 1 000 millivolts).
When the engine is in the loop phase, the voltage value should oscillate rapidly and should be between
50±50 mV (lean mixture) and 850 ± 50 mV (rich mixture) and vice versa.
The smaller the gap between the upper and lower values, the poorer the information from the sensor (the
gap is usually at least 500 mV).
RICHNESS CORRECTION (#35)
The value given under # 35 on the XR25 represents the average value of richness corrections made by the
computer depending on the richness of the burnt mixture as seen by the oxygen sensor (the oxygen sensor ac-
tually analyses the oxygen content of the exhaust gases directly from the richness of the burnt mixture).
The richness correction has a centre point of 128 with thresholds of 0 and 255 (experience has shown that un-
der normal operating conditions # 35 is located close to 128 with only a small amount of variation).
- Value less than 128 : request for mixture to be made leaner.
- Value greater than 128 : request for mixture to be made richer.
ENTRY INTO RICHNESS REGULATION MODE
Loop phase
Richness regulation begins after the timed starting period :
- for no load, if the coolant temperature has reached :
•46°C for the E7J engine ,
•30°C for the D7F engine.
- outside no load conditions if the coolant temperature is greater than :
•+ 20°C for the E7J, engine
•+ 20°C for the D7F engine.
The timed starting period is dependent on the coolant temperature :
- at 20°C it is a maximum of :
•3 minutes for the E7J engine,
•1 minute 20 seconds for the D7F engine,
- at 80°C it is a maximum of :
•1 minute 30 seconds for the E7J engine,
•35 seconds for the D7F engine,
If richness regulation has not yet started, #35 = 128
INJECTION
Richness regulation
17
17-20