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

INJECTION
Richness regulation
17
Non-loop mode
When richness regulation is occurring, the operating phases when the computer ignores the voltage informa-
tion from the oxygen sensor are:
- Full load: #35 = variable and greater than 128
- Sharp acceleration: #35 = variable and greater than 128
- Deceleration with no load information (injection cut) : #35 = 128
- Oxygen sensor fault: #35 = 128
DEFECT MODE IN THE EVENT OF AN OXYGEN SENSOR FAULT
If the voltage from the oxygen sensor is incorrect (# 05 varies only slightly or not at all) during richness regu-
lation, the computer will only enter defect mode (# 35 = 128) if the fault has been present for 3 to 5 minutes.
The fault will be memorised in this case only.
If an oxygen sensor fault is present and recognised and if the fault has already been stored, the system enters
the open loop mode directly (# 35 = 128)
17-21

INJECTION
Adaptive richness correction
17
D7F
Engine
E7J
Engine
106 ≤ #30 ≤ 150 40 ≤ #30 ≤ 192
106 ≤ #31 ≤ 150 40 ≤ #31 ≤ 192
PRINCIPLE
In the loop mode (see section 17 "Richness regulation"), richness regulation (# 35), corrects the injection ti-
ming to give fuel metering which is as close as possible to richness 1. The correction value is close to 128, with
limit values of 0 and 255.
Variations may affect the components of the injection system and the correction may drift towards 0 or 255,
to ensure richness 1 is obtained.
Adaptive correction allows the injection mapping to be adjusted to recentre the richness regulation to 128
and to ensure a constant authority of correction to make the mixture leaner or richer.
Adaptive correction to richness regulation has two parts:
- Adaptive correction for average and high engine loads (#30)
- Adaptive correction for idle speed and low engine loads (#31).
Adaptive corrections take 128 as the average value after initialisation (erasing the memory) and have the
following threshold values:
Adaptive correction only takes place when the engine is warm, in the loop phase (#35 variable) and for a
specified manifold pressure range.
The engine must have operated in the loop mode for several pressure zones in order that adaptive correc-
tion begins to change to compensate for the variations in engine operating richness.
Following reinitialisation of the computer (return to 128 for # 30 and # 31) a special road test must therefore
be carried out.
17-22

INJECTION
Adaptive richness correction
17
Zone n° 5
(mbars)Zone n° 4
(mbars)Zone n° 3
(mbars)Zone n° 2
(mbars)Zone n° 1
(mbars)
220340470 600 730870
Average 280 Average 405 Average 535 Average 665 Average 800
260385510 635 760970
Average 320 Average 450 Average 570 Average 700 Average 865
E7J
D7F Pressure zones to cover during the test (reading #01)
Following this test the corrections will be operational.
# 31 varies more significantly for idle speed and low loads and # 30 for average and high loads, but both
are operational over all of the manifold pressure ranges.
The test should be followed by a normal, smooth and varied drive, covering a distance of 3 to 6 miles (5 to
10 km).
After the test, read the values for #30 and #31. Initially 128, they may have changed. If not, repeat the test
ensuring that the test conditions are observed.
ROAD TEST
Conditions :
- Engine warm (coolant temperature > 75° C).
- Do not exceed engine speed 4 400 rpm. for the D7F engine.
and 4 800 rpm. for the
E7J engine.
For this test , it is advisable to start from a fairly low engine speed , in 3rd or 4th gear using progressive acce-
leration to stabilise the required pressure for 10 seconds in each zone (see table).
NOTE : for the D7F engine, for example, for zone n° 1, attempt to maintain the average of 320 mbars for
at least 10 seconds.
17-23

INJECTION
Adaptive richness correction
17
INTERPRETATION OF INFORMATION GATHERED DURING A ROAD TEST
If there is a lack of fuel (injectors dirty, fuel pressure and flow too low...), richness regulation # 35 increases to
obtain the richness as close as possible to richness 1 and adaptive correction # 30 and # 31 increases until the
richness correction returns to oscillate around 128.
If there is an excess of fuel, the situation is reversed : Richness regulation # 35 reduces and adaptive
correction # 30 and # 31 also reduces to recentre the richness correction (# 35) around 128.
NOTE : the analysis which may be made using # 31 remains difficult since this correction mainly operates for
idle speed and low loads and is also very sensitive.
Hasty conclusions should not therefore be drawn from this gate value, rather the position of # 30 should be
examined.
The information from these two gates gives an idea about the engine operation richness, and may be used as
a guide for fault finding. In order for these to be put to good use during fault finding, no conclusion may be
drawn from their value unless they are at the minimum or maximum correction limit, and if both gate values
were offset in the same direction.
IMPORTANT : # 30 and # 31 should only be examined and analysed after a customer complaint, an opera-
ting fault and if they are at the threshold with the value for # 35 also offset (# 35 varies above 175 or be-
low 80).
17-24

COOLING
Specifications
19
VOLUME AND GRADE OF ANTI-FREEZE
Engine Volume (in litres) Grade Special notes
D7F
E7J
F8Q5
6
7.5
GLACEOL RX (type D)
recommended coolant
onlyProtection down to - 20 ± 2°C ,
warm, temperate and cold countries
Protection down to - 37 ± 2°C for
extreme cold countries
THERMOSTAT
Engine type Starts opening (in °C) Fully open (in °C) Travel (in mm)
D7F - E7J - F8Q89 101 7.5
19-1

COOLING
Filling and bleeding
19
There is no heater matrix water control valve.
Water flow is continuous in the heater matrix,
which contributes to the cooling of the engine.
FILLING
Check the tightening of the drain plug(s).
Open the two bleed screws.
Fill the circuit through the opening in the expan-
sion bottle.
Tighten the bleed screws as soon as the liquid
flows in a continuous jet.
Start the engine (2 500 rpm).
Adjust the level by overflow for a period of about
4 minutes .
Close the bottle.
BLEEDING
Allow the engine to run for about 10 minutes at
2 500 rpm, until the fan(s) operate (time necessary
for automatic degassing).
Check the liquid level is at the "Maximum" mar-
ker.
DO NOT OPEN THE BLEED SCREWS WHILST THE
ENGINE IS TURNING.
RE-TIGHTEN THE EXPANSION BOTTLE CAP WHILST
THE ENGINE IS WARM.
19-2

COOLING
Testing
19
SPECIAL TOOLING REQUIRED
M.S.554-01 Adapter for M.S. 554-05
M.S.554-06 Adapter for M.S. 554-05
M.S.554-07 Kit for testing cooling circuit
sealing
97871R
Engine Colour of valve Valve rating (in
bars)
D7F-E7J-F8QBrown 1.2
1 - Testing the sealing of the circuit
Replace the expansion bottle valve with adapter
M.S. 554-01.
Connect this to tool M.S. 554-07.
Let the engine warm up then turn it off.
Pump to put the circuit under pressure.
Stop pumping at 0.1 bar less than the valve is
rated.
The pressure should not drop, otherwise look for
the leak.
Slowly unscrew the union of tool M.S. 554-07 to
decompress the cooling circuit, then remove tool
M.S. 554-01 and refit the expansion bottle valve
with a new seal.2 - Checking the rating of the valve.
If liquid passes through the expansion bottle
valve,the valve must be replaced.
On pump M.S. 554-07 fit tool M.S. 554-06 and fit
the assembly on the valve to be checked.
Increase the pressure which should stabilise at the
valve rating pressure with a test tolerance of
±
0.1 bar.
Valve rating :
19-3

COOLING
Diagram
19
1 Engine
2 Radiator
3 ”Hot” bottle with permanent degassing
4 Heater matrix
5 3 mm diameter restriction
The fan assembly is controlled at high speed by
the injection computer if the coolant tempera-
ture is greater than 99°C.
If the coolant temperature is lower than 96°C, the
fan assembly stops operating.Water pump
Thermostat
Bleed screw
The expansion bottle valve is brown, and its rating
is 1.2 bar.
10070-2R
D7F Engine
19-4

COOLING
Diagram
19
1 Heater
2 Radiator
3 ”Hot” bottle with permanent degassing
4 Heater matrix
5 Thermostat mounting
6 3 mm diameter restriction
The fan assembly is controlled at high speed by
the injection computer if the coolant tempera-
ture is greater than 99°C.
If the coolant temperature is lower than 96°C, the
fan assembly stops operating.Water pump
Thermostat
Bleed screw
Temperature switch
The expansion bottle valve rating is 1.2 bar
(colour:brown).
13508R
E7J Engine
19-5

COOLING
Diagram
19
Water pump
Thermostat
Bleed screw
Temperature switch
13504R
F8Q Engine
1 Heater
2 Radiator
3 ”Hot” bottle with permanent degassing
4 Heater matrix
5 Thermostat mounting
6 3 mm diameter restriction
The expansion bottle valve rating is 1.2 bar
(colour:brown).
19-6