1997 RENAULT KANGOO coolant

DIESEL EQUIPMENT
General
13
The use of electronic injection in Diesel engines has allowed the operational power of these engines to be
optimised, thus reducing the emission rate of pollutant gases.
The system consists of a computer, which receives information from:
- the coolant temperature sensor,
- the air temperature sensor,
- the engine speed sensor,
- the vehicle speed sensor,
- the load potentiometer,
- the injection start sensor, which forms part of the injector of cylinder n° 3 (injector with sensor).
It controls :
- the injection pump :
• the altimetric corrector (F8Q 630) via a relay
• the advance solenoid valve.
- the cold engine starting system (heater plugs and pre-postheating unit),
- the exhaust gas recycling system (EGR),
- the diesel injection fault warning light,
- the preheating warning light,
- the solenoid valve controlling the fast idle speed LDA,
- the relay controlling the power assisted steering electric pump assembly (for vehicles with air conditio-
ning), the pump assembly is supplied once the engine speed exceeds 650 rpm.
It carries out a self diagnosis procedure which may be visualised through the
XR25.
SPECIAL FEATURES
On the injection pump it is possible to replace:
- the load potentiometer,
- the advance solenoid valve,
- the altimetric corrector,
- the electrical solenoid.
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DIESEL EQUIPMENT
Specifications
13
Vehicles GearboxEngine
Type SuffixBore
(mm)Stroke
(mm)Capacity
(cm
3)RatioCatalytic
converterDepollution
standard
XC0D JB F8Q 662 80 93 1 870 21.5/1 C67 EU96
XC0E JB F8Q 630 80 93 1 870 21.5/1 C67 EU96
Vehicles
ENGINE SPEED (rpm)
Idle speedno load
maximumfull load
maximum
SMOKE OPACITY
Homologation value Legal maximum
XC0D 825 ± 50 4 600 ± 100 4 100 ± 100 1.05 m
-1 (35 %) 2.5 m -1 (64 %)
XC0E 825 ± 50 4 600 ± 100 4 100 ± 100 1.11 m
-1 (36 %) 2.5 m -1 (64 %)
Temperature in °C (± 1°) 0 20 40 80 90
Air temperature sensor
Siemens CTN type
Resistance in Ohms7470 to
119703060 to 4045 1315 to 1600 - -
Coolant temperature sensor
Siemens CTN type
Resistance in Ohms- 3060 to 4045 1315 to 1600 300 to 370 210 to 270
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DIESEL EQUIPMENT
Location of components
13
1 EGR valve and solenoid valve
2 Air temperature sensor (white connector)
3 Coolant temperature sensor (white connector)
4 Diesel injection computer
5 Fuel filter
6 Pre-postheating plug relay housing
7 TDC sensor
8 Fast idle solenoid valve
9 Electrical solenoid / coded solenoid
10 Digital DPC injection pump
11 Load potentiometer
12 Advance solenoid valve
13 Altimetric corrector
14 Injector with sensor (needle lift)
12874
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DIESEL EQUIPMENT
Location of components
13
12Advance solenoid valve
14Injector with sensor
13Altimetric corrector
11Load potentiometer
9Electrical solenoid / coded solenoid valve
8Idle speed solenoid valve
12869-1R
3Coolant temperature sensor
2Air temperature sensor
6Pre-postheating plug relay housing
5Fuel filter
16Inertia switch
4Injection computer
13083R
12872R
19 EGR solenoid valve
12871R
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DIESEL EQUIPMENT
Pre-postheating control
13
The pre-postheating function is controlled by the
computer, which controls the preheating plug re-
lay housing.
1) Ignition - Preheating
The preheating process is divided in two
phases :
a) Variable preheating
This is dependent on the coolant tempera-
ture, on the battery voltage and on alti-
tude (internal computer sensor) when the
ignition is switched on (the preheating
warning light illuminates).b) Fixed preheating
After the preheating warning light has
extinguished (variable preheating), the
plugs remain fed for 8 seconds before the
engine is started.
2) Starting the engine
During the action of the starter motor, the
four plugs are fed continuously.
3) Engine running - Postheating
The postheating also may be divided in two
phases:
a) Fixed postheating
After starting the engine, the plugs are
supplied simultaneously for a period of 10
seconds.
b) Variable postheating
Variable postheating begins when fixed
postheating ends. The time during which
the plugs are fed (continuously) depends
upon :
- the coolant temperature
- the engine speed ,
- the load (load potentiometer on pump
lever ).
Maximum preheating limit (battery vol-
tage lower than 9.3 volts and altitude hi-
gher than 2 000 m).
Minimum preheating limit (battery
voltage greater than 10.5 volts altitude
lower than 350 m).
13041S
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DIESEL EQUIPMENT
Pre-postheating control
13
- 20 180time (s)
For an idle speed and load lever
position
Coolant temperature °C0204060
Variable postheating may be interrupted :
- permanently, if the coolant temperature is >
60°C,
- temporarily , if the unit receives full load
information for more than 3 seconds; the
function is established once again if the
engine returns to idle speed or low load,
- temporarily again if the battery voltage is
>16 V; the function is restored if Ubatt
< 15 V.
In all cases, the total duration of the postheating
function will never exceed 3 minutes.
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DIESEL EQUIPMENT
Fast idle speed control
13
- if the engine speed falls to 650 rpm and the
vehicle speed is lower than 15 mph (25 km/h)
(engine start improvement programming).
The fast idle speed is cut off once the speed
becomes > 850 rpm
NOTE :
- Fast idle speed operational :
• solenoid valve not operated,
• cable loose, and not tensioned.
- Nominal idle sped :
• solenoid valve operated
• cable tensioned
SPECIAL FEATURES : once the AC has been
selected on the instrument panel, the fast idle
speed function is activated. The fast idle speed function is controlled by the
computer via a solenoid valve operating the dia-
phragm (versions with or without air conditio-
ning).
The fast idle speed control becomes operational :
- if, on switching on the ignition, the coolant
temperature is below 10°C,
Coolant
temperature
on switching
ignition on (°C)Fast idle speed
cut-off
temperature
(°C) Fast idle speed
cut-off
temperature
(°C)
10
5
0
- 10
- 2020
20
30
40
5011
15
20
25
30
F8Q 662F8Q 630
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DIESEL EQUIPMENT
Computer
13
PRM1316
CONNECTION
1-<-
2-----
3-----
4-->-
5-->-
6-->-
7-<--
8-<--
9-->-
10-<--
11-<--
12-<--
13-><-Computer supply
Computer earth
Sensor earth
Potentiometer lever supply
EGR solenoid control
Advance corrector control
Needle lift signal
Engine speed signal
Preheating warning light control
Fault finding information line L
AC status
Vehicle speed signal
Fault finding information line KPlug relay control
Altimetric corrector relay control
Fast idle speed control
Load lever position information
Fault finding warning light control
AC prevention control
Power assisted steering pump assembly
relay control
Engine speed information
Not used
Load lever signal
Air temperature signal
Coolant temperature signal14-->-
15-->-
16-->-
17-->-
18-->-
19-->-
20 -->-
21-----
22
23-<--
24-<--
25-<--
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