coolant temperature RENAULT KANGOO 1997 KC / 1.G Engine And Peripherals User Guide

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
13-33

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.
13-34

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
13-35

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-<--
13-37

DIESEL EQUIPMENT
Defect modes
13
If there is a fault with one of the components listed below, the computer enters "defect mode", which means
that replacement values are used to ensure engine operation.
Faulty
componentSet values (for replacement)
Advance
corrector Pre-postheating
timeEGR function Fast idle speed AC function
Coolant sensorRunning time
functionPreheating : -
30°C
Postheating :
80°CCutRunning time
function-
Air sensorTemperature
= 22°C- Cut - -
Load
potentiometer100 % load lever
positionPostheating:
30 % load lever
position Cut - 20 % load lever
position
Altitude sensorAltitude
= 900 mAltitude
= 900 mCut - -
Battery
16 V < U < 6 VUbatt = 13.5V Not controlled - - -
TDC sensorMinimum
advance
Solenoid valve
fully open
position Postheating :
Not controlled
until ignition is
switched off
then on againCutSpeed
= 2 000 rpmSpeed
= 2 000 rpm
Needle lift
sensorDefect mode
advance
(Carto soft
F8Q 662)
Maximum
advance
(F8Q 630)----
Vehicle speed
sensor--Position :
V = 175 km/hPosition :
V = 175 km/hPosition :
V = 175 km/h
Heater plugs
relay housing- Cut - - -
13-38

ANTIPOLLUTION
Fuel vapour rebreathing
14
CONDITION FOR BLEEDING THE CANISTER ( D7F
engine)
• Coolant temperature greater than+ 15 °C
•Air temperature greater than +10 °C.
• No load position not recognised (if there is a
fault in the throttle potentiometer sensor, the
condition of no load position not recognised is
replaced by an engine speed condition
R > 1500 rpm.).
It is possible to visualise the cyclical opening ratio
for the canister bleed solenoid using the
XR25
and #23. The solenoid is closed if #23 = 0.7 %
CONDITION FOR BLEEDING THE CANISTER (E7J
engine)
During richness regulation
Coolant temperature greater than 50°C.
Air temperature greater than 15°C.
No load position not recognised (if there is a fault
in the throttle potentiometer sensor, the
condition of no load position not recognised is
replaced by an engine speed condition
R > 1500 rpm.).
Outside richness regulation
•Coolant temperature greater than 50°C.
•Air temperature greater than 15°C.
•Full load position recognised (function of
engine speed and manifold pressure).
If there is a fault in the oxygen sensor, bleeding is
permitted outside of no load conditions.
It is possible to visualise the cyclical opening ratio
for the canister bleed solenoid using the
XR25
and #23. The solenoid is closed if #23 = 0.7 %
(minimum value).
14-4

ANTIPOLLUTION
Exhaust gas recirculation (EGR)
14
1 EGR valve
2 EGR solenoid (ON/OFF)
3 Vacuum pump
4 Engine
5 Exhaust manifold
6 Inlet manifold
7 Air filter
8 Injection computer
9 Coolant temperature sensor
13046R
F8Q Engine
13045R
14-11

ANTIPOLLUTION
Exhaust gas recirculation (EGR)
14
The EGR is controlled by the computer via an
ON/OFF solenoid valve.
The operation of the
EGR solenoid valve is de-
pendent upon the following parameters :
- the air temperature,
- the coolant temperature ,
- the altitude,
- the position of the load lever ,
- the vehicle speed ,
- the engine speed .
The EGR function is cut if :
- the air temperature < 16°C or
- the coolant temperature < 45°C or
- the engine speed/ load potentiometer value is
greater than a certain threshold .
The EGR is cut after operating at idle speed for 40
seconds (at zero vehicle speed).
Once the vehicle speed > 25 mph (40 km/h), the
EGR is operational again. It will be cut again after
40 seconds of operating at idle speed at zero ve-
hicle speed.
XR 25 bargraph 14 RH is illuminated if the EGR
function is permitted. In order to determine if the
EGR is actually controlled, use #24. if the value is
different from 0, the EGR is activated . F8Q Engine
14-13

INJECTION
General
17
1 Coil
2 Air filter
3 Oxygen sensor
4 Absolute pressure sensor
5 Throttle position potentiometer
6 Idle regulation stepping motor
7 Air temperature sensor
8 Injection computer
9 Inertia switch
10 Locking relay
11 Fuel pump relay
12 TDC sensor
13 Fuel vapour recycling solenoid valve
14 Coolant temperature sensor
15 Tool for removing spark plug leads
16 Pinking sensor
17 Power assisted steering pressostat
18 Pressure regulator
19 Anti-interference condenser
20 Fuel vapour absorber (canister)
LOCATION OF COMPONENTS
13081
D7F Engine
17-6

INJECTION
General
17
1 Fuel vapour recycling solenoid valve
2 Air filter
3 Pinking sensor
4 Absolute pressure sensor
5 Idle speed regulation stepping motor
6 Throttle position potentiometer
7 Air temperature sensor
8 Injection computer
9 Inertia switch
10 Fuel pump relay
11 TDC sensor
12 Coolant temperature sensor
13 Oxygen sensor
14 Coil for cylinders 2 - 3
15 Power assisted steering pressostat
16 Coil for cylinders 1 - 4
17 Fuel vapour absorber (canister)
18 Anti-interference condenser
LOCATION OF COMPONENTS
13082
E7J Engine
17-7