relay RENAULT SCENIC 2000 J64 / 1.G Technical Note 3426A Workshop Manual

Downloaded from www.Manualslib.com manuals search engine ENGINE AND PERIPHERALS
Engine and transmission assembly
10
10-5
– the closure panel for the plenum chamber.
Remove (all types):
– the shock absorber cap protectors,
– the clutch cable,
– the brake servo vacuum pipe,
– the air intake pipe,
– the turbocharging air ducts between the exchanger
and the engine,
– the hoses on the heater radiator,
– the pipes (6) and the connectors (7),– the battery mounting,
– the expansion bottle mountings and the expansion
bottle,
– the precatalytic converter mountings and the
precatalytic converter,
– the relay plate at (1) and the fuse holder (2) as well
as the connectors (3) and (4),
– the injection computer connectors (8),
– the earth strap (9),
– the fuel pipes (10) and fit cleanliness plugs.
11036R2
16869R
16872R
16870R

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Injection warning light
13
13-12
Injection warning light
Vehicles using the high pressure diesel system are fitted with two injection warning lights used during the preheating
phase and in case of an injection fault (or engine overheating).
WARNING LIGHT PRINCIPLE
!When ignition is switched on, the preheating light is lit during the preheating phase and then goes out (see section
13 "Pre-postheating control").
!When there is a fault on the injection system the "fault" warning light lights up. These faults are:
– internal computer fault,
– engine speed fault (the vehicle doesn't start),
– main relay or low pressure fault (the vehicle doesn't start),
– injector fault,
–TDC sensor coherence fault and camshaft sensor,
– rail pressure sensor fault,
– rail pressure regulator fault,
– accelerator potentiometer fault,
– engine immobiliser fault,
– computer supply voltage fault,
– engine overheating.
NOTE: the OBD warning light (symbolised by an engine), visible when the ignition is switched on, is never visible
when the engine is running.

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Thermal plunger
13
13-19
Thermal plunger
The three thermal plungers are located on a water unit
fixed under the manifold at the engine - gearbox joint.
The objective of the system is to reheat the coolant.
The thermal plungers are supplied with 12 volts by
two relays. One relay controls two thermal plungers,
and the other relay controls one thermal plunger. This
enables control of one, two or three thermal plungers
as required.
The resistance of the thermal plungers is:
0.45 ± 0.05 Ω at 20˚C. Control strategy
When the thermal plungers are operating the idling
speed is brought to 900 rpm.
Thermal plungers cannot operate in the case of:
– preheating,
– post heating,
– heated windscreen selected,
– engine speed below 700 rpm.,
If the conditions mentioned above apply, the thermal
plungers are controlled according to a characteristics
map linked to the air and coolant temperature.
Unshaded zone: Thermal plunger not supplied
Shaded zone: Thermal plunger supplied

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Coolant temperature management
13
13-41
Coolant temperature management
CCTM
This system allows the engine cooling fan to be
controlled by the injection computer. It consists of a
single coolant temperature sensor serving injection,
the engine cooling fan, the temperature indicator and
the instrument panel temperature warning light.OPERATION
The injection computer controls, as a function of the
coolant temperature:
– the injection system,
– the engine cooling fan relays:
!the fan is kept at a low speed if the coolant
temperature exceeds 99 ˚C and stops when the
temperature drops below 96 ˚C,
!the fan is kept at a high speed if the coolant
temperature exceeds 102 ˚C and stops when the
temperature drops below 99 ˚C,
!the fan can be controlled by the air conditioning.
For vehicles without air conditioning, only the low
speed engine cooling fan is operational.
COOLANT TEMPERATURE WARNING LIGHT
(shared with the injection fault warning light)
The warning light is controlled by the computer.
It is illuminated when the temperature exceeds 120 ˚C.
16179R1
244 Coolant temperature sensor (injection and
coolant temperature indication on the
instrument panel).
Three track sensor, two tracks for coolant
temperature information and one track for
indication on the instrument panel.

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Computer
13
13-42
Computer
TRACK ASSIGNMENT
Connector A
H2
H3
H4
G1
G2
G3
G4
F1
F3
F4
E1
E2
E3
E4
D3
D4
C1
C3
B1
B3
A3---
→
→
→
←
→
←
←
←
→
---
←
→
←
→←
→
←
→←
→
---
---THROTTLE POTENTIOMETER SUPPLY (TRACK 2)
OBD WARNING LIGHT
COOLANT TEMPERATURE WARNING OUTPUT
PREHEATING WARNING LIGHT OUTPUT
IMMOBILISER INPUT
FAULT WARNING LIGHT OUTPUT
POWER CONSUMED
THROTTLE POTENTIOMETER INPUT (TRACK 2)
FUEL CUT-OFF SOLENOID INPUT
AIR CONDITIONING INHIBITION OUTPUT
THROTTLE POTENTIOMETER SUPPLY (TRACK 1)
CLUTCH BREAKER INPUT
CONSUMPTION INFORMATION OUTPUT
VEHICLE SPEED INPUT
FAULT FINDING
ENGINE SPEED INFORMATION
THROTTLE POTENTIOMETER INPUT (TRACK 1)
FAULT FINDING
HEATED REAR WINDSCREEN INPUT
THROTTLE POTENTIOMETER EARTH (TRACK 1)
THROTTLE POTENTIOMETER EARTH (TRACK 2)
Connector B
B3
B2
C3
C2
C1
D4
D3
D1
E3
E1
F2
G3
G2
G1
H4
H3
H2
J3
J2
K3
L4
L3
L2
L1
M4
M3
M2
M1←
---
→
←
←
→
←
←
---
---
---
←
---
---
←
←
---
←
---
←
---
---
→
→
---
---
---
→PLUGS DIAGNOSTICS INPUT (1)
EGR POTENTIOMETER POSITION EARTH
PREHEATING RELAY CONTROL
EGR POTENTIOMETER POSITION SIGNAL INPUT
TURBOCHARGER PRESSURE INPUT SENSOR
SUPPLY RELAY CONTROL OUTPUT
AIR TEMPERATURE SENSOR INPUT
DIESEL PRESSURE INPUT SENSOR
+ AFTER IGNITION FEED
COOLANT TEMPERATURE SENSOR EARTH
EGR POTENTIOMETER POSITION SUPPLY
ENGINE SPEED SIGNAL SENSOR
AIR FLOW METER SUPPLY
FUEL TEMPERATURE SENSOR EARTH
AIR FLOW METER SIGNAL INPUT
ENGINE SPEED SIGNAL SENSOR
DIESEL PRESSURE SUPPLY SENSOR
FUEL TEMPERATURE INPUT
TURBOCHARGER PRESSURE SUPPLY SENSOR
COOLANT TEMPERATURE SENSOR INPUT
POWER EARTH
POWER EARTH
TURBO PRESSURE SOLENOID VALVE CONTROL OUTPUT
PRESSURE REGULATOR SOLENOID VALVE CONTROL OUTPUT
POWER EARTH
+ AFTER RELAY
+ AFTER RELAY
EGR SOLENOID CONTROL OUTPUT

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Computer
13
13-43
Connector C
A4
A3
A2
A1
B4
B3
C1
E4
J4
K4
L4
L3
L2
L1
M4
M3
M2
M1---
---
→
→
→
---
---
→
→
←
→
---
---
→
---
---
→
→TURBOCHARGER PRESSURE SENSOR EARTH
FLOW METER EARTH
LOW SPEED FAN RELAY CONTROL OUTPUT
ELECTRIC FUEL PUMP CONTROL OUTPUT
HIGH SPEED FAN RELAY CONTROL OUTPUT
DIESEL PRESSURE SENSOR EARTH
CAMSHAFT POSITION SENSOR EARTH
ADDITIONAL HEATING CONTROL OUTPUT
ADDITIONAL HEATING CONTROL OUTPUT
CAMSHAFT POSITION SIGNAL SENSOR
INJECTOR 2 CONTROL
INJECTOR 2 SUPPLY
INJECTOR 3 SUPPLY
INJECTOR 4 CONTROL
INJECTOR 4 SUPPLY
INJECTOR 1 SUPPLY
INJECTOR 3 CONTROL
INJECTOR 1 CONTROL