Df893 RENAULT TWINGO 2009 2.G Electrical Equipment - Petrol Injection Workshop Manual

17B-15V7 MR-413-X44-17B000$030.mif
PETROL INJECTION
Fault finding – System operation17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
a. Nominal operation: two operating modes.
High temperature (low and medium load mode):
When the thermostat is not controlled, it opens at a temperature of around 108˚C (compared to 89˚C for a
conventional thermostat). This allows fuel consumption to be reduced at low engine loads due to an increase in the
engine operating temperature (as there is less friction).
Low temperature (high load mode):
When the engine is put under greater stress (high loads, high engine speeds), the computer supplies the resistor
(the thermostat is controlled) to obtain operating temperatures below 108˚C (typically between 75˚C and 90˚C).
When the thermostat is opening as expected, comfort and a suitable engine temperature are obtained.
Too avoid too many transitions, switching from one mode to another is subject to time delays (a few seconds to
switch from high temperature
→ low temperature mode and several minutes to switch from low temperature → high
temperature mode).
b. Defect operation: forcing of low temperature mode and/or limitation of engine torque.
Low temperature management is activated.
Low temperature defect mode is used when one of the following faults is present and stored. Defect mode is reset to
0 using the On/Off key. Note:
The engine management computer automatically controls the thermostat in certain conditions, with the
aim of protecting the engine:
–External temperature greater than approximately 30˚C,
–Recognition of accelerator pedal being fully depressed.
If there is a short circuit to earth or an open circuit on the thermostat (for example: a connector
disconnected, DF893 Controlled coolant thermostat circuit in CO: Open circuit), engine performance is
limited to protect the engine.
IMPORTANT:
–It is essential to follow the new procedure for bleeding the cooling circuit (see MR 392 and 385,
Mechanical systems, CLIO III and MODUS, 19A Cooling, Cooling circuit: Bleeding), to prevent major
overheating of the catalytic converter. This new procedure is applicable to D4F engines with
SIEMENS injection.
–Do not inverse the connections of the temperature sensor and the thermostat control when
dismantling or carrying out electrical tests (foolproofing by colour of connections).

17B-16V7 MR-413-X44-17B000$030.mif
PETROL INJECTION
Fault finding – System operation17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
–DF089 Inlet manifold pressure sensor fault 1.DEF: Signal inconsistency.
Or 2. DEF: Open circuit or short circuit.
Or 3. DEF: Non-compliance with emission control standards.
–DF091 Vehicle speed signal in 1.DEF: No multiplex signals or invalid values.
Or 2. DEF: Non-compliance with emission control standards.
–DF001 Coolant temperature sensor circuit in 1.DEF: Signal inconsistency.
Or 2. DEF: Open circuit or short circuit.
Or 3. DEF: Non-compliance with emission control standards.
–DF002 Air temperature circuit in 1. DEF: Open circuit or short circuit.
Or 2. DEF: Non-compliance with emission control standards.
–DF330 Pinking sensor circuit in 1.DEF: Open circuit or short circuit.
Or 2. DEF: Non-compliance with emission control standards.
–DF893 Controlled coolant thermostat circuit in CO: Open circuit.
Or CC.0: Short circuit to earth.
Or CC.1: Short circuit to + 12 volts.
Or 1. DEF: Non-compliance with emission control standards.
Engine torque limitation is activated.
If the fault is directly linked to the controlled thermostat (DF893 Controlled coolant thermostat circuit), the
thermostat is no longer controlled. It operates continuously, either in low temperature mode (instance of short circuit to
earth) or in high temperature mode (instance of open circuit or short circuit to the battery). The engine torque is limited
to limit heating and also to protect the engine by preventing overheating.
c. Functions affected by the presence of a controlled thermostat:
–Coolant temperature: 108˚C nominal, between 70˚C and 90˚C in defect mode or on loaded points.
–Coolant temperature fault finding: the fault finding setting for coolant temperature consistency has been adapted.
–Consumption: The function improves fuel consumption. Consequence: a fault with the function may lead to
inefficient consumption.
–Bleeding the circuit: A new procedure adapted to this innovation is described in MR 392 and 385, Mechanical
systems, CLIO III and MODUS, 19A Cooling, Cooling circuit: Bleeding.
–Coolant temperature display and illumination of the warning light on the instrument panel: During nominal
operation there is no impact as the temperature reference value is taken into account as well as the warning light
illumination thresholds. In the event of malfunction, see the summary table below.
–Fan unit and air conditioning: the fan unit activation threshold and the high temperature air conditioning
deactivation threshold are adapted in accordance with the temperature setpoint.
–Fault finding of controlled thermostat: Electrical fault finding is used. No operational fault finding:
A mechanical fault (such as jamming) will not be detected by the system.
–Performance: In the event of a fault, there is the option to switch the engine to reduced performance mode (see
Description of operation: Operation in defect mode). Note:
If a fault on the coolant temperature sensor is detected, fan assembly 1 is requested to operate permanently,
regardless of the management mode of the engine coolant temperature.

17B-42V7 MR-413-X44-17B000$120.mif
PETROL INJECTION
Fault finding – Fault summary table17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
* TA: Automatic Transmission
* RV/LV: Cruise control/Speed limiter function
Tool faultAssociated
DTCDiagnostic tool title
DF330325Pinking sensor circuit
DF361351Ignition coil circuit 1-4
DF362352Ignition coil 2-3 circuit
DF394420Catalytic converter operating fault
DF398170Fuel circuit operating fault
DF404C302ATX* or sequential gearbox multiplex connection
DF436300Detection of engine misfiring
DF455460Low fuel level signal
DF457315Flywheel target
DF5082101Motorised throttle valve control
DF559480Low speed fan assembly relay control
DF561481High-speed fan assembly relay control
DF5692263Turbocharger circuit (Vdiag 54 only)
DF603C167UCH multiplex connection
DF6121605Oil vapour anti-icing resistor circuit
DF623C315Closing brake signal
DF624C111UPC multiplex connection
DF6502299Accelerator pedal position signal
DF8930597Controlled coolant thermostat circuit (only for CLIO III or MODUS except
Vdiag 44)
DF1012585Multiplex signal consistency for RV/LV*
DF1058234Inlet pressure consistency (only for CLIO III or MODUS)
DF1072645Air conditioning compressor command relay (only for CLIO III or MODUS)

17B-162V7 MR-413-X44-17B000$133.mif
PETROL INJECTION
Fault finding – Interpretation of faults17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
Vdiag 4C only
DF893
PRESENT
OR
STOREDCONTROLLED COOLANT THERMOSTAT CIRCUITCO: Open circuit
CC.0: Short circuit to earth
CC.1: Short circuit to + 12 V
1.DEF: EOBD
NOTESPriorities when dealing with a number of faults:
Deal first with fault DF084 Actuator relay control circuit or DF046 Battery voltage
if they are present or stored.
Conditions for applying the fault finding procedure to stored faults:
The fault is considered present when the engine is running.
Special note:
Controlled coolant thermostat:
–For CO and CC.1:
Thermostat not controlled; temperature regulation performed at 110˚C.
–For CC 0:
Thermostat continuously controlled; temperature regulation performed at 90˚C.
Use Wiring Diagram Technical Note for CLIO III or MODUS.
Check the condition of the controlled coolant thermostat connector (see Technical Note Wiring Diagram, CLIO III
or MODUS, component code 1458).
Check the condition of the engine management computer connector (see Technical Note Wiring Diagram,
CLIO III or MODUS, component code 120).
If the connectors are faulty and if there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
If the fault is still present, check (with the ignition on) for + 12 V on connection 3FB of the controlled coolant
thermostat.
If the connection is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Use the "universal bornier" to check the insulation and continuity of the following connection:
●3VL between components 1458 and 120.
If the connection is faulty and if there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
SIM32_V4C_DF893
AFTER REPAIRFollow the instructions to confirm repair:
–If the fault is present, continue to deal with the fault.
–If the fault is stored, ignore it.
Deal with any other faults.
Clear the stored faults.

17B-251V7 MR-413-X44-17B000$153.mif
PETROL INJECTION
Fault finding – Interpretation of statuses17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 4C
ET672ENGINE COOLANT TEMPERATURE MANAGEMENT
STATUS
DEFINITIONWITHOUT: This status indicates that the engine coolant temperature control is not
managed.
ACTIVE: This status indicates that the engine temperature coolant temperature control
is active.
DEFECT MODE: This status indicates that the engine coolant temperature control is
in defect mode.
NOTESSpecial notes:
Perform these checks if the statuses correspond with the system operation
programming.
Conformity check: Engine stopped and ignition on, or engine running, and engine coolant
temperature > 80˚C
WITHOUTFor the D4F 740 engine, ET086 is WITHOUT.
D4F 764 and
D4F 784:
"ACTIVE"In the event of a fault, apply fault interpretation
–DF089 Inlet manifold pressure sensor circuit,
–DF154 Flywheel signal sensor circuit,
–DF001 Coolant temperature sensor circuit,
–DF002 Air temperature sensor circuit,
–DF893 Controlled coolant thermostat circuit.
"FAULTY"Indicates DEFECT MODE when a fault is detected:
–DF089 Inlet manifold pressure sensor circuit: 1.DEF: Signal inconsistency,
–DF154 Flywheel signal sensor circuit,
–DF001 Coolant temperature sensor circuit: 2.DEF: Inconsistency,
–DF002 Air temperature sensor circuit,
–DF893 Controlled coolant thermostat circuit.
SIM32_V4C_ET672
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.