RENAULT TWINGO 2009 2.G Engine And Peripherals Passenger Compartment Connection Unit OBD Workshop Manual

87B -141
MR-413-X44-87B000$624.mif
V5
UCH
Vdiag No.: 44PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses87B
AFTER REPAIRRepeat the conformity check from the start.
Carry out fault finding on the system.
Special feature: Depending on the vehicle equipment, an additional fuse and diode are present on the
wiring: ET463
CONTINUED 2
Check the insulation, continuity and the absence of interference resistance of the following connections:
Central door locking/warning switch check (component code 1391):
●Connection code 20AW between components 645 and 1391.
●Connection code 20M between components 645 and 1391.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If the connections are correct, replace the central door locking/warning switch (component code 1391).
(See MR 411 Mechanical 84A, Control - Signals, Hazard warning lights and central door locking:
Removal - Refitting).
With the engine running, check that the door
open warning (buzzer) is active when the driver
door is open and the lights are on.
Is the warning active?
NO
Check the continuity of connection H24 between
components 140 and 1016 and between
components 119 and 1016.
Is the continuity correct?
NO
C
YESB

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MR-413-X44-87B000$624.mif
V5
UCH
Vdiag No.: 44PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses87B
ET463
CONTINUED 3
Check for the driver's door signal
separation diode in the passenger
compartment fuse box (location 46 in the
relay and fuse box) and the conformity of
fuse 2A (location 45 in the relay and fuse
box), which are inserted between the
driver's door switch and the UCH.
Are the diode and fuse present and
correct?
C
YESA
NO
D
AFTER REPAIRRepeat the conformity check from the start.
Carry out fault finding on the system.

87B -143
MR-413-X44-87B000$624.mif
V5
UCH
Vdiag No.: 44PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses87B
ET463
CONTINUED 4
Check that the diode is fitted the right way
round (in accordance with the foolproofing
device).
Is the diode fitted the wrong way round?
Fit a diode the right way round in the correct
location in the passenger compartment fuse
box.
(see MR 411 Mechanical, 81C, Fuses,
Fuses: List and location of components)
A disconnected earth causes damage to
the fuse. If the diode and/or the fuse are
damaged, the tailgate earth (MYH) and the
passenger door earth (MAN and MAM)
should be checked.
If the earths are correct, replace the
diode and/or the fuse in the passenger
compartment fuse box (see MR 411
Mechanical, 81C, Fuses, Fuses: List and
location of components)Check the continuity of connection 86H between
components 1016 and 645.
If the connection or connections are faulty and there is
a repair procedure (see Technical Note 6015A,
Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise replace it.
If the wiring is in order, replace the driver's door switch
(component code 140) (see MR 411 Mechanical
systems, 81B, Interior lights, Door switch:
Removal - Refitting)
A
YES
NO
B
DB
AFTER REPAIRRepeat the conformity check from the start.
Carry out fault finding on the system.

87B -144
MR-413-X44-87B000$672.mif
V5
87B
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Parameter summary table
Tool parameter Diagnostic tool title
PR002External temperature
PR056Number of keys allocated
PR073Alternator charge signal
PR074Battery setpoint voltage
PR075Alternator setpoint voltage
PR076Battery voltage after rest
MR-413-X44-87B000$672.mif
UCH
Vdiag No.: 44

87B -145
MR-413-X44-87B000$720.mif
V5
87B
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of parameters
PR002
EXTERNAL TEMPERATURE
NOTESOnly apply the checks if the parameter is inconsistent.
Special notes:
Check that LC002 "External temperature sensor" is "WITH". Otherwise perform
CF029 "External temperature sensor".
Check that LC067 "External temperature display" is "WITH". Otherwise perform
CF171 "External temperature display".
Note:
If the exterior temperature sensor (component code 245) is disconnected or the vehicle is not equipped with an
exterior temperature sensor, the temperature displayed is the default temperature of 215 ˚C.
Check the 12-track temperature sensor connector, (component code 245) (tabs bent, oxidised, broken, etc.).
Check the PE2 40-track connector of the UCH, component code 645 (tabs bent, oxidised, broken).
If the connector is faulty and there is a repair method (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
Check the insulation, continuity and the absence of interference resistance on the following connections:
●Connection code 47D between components 240 (for left-hand drive vehicles) or 239 (for right-hand drive
vehicles) and 645.
●Connection code 47C between components 240 (for left-hand drive vehicles) or 239 (for right-hand drive
vehicles) and 645.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Measure the resistance of the connector sensor disconnected from connections 47C and 47D.
Temperature (˚C)
1
5
10
15
20
25
30
35Sensor resistance (Ω) ± 50 Ω
5980
5020
4280
3530
2900
2300
2010
1620
Replace the exterior temperature sensor (component code 245) if not correct. (See MR 411 mechanical
systems 62A, air conditioning, Exterior air temperature sensor: Removal - Refitting).
If the fault is still present, contact Techline.
UCH_V44_PR002
MR-413-X44-87B000$720.mif
UCH
Vdiag No.: 44

87B -146
MR-413-X44-87B000$720.mif
V5
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of parameters
UCH
Vdiag No.: 44
87B
PR056
NUMBER OF KEYS ALLOCATED
NOTESNo faults should be present or stored.
This parameter indicates the number of key(s) programmed by the UCH.
0 < PR056 < 4
If PR056 “Number of keys allocated” = 0, no key is allocated by the UCH.
Perform key allocation using command SC015 “Key allocation”.
If the fault is still present, contact Techline.
AFTER REPAIRRepeat the conformity check from the start.
UCH_V44_PR056

87B -147
MR-413-X44-87B000$720.mif
V5
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of parameters
UCH
Vdiag No.: 44
87B
PR073
ALTERNATOR CHARGE SIGNAL
NOTESNo faults should be present or stored.
Note:
In the event of a malfunction, the value will by 99.6% (engine running).
Depending on the battery charge status, the operating phase and the battery temperature, the UCH determines
what the voltage across the battery terminals should be.
When the battery charge drops, and PR076 Battery voltage after rest decreases, the UCH can temporarily
increase the PR075 Alternator setpoint voltage by 1 V and for a period of 15 minutes after switching on + after
ignition feed.
Before and during starting, PR075 Alternator setpoint voltage is fixed at 10.7 V.
A maximum of 30 seconds after the engine has started, the UCH sets PR075 Alternator setpoint voltage to the
optimum value calculated.
The injection computer can also control the alternator (component code 103) regulation voltage.
The injection computer sends the maximum authorised power delivered by the engine, to the UCH via the
multiplex network.
If the power available by the engine is less than the power consumed by the alternator (component code 103),
the UCH reduces PR075 Alternator setpoint voltage.
0 % < PR073 < 100 %
In the event of a fault, carry out a complete check on the battery and the charging circuit (see Technical Note
16A, Starting-Charging).
If the fault is still present, contact Techline.
AFTER REPAIRRepeat the conformity check from the start.
UCH_V44_PR073

87B -148
MR-413-X44-87B000$720.mif
V5
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of parameters
UCH
Vdiag No.: 44
87B
PR074
BATTERY SETPOINT VOLTAGE
NOTESNo faults should be present or stored.
Depending on the battery charge status, the operating phase and the battery temperature, the UCH determines
what the voltage across the battery terminals should be.
When the battery charge drops, and PR076 Battery voltage after rest decreases, the UCH can temporarily
increase the PR075 Alternator setpoint voltage by 1 V and for a period of 15 minutes after switching on + after
ignition feed.
Before and during starting, PR075 Alternator setpoint voltage is fixed at 10.7 V.
A maximum of 30 seconds after the engine has started, the UCH sets PR075 Alternator setpoint voltage to the
optimum value calculated.
The injection computer can also control the alternator (component code 103) regulation voltage.
The injection computer sends the maximum authorised power delivered by the engine, to the UCH via the
multiplex network.
If the power available by the engine is less than the power consumed by the alternator (component code 103),
the UCH reduces PR075 Alternator setpoint voltage.
In the event of a fault, perform a complete check on the battery and charging circuit (see 80A, Battery).
If the fault is still present, contact Techline.
AFTER REPAIRRepeat the conformity check from the start.
UCH_V44_PR074

87B -149
MR-413-X44-87B000$720.mif
V5
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of parameters
UCH
Vdiag No.: 44
87B
PR075
ALTERNATOR SETPOINT VOLTAGE
NOTESNo faults should be present or stored.
Depending on the battery charge status, the operating phase and the battery temperature, the UCH determines
what the voltage across the battery terminals should be.
When the battery charge drops, and PR076 Battery voltage after rest decreases, the UCH can temporarily
increase the PR075 Alternator setpoint voltage by 1 V and for a period of 15 minutes after switching on + after
ignition feed.
Before and during starting, PR075 Alternator setpoint voltage is fixed at 10.7 V.
A maximum of 30 seconds after the engine has started, the UCH sets PR075 Alternator setpoint voltage to the
optimum value calculated.
The injection computer can also control the alternator (component code 103) regulation voltage.
The injection computer sends the maximum authorised power delivered by the engine, to the UCH via the
multiplex network.
If the power available by the engine is less than the power consumed by the alternator, the UCH reduces PR075
Alternator setpoint voltage.
In the event of a fault, perform a complete check on the battery and charging circuit (see 80A, Battery).
If the fault is still present, contact Techline.
AFTER REPAIRRepeat the conformity check from the start.
UCH_V44_PR075

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MR-413-X44-87B000$720.mif
V5
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of parameters
UCH
Vdiag No.: 44
87B
PR076
BATTERY VOLTAGE AFTER REST
NOTESNo faults should be present or stored.
The battery voltage after rest represents the battery charge status.
9 V < PR076 < 14 V
In the event of a fault, perform a complete check on the battery and charging circuit (see 80A, Battery).
If the fault is still present, contact Techline.
AFTER REPAIRRepeat the conformity check from the start.
UCH_V44_PR076