inflation pressure RENAULT SCENIC 2008 J84 / 2.G Passenger Comparment Connection Unit Workshop Manual

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-47
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-47V9 MR-372-J84-87B000$129.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
SYSTEM OPERATION
–The valves are activated approximately 1 minute after the vehicle has been running at a speed above 12 mph
(20 km/h).
–During driving, the valves emit signals every minute.
–The valves remain active for 15 minutes after the vehicle stops, then switch to standby mode.
–In standby mode, the valves emit signals only if they detect a pressure difference between two successive
measurements exceeding 68 mbar or if the pressure difference since last emitting exceeds 68 mbar (due to tyre
cooling).
–The tyres are considered to be cold when the vehicle speed has been zero for 1h 45 min.
–The minimum time for detection of a leak is approximately 15 minutes.
–The message Inflate tyres for motorway is displayed only if the vehicle travels at more than 102 mph (170 km/
h) (as an indication) for 3 minutes and the pressure on at least one of the tyres is 400 mbar less than the
recommended pressure at low speed. This message is inactive if the tyres are inflated to motorway pressure,
irrespective of the vehicle speed.
–Alert thresholds:
–over-inflation when cold = recommended pressure + 700 mbar,
–over-inflation when hot = recommended pressure + 850 mbar,
–under-inflation = recommended pressure - 400 mbar,
–serious under-inflation = recommended pressure - 600 mbar,
–imbalance = difference in pressure between the left-hand and right-hand wheels on the same axle greater
than 500 mbar.
–Information messages for the driver:
–Stop! Tyre puncture + STOP warning light + wheel concerned is highlighted on instrument panel display +
buzzer.
–Adjust tyre pressure + the wheel concerned is highlighted on instrument panel display.
–Inflate tyres for motorway + four wheels highlighted on instrument panel display.
–Tyre sensor fault + the wheel concerned is erased.
–Electronic fault + "Service" warning light + the four wheels concerned disappear from the instrument panel
display.
–No display of the tyre inflation pressure on the instrument panel on MEGANE II.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
87B
87B-116
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
87B
87B-116V9 MR-372-J84-87B000$344.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
DF319
DF320
DF321
DF322
PRESENTFRONT LEFT-HAND WHEEL TYRE PRESSUREFRONT RIGHT-HAND WHEEL TYRE PRESSURE
REAR RIGHT-HAND WHEEL TYRE PRESSURE
REAR LEFT-HAND WHEEL TYRE PRESSURE
1.DEF: Over-inflation
2.DEF: Under-inflation
3.DEF: Puncture
NOTESThe system is likely to generate false warnings of a puncture or under-inflation
Deflate the wheel by approximately 500 mbar, then reinflate this wheel to the nominal pressure.
If the fault is still present, contact Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_DF319P/UCH_V48_DF319P/UCH_V4C_DF319P/UCH_V4D_DF319P/UCH_V4F_DF319P/UCH_V50_DF319P
UCH_V44_DF320P/UCH_V48_DF320P/UCH_V4C_DF320P/UCH_V4D_DF320P/UCH_V4F_DF320P/UCH_V50_DF320P
UCH_V44_DF321P/UCH_V48_DF321P/UCH_V4C_DF321P/UCH_V4D_DF321P/UCH_V4F_DF321P/UCH_V50_DF321P
UCH_V44_DF322P/UCH_V48_DF322P/UCH_V4C_DF322P/UCH_V4D_DF322P/UCH_V4F_DF322P/UCH_V50_DF322P

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -133
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -133V9 MR-372-J84-87B000$387.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
FUNCTION: TYRES
Sub-function: Tyre management
fr*: front,
rr*: rear.
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application condition: engine stopped, + after ignition feed present.
Sub-functionParameter or
Status
checked Action Display and Notes Fault finding
Tyre
management PR009:Fr* wheel low speed
recommended
pressure.
In barCheck that the values entered
are actually the recommended
ones (see MR 364 (Mégane II)
or MR 370 (Scénic II),
Mechanical, 35A, Tyre
pressure: Identification).
Otherwise, enter the
recommended pressures using
command VP005 Write
recommended pressures. PR010:Rr* wheel low speed
recommended
pressure.
PR012:Fr* wheel high speed
recommended
pressure.
PR011:Rr* wheel high
speed
recommended
pressure.
PR014:Left/right pressure
difference threshold0.5 bar
None. PR015:Low under-inflation
threshold- 0.4 bar
PR059:Puncture report
threshold- 0.6 bar
PR017:Cold over-inflation
threshold0.7 bar
PR018:Warm over-inflation
threshold0.8 bar

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -146
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -146V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET016
BUZZER ACTIVATION REQUEST
NOTESThere must be no present or stored faults.
Special note:
Status ET016 is STATUS 1 or STATUS 2 if the SSPP buzzer is activated. A tyre is
punctured or there is a severe under-inflation.
ET016 is STATUS 1.
Request for activation of the buzzer linked to display of a puncture warning message on the instrument panel.
Adjust the pressures of the four tyres to the recommended pressures. Repair or replace the tyre if necessary.
ET016 is STATUS 2.
Request for buzzer activation to warn the driver that the vehicle speed is too high when the vehicle has one or more
punctured tyres.
This signal is only valid for vehicles fitted with runflat tyres.
Adjust the pressures of the four tyres to the recommended pressures. Repair or replace the tyre if necessary.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_ET016/UCH_V48_ET016/ UCH_V4C_ET016/
UCH_V4D_ET016 /UCH_V4F_ET016/UCH_V50_ET016

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -158
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
87B
87B -158V9 MR-372-J84-87B000$473.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET032
ET033
ET034
ET035FRONT LEFT-HAND WHEEL VALVE SIGNAL
FRONT RIGHT-HAND WHEEL VALVE SIGNAL
REAR RIGHT-HAND WHEEL VALVE SIGNAL
REAR LEFT-HAND WHEEL VALVE SIGNAL
NOTESBefore carrying out any operation, apply the fault finding procedure (see Introduction).
Special note:
If a wheel is equipped with a tyre pressure sensor, precautions must be taken
when removing/refitting tyres.
Failure to take the precautions specified in Section 35 of Workshop Repair
Manual 364 (for Mégane II) or 370 (for Scénic II) could result in the sensor being
damaged, and potential operating faults in the tyre pressure monitoring system.
CORRECT:The sensor is operating correctly and the pressure is correct.
Absent:The UCH is not receiving the signal from the sensor.
Over-inflated:The sensor sends a "tyre over-inflated" signal.
Puncture:The sensor sends a "tyre severely under-inflated" signal (pressure - 0.6 bar) or a rapid pressure
loss signal.
Under-inflated:The sensor sends a "tyre under-inflated" signal.
STEP 1
Start by checking the tyre inflation and if necessary restore to the recommended pressure.
Next, to ensure that the wheel sensors are functioning properly, at each conformity check, make sure all sensors
really are transmitting. To do this, create a tyre leak and check that its status changes:
Initial status = over-inflated deflate Final status = Correct or puncture or under-inflated
Initial status = puncture or under-inflated inflate Final status = Correct or over-inflated
AFTER REPAIRDeal with any other possible faults.
Switch off the ignition and carry out a road test followed by a test with the diagnostic
tool.
UCH_V44_ET032/UCH_V48_ET032/UCH_V4C_ET032/UCH_V4D_ET032/UCH_V4F_ET032/UCH_V50_ET032/UCH_V44_ET033/
UCH_V48_ET033/UCH_V4C_ET033/UCH_V4D_ET033/UCH_V4F_ET033/UCH_V50_ET033/UCH_V44_ET034/UCH_V48_ET034/
UCH_V4C_ET034/UCH_V4D_ET034/UCH_V4F_ET034/UCH_V50_ET034/UCH_V44_ET035/UCH_V48_ET035/UCH_V4C_ET035/
UCH_V4D_ET035/UCH_V4F_ET035/UCH_V50_ET035

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Parameter summary table87B
87B - 240
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Parameter summary table87B
87B - 240V9 MR-372-J84-87B000$645.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Parameter summary table
Tool parameter Diagnostic tool title
PR001Battery voltage
PR002External temperature
PR003Front left-hand wheel pressure
PR004Front right-hand wheel pressure
PR005Rear right-hand wheel pressure
PR006Rear left-hand wheel pressure
PR008Vehicle speed
PR009Front wheel low speed recommended pressure
PR010Rear wheel low speed recommended pressure
PR011Rear wheels high-speed recommended pressure
PR012Front wheel high speed recommended pressure
PR013Number of cards programmed
PR014Left/right pressure difference threshold
PR015Low under-inflation threshold
PR017Cold over-inflation threshold
PR018Warm over-inflation threshold
PR019Front left-hand tyre temperature
PR020Front right-hand tyre temperature
PR021Rear right-hand tyre temperature
PR022Rear left-hand tyre temperature
PR023Heat difference threshold between wheels
PR059Puncture report threshold
MR-372-J84-87B000$645.mif

87B-385
AFTER REPAIRCarry out a complete check with the diagnostic tool.
V9 MR-372-J84-87B000$990.mif
87B
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
Note: In Vdiag 44 vehicles, the Service warning light comes on with the instrument panel message.
ALP 52"Adjust tyre pressure" message appears
(the wheel concerned is highlighted on the display)
NOTESCheck that all the faulty tyres are fitted with tyre pressure monitor valves.
Make sure the tyre has the recommended
pressure specified on the label or in the
driver's handbook (not under- or over-
inflated).
Are the tyres at the recommended
pressures?Readjust the tyre inflation pressure.
Read the pressures in PR003
to PR006.
Do PR003 to PR006 match
the readings taken with the
pressure gauge (to within
0.2 bar)?Read the recommended
pressures in the UCH
(PR009 to PR012)
Do the values of these
parameters match the
manufacturer's
recommended
pressures?Write the recommended
pressures with command
VP005 Enter
recommended
pressures.
Program the four valve codes and reinstall the coloured rings in the
position indicated on the label on the driver's side.
NO
YES
YES
NO
ANO
YES
UCH_V44_ALP52 / UCH_V48_ALP52 / UCH_V4C_ALP52 / UCH_V4D_ALP52 / UCH_V4F_ALP52 / UCH_V50_ALP52
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Fault Finding Chart

87B-391
AFTER REPAIRCarry out a complete check with the diagnostic tool.
V9 MR-372-J84-87B000$990.mif
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Fault Finding Chart
87B
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ALP 56"Stop! Tyre puncture" message appears
(the wheel is highlighted on the display)
NOTESNone.
Is the tyre punctured?Repair the tyre.
Check the pressure in all 4 tyres with a
pressure gauge (problem: severe under-
inflation).
Is the pressure correct?
Make sure the valve seal is not damaged.
Check that the sealing nut on the valve is one for
valves installed on the Mégane II or Scénic II, and
not one for a Laguna II, Vel Satis or Espace IV. Read the recommended pressures in the UCH
(PR009 to PR012).
Do the values of these parameters match
the manufacturer's recommended
pressures?
After all these checks, if the message still appears
on the instrument panel, contact Techline.
Write the recommended
pressures with command VP005
Enter recommended pressures.
Contact the Techline.
YES
NO
NO
YES
NOYES
UCH_V44_ALP56 / UCH_V48_ALP56 / UCH_V4C_ALP56 / UCH_V4D_ALP56 / UCH_V4F_ALP56 / UCH_V50_ALP56