start stop button RENAULT SCENIC 2008 J84 / 2.G Passenger Comparment Connection Unit Workshop Manual

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-24
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-24V9 MR-372-J84-87B000$086.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
3) The UCH decrypts the response and compares it with that stored in its memory. If the result is correct, it continues
the starting procedure. The aerials stop transmitting once the card is authenticated.
If no Renault card responds in hands-free mode, the UCH interrogates the card reader. If the Renault card is in the
card reader, authentication is via transponder.
The card reader must be used to start in hands-free mode in the following situations:
–flat card battery,
–vehicle in an area of frequency interference,
–boot open (indication on instrument panel).
The statuses and commands available on the card authentication function:
–ET035 Radio frequency signal received.
–ET070 Start button.
–ET046 Immobiliser.
–ET014 Power supply level requested.
–AC036 Internal aerial testing.
b) Authentication of the Renault card when the vehicle is not fitted with the hands-free option:
When the user presses the start button, the UCH authenticates the card in the card reader using the transponder
mode (short-range data exchange at 125 KHz). The transponder mode does not require a battery in the card.
1Wire connection
2Card reader
3Short range TRANSPONDER connection
4Renault Card
The statuses and commands available on the card authentication function:
–ET070 Start button
–ET046 Immobiliser
–ET014 Power supply level requested

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-35
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - System operation
87B
87B-35V9 MR-372-J84-87B000$086.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
1.4.3 Main components of the STARTING sub-function:
The starting sub-function is based on the following main factors:
–The starting conditions being present.
–Passenger Compartment Control Unit (UCH).
–The automatic gearbox computer (if fitted on the vehicle).
–The Protection and Switching Unit.
1.4.3.1 Start button:
The start button transmits the driver's requests to start or stop the engine to the UCH.
1.4.3.2 The UCH:
The UCH ensures that the starting conditions are met, and that no other computer on the multiplex network is
inhibiting starting of the vehicle.
If the conditions are met, it requests control of the starter from the UPC.
1.4.3.3 The Protection and Switching Unit (UPC):
The Protection and Switching Unit activates the starter motor following a request from the UCH via the multiplex
network.
1.4.3.4 Neutral sensor (manual gearbox):
Informs the UCH of the position of the gearbox (neutral or gear engaged).
1.4.3.5 Clutch switch (manual gearbox):
Sends clutch pedal depressed signal (end of travel) to the UCH.
1.4.3.6 Brake switch:
Sends brake pedal depressed signal to the UCH.
Operation:
The unknown status does not automatically require the brake pedal to be replaced, because it is a temporary
operating status between released pedal status and depressed pedal status (see diagram above).

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -123
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -123V9 MR-372-J84-87B000$387.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
KEYLESS VEHICLE FUNCTION
Sub-function: Protection
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
ProtectionET070:Start buttonPRESSED
RELEASED In the event of a fault,
consult the
interpretation of
status ET070.
ET008:blank UCHYES = If the UCH is blank.
NO = If the UCH is
programmed. In the event of a fault,
consult the
interpretation of
status ET008.
PR013:Number of cards
programmed1, 2, 3 or 4None
ET071:Unprogrammed
steering column lockYES
NO In the event of a fault,
consult the
interpretation of status
ET071.
ET119:UCH request to
steering column lockLOCKING UNLOCKINGNone
ET248:Steering column
lock immobiliser
codeINCORRECT
OKNone
ET073:Steering column
lock sensor signalFAULTY
UNLOCKED
UNDETERMINED
FALSELY TRIGGERED
SHORT CIRCUITIn the event of a fault,
consult the
interpretation of status
ET073.
ET072:Steering column
lockINCONSISTENCY
LOCKED
UNLOCKEDIn the event of a fault,
consult the
interpretation of status
ET072.
ET014:Control power levelNONE
ACCESSORIES FEED
TIMED
APCNone

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -125
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check
87B
87B -125V9 MR-372-J84-87B000$387.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
KEYLESS VEHICLE FUNCTION
Sub:function: Starting
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
StartingET070:Start buttonDEPRESSED
RELEASED In the event of a fault,
consult the
interpretation of status
ET070.
ET108:Automatic gearbox
lever positionNOT IN NEUTRAL
P
NEUTRAL, REVERSEIn the event of a fault,
consult the
interpretation of status
ET108.
ET048:Clutch pedal
positionDEPRESSED
RELEASEDIn the event of a fault,
consult the
interpretation of status
ET048.
ET047:Brake pedal positionUNDETERMINED
RELEASED
DEPRESSED
INCONSISTENCY In the event of a fault,
consult the
interpretation of status
ET047.
ET110:UCH request to
injection or
Protection and
Switching UnitENGINE OFF
INACTIVE
APC
STARTING In the event of a fault,
consult the
interpretation of status
ET110.
ET169:EngineSTOPPEDIn the event of a fault,
refer to the
interpretation of
status ET169.

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses87B
87B - 226
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses87B
87B - 226V9 MR-372-J84-87B000$559.mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ET110
UCH REQUEST TO INJECTION COMPUTER OR PROTECTION
AND SWITCHING UNIT
NOTESNo faults should be present or stored.
This status gives information concerning the type of request made by the UCH to these computers.
"ENGINE STOP": when an engine stop is requested.
"INACTIVE": without action on the vehicle.
"+ AFTER IGNITION FEED": on pressing the start button for more than 5 seconds.
"START": when starting is requested.
If the status does not correspond to the current user request, carry out a test of the multiplex network.
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_ET110/UCH_V48_ET110/UCH_V4C_ET110/
UCH_V4D_ET110/UCH_V4F_ET110/UCH_V50_ET110

PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Fault Finding Chart
87B
87B -370
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Fault Finding Chart
87B
87B -370V9 MR-372-J84-87B000$989mif
UCH
Vdiag No.: 44, 48,
4C, 4D, 4F, 50
ALP45 Impossible to stop engine
NOTESOnly check this customer complaint after performing a complete check with the
diagnostic tool.
Check whether the engine switches off if the Start button is pressed twice.
If it does, make sure the card is not considered absent by the UCH, particularly by checking for messages on the
instrument panel.
Check that the button presses are detected correctly by the UCH using status ET070 Start button.
If not, see the procedure for dealing with this status.
Check that status ET110 UCH request to injection or UPC is STOP when the button is pressed.
If there is a fault, see the procedure for this status.
Check the consistency of parameter PR008 Vehicle speed with the vehicle stationary.
If not, run fault finding on the ABS.
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out a complete check with the diagnostic tool.
UCH_V44_ALP45 /UCH_V48_ALP45/UCH_V4C_ALP45/
UCH_V4D_ALP45/UCH_V4F_ALP45/UCH_V50_ALP45