13B-13V4 MR-372-J84-13B000$020.mif
DIESEL INJECTION
Fault finding – System operation13B
DDCR INJECTION
Vdiag No.: 44, 48
Cruise control/speed limiter management:
When activated, the cruise control function maintains the vehicle at a preselected speed, regardless of the driving
conditions encountered. Using the control buttons, the driver can increase or decrease the vehicle speed.
The cruise control function can be deactivated either by using the control buttons or by switching off the cruise
control function selection switch, or when system events are detected such as depressing the brake or clutch
pedals, or when system errors are detected such as an inconsistent vehicle speed or excessive vehicle
deceleration. The cruise control function can also be temporarily suspended when the driver wants to resume
control of the vehicle and exceed the selected cruising speed by depressing the accelerator pedal which then
exceeds the selected fuel flow. The cruising speed is resumed when the driver releases the accelerator pedal.
The cruise control function can be reactivated and the last cruising speed can be resumed after deactivating
the function for whatever reason until the vehicle ignition is switched off (i.e. for as long as computer supply not cut
off). The vehicle will then attempt to return to the cruising speed using a controlled vehicle acceleration rate.
When switched on (using the selection switch), the vehicle speed limiter function limits the vehicle speed to a preset
value. The driver controls the vehicle in the normal way using the accelerator pedal until the limit speed is reached.
If an attempt is made to exceed this speed, the system will ignore the pedal request and will control the vehicle
speed as the cruise control function would do, provided that the driver continues to press the accelerator pedal.
As with the cruise control function, the set speed can be altered by adjusting the control buttons, with single touches
or holding down.
For safety reasons, the cruising speed can be exceeded by depressing the accelerator pedal beyond the pedal
position limiting value. Vehicle speed is then controlled using the accelerator pedal until the vehicle speed is
decreased to below the cruising speed, when the limiter function is activated again.
The driver has the following controls for the cruise control/speed limiter function:
– accelerator pedal,
– brake pedal,
– clutch pedal,
– function selector switch, used to select cruise control or speed limiter operating mode.
Instrument panel display
The computer displays certain information on the instrument panel relating to engine operation. This concerns 5
functions: the MIL (Malfunction Indicator Lamp) of the EOBD (European On Board Diagnostic), pre-postheating,
the coolant temperature, and engine faults: Level 1 (non-critical fault) and Level 2 (emergency stop). These five
functions are represented by 3 warning lights or messages displayed by the on-board computer.
Pre-postheating warning light
This light is used both as an in-operation indicator light and as a system fault indicator:
– permanently lit during + after ignition feed: indicates preheating of the heater plugs.
After preheating and an automatic timed 3 second off period, the warning light will come on if a Level 1 fault occurs
(leading to reduced operation and reduced safety levels. The driver should have repairs carried out as soon as
possible.)
13B-54
AFTER REPAIRDeal with any faults displayed by the diagnostic tool. Clear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
V4 MR-372-J84-13B000$061.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DDCR INJECTION
Vdiag No.: 44, 48
DF050
PRESENT
OR
STOREDBRAKE SWITCH CIRCUIT
1.DEF: No signal.
2.DEF: Inconsistency.
NOTESConditions for applying the fault finding procedure to a stored fault:
The fault is declared present when the ignition is switched on, when decelerating or when
the brake pedal is depressed.
Deal with the fault even if it is stored.
Check the connection and condition of the switch connector.
Repair if necessary.
Check for the +12 V feed on the switch supply.
Repair if necessary.
Check the connection and condition of the black 32-track connector A and grey 32-track connector C of the
computer.
Repair if necessary.
Check that the switch is working.
Repair if necessary.
Check the insulation, continuity and the absence of interference resistance on the following connections:
Brake light switch track 1 and 3 + after ignition feed.
Brake light switch track 4Track E4 computer connector A
Repair if necessary.
DDCR_V44_DF050/DDCR_V48_DF050
13B-142
AFTER REPAIRCarry out a road test followed by another check with the diagnostic tool.
V4 MR-372-J84-13B000$090.mif
DIESEL INJECTION
Fault finding – Interpretation of statuses13B
DDCR INJECTION
Vdiag No.: 44, 48
ET704
ET705
CONTINUED
ACTIVE
OR
INACTIVE
If the brake lights are working:
check the continuity and the absence of interference resistance on the following
connection:
– connection code 5A between components 160 and 120, 645, 119.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair) repair the wiring, otherwise replace it.
If the brake lights are not operational, check:
– the condition and fitting of the brake switch,
– the condition and conformity of the brake light fuse,
– the conformity of the values in the following table:
disconnect the switch and carry out the following checks:
for MEGANE II and SCENIC II with ESP
Continuity between
connectionsInsulation between
connections
Switch engaged
(Brake pedal released)5A and BPT 65G and SP17
Switch released
(Brake pedal depressed)65G and SP17 5A and BPT
For MEGANE II and SCENIC II without ESP
Continuity between
connectionsInsulation between
connections
Switch engaged
(Brake pedal released)5A and BPT 65G and SP17
Switch released
(Brake pedal depressed)65G and SP17 5A and BPT
Replace the switch if the values obtained are not correct.
