Page 17 of 86
MULTIMEDIA
Fault finding - Replacement of components86C
86C-16
NAV 4R
Program no.: 0000
Vdiag No.: 24
3. Enter the CD changer unlocking code (depending on options)
–If there is a CD changer, and when CD0000 is displayed, enter the code of the removed 4R Radio Navigation
system.
–After the unlocking code has been entered, the 4R Radio Navigation computer is in customer mode.
Note:
Each time an incorrect code is entered, the waiting time doubles (maximum 32 minutes).
Page 18 of 86
MULTIMEDIA
Fault finding - Fault summary table86C
86C-17
NAV 4R
Program no.: 0000
Vdiag No.: 24
Fault finding - Fault summary table
Tool faultAssociated
DTCDiagnostic tool title
DF001 9300Computer
DF021 9321Computer configuration
DF024 C155No instrument panel multiplex signal
DF026 C188No fold-out unit multiplex signal
DF027 C189No audio CD changer signals
DF030 9A00GPS aerial circuit
DF032 9308Display supply
DF034 9A0CCD reader
DF035 9305Computer/fold-out unit connection
Page 20 of 86
MULTIMEDIA
Fault finding - Interpretation of faults
86C
86C-19
NAV 4R
Program no.: 0000
Vdiag No.: 24
DF021
PRESENT
COMPUTER CONFIGURATION
1.DEF : Computer configuration not performed
NOTESNone.
Configure the system (see Configuration and programming).
Note:
After configuring, switch off the ignition, wait 2 minutes then switch on the ignition again to allow the configuration
to register.
Check that the configurations have been correctly registered by reading configurations LC001 Vehicle Type and
LC005 CD changer.
If the fault is still present, contact the Techline.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the faults from the 4R radio navigation computer memory using command RZ001
Fault memory.
NAV4R_V24_DF021P
Page 21 of 86

MULTIMEDIA
Fault finding - Interpretation of faults
86C
86C-20
NAV 4R
Program no.: 0000
Vdiag No.: 24
DF024
PRESENT
OR
STOREDNO INSTRUMENT PANEL MULTIPLEX SIGNAL
1.DEF : No communication with the instrument panel
NOTESOrder of priority in the event of more than one fault:
If faults DF024 No instrument panel multiplex signal and DF026 No fold-out unit
multiplex signal are present, run command VP005 Computer configuration to
reconfigure the system (see Configuration and programming).
Conditions for applying fault finding procedures to stored faults:
Apply this fault finding procedure if the fault reappears as present or stored after it has
been cleared and the ignition has been switched off and on again.
Special note:
Apply this fault procedure only for vehicles equipped with an instrument panel dot
matrix display (Top of the range Mégane II phase 2).
Use the Wiring Diagrams Technical Note for the Mégane II.
Look for any damage to the wiring harness, check the condition and connection of the connectors on
components 261 and 247.
Manipulate the wiring harness in order to produce a change in the fault status (present → stored).
If the connector is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
Using the universal bornier, check the insulation, continuity and the absence of interference resistance on
the following connections:
●connection code 107W,
●connection code 107X,
between components 261 and 247.
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 fault is still present, run fault finding on the instrument panel (see 83A, Instrument panel) and the multiplex
network (see 88B, Multiplexing).
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the faults from the 4R radio navigation computer memory using command RZ001
Fault memory.
NAV4R_V24_DF024
Page 22 of 86

MULTIMEDIA
Fault finding - Interpretation of faults
86C
86C-21
NAV 4R
Program no.: 0000
Vdiag No.: 24
DF026
PRESENT
OR
STOREDNO FOLD-OUT UNIT MULTIPLEX SIGNAL
1.DEF : No communication with the display fold-out unit
NOTESOrder of priority in the event of more than one fault:
If faults DF024 No instrument panel multiplex signal and DF026 No fold-out unit
multiplex signal are present, run command VP005 Computer configuration to
reconfigure the system (see Configuration and programming).
Conditions for applying fault finding procedures to stored faults:
Apply this fault finding procedure if the fault reappears as present or stored after it has
been cleared and the ignition has been switched off and on again.
Special note:
Apply this fault procedure only for vehicles equipped with a fold-out unit (Top of the
range Mégane II phase 2).
Use the Wiring Diagrams Technical Note for the Mégane II.
Look for any damage to the wiring harness, check the condition and connection of the connectors on
components 261 and 1303.
Manipulate the wiring harness in order to produce a change in the fault status (present → stored).
If the connector is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
Using the universal bornier, check the insulation, continuity and the absence of interference resistance on
the following connections:
●connection code 34GA,
●connection code 34DZ,
●connection code 34GG,
●connection code BCP3,
between components 261 and 1303.
If the connection is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check for + 12 V on connection BCP3 of the connector of component 1303.
Also check for earth on connection MAN of the connector of component 1303.
If the connection is 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 fault is still present, run fault finding on the multiplex network (see 88B, Multiplexing).
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the faults from the 4R radio navigation computer memory using command RZ001
Fault memory.
NAV4R_V24_DF026
Page 23 of 86

MULTIMEDIA
Fault finding - Interpretation of faults
86C
86C-22
NAV 4R
Program no.: 0000
Vdiag No.: 24
DF027
PRESENT
OR
STOREDNO AUDIO CD CHANGER SIGNALS
1.DEF : No communication with the CD changer
NOTESOrder of priority in the event of more than one fault:
Deal with fault DF001 Computer first, if present or stored.
Conditions for applying fault finding procedures to stored faults:
Apply this fault finding procedure if the fault reappears as present or stored after it has
been cleared and the ignition has been switched off and on again.
Special note:
If the vehicle does not have a CD changer, check the 4R radio navigation computer
configuration (see Configuration and programming).
Apply the following fault finding procedure to vehicles equipped with a CD changer.
Use the Wiring Diagram Technical Note for the vehicle concerned.
Look for any damage to the wiring harness, check the condition and connection of the connectors on
components 261 and 1272.
Manipulate the wiring harness in order to produce a change in the fault status (present → stored).
If the connector is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
Using the universal bornier, check the insulation, continuity and the absence of interference resistance on
the following connections:
●connection code 34AZ,
●connection code 34BA,
●connection code 34BL,
●connection code 34BC,
●connection code 34BD,
●connection code 34BG,
●connection code 34BH,
●connection code 34BK (only for Scénic),
between components 261 and 1272.
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 fault is still present, contact the Techline.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the faults from the 4R radio navigation computer memory using command RZ001
Fault memory.
NAV4R_V24_DF027
Page 24 of 86

MULTIMEDIA
Fault finding - Interpretation of faults
86C
86C-23
NAV 4R
Program no.: 0000
Vdiag No.: 24
DF030
PRESENT
OR
STOREDGPS AERIAL CIRCUIT
CO : Open circuit
NOTESConditions for applying fault finding procedures to stored faults:
Apply this fault finding procedure if the fault reappears as present or stored after it has
been cleared and the ignition has been switched off and on again.
Use the Wiring Diagram Technical Note for the vehicle concerned.
Check the condition and connection of the GPS coaxial connector on components 261 (Trafic: 662) and 886
(and 1551 for Laguna and Mégane cabriolet) (bent pins, bad contacts, etc.).
Carefully manipulate the wiring harness in order to produce a change in fault status (present → stored).
If the connector is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
Using the universal bornier, check the insulation, continuity and the absence of interference resistance on
the following connections:
Mégane cabriolet:
●connection code TB13,
●connection code 34AN,
between components 261 and 886;
●connection code 46CB,
●connection code TB15,
between components 886 and 1551.
Mégane hatch and Scénic:
●connection code TB13,
●connection code 34AN,
●connection code 46CB,
●connection code TB15,
between components 261 and 886.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the faults from the 4R radio navigation computer memory using command RZ001
Fault memory.
Check the number of satellites received from outside, with the system switched on for
10 minutes, followed by a new check with the diagnostic tool.
NAV4R_V24_DF030
Page 28 of 86
MULTIMEDIA
Fault finding - Interpretation of faults
86C
86C-27
NAV 4R
Program no.: 0000
Vdiag No.: 24
DF034
PRESENT
CD READER
1.DEF : CD unreadable
NOTESSpecial note:
The system enables:
–CD-ROM maps to be displayed,
–the user to listen to commercial audio CDs, CDs burned independently, CDs
containing MP3 files (optional). The CDs are read by the 4R unit's CD player or by
the optional 6-CD changer.
Check that the CD is not scratched.
For a CD-ROM card, change the CD.
For all other types of CD, check that the CD format is compatible with the system.
If the fault is still present, contact the Techline.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the faults from the 4R radio navigation computer memory using command RZ001
Fault memory.
NAV4R_V24_DF034P