MULTIMEDIA
Fault finding - Interpretation of faults
86C
86C-26
NAV 4R
Program no.: 0000
Vdiag No.: 24
DF032
PRESENT
OR
STOREDDISPLAY SUPPLY
CO.1 : Short circuit or open circuit to + 12 V
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.
Special note:
Run command AC021 Display test. Three colours are displayed on the screen: Red,
green and blue, and a black mosaic on a white background. If this is not displayed,
apply the fault finding procedure detailed below.
Use the Wiring Diagram Technical Note for the vehicle concerned.
Check the condition and connection of the video connector on components 261 (Trafic: 662) and 1127 (bent
pins, bad contacts, etc.).
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 46M,
●connection code 46N,
●connection code 46BG,
●connection code 46BH,
●connection code 46BK,
between components 261 (Trafic: 662) and 1127.
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.
Check for + 12 V on connections 46M and 46N of the connector of component 1127.
Also check for earth on connections 46BG, 46BH and 46BK of the connector of component 1127.
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 REPAIRCheck that the screen is operating correctly using command AC021 Display test.
Deal 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_DF032
MULTIMEDIA
Fault finding - Dealing with commands
86C
86C-57
NAV 4R
Program no.: 0000
Vdiag No.: 24
Fault finding - Dealing with commands
CLEARING
RZ001 Fault memory:
This command is used to clear faults stored in the navigation computer.
ACTIVATIONS
AUDIO tab
AC004 Speaker test:
This command is used to perform a listening test on the speakers.
DISPLAY tab
AC021 Display test:
This command is used to check that the video display is operating correctly. Three colours are displayed on
the screen: Red, green and blue, and a black mosaic on a white background.
USER SELECTION tab
AC022 CD ejection:
This command is used to eject the CD from the CD reader, and not from the CD changer.
