88B-24
AFTER REPAIRRun the multiplex network test again using the diagnostic tool.
Clear the stored faults on all the computers connected to the network.
Deal with any other faults.
V3 MR-413-X44-88B000$070.mif
MULTIPLEXING
Fault finding – Interpretation of faults88B
FAULTY COMPUTER (continued 1)
Multimedia multiplex network
NOTESSwitch off the vehicle ignition.
Measure the resistance of component 225 between the following Multimedia multiplex line connections:
–connection code 107X
–connection code 107W
What is the value of the resistance?
0 ΩΩ Ω ΩThe two lines are in short circuit (see Introduction - Repair advice).
60 ΩΩ Ω Ω
± 10 ΩΩ Ω Ω
For radio R1-08 and radio R2-08:
Check for earth on connection MA0, and for +12 V supply on connection BCP4 to the
radio 261.
Check for earth on connection NAM, and for +12 V supply on connection BCP4 and
BPT to the display 653.
For the Multimedia connection (C-box):
Check for earth on connection NAM, and for +12 V supply on connection BCP4 to the
Multimedia connection computer (C-box) 1959.
BETWEEN 70 ΩΩ Ω Ω
AND 110 ΩΩ Ω ΩFor each of Multimedia multiplex line connections 107X and 107W, check that there
is no interference resistance and then check that there is no short circuit to earth or to
the + battery feed.
120 ΩΩ Ω Ω
± 10 ΩΩ Ω Ω
Open circuit on one or both lines
For radio R1-08 and radio R2-08
Disconnect component 261 and check the multimedia multiplex connections 107X
and 107W between components 225 and 261.
For the Multimedia connection (C-box):
Disconnect component 1959 and check the multimedia multiplex connections
107X and 107W between components 225 and 1959.
Is the multiplex connection correct?
88B-25
AFTER REPAIRRun the multiplex network test again using the diagnostic tool.
Clear the stored faults on all the computers connected to the network.
Deal with any other faults.
V3 MR-413-X44-88B000$070.mif
MULTIPLEXING
Fault finding – Interpretation of faults88B
FAULTY COMPUTER (continued 2)
Multimedia multiplex network
YESFor radio R1-08 and radio R2-08
Check that the resistance is approximately 120 ΩΩ Ω Ω
between the two connections 107X
and 107W on component 261:
–If the resistance is not approximately 120 Ω, contact Techline.
–If the resistance is 120 ΩΩ Ω Ω
, check the continuity and the absence of interference
resistance of multimedia multiplex connection 107X and 107W between
components 225 and component 653.
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 that the resistance is approximately 120 ΩΩ Ω Ω
between the two connections 107X
and 107W on component 653:
–If the resistance is not approximately 120 Ω, contact Techline.
For the Multimedia connection (C-box)
Check that the resistance is approximately 120 ΩΩ Ω Ω
between the two connections 107X
and 107W on component 1959:
–If the resistance is not approximately 120 Ω, contact Techline.
–If the resistance is 120 ΩΩ Ω Ω
, check the continuity and the absence of interference
resistance of multimedia multiplex connection 107X and 107W between
components 225 and component 653
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 that the resistance is approximately 120 ΩΩ Ω Ω
between the two connections 107X
and 107W on component 653:
–If the resistance is not approximately 120 Ω, contact Techline.
NO Repair the multimedia multiplex connections 107X and 107W between
components 225 and 653.
88B-27
AFTER REPAIRRun the multiplex network test again using the diagnostic tool.
Clear the stored faults on all the computers connected to the network.
Deal with any other faults.
V3 MR-413-X44-88B000$070.mif
MULTIPLEXING
Fault finding – Interpretation of faults88B
UNRECOGNISED COMPUTERS ON THE NETWORK
NOTES–Check computer compatibility with the vehicle.
E.g.: Certain computers such as Radio R1-08 might not be recognised because a
type A3 display is fitted (in place of a type A2 display).
Check that the CLIP diagnostic tool update is recent enough to be able to deal with faults on the vehicle.
–Switch to computer fault finding mode.
Attempt to establish dialogue with computers.
If there is no communication from the computers to the diagnostic tool: see ALP 1
No dialogue with the computers or computers not communicating with the diagnostic tool.
Check the connections to the computers and that there are no open circuits.
Repair if necessary.
If there is communication with computers:
Make sure that the computer identification information is correct and matches the vehicle in fault finding.
–Check that the following computer information is correct:
–Vdiag:
–Program No.: (injection computer)
If no faults or open or short circuits have been detected after these tests, contact Techline.
