Page 31 of 37
TYRE PRESSURE MONITOR
Fault finding - Fault Finding Chart
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50TYRE PRESSURE MONITOR
Fault finding - Fault Finding Chart
ALP 1 No dialogue with the computer
NOTESNone
Try the diagnostic tool on another vehicle.
Make sure the tool update version is more recent than CD-ROM No. 32.
Check:
–the connection between the diagnostic tool and socket (connection and cable in good condition).
–the computer power supply
–the engine and passenger compartment fuses.
Make sure that the CLIP sensor is fed by tracks 16 (+ 12 V), 4 and 5 (earth) of the diagnostic socket, which
can be seen by the two red warning lights on the sensor lighting up.
Make sure that the CLIP sensor is connected to the computer's USB port.
Make sure that the CLIP sensor is communicating properly with the vehicle's computers; this can be seen by
the two green diodes on the sensor lighting up.
Check the following tracks on the diagnostic socket:
track 1 + After ignition feed
track 16 + battery feed
tracks 4 and 5 Earth
Repair if necessary.
Check the continuity, insulation and absence of interference resistance on lines:
multiplex line H (diagnostic socket track 6)
multiplex line L (diagnostic socket track 14)
With a multimeter, make sure that the voltages at the diagnostic socket terminals are:
–2.5 V between CAN H (track 6) and the earth (tracks 4 and 5)
–2.5 V between CAN L (track 14) and the earth (tracks 4 and 5)
If dialogue with the UCH still has not been established after all the checks, contact your Techline.
AFTER REPAIRCheck that no faults are still present.
Check that the system is operating correctly.
SSPP_V48_ALP01 /SSPP_V4C_ALP01/SSPP_V4D_ALP01/SSPP_V4F_ALP01/SSPP_V50_ALP01
Edition 4
35B-30
Page 34 of 37
TYRE PRESSURE MONITOR
Fault finding - Fault Finding Chart
35B
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50
ALP 4"Tyre sensor inoperative" message lights up (wheel warning light
disappears)
NOTESCheck that all the faulty tyres are fitted with tyre pressure monitor valves.
Has one of the wheels been replaced with
the spare?YES
NO
Program the four valve codes with command
SC002 Program the four valve codes.
Did the programming procedure go
properly?
NO YES
End of fault finding
Replace the faulty valve.
Do the necessary work
on the wheel with a tyre
pressure monitor valve,
then refit it on the vehicle
AFTER REPAIRCarry out a complete check with the diagnostic tool.
35B-33
SSPP_V48_ALP04 /SSPP_V4C_ALP04/SSPP_V4D_ALP04/SSPP_V4F_ALP04/SSPP_V50_ALP04
Edition 4
Page 35 of 37
TYRE PRESSURE MONITOR
Fault finding - Fault Finding Chart
35B
ALP 5"Tyre sensor inoperative" message lights up (four wheel symbol
warning lights disappear)
NOTESCheck that all the faulty tyres are fitted with tyre pressure monitor valves.
Are the wheels fitted with tyre pressure
monitor valves?NO
YES
Check the configuration of the Tyre Pressure
Monitor in the UCH (LC017 Tyre Pressure
Monitor Function).
Is the UCH set to "With" for the Tyre Pressure
Monitor function?NO
YES
NO
Have the valve codes been programmed?
YES
Make sure the ABS is transmitting the vehicle
speed (PR008 Vehicle speed).
YES
Is there an ABS fault?
UCH fault, contact the Techline.
Program the four valve codes with command
SC002 Program the four valve codes.
Is the vehicle equipped with the Tyre
Pressure Monitor option?
YES NO
Install the Tyre Pressure
Monitor valves.
Deconfigure the Tyre Pressure Monitor in the
instrument panel.
Configure the UCH with the Tyre Pressure
Monitor function by using command CF023 Tyre
Pressure Monitor function under SC008 UCH
type.
Run full fault finding on the ABS.
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50
AFTER REPAIRCarry out a complete check with the diagnostic tool.
35B-34
SSPP_V48_ALP05 /SSPP_V4C_ALP05/SSPP_V4D_ALP05/SSPP_V4F_ALP05/SSPP_V50_ALP05
Edition 4
