TYRE PRESSURE MONITOR
Fault finding - Introduction
35B
35B-5
UCH
Program no.: 350 and higher
Vdiag No: 48-4C-4D-4F-50
4. FAULT FINDING PROCEDURE (continued)
Check the battery charge and the
condition of the fuses
Print the system fault finding log
(available on CLIP and in the
Workshop Repair Manual or
Technical Note)
Connect CLIP
Dialogue
with UCH?no
yes
Read the faults
Faults
presentno
yes
Deal with present faults
Deal with stored faults
The cause is
still presentno
Fault
solved
yes
Perform a
prediagnostic; see
system operation.
See ALP 1
Conformity check
The cause is
still presentno
Fault
solved
Use fault finding charts (ALPs)
The cause is
still presentno
Fault
solved
Contact Techline with the
completed fault finding log
Edition 4
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
