88B-12
V1
MR-453-X79-88B000$050.mif
88B
ALP 1 No dialogue with computers
NOTES
Vehicle computer power supply for fault finding:
Engine stopped, ignition on.
Connect the diagnostic tool and perform the required operations.
Try the diagnostic tool on another vehicle.
Check that the tool has been updated with the latest version.
Check:
–the connection between the diagnostic tool and the diagnostic socket (component 225) (connection and cable
in good condition),
–the supplies of the computers,
–the engine and passenger compartment fuses.
Check for the supply and earth on the diagnostic socket (component 225) through the following connections: BP56
(+12 V), MAN and NC (earths). If the checks are correct then move on to the next step, depending on the type of
sensor used:
1. Renault fault finding sensor (with wire connection only):
Check that the CLIP sensor is supplied via the computer's USB port and the diagnostic socket by checking that the
red diodes illuminate. If this is not the case, try again with another cable or sensor or even another clip sensor in
order to determine the faulty component.
Check that the CLIP sensor is communicating correctly with the vehicle computers; this can be confirmed by
the illumination of the two green diodes on the sensor. If it is not, check that the test conditions have been met
(+ after ignition feed, vehicle selection etc.) otherwise apply the electrical checks below.
Green LEDs Red LEDs
multiplex line
Vehicle supply through
diagnostic socket
ISO
Sensor supply through
USB port
2. Alliance fault finding sensor (with wireless connection possible):
Deal with the fault finding for each warning light in the following order of priority: from warning light 1 to warning light 3.
MULTIPLEXING
Fault finding – Fault Finding Chart
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