APRILIA SHIVER 900, Service Station Manual

Page: 193 / 444

BEFORE CARRYING OUT ANY TROUBLESHOOTING, CAREFULLY READ THE GENERAL TROU-
BLESHOOTING CONCEPTS FOR ELECTRICAL DEVICES AT THE BEGINNING OF THE CHECK
AND CONTROL SECTION IN THE ELECTRICAL SYSTEM CHAPTER.
DIAGNOSTIC TOOL: ELECTRICAL ERRORS
U1125 Frame counter "Sensor Box" CAN line diagnosis
Electrical diagnosis:
•
Intermittent signal or communication error
Error cause:
•
Probable bad contact in the CAN line.
This error is not indicated even in the ATT status.
Troubleshooting:
•
Perform the check procedure for the VEHICLE connector at PIN 66 and PIN 80 and of the
engine-vehicle wiring harness connector at PIN B2 and B3; if NOT OK, restore; if ok, check
the general operation of the Marelli control unit; in case of anomalies, replace it.
NOTE
THIS ERROR DISABLES THE TRACTION CONTROL.
DIAGNOSTIC TOOL: LOGIC ERRORS
U1121 Diagnosis of "ABS control unit" CAN line or CLF frame counter
Functional diagnosis:
•
Signal absent
Error cause:
•
If there is no signal, no signal is received from the ABS control unit.
This error is indicated by lighting up in a fixed manner the MI warning light.
Troubleshooting:
•
Missing signal - Perform the check procedure for PIN 5 and PIN 6 of the ABS control unit
connector, for PIN 66 and PIN 80 of the Marelli control unit vehicle connector: if NOT OK,
restore; if OK with key OFF, disconnect the ABS control unit connector; if NOT OK replace
the wiring harness, if OK check the correct power supply to PIN 18 (12V) and the grounding
of ABS control unit PIN 1; if NOT OK, restore the wiring harness, if OK, replace the ABS
control unit.
NOTE
THE PRESENCE OF THIS ERROR DETERMINE THE DEACTIVATION OF THE TRACTION CON-
TROL AND THE CRUISE CONTROL.
P1800 Rear wheel radius learning diagnosis
Functional diagnosis:
•
CAN error while learning / Signal not plausible.
Error cause:
SHIVER 900
Electrical system
ELE SYS - 193