APRILIA SHIVER 900, Service Station Manual

Page: 145 / 444

•
Check the pneumatic system between the pressure sensor and the socket to read pressure
on the throttle body; check that the intake manifold is in good conditions and the pressure
reading hole is clean: there is a very evident defect in the intake and pressure reading sys-
tem.
P1603 Estimation error for rear cylinder intake manifold pressure
Functional diagnosis:
•
pressure too high/pressure too low.
Error cause:
•
A substantial difference between the estimated pressure and the measured pressure has
been detected (for example, the pipe between sensor and throttle body is fully detached/
clogged or squashed).
This error is indicated by flashing the general warning light and by lighting up in a fixed manner the MI
warning light.
Troubleshooting:
•
Check the pneumatic system between the pressure sensor and the socket to read pressure
on the throttle body; check that the intake manifold is in good conditions and the pressure
reading hole is clean: there is a very evident defect in the intake and pressure reading sys-
tem.
P1604 Front manifold pressure too low error
Functional diagnosis:
•
signal not plausible.
Error cause:
•
Small difference detected between the estimated pressure and the measured pressure: the
measured pressure is below the estimated one (for example, smeared throttle body).
This error is indicated by flashing the general warning light and by lighting up in a fixed manner the MI
warning light.
Troubleshooting:
•
Check the pneumatic system between the pressure sensor and the socket to read pressure
on the throttle body; check that the intake manifold is in good conditions and the pressure
reading hole is clean.
P1605 Rear manifold pressure too low error
Functional diagnosis:
•
signal not plausible.
Error cause:
SHIVER 900
Electrical system
ELE SYS - 145