APRILIA RSV4 1100 Factory Service Station Manual page 171

RSV4 1100 Factory
with the key ON and the sensor connector disconnected, check if there is battery voltage at
PIN 4: if NOT OK, check the continuity of the Red//Brown cable between the probe connector
and the injection relay (no. 33 in the electrical circuit diagram, position under the saddle,
close to the battery positive; however, CHECK the relay identification with the cable colours);
if there are also errors regarding the coils, lower and upper injectors and secondary air,
check the relay and its energy and power line; if there is voltage at PIN 4, check ground
insulation of the green cable (PIN 3): if NOT OK, restore the wiring harness; if OK, check
the continuity of the Green cable (between PIN 3 of the sensor connector and ENGINE PIN
32) and restore the wiring harness.
WARNING
The control unit does not detect the following malfunctions of the lambda probe circuit relative
to the signal: interrupted circuit, short circuit to ground or malfunction of the sensor (for ex-
ample, voltage not variable). If the indication is abnormal, perform the troubleshooting indicated
below.
Troubleshooting
•
Check the continuity of the circuit from the probe connector (PIN 1 and PIN 2) towards the
probe: replace the lambda probe if there is no continuity; if there is continuity, check the
sensor connector and the Marelli control unit connector: if NOT OK, restore; if OK, check
the continuity between the ENGINE connector PIN 10 and PIN 22 and restore the wiring
harness.
DIAGNOSTIC TOOL: LOGIC ERRORS
P0134 Rear bank lambda probe
Functional diagnosis:
•
no switching from high / no switching from low
Error cause:
•
If no switching from high: is shown when the ratio control is in closed loop and when the
secondary air valve is not operating. The error is validated if the engine is in CUTOFF status
and the probe signal is close to 1V, or if the engine is in another operating condition that
requires the injection but the switching from the"HIGH RATIO" to "LOW RATIO" is missing
for a certain"adjusted" number of dead points (PMS or TDC).
•
If no switching from low: is shown when the ratio control is in closed loop and when the
secondary air valve is not operating. The error is validated if during the ratio control stage,
the switching from "HIGH RATIO" to "LOW RATIO" is missing for a certain"adjusted" number
of upper dead points (PMS or TDC).
The instrument panel indicates this error by lighting up in a fixed manner the MI warning light.
Troubleshooting:
Electrical system
ELE SYS - 171