PIAGGIO PORTER 1.3 16V 2008, Service Manual

Page: 472 / 892

13 . 15A EFI fuse No. 1
14 . 15A EFI fuse No. 2
15 . EFI ECU control unit
Circuit description
Refer to the diagnostic failure code P0130 (Oxygen sensor circuit malfunction (Bank 1 sensor 1)
Failure code Diagnostic failure code detection
Conditions
Affected area
P0133 The response time so that the oxygen sensor
output voltage changes from rich to lean, or
from lean to rich, exceeds a certain period
while the engine runs at idle speed after it has
been warmed up (detection logic with 2 inter-
ventions)
- Air intake system - Fuel pressure
- Injector injection
- Open circuit or short circuit in the heated oxy-
gen sensor circuit
- Oxygen sensor heated
- Engine electronic control unit
SENSOR 1 REFERS TO THE SENSOR CLOSURE ON THE ENGINE BLOCK.
READ THE FROZEN IMAGE DATA USING THE DIAGNOSTIC TESTER DS-21 OR OBD II GENERAL
SCANNING DEVICE. AS FROZEN IMAGE DATA RECORD THE ENGINE CONDITIONS AT THE
MOMENT THE DEFECT IS DETECTED, THESE DATA ARE USEFUL TO DETERMINE DURING THE
TROUBLESHOOTING PHASE, IF AT THE MOMENT OF FAILURE CHECKING, THE VEHICLE WAS
WORKING OR AT STANDSTILL, IF THE ENGINE WAS HOT OR NOT, IF THE AIR/FUEL RATIO
WAS LEAN OR RICH ETC.
CHECKING PROCEDURE
1. If other codes are generated besides the code
P0130, proceed with the relevant diagnostic failure
code diagram.
2.Checking the cable harness between the
oxygen sensor and the electronic control unit.
•
With the ignition switch set to OFF, set
the special tool (sub-wiring harness).
Disconnect the special tool connectors
on the electronic control unit side.
•
Disconnect the oxygen sensor connec-
tor.
•
Refer to sect. ''Checking wires and
connectors'', check the cable harness
and the connector for interrupted or
short-circuited wires.
Check if there are interrupted or short-circuited ca-
bles between the X28 connector of the oxygen
sensor on the cable harness side and the terminal
Iniection System
PORTER 1.3 16V
IS - 472