SAS valve actuator
Function
Quickly warms up the catalytic converter and
keeps the combustion rich in some critical condi-
tions
Operation / operating principle
The valve coil is excited to open the air passage
of the filter box to the exhaust manifold
Level in wiring diagram:
Secondary air valve and lambda probe
Location:
•
on the vehicle: under throttle bodies, in
the V between the two front and rear
cylinders banks
•
connector: on the valve
Electrical characteristics:
Resistance at ambient temperature: 21 +3/- 1 Ω
Pin out:
1. Power supply V batt
2. Ground connection
DIAGNOSIS INSTRUMENT: PARAMETERS
Secondary air valve duty cycle
•
Example value with key ON: 0 %
•
Example value with engine on: %
Used only at 0 or 100%
CAUTION
BEFORE CARRYING OUT ANY TROUBLESHOOTING,
CAREFULLY READ THE GENERAL TROUBLESHOOTING
CONCEPTS FOR ELECTRICAL DEVICES AT THE BEGIN-
NING OF THE CHECK AND CONTROL SECTION IN THE
ELECTRICAL SYSTEM CHAPTER.
DIAGNOSIS INSTRUMENT: LOGIC ERRORS
Secondary air valve control P0446
•
short circuit to positive/ short circuit to negative / open circuit
Error cause
•
If shorted to positive: excessive voltage has been detected at PIN 43. If shorted to negative/
open circuit: no voltage has been detected. The instrument panel does not indicate the
presence of this error even in the ATT status.
Troubleshooting
RSV4 R Electrical system
ELE SYS - 207
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