Affected terminals
Terminal III/14
Diagnosis/troubleshooting
85 Electric Change-Over Valve - Below Limit
P0414
85 Electric change-over valve - below limit
Diagnosis conditions
- Engine running
- Battery voltage greater than 7 V
Possible fault cause
- Short circuit to ground
NOTE: The triggering wire for the electric change-over valve is monitored.
Affected terminals
Terminal III/14
Diagnosis/troubleshooting
Electric Change-Over Valve - Above Limit
P0414
Electric Change-over Valve - Above Limit
Function
To improve emissions and to heat the three-way catalytic converter (TWC) faster, secondary air is blown behind the exhaust valves after the engine
is started when cold. For this, an electric pump is used. An electric change-over valve is required to trigger the air change-over valve.
Diagnosis conditions
- Engine running
- Battery voltage greater than 7 V