They are not related the third one is secondary air system the first two may be the O2 sensor here is test procedure for secondary air.
CIRCUIT/SYSTEM� TESTING
1. With� the� ignition� ON� and� the� engine� OFF, � observe� the� AIR� Pressure� Sensor� parameter� with� a� scan� tool� while� manipulating� all� related� wiring� and� connectors.
? If� manipulation� does� affect� the� AIR� Pressure� Sensor� parameter� then� repair� the� harness� or� connector.
2. With� the� ignition� ON, � the� engine� OFF, � and� the� solenoid� valve� disconnected, � measure� for� 5� volts� between� the� 5 volt� reference� circuit� and� ground.
? If� more� than� 5� volts� then� test� the� 5 volt� reference� circuit� for� a� short� to� voltage� or� a� faulty� control� module.
? If� less� than� 5� volts� then� test� the� 5 volt� reference� circuit� for� high� resistance, � a� short� to� ground, � or� a� faulty� control� module.
3. With� the� ignition� ON, � the� engine� OFF, � and� the� solenoid� valve� disconnected, � measure� for� 0� volts� between� the� low� reference� circuit� and� ground.
? If� more� than� 0� volts� then� test� the� low� reference� circuit� for� a� short� to� voltage� or� a� faulty� control� module.
4. With� the� ignition� ON, � the� engine� OFF, � and� the� solenoid� valve� disconnected, � inspect� for� an� AIR� Pressure� Sensor� parameter� reading� on� a� scan� tool� of� 0� volts.
? If� more� than� 0� volts� then� test� the� signal� circuit� for� a� short� to� voltage� or� a� faulty� control� module.
5. With� the� ignition� ON, � the� engine� OFF, � the� solenoid� valve� disconnected, � and� a� 3 amp� fused� jumper� wire� connected� between� the� signal� and� 5 volt� reference� circuits, � inspect� for� an� AIR� Pressure� Sensor� parameter
reading� on� a� scan� tool� of� 5� volts.
? If� less� than� 5� volts� then� test� the� signal� circuit� for� high� resistance, � a� short� to� ground, � or� a� faulty� control� module.
6. With� the� ignition� ON, � the� engine� OFF, � the� solenoid� valve� disconnected, � a� 300� ohm� fixed� resistor an� appropriate� length� of� secondary� ignition� wire� may� be� adequate installed� between� the� 5 volt� reference� circuit� and
the� low� reference� circuit, � and� a� 3 amp� fused� jumper� connected� from� the� signal� circuit� to� the� 5 volt� reference� circuit� at� the� fixed� resistor, � observe� an� AIR� pressure� sensor� parameter� reading� on� a� scan� tool� of� 5� volts.
? If� less� than� 5� volts� then� test� the� 5 volt� reference� circuit� and� the� signal� circuit� for� high� resistance� or� a� faulty� control� module.
7. With� the� ignition� ON, � the� engine� OFF, � the� solenoid� valve� disconnected, � a� 300� ohm� fixed� resistor an� appropriate� length� of� secondary� ignition� wire� may� be� adequate installed� between� the� 5 volt� reference� circuit� and
the� low� reference� circuit, � and� a� 3 amp� fused� jumper� connected� from� the� signal� circuit� to� the� low� reference� circuit� at� the� fixed� resistor, � inspect� for� a� pressure� sensor� parameter� reading� on� a� scan� tool� of� 0� volts.
? If� more� than� 0� volts� then� test� the� low� reference� circuit� for� high� resistance� or� a� faulty� control� module.
8. If� all� circuits� and� the� control� module� test� OK� then� replace� the� solenoid� valve.
You may have a short in voltage to O2 sensor. Also check fuse emission 1
Sunday, February 17th, 2013 AT 7:03 PM
