How to find the secondary air pump relay?
How to find the secondary air pump relay?
Command the air pump on with a scan tool. If it does not turn on, check the 30 amp AIR fuse and the 15 amp IGN 1-U/H fuse in the underhood accessory wiring junction block. 2. If OK, check for power on the Red wire and ground on the Black wire at the air pump. If no power, check the operation of the air pump relay. 3.
How does the secondary air injection pump work?
The secondary air injection (AIR) system aids in the reduction of hydrocarbon emissions during a cold start. The system forces fresh filtered air into the exhaust stream in order to accelerate the catalyst operation. The secondary AIR injection pump provides filtered air on demand to the AIR solenoid check valve assembly.
When do you hear the secondary air pump start?
You should be able to hear the secondary air pump start after 5 to 10 seconds – it’s a vacuum cleaner-like sound that runs under the hood of the vehicle. As soon as the AIR pump kicks in, the front O2 sensor (s) voltage should be less than .125V (or 125 milivolts).
Where is the fuse box located on a GMC Envoy?
Fuse box location Rear Underseat Fuse Block It is located under the rear seat on the driver’s side of the vehicle (tilt the seat up, remove the fuse box cover). Engine compartment fuse box
Where are the relays on an air injection pump?
There are 2 relays. The one they gave you is on the pump. The other is in the fuse block. You need a scan tool to check all this. You need to command the system on to verify the pump and solenoid are working. The secondary air injection (AIR) system aids in the reduction of hydrocarbon emissions during a cold start.
The secondary air injection (AIR) system aids in the reduction of hydrocarbon emissions during a cold start. The system forces fresh filtered air into the exhaust stream in order to accelerate the catalyst operation. The secondary AIR injection pump provides filtered air on demand to the AIR solenoid check valve assembly.
Fuse box location Rear Underseat Fuse Block It is located under the rear seat on the driver’s side of the vehicle (tilt the seat up, remove the fuse box cover). Engine compartment fuse box
What are the symptoms of an air injection pump failure?
Below you’ll find the five most common symptoms of secondary air injection pump failure. If you notice at least two of the symptoms occurring, there’s a good chance you’re dealing with a faulty secondary air injection pump and you need to get it serviced right away.
