Where are the relays on an air injection pump?
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.
How does a secondary air injection system work?
To reduce loads on the electrical system, the PCM feeds power to the SAI pump via a relay (relay “A” in this case) that delivers battery voltage through a fuse or fusible link to the SAI pump motor. The image below shows a simplified schematic drawing of a typical secondary air injection system.
When to replace a Sai air pump relay?
Replace the relay with an OEM replacement if any tested value does not agree with the values stated in the manual. If relay “A” checks out, prepare to perform resistance, continuity, and ground integrity checks on all associated wiring, but be sure to disconnect the SAI wiring from the PCM to prevent damaging the controller during resistance tests.
Why do I have a code p0410 on my secondary air pump?
If you have a code P0410 that relates to secondary air pump, there are a few possibilities that could trigger this code. 1. It could be a bad secondary air pump. We have a video that will show you how to test a secondary air pump 2. It could be relay that does not activate the secondary air pump 3. It could be bad fuse 4. Bad connection
What is the purpose of secondary air injection?
The primary purpose of a secondary air injection system is to consume the excess fuel that is injected during cold-start enrichment before it can reach the catalytic converter. This has the effect of improving tailpipe emissions.
Do you need a secondary air injection system?
The air injection smog pump pushes air into the exhaust system right after the exhaust manifold, to help intercept and burn those unburned fuels. The system is critical to help cars achieve government emissions standards. So, the law says you need a secondary air injection system .
Were is the secondary air pump relay located on car?
The secondary air injection pump relay (J299) is inside the engine compartment , left side, behind air cleaner housing, under a black plastic protective cover you can lift up to reveal it. It’s near the brake fluid reservoir beside the odd black plastic cover for the wiring harness beside the shock absorber tower.
What does a secondary air injection system do?
Secondary air injection (commonly known as air injection) is a vehicle emissions control strategy introduced in 1966, wherein fresh air is injected into the exhaust stream to allow for a fuller secondary combustion of exhaust gases. 1 Development. Oct 12 2019
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.
Where is the air pump on my car?
The air pump is located On left front frame rail, forward of fenderwell. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
How does the air pump control module work?
In all 3 phases, testing is accomplished by comparing the measured pressure against the expected pressure. The control module can detect faults in the AIR pump, AIR solenoid, pressure sensor, and the exhaust check valve. The pressure sensor can also detect leaks and restrictions in the secondary AIR system plumbing.
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.
How to find that darn air pump relay?
Tests/Procedures: 1. 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 to fix a secondary air injection pump?
Secondary Air Injection Pump Fix Venture Silhouette Montana – YouTube P0410 P0418 How to find that darn relay! Secondary Air Injection Pump Fix Venture Silhouette Montana
What is the code for secondary air injection?
I’ve never seen a code for a secondary air injection system before…. 2008 toyota tundra 5.7, 104,000 miles. I got a p0415 code. I replaced both pumps and the switching valves. Also replaced the battery and fuel cap. All fuses, including the main fusable link, and all check good with 12+ volts to each side.
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 is the fuse box on a GMC Envoy?
GMC Envoy (2005) – fuse box diagram Posted on 12 December 201624 October 2018by admin GMC Envoy (2005) – fuse box diagram Year of production: 2005 Engine Compartment Fuse Block The fuse block is located under the hood in the engine compartment on the driver’s side of the vehicle. L6 Engine GMC Envoy mk2 – fuse box – engine compartment (L6 engine)
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.
What are the symptoms of a bad air injection pump?
One of the early symptoms of a bad secondary air injection pump is the Check Engine warning light turning on. The engine control unit can automatically detect when the secondary air injection pump has a problem.
