Secondary air system: Function: Notes
- In the cold start phase, the ECM -4- activates the secondary air pump -2- via the relay for secondary air injection -3-. Air reaches the combination valves for Secondary Air Injection (AIR) -5- and -9-.
- The Secondary Air Injection (AIR) valve -6- is activated in parallel, which allows the vacuum to reach the combination valves for Secondary Air Injection (AIR) -5- and -9-. The appropriate combination valve for Secondary Air Injection (AIR) thereby opens the path for secondary air to the exhaust channels of the cylinder head.
The following list pertains to Fig 1.
- From air filter housing
- Secondary Air Injection (AIR) Pump Motor -V101-
- Component location, see SECONDARY AIR INJECTION (AIR) PUMP MOTOR -V101-
- Removing and installing, see SECONDARY AIR INJECTION (AIR) PUMP MOTOR -V101-, REMOVING AND INSTALLING
- Secondary Air Injection (AIR) Pump Relay -J299-
- Component location, see SECONDARY AIR INJECTION (AIR) PUMP RELAY -J299- .
- Motronic Engine Control Module (ECM) -J220-
- Combination valve for secondary air injection (right)
- Component location, see COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR)
- Checking, see COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR), CHECKING FUNCTION AND PROPER SEAL
- Removing and installing, see RIGHT COMBINATION VALVE FOR SECONDARY AIR INJECTION, REMOVING AND INSTALLING
- Secondary Air Injection (AIR) Solenoid Valve -N112-
- Component location, see COMPONENT LOCATION SECONDARY AIR INJECTION (AIR) SOLENOID VALVE -N112-
- Check-valve
- Installed position (light/dark side): Arrow points in direction of flow, as shown in figure.
- to Intake manifold
- Combination valve for secondary air injection (left)
- Component location, see COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR)
- Checking, see COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR), CHECKING FUNCTION AND PROPER SEAL
- Removing and installing, see LEFT COMBINATION VALVE FOR SECONDARY AIR INJECTION, REMOVING AND INSTALLING
- Vacuum reservoir
- Installation location: Under wheel housing liner in front left wheel housing