EMISSION CONTROL - V8
The ECM connector and pins pertinent for secondary air injection are listed in the following table:
Connector / Pin No.
C0635-23
Description
Signal type
Output drive
Output, drive
Control
Main relay output
Switch to ground
Switch to ground
C0636-4
Secondary air injection vacuum solenoid
valve control
C0636-16
C0636-21
C0636-22
C0637-20
Secondary air injection pump relay control
Coolant temperature (ECT) sensor
Coolant temperature (ECT) sensor
MIL "ON"
Output drive
Ground
Switch to ground
0V
Input signal
Output drive
Analogue 0 - 5V
Switch to ground
Secondary Air Injection System Components
The secondary air injection (SAI) system components (where fitted) are described below:
Secondary Air Injection (SAI) Pump
3
2
1
4
M17 0204
1
2
SAI pump cover
Foam filter
3 SAI pump
4 Pressurised air to exhaust manifolds
The SAI pump is attached to a bracket at the rear RH side of the engine compartment and is fixed to the bracket by
three studs and nuts. The pump is electrically powered from a 12V battery supply via a dedicated relay and supplies
approximately 35kg/hr of air when the vehicle is at idle in Neutral/Park on a start from 20°C (68°F).
Air is drawn into the pump through vents in its front cover and is then passed through a foam filter to remove
particulates before air injection. The air is delivered to the exhaust manifold on each side of the engine through a
combination of plastic and metal pipes.
DESCRIPTION AND OPERATION 17-2-27
| Categories | Land Rover Defender, Land Rover Discovery II, Range Rover |
|---|---|
| Tags | Land Rover |
| Model Year | 1999 |
| Download File |
|
| Document Type | Workshop Manual |
| Language | English |
| Product Name | Discovery Series II |
| Product Brand | Land Rover |
| Document File Type | |
| Publisher | landrover.com |
| Wikipedia's Page | http://en.wikipedia.org/wiki/Land_Rover |
| Copyright | Attribution Non-commercial |
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