Range Rover
- When the engine is started, the ECM checks the engine coolant temperature. If Engine Coolant Temperature (ECT) indicates that coolant temperature is less than 131°F (55°C), ECM will activate the Secondary Air Injection (SAI) system. Ensure ECT sensor is operating properly.
- ECT sensor ground is at ECM 52-pin connector C0636 terminal No. 21 (Red/Black wire). ECT sensor input analog 0-5 volt signal is at ECM 52-pin connector C0636 terminal No. 22 (Green/Blue wire). See Figure and Figure
. See WIRING DIAGRAMS
article. See Fig 1.
- When SAI pump relay is energized, battery voltage is supplied to relay coil connector terminal No. 5 via fusible link No. 2 (50-amp) located in the engine compartment fuse/relay box. SAI pump relay operation is controlled through ground at ECM 52-pin connector C0636 terminal No. 16 (Brown/Green wire).
- When the main relay is energized, battery voltage is supplied to SAI vacuum solenoid valve connector terminal No. 1 (Brown/Pink wire) via fuse No. 26 (20-amp) located in engine compartment fuse/relay box. SAI vacuum solenoid valve operation is controlled through ground at ECM 52-pin connector C0636 terminal No. 4 (Pink/Blue wire). SAI vacuum solenoid valve is energized at the same time as the SAI air pump is energized.
Courtesy of LAND ROVER NORTH AMERICA, INC.