MEMS Coded Signal (Electrical)
- Make
- Land Rover
- Model
- Freelander Workshop Manual
- Year
- 1998–2000
- Section
- Description and operation › MEMS Coded Signal
ElectricalMEMS Coded Signal
MEMS Coded Signal
The CCU sends a coded signal to the engine control module, activating the MEMS electronic engine management systems when ignition on is sensed. The MEMS coded signal is as follows:
- If vehicle is mobilised, the CCU will initiate MEMS coded signal transmission from ignition on until passive immobilisation occurs.
Passive Immobilisation Repeat
If the re-mobilisation of the engine occurs by whatever means and the CCU does not sense ignition on in 5 minutes, the passive immobilisation will be activated and the engine and ignition will be immobilised.
The CCU alarm inputs and outputs are shown in the following table:
| INPUTS Ignition sense (position II) Key lock request Key unlock request RF signal Driver door sense Passenger door sense Bonnet sense Tail door sense Volumetric signal Roof off sense |
| CCU |
The CCU immobilisation inputs and outputs are shown in the following table:
| INPUTS Ignition sense (position II) RF signal Driver door sense Key unlock request Oil pressure sense |
| CCU |
| OUTPUTS Passive coil (out) Starter relay enable MEMS coded signal Alarm LED BBUS BBUS ST Hazard flasher relay Horn relay Volumetric power Volumetric link RF power |
| OUTPUTS Passive coil (out) Starter relay enable MEMS coded signal Alarm LED RF power |
Parts & tools for this job For 1998 Land Rover Freelander
- TOOLDigital multimeterSearch: automotive digital multimeter
- PARTAssorted fuse kitSearch: car fuse assortment kit
- TOOLWire crimper and connector kitSearch: wire crimper connector kit
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