As some of you may have noticed, some later compacts came with EWS 3 instead of the more usual EWS2.
EWS 3 (as opposed to EWS 3.2) has only limited information available on it.
EWS3-D was introduced from 9/98 onwards. Although the Engine ECU is the same part, the EWS3 controller has a different plug.
The plug is known as X1659
Pin 1 -2.5mm Black/Yellow - Output to starter relay
Pin 2 -0.35mm White/Violet - connects to any diagnostic line (K-Line)
Pin 3 - 2.5mm Green/Black - Start signal (+12v) from ignition barrel
Pin 4 - 0.35 Green - Code signal to ECU -> Pin 10 on ECU.
Pin 5 - Red/Yellow -Permanent Power supply from fuse 31 / fusebox.
Pin 7 - Brown - Ground
Pin 8 - 0.5mm Black/Green from ZKE/ZVM body control module (deadlocked = no start)
Pin 9 - 0.5mm Brown/Black - Gear Selector switch (Park/Neutral) for automatic transmission
Pin 12 - 0.35mm Black - TD/Engine RPM signal
Pin 13 - 0.35mm Blue - Data line from send/receive module
Pin 14 - 0.5mm Blue/Red/Yellow - Vehicle Alarm Signal - (active alarm = no start)
Pin 15 - 0.35mm Black/Green CODE function from EWS. Grounding this wire stops the vehicle starting
These are the important pins-
5 and 7 ground to power the unit up
1 and 3 - The EWS box contains a relay that interrupts the starter motor. Bridging the pins will always allow the
engine to turn over, but without the EWS code, the ECU will not inject fuel or spark. 3 is power in, 1 is power out to the starter.
2- Diagnostic line - trust me, this will come in handy - it is bi-directional so can be added into any part of the K-Line (also known as TxD) The car will run without this, but it should be connected up.
4 - Coded EWS signal to the ECU. This signal is the serial number from the ECU. If it does not receive the signal, the ECU will refuse to start.
13 - Data line from the send/receive module. The send receive module is a small black modem that connects to the ring antenna around the ignition barrel. There are 2 small plugs on this, a 2 wire plug which goes to the ring antenna, and a 3 wire plug of power, earth, and the data line that links into pin 13 of the EWS.
Plug Name - X1805
Pin 1 - Ground
Pin 2 -Permanent Live from fusebox F31
Pin 3 -0.35mm Brown/Black - 12v when clutch depressed
Pin 4 - 0.35mm White/Violet - connects to any diagnostic line (K-Line)
Pin 5 - 0.35mm Black - TD engine RPM signal from ECU/Instrument Cluster
Pin 7 - 2.5mm Black/Yellow - Output to starter relay
Pin 8 - 2.5mm Black/Green -12v from Ignition switch / Start Signal
Pin 9 - Power supply from fuse 41- hot in acc/run/start.
Pin 10 - 0.35mm Yellow/Blue - Direct the EWS ring antenna
Pin 11 - 0.35mm Yellow/Brown - Direct to EWS ring antenna
Pin 12 -
Pin 13 - 0.5mm Black/Green - From ZKE Body control module
Pin 14 - 0.35 Green - Code signal to ECU -> Pin 10 on ECU.
Pin 15 - 0.5mm Blue/Red/Yellow - Vehicle Alarm Signal - (active alarm = no start)
EWS3 removes the Send/Receive module and intergrates it into the EWS controller.
Important pins -
1 and 2 - main power supply
Pin 3 - These cars will have a clutch switch fitted. Bridge this pin to 12v+ to remove it
4- Diagnostic line- Please connect!
7-8 These are the starter interrupt wires. bridging these will always allow the engine to turn over, but may hide other problems.
8 is power in, 9 is out to the starter
9- Ignition on- this powers up the unit from "sleep"
10-11 - to the EWS ring antenna
14 - EWS serial number "unlock signal" to ECU.