Hi. My 2003 fiesta just wouldn't start one day. The immobiliser led flashes for about a minute and and then gives 7 long flashes, pauses then another 7 long flashes, so on. I've checked the fuses and they're fine. Does anyone know what else it could be?

1 hour ago, Yurrtel said:

Hi. My 2003 fiesta just wouldn't start one day. The immobiliser led flashes for about a minute and and then gives 7 long flashes, pauses then another 7 long flashes, so on. I've checked the fuses and they're fine. Does anyone know what else it could be?

Try this not quite sure your model...

 

https://www.youtube.com/watch?v=0kBZeBbb9PM

When the LED flashes you may see a pattern.

Watch it next time and you may be able to work out what code it's flashing

The code is usually repeated about 10 times and will signify a two number code i.e.-

Flash flash pause flash would be code 2,1.

These codes assist in diagnosing immobiliser faults.

If the light flashes rapidly with a long amount of flashes it usually means the key is not recognised at all.

From Fordwiki-

PATS Immobiliser Fault Codes

Introduction

If a fault develops on a vehicle fitted with Ford PATS there are a series of simple checks which can be carried out before proceeding, if necessary, to the FDS2000 diagnostic programme. There are also a number of self-diagnostic two-digit codes which may be displayed by the indicator LED which indicate a specific fault and could avoid the need to proceed with the FDS2000 diagnostic programme.

Note: The indicator LED must be carefully observed and the sequence of flashes noted.

When the two-digit codes are flashed, for example 1:3, a single flash followed by a break, followed by three flashes and a break, will be repeated ten times before the LED finally goes out.

Fault Finding Procedure-

Fault - Engine does not start or crank: LED does not illuminate

PATS system fuses in foot well fuse box. Fit or renew as necessary.

If alarm is fitted check whether LED functions for alarm: If OK go to FDS2000. If not OK check cigar lighter fuse (this also supplies power to
LED).

Fault - Engine does not start or crank: LED flashes rapidly. (Engine is immobilised but key will not cancel immobilisation)

Check: Leave ignition switched on for at least one minute or until LED starts to flash two-digit code. Note the code being flashed and compare with the following list:-

Code Problem Check

1 : 3 Key code not received is the key obscured, try again with different key, key may be damaged/faulty

1 : 4 Partial code only received is the key obscured, try again with different key, key may be damaged or faulty

1: 5 Key not programmed to PATS Programme key

1 : 6 Faulty link between PATS and EEC v module check with FDS2000

Programme key.

Fault: Engine does not start or crank: LED illuminates for 4 seconds and goes out: (PATS is working correctly, possible fault elsewhere in system)

Check:

Starter solenoid relay, renew if necessary. If still no start, Go to FDS2000.

Fault: Engine cranks but does not start. LED illuminates for 4 seconds and goes out (PATS is working correctly, fault elsewhere in system)

Check:

Power to PCM or fuel pump (diesel), if still no start, Go to FDS2000 Check PCM fault, Go to FDS2000 (Petrol and Gas engines)

Fault: Engine starts but LED stays on

Check:

Leave ignition on (engine running) for at least one minute or until LED starts to flash two-digit code 2 : 1 Less than three keys programmed into module: vehicle can be driven but one or two more keys should be programmed into memory.

@Gazcaz Thanks for your help, the LED flashes 7 times so if I understand that as 1:6 then I need to check the link between PATS and EEC v module with the FDS2000. Does this mean I have to take it to a Ford center? Obviously this is not an option for me at the moment with the lockdown so I hope not. If you had to guess what part was faulty could you guess what I should order online?

1 hour ago, Yurrtel said:

@Gazcaz Thanks for your help, the LED flashes 7 times so if I understand that as 1:6 then I need to check the link between PATS and EEC v module with the FDS2000. Does this mean I have to take it to a Ford center? Obviously this is not an option for me at the moment with the lockdown so I hope not. If you had to guess what part was faulty could you guess what I should order online?

Quote

 

Basically the wiring between the immobiliser and the ECU is either damaged or disconnected.

Another thing to do is check fuse 67 in the footwell box, that's the one which covers the immobiliser, and fuse 46 which is diagnostics ,, and also check any connections under the passanger footwell hasnt been undone.Also check the ring behind the ignition barrel is connected...