Having problems with the SRS light staying on ..no code flash (1997) Searched all current posts
My manual does not have a diagram..can you help?
Where is the SRS controller?
I note there is a resistance reading for the bags....what is the value and between what two wires .

English MOT test say that if there is no SRS light ( no bulb/not working) then you do not fail the annual test.

any help welcome.

 

I would suggest you resist the urge to measure the continuity/resistance of the airbags themselves.
The proper way is to measure them THROUGH the SRS module with WDS, IDS etc.

We were warned not to put a multi-meter in the airbag circuit because of the possibility of deploying the airbag with the small current induced by the meter.

The resistance is about 2.1 or 2.2 Ohms. The way I checked the circuit with or without WDS/IDS is to put a 'simulator' in place of the airbag.
I used a 2.2 Ohm resistor in a connector I made from an old airbag harness. I just plugged the simulator in place of the airbag and tested the circuit with a multi-meter or WDS/IDS and if the circuit was intact, (about 2.2 Ohms) I concluded that the airbag itself was likely the culprit.

 

Thanks ..I think the meters you refer to where analog meters. with the modern digital ones the current is virtually Zero.
I am currently considering cutting the wire to the warning light for the mot ( yellow with a white)

 

This is from my Jaguar SRS training manual Service Training Course No. 400.

Wiring Harness
The airbag / SRS system uses a dedicated yellow-covered wiring harness that is independent of
all other vehicle systems. The dedicated harness electrically connects all airbag / SRS system
components. The harness is non-serviceable and must be replaced if faulty. The flyleads of
components that connect to the airbag harness are not colored yellow.

NOTE: The diagnostic module harness connectors, airbag module and cable reel cassette connectors,
are equipped with “shorting bars.” The shorting bars protect against inadvertent airbag
deployment by short circuiting the designated circuits when the connector is separated. Refer
to the applicable vehicle Electrical Guide for the locations of the “shorting bars.”

Wiring harness diagnostic monitoring
The wiring harness is monitored as part of the airbag / SRS system diagnostics.

WARNING: DO NOT ATTEMPT TO
MEASURE CIRCUIT RESISTANCE OR CONTINUITY
THROUGH THE AIRBAG ASSEMBLY:
THE SMALL AMOUNT OF VOLTAGE FROM
THE TESTER MAY TRIGGER AIRBAG
DEPLOYMENT AND POSSIBLY RESULT IN
PERSONAL INJURY. IF A RESISTANCE OR
CONTINUITY MEASUREMENT IS REQUIRED,
DISCONNECT BOTH AIRBAGS FROM THE
HARNESS AND INSTALL THE JAG 7956
AIRBAG SIMULATOR TOOL IN THE AIRBAG
CONNECTORS BEFORE CONNECTING THE
METER. THE AIRBAG SIMULATOR TOOL
RESISTANCE IS 2.5 OHMS.

I made my own airbag simulators from old harness connectors and Red, Red, Gold (2.2 Ohm) resistors.
Different Jaguar models use different harness connectors but the common Ford ones worked for the X200 and X400 (I think)

You can do an online search for Jaguar Training Publication Code 620.
This publication is more in depth but the file size is over 10mb (too large to post here)