Hello to everybody,
I know this subject has been discussed in many threads. I have a 1998 XK8 convertible having the C1095 DTC. I learned that most of the time it is a control module fault (re-soldering the terminals). Before I am going thru the process of removing and opening the module I did the Pin Point tests as outlined in the Manual. I disconnected the control module connector LF37 and ran the tests as outlined.
When I did the A2: "check the battery power supplies to the ABS/Traction Control Control Module for short to battery remove fuse #18 from the engine compartment fuse box and measuring the voltage between LF37, pin 09 (NR) and GROUND I have a voltage reading greater than 3 volts (actually the same reading as with the fuse #18 in place, 12.8 V).
Same when I do test A4, remove fuse 16 and measure voltage between pin 25 and GROUND. The reading is also greater than 3 volts (actually same reading as with the fuse #16 in place. Corrective action says: Repair the short circuit. For additional information refer to the wiring diagram. Has anybody been dealing with this before and what's the corrective action? To my understanding since LF37 is disconnected from the module already and the power supply as well it is not necessarily a fault in the module? Or am I having a wrong thought?
Your help is greatly appreciated! Thank you.
BTW I am very impressed of the effort and the support the forum is giving.

 

I just UNPLUG the pump motor, grab some small 'jumper-leads' and put POSITIVE and NEGATIVE to the motor itself and listen for activation.
(never had a motor failure yet, it was always the module)

There is ONE caveat and that is the pump motor leads from the motor to the module insulation deterioration. Bare wires can 'short-together' and cause problems.

 

service manual pinpoint tests will fry your brain

don’t do them

 

good point..

 

@motorcarman thank you for the detailed explanation, I will have a look into that. I will post the results

 

The pump is a DC motor but you are not trying to make it PUMP, just listen if it makes a 'whirring' noise!
It won't matter what direction it turns for the short time you run it.

 

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@motorcarman It just came to my mind that I might did the pin point test the wrong way-I took measurement at the disconnected electrical connector LF37 -not at the pins of the corresponding socket of the module.
The manual says:
1. Turn ignition switch to the OFF position
2. Disconnect the ABS/traction control control module electrical connector, LF37
3. Measure the voltage between LF37, pin 09 (NR) and GROUND
I measured on the electrical connector, LF37, not at the socket of the module where the connector plugs in.

 

just a quick update, problem solved! First I checked and made sure that the ABS pump motor is working as outlined by motorcarman, again thanks for the detailed information. So I finally removed the module opened it and re-soldered the joints.Everything is back to normal.
@xalty the pin Point Tests can really fry your brain..
Just one final note regarding the Pin Point tests in regards to the manual: LF37, Pin 9 is NOT connected to fuse#18, it's connected to #16, Pin 25 is connected to Fuse#18 and NOT to fuse #16.
The correct connections are shown in the ABS Check Sheet from G Emmerson, JagRepair.com - Jaguar Repair Information Resource which came in very helpful.

Again hank you for the great support from the forum!