quote:

ORIGINAL: roverguy7

once again, dont know about what exactly youre going to do here, but the rover part is updated, not the original one that came with the car, its the update that will take care of this issue, if it makes a difference

quote:


12/06/96
19/08/96/US
SUBJECT:
PRIDE - GEMS Code P0125
MODEL:
Discovery
Discovery
Discovery
AFFECTED VEHICLES:
LP
LJ TA163104 to TA200000
LJ TA501920 to VA534107
LJ TA700000 to VA703240
DETAIL
Vehicles equipped with GEMS may store P code P0125 in the ECM. This code may be stored by a number of reasons. Follow the details below for guidance.
The diagnostic steps and repair procedures detailed in this bulletin were developed as an element of the Land Rover Way Operation PRIDE. This TIB provides a library location for PRIDE information within the Land Rover North America technical literature system.
ACTION REQUIRED
If diagnostic trouble code P0125 is retrieved during TestBook diagnosis, follow the diagnostic procedure below.
PARTS INFORMATION
PRM9631 - PROM Set
Removal


1. Make sure that the ignition key is turned off.
2. Remove washer reservoir and set aside.
3. Remove ECM cover using suitable tool to remove clips.

NOTE: Ensure that the white anti-backout strips have not fallen out of the connectors. If so, replace them in the connectors.
4. Unplug the ECM connectors. Remove ECM.

5. Place ECM, red connector side up, on grounded antistatic mat. Be sure to wear grounding wrist band.
6. Remove five Torx(R) screws (t2O) from cover, and remove red connector side.
NOTE: Circuit board is easily damaged. Do not pry covers off using screwdrivers or the like.
7. Remove 8 Torx(R) screws holding circuit board.

8. Fold circuit board over onto mat, exposing chips .





9. Using suitable pliers, carefully remove blue and green PROM covers .
10. Remove the exposed PROM with PROM puller supplied with anti-static mat.



Make sure that the notch on the PROMs are in line with the notch on the PROM sockets. PROM notch will be oriented towards the red connector.
1. Carefully install new PROMs, noting that one PROM has 28 pins and the other 32 pins.
2. Check for bent pins before replacing PROM covers.
3. Position circuit board and fasten with screws.
4. Install outer cover. Fasten with screws removed earlier. Torque to 2.25-2.82 Nm (20-25 lb. in).
5. Apply the self-adhesive update label on the side of the ECM to signify that the update has been done.
6. Reconnect wire harnesses and install ECM.

7. Install ECM protective cover and washer reservoir.

VERIFICATION AND ROADTEST
A. Switch on ignition. The fuel pump should run for a short period. Listen for any unusual noises such as injectors operating or relays clicking which would indicate a problem.
B. Observe that the Check Engine light comes on and stays on during the bulb check. If not, check the multiple connection. If necessary, replace the ECM.

C. If the vehicle fails steps A or B, recheck the multiple connector pins and socket. If this does not resolve the problem, check that the PROM was installed correctly.
8. Perform quality check procedure below.
QUALITY CHECK PROCEDURE
Start engine and observe the following:
1. The Check Engine light remains out.
2. Idle speed smoothness is stabilized.
3. Switch on A/C, and note idle speed compensation.
4. Rev the engine; no misfire should be noted.
5. Select drive and note idle speed compensation - automatic only (brakes applied).
9. Roadtest the vehicle (drive cycle B per service bulletin W96-007).__________________