Limp Mode codes 0702 and 0407

Hi all
Have been stalking this forum for the past week in an attempt to solve the following intermittent problem. Sorry about length of post.

Vehicle Navara D22 ZD30 motor.
The problem is an intermittent one and has been occurring for nearly 2 weeks. The vehicle will travel for nearly approx 11 km and then go into limp mode with MIL on and zero tacho reading.
Have extracted the codes 0702 and 0407 which according to the manual are P2 TDC Pulse Sig and Crank Pos Sen (TDC).
The following procedure was taken on test run.
1: Clear codes
2: Travel at between 80 and 100km per hour.
3: At approx 11km engine in limp mode zero tacho reading.
4: Stop and Read codes, result = 0702 and 0407
5: Clear codes
6: Restart, engine revs up by itself MIL back on.
7: Wait approx 5 mins restart MIL is off
8: Travel back home without incident.
9: Read codes result = 0407
10: Leave car to cool down for 2 hours.
11: Clear codes
12: Perform the following procedure taken from manual.
WITHOUT CONSULT-II
1) Turn ignition switch “ON” and wait at least 2 seconds.
2) Start engine and run it for at least 2 seconds at idle speed.
(If engine does not run, turn ignition switch to “START” for at
least 2 seconds.)
3) Turn ignition switch “OFF”, wait at least 5 seconds and then turn
“ON”.
4) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
5) If DTC 0407 is detected, go to “Diagnostic Procedure”, EC-882.
If DTC 0702 is detected, go to “Diagnostic Procedure”, EC-899.

Check code Result result = 0505

also performed
WITHOUT CONSULT-II
1) Turn ignition switch “ON” and wait at least 2 seconds.
2) Start engine and run it for at least 2 seconds at idle speed.
(If engine does not run, turn ignition switch to “START” for at
least 2 seconds.)
3) Keep engine speed at more than 2,000 rpm for at least 10
seconds.
4) Turn ignition switch “OFF”, wait at least 5 seconds and then turn
“ON”.
5) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
6) If DTC is detected, go to “Diagnostic Procedure”, EC-923.

Result from checking codes = 0505 (No DTC)

Any suggestions on further testing would be greatly appreciated.

check crank sensor
check engine and sensor earths
check pump connections

if all that ok then most likely its the pump ecu going faulty. remove pump for repair.

Thanks for the input Tweak'e
How much do you have to strip of to get to crank sensor, had a quick look and seems quite a job.
Got side tracked and disconnected the NPS on a hunch, 0702 and 0407 problems are still there but I'll swear that the truck is going a lot better, seems more responsive on the accelerator. And when have to stop due to limp mode all I have to do is stop switch of and restart straight away

Just a belated post to the Limp Mode codes 0702 and 0407 problem
Fixed this problem by replacing the "Crankshaft TDC position sensor, vast improvement in fuel consumption (was up to 20l per 100km.
Job can be done in a day once parts are delivered, Cost of the sensor from nissan was
$201,00 gst inclusive, replace the motor drive belt at the same time as it had slight squeak developing.
For those who may have the same problem I did both the above in the following order.
Undo negative terminal.
Turn lights on and off to clear ECM so that later testing is with clean slate
Drain water from radiator.
Remove under engine pan.
Remove bottom radiator hose from radiator.
Remove lower fan housing skirt.
Remove upper radiator hoses from radiator.
Remove radiator overflow tank.
Disconnect radiator from body by removing brackets.
Pull radiator straight up to release it from plug holes at bottom of radiator.
Remove motor fan (note position and way facing).
Pull cabling from top of insulating plate housing
Remove insulation plate housing which covers sensor lead cover,
At this point changed the motor drive belts (very simple task if done here).
Unplug sensor cable from loam.
Remove sensor cable tie down bolt.
Remove sensor from cradle by undoing hold down bolt.
Insert new sensor after cleaning hold down bolt and surrounding surface.
If this is a straight forward replacement of sensor there should be no need to
reset clearance of sensor and crankshaft protusions as new sensor is same size as old.
Replace all in reverse order and happy driving "don't forget the water and check it after test drive".