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[Boditza]

I have this fault code but i don't know how to get rid of it.. it says Engine running signal low but what does it talk about??

[Kneepad]

Check code again, it does not appear to be a valid code.

[Brikhead]

Check code again, it does not appear to be a valid code.

Yes it is, it may be to do with the speed signal sensor in the vp44 fuel pump...

[Boditza]

Check code again, it does not appear to be a valid code.

Yes it is, it may be to do with the speed signal sensor in the vp44 fuel pump...

and where is that?? it also starts a little slow.. it revolves the engine 2-3 times before it starts. can you please post some pics.

[Kneepad]

Check code again, it does not appear to be a valid code.

Yes it is, it may be to do with the speed signal sensor in the vp44 fuel pump...

Interesting, don't see it on the OOF fault code list.   :-/

[Boditza]

they are present in autodata

This is what i could get out out of tis 2000

B-001      DIAGNOSTIC TROUBLE CODE
P1590      Engine Running Signal Low Input 
Short to ground or interruption in circuit to control unit terminal 39
Concerned Terminals:
1, 2, 39

Work Order Description 

Ignition OFF
Disconnect wiring harness connector from:
Diagnostic tester
Ignition ON
Engine running at idle speed, operating temperature
Increase engine speed to 3000 rpm
Measure voltage between the following terminals:
Battery Voltage (Positive Terminal)
&
Ground

  nominal value 13.5 ... 14.5 V 
if above are not true then : Defective component: G2 Alternator ; if they are true then

Work Order Description   

Ignition OFF
Disconnect wiring harness connector from:
K70 Control Unit - Diesel
(Wiring Harness Connector 81P )
Ignition ON
Connect test lamp ( 55 W ) and multimeter in parallel and measure voltage between the following terminals:
K70 Control Unit - Diesel
Wiring harness connector (wiring harness side) terminal 39 (81P)
&
Ground

 Nominal Value   greater than 11 V 
if above are not true then:
High transition resistance between:
S1 Switch - Starter
Wiring harness connector (wiring harness side) terminal 15
&
K70 Control Unit - Diesel
Wiring harness connector (wiring harness side) terminal 39 (81P)

and if true
Work Order Description   Nominal Value 

Connect test lamp ( 55 W ) and multimeter in parallel and measure voltage between the following terminals:
K70 Control Unit - Diesel
Wiring harness connector (wiring harness side) terminal 1 (81P), 2 (81P)
&
Battery Voltage (Positive Terminal)

nominal value:  greater than 11 V 
if these are not true either then :
High transition resistance between:
G1 Battery
Wiring harness connector (wiring harness side) terminal 31
&
K70 Control Unit - Diesel
Wiring harness connector (wiring harness side) terminal 1 (81P), 2 (81P)

but if true
Defective component:
K70 Control Unit - Diesel


if someone knows the wiring and what joints i should check please post some pics here so that i can see where to check because my hunch is that is a non-perfect contact somewhere but i don't know what g2 k70 etc are