78(8 Fuel Pump System Malfunction

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M16/6 (throttle valve regulation part),practical potentiometer 1 and 2:signal voltage error or regulation malfunction. Cylinder 8 fuel injector)(P0208. Been trying to find out what exactly could cause this fault code - ‘Fuel Pump System Malfunction (Short)’. ECU Code 78 (8) on 3.0 D4D 2003.

6A-8 ENGINE MECHANICAL (4JK1/4JJ1)

Trouble Shooting

Engine does not turn over

Condition Possible

Cause Correction

Dead or weak battery

Charge battery

Replace battery

Incomplete circuit

Connect

Repair

Starter motor brushes stuck, worn,
or broken

Replace brushes

Starter motor does not rotate

Starter motor internal damage

Repair motor

Ring gear abrasion

Replace ring gear

Starter motor not meshed with
flywheel

Magnetic switch (starter motor) not
properly adjusted

Adjust

Dead or weak battery

Charge battery

Replace battery

Insufficient contact pressure
between starter motor brushes and
commutator

Adjust pressure

Armature (starter motor) stuck

Repair armature

Starter motor pinion meshed with
ring gear but does not rotate

Engine internal damage (Seizure)

Repair engine

Engine turns over but does not start

Condition Possible

Cause Correction

Air in fuel system

Bleed air from fuel system

Air entering fuel pipe

Replace pipe and bleed air from
fuel system

Empty fuel tank

Replenish fuel

Clogged strainer (fuel suction)

Clean or replace strainer

Clogged fuel pipe

Clean or replace pipe

Feed pump malfunction

Replace pump

Use of wrong fuel for prevailing
temperatures

Drain existing fuel and replace with
appropriate fuel

Fuel is not delivered to fuel supply
pump

Clogged fuel filter

Replace filter

Loose injection pipe connections

Tighten connections

Loose or broken electrical
connectors

Tighten and/or replace connectors

Bad rotational sensor

Replace sensor

Fuel is delivered to fuel supply
pump

Engine control system malfunction

System diagnosis