Gas injection and ignition system (PMS) Diagnosis troubleshooting

AD07.54-D-5000A

Gas injection and ignition system (PMS) Diagnosis troubleshooting

25.11.2019

Engine

111.979 in model 902.0, 903.0, 904.0

with code MS7 (NGT (Natural-Gas Technology) Sprinter)

 Danger

Risk of explosion due to escaping combustible gas or overheating of gas cylinders.Risk of injury caused by burns to skin and eyes. Risk of frostbite to body parts caused by escaping gas and by touching components near the valves when emptying gas cylinders. Risk of poisoning or suffocation caused by inhaling gas.

Remove any sources of ignition.
Protective clothing, safety gloves and safety glasses must always be worn.
Ensure that the work area is adequately ventilated.
When working on vehicles at ambient temperatures over 60 °C, all gas cylinders must be removed.

AS00.00-Z-0018-01A

 Danger

Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)

Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.

AS00.00-Z-0035-01A

Diagnosis of gas injection and ignition system, prerequisites

AD07.54-D-2000A

Troubleshooting

Complaint

Possible cause

Notes

Remedy

Transmission variant not detected by control unit

Programming not properly carried out

Start engine and V-signal > 10 km/h

Vehicle version still not detected

AD07.54-D-6010A

Engine starts reluctantly and is reluctant to speed up

Coolant temperature sensor

Injection valves, actuation and injection duration

AD07.54-D-6000-01A

AD07.54-D-6000-11A

AD07.54-D-6000-12A

Engine fails to start

Power supply for control unit

Crankshaft position sensor

Fuse F61, fuel pump relay

Injection valves, actuation and injection duration

Ignition output stage 1
and/or 2

AD07.54-D-6000-24A

AD07.54-D-6000-17A

AD07.54-D-6000-21A

AD07.54-D-6000-11A

AD07.54-D-6000-12A

AD07.54-D-6000-15A

AD07.54-D-6000-16A

Engine has rough idling

Lambda sensor

Throttle valve adjusting motor, throttle valve flutters

Injection valves, actuation and injection duration

AD07.54-D-6000-08A

AD07.54-D-6000-28A

AD07.54-D-6000-11A

AD07.54-D-6000-12A

Irregular engine running after activation of refrigerant compressor
(Vehicles with air conditioning system)

Idle speed increase signal from air conditioning system control unit

Mechanical end stop of closed throttle valve not detected

AD07.54-D-4000A

Engine has rough idling in case of switched on consumers

Throttle valve positioning motor
Mechanical end stop of closed throttle valve not detected

AD07.54-D-4000A