Erberspacher not working

[Wolfy]

Hi all.

I've got an erberspacher D2 that I'm having some problems with.

I bought it a few years ago and had it tested and it was working just fine. I've checked the connections and they seem fine. I'm getting the right voltage at the connections to the pump but no pumping. When I put 12v direct to the pump I get a single click.

Any suggestion would be gratefully received.

Many thanks.

[lloydy]

If its not working with a direct feed it must be goosed. OBG might know a way they can be stripped and fixed, new ones are around £50...

[Oldiebut goodie]

The pump is working - it pulses to pump, if you just apply power once you will only get one click.
Have you checked the power at the heater? (not just the battery) How have you checked the connections? What is the fault code?
From the manual:

• Check
– Fuel in the tank?
– Fuel pipes leaking? (visual check)
– Summer diesel in the fuel pipe?
– Combustion air system or exhaust system damaged or
blocked?
• Electrical components
– Cables, connections damaged?
– Contacts corroded?
– Fuses defective?
– Incorrect wiring? (short circuits, interrupted / broken)
• Measure battery voltage
– Battery voltage < 10.5 volt, the undervoltage protection
of the 12 volt heater has triggered.
– Battery voltage < 21 volt, the undervoltage protection of
the 24 volt heater has triggered.
• Measure voltage supply (Cl 30)
Disconnect the 16-pin connector S1 / B1 and measure the
voltage applied at connector B1 between chamber 1 (cable
2.52 rt) and chamber 10 (cable 2.52 br).
If it differs from the battery voltage, check the fuses, the
supply cables, the negative connection and the positive
support point on the battery for voltage drop (corrosion /
interruption).
• Check switch-on signal
Disconnect the 16-pin connector S1 / B1 and then switch on
the heater at the control unit.
Check whether voltage is applied in the connector B1
between chamber 4 (cable 0.52 ge) and chamber 10 (cable
2.52 br).
If no voltage is measured, then check the supply cable (cable
0.52 ge), the 5 A fuse (item 2.7.1 in the circuit diagram) and
the control unit.
• Check control unit
Disconnect the connector at the control unit, jumper between
the red 0.52 cable and the yellow 0.52 cable.
If a voltage is measured in connector B1 between chamber
4 (cable 0.52 ge) and chamber 10 (cable 2.52 br), then
replace the control unit.

[lloydy]

So, just for my own clarification... (might be testing another pump soon) if you just give it 12v you'll get one pulse? I'd have to keep interrupting the power to simulate its normal operating mode?

[Wolfy]

I'm making a permanent connection to the pump and getting just the one pulse. I don't know if the unit will interrupt the supply to the pump enabling pulsing or if the pump will pulse whilst receiving a constant 12 v. I'm gonna work through the list from goldie and see where I get.

Thanks all.

[Oldiebut goodie]

So, just for my own clarification... (might be testing another pump soon) if you just give it 12v you'll get one pulse? I'd have to keep interrupting the power to simulate its normal operating mode?

Correct.

[Oldiebut goodie]

I'm making a permanent connection to the pump and getting just the one pulse. I don't know if the unit will interrupt the supply to the pump enabling pulsing or if the pump will pulse whilst receiving a constant 12 v. I'm gonna work through the list from goldie and see where I get.

Thanks all.

Don't put constant 12v to the pump whilst still connected to the heater as you can blow your ecu!
The pump will not pulse with a constant power source - that function is carried out by the ecu.

[lloydy]

So, just for my own clarification... (might be testing another pump soon) if you just give it 12v you'll get one pulse? I'd have to keep interrupting the power to simulate its normal operating mode?

Correct.

Good info, cheers

[Wolfy]

Many thanks oldiebut goldie.

I did try the constant 12v with the ECU disconnected. I'll check all the connections again as I am getting 12v to the pump and the fan is wiring away.

All the best.

[Mocki]

Not sure about yours but with the dl1c if the glow plug is faulty or disconnected the pump won't operate past one click. Worth checking the connections on the glow plug and the element .