ECU on Post 99 Diesel Bongos

[Ian]

(Posted on behalf of Alex at Direct Campers)

This problem occurs on "new shape" diesel Bongos and we have come across it on a few occassions, but never managed to solve it. If the ECU detects a problem with either the gearbox or the engine, it sends out an instruction to go in to "safe" mode (or "limp" mode as we prefer to call it). Using the diagnostic codes, the problem is then fixed, and off we go again.

BUT on some late edition Bongos, the ECU still thinks there is a fault, and reverts to limp mode. Is there some way of instructing the ECU that all is well again, and bypassing the limp-mode instruction?

[321Away]

Ian get alex to give me a call and i'll have a chat with him about exactly what he's got going on, i'll be at 321 Away (01189 328232) til 3 today

Julian

[DemonAV]

...
BUT on some late edition Bongos, the ECU still thinks there is a fault, and reverts to limp mode. Is there some way of instructing the ECU that all is well again, and bypassing the limp-mode instruction?

This means that the problem is not resolved.
What's mistake was in the car?
And I do not know of solutions to circumvent the safe-mode of ECU.

[321Away]

do we know what fault codes they're getting?

Julian

[Rhinoman]

I would suggest looking at the circuit diagram to determine how to reset the ECU by removing the back up power supply. On some Japanese vehicles the back up power is sourced from the same supply as the interior light. On a later model I would expect it to be possible via the serial diagnostic port but I haven't looked at one of those ECUs yet.

[321Away]

The problem is in hand and am waiting on call fom their mechanics to discuss, its not an ecu problem its a re-curring fault, always thought ecu reset is battery - disconnect and foot on the brake pedal for 20 secs

Julian

[Welshcav]

Its the same as mine got the fault codes fixed but light still coming on, van drives as normal just the annoying flashing light.

Karl

[321Away]

Karl have you tried replacing the 2 pin water temp sensor? have you read the code

Julian

[Welshcav]

Julian I have tried all the fixes that you and others have previously mentioned, not sure what codes are showing now they were p0400 and p1228 but turbo actuator changed everything cleaned, gasket changed, new vaccuum valve, egr cleaned, fuel additive, sensors cleaned and checked.Havent got access to a diagnostic machine now garage stated that the codes were the same when i got it back but it all drives as it should its bizarre. Not tried water temp sensor. Light comes on when van up to temp but no other symptoms thats why i think the ecu just needs reset properly.

[DemonAV]

...not sure what codes are showing now ...

just try to get it: http://translate.google.ru/translate?hl ... emid%3D266 it is easy

... i think the ecu just needs reset properly.

This is not right. If you turn off the ignition more than 10 minutes, then turn on the ignition, control module re-interrogates the sensors of the control system. If no error, the diagnostic trouble codes are stored in memory and no displayed on the dashboard.

Read new codes.

[321Away]

problem is the fault codes 1228 and 0400 are common, BUT it doesnt tell you whats causing them, only that the vacuum system has gone into shutdown,if you've changed valves,removed gasket, the water temp sensor is your last suspect item. Find it curious your saying your still getting performance but have the flashing glow light? i'd check what your actuator is doing when the light is flashing,as if your still getting performance with the fault, your turbo isnt working as it should, its simple to wind the vane's all the way open of swap the pipework so its constantly open, great for performance, bad for turbo

Julian

[Welshcav]

Can you give me step for a hint regarding water temp sensor? How do I check what the actuator is doing and how do I know if pipework is reversed?

[321Away]

lift the passenger seat with the engine running and the actuator rod should be bouncing back and forth, and it should puxh all the way to the back when the glow plug light comes on, if the rod is wound too far in the you wont see any thread. The vacuum piping for the reference (little brown thing fixed to main rail), the 2 vertical pipes going onto it at one end, the main inlet should be on the pipe nearest you, if they're reversed it just pulls the vanes wide open and the turbo runs flat chat.

Only way to test water temp sensor is to get hold of another one and plug it into the loom with the other in the engine and see if it cures the fault, will give you a place to start .

Julian

[Welshcav]

The actuator rod is solid and not moving at all engine on or off and with light on (assuming I,m looking at the right thing)
, pipework appears to be connected correctly?

[Welshcav]

The actuator rod is solid and not moving at all engine on or off and with light on (assuming I,m looking at the right thing)
, pipework appears to be connected correctly?