Quote:
Originally Posted by VolvoRob38
Thanks Dave,
I tried clearing the codes and going for a drive. The only code to persist was this EMC 6620 Glow relay module - faulty signal.
I recently learnt that the glow plugs are activated by opening of the drivers door to pre heat the engine. Looking at the hidden menu on the dash I have DDM DTC SET (Driver Door Module), and was wondering if this could be link. This has been on their many months now, I thought it was related to driver door airbag or something.
The reduced engine performance msg does come up when I start the engine, or when I turn the key to position ll, but not sure if that is coming up because I haven't cleared it yet from the first time it popped up, which was driving a little aggressively around a roundabout.
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I don't know or use VIDA but at an edumacated guess i'd say DDM DTC SET translates as :
DDM = Drivers Door Module (as you've already said)
DTC = Diagnostic Trouble Code
SET = Set - status report so there's a DTC with information on a problem with the DDM
With that in mind, do you have any problems with cold starting?
Also does the courtesy light work when the door is opened? If not, i'd have a look at that, might be a blown bulb, switched off at the light or the door pin switch or wherever the switch is on yours (possibly in the handle to trigger the courtesy light and glow plug relay at the time you lift the handle) and check that all works. Sometimes the ECUs depend on the bulb working as a pull-up resistor to the ECU and when the bulb is turned on by the door pin switch or similar going to earth, it pulls the ECU input low triggering the timing circuitry.
Not sure if that will apply to yours but many others work that way, reasonable to assume that as a good starting point, even if it's wrong you may uncover the problem anyway by investigating that.
Don't forget to clear the DTCs (codes) before testing each time or you won't know if you've found the fault.