sierrafery
Well-Known Member
Had the codes cleared and read back (after ACE red light) when it was warmer weather:
Pressure Signal out of range
Directional Control Value fault
System temp too high
I'm convinced it's related to heat based on the red light only triggers in warm (25-30deg C) ambient and either after 30 mins regular driving in town towing the caravan, or after a 45 min run and stopping at traffic lights etc (as heat builds). The ACE red light can be reset upon engine restart and it's gone (for a while).
BTW I have been quoted 3k to replace the ACE system!!!
Questions for the gurus:
I know the ACE pressure sensor is on the DCV block., but where's the ACE temperature sensor located?
Does the temp sensor measure ACE fluid temperature or something else/both (DCV block?)
Has anyone stripped the DCV block and repaired?
I suspect it's a PCB solder joint somewhere in the DCV block, maybe on the solenoids based on the fact the ABS modulator (three amigos) suffers with this.
Are there any PCBs within the DCV block?
Your thoughts most welcomed.
Cheers
Lea
i dunno how i missed that when it was "warm" sorry, but better later than never
...so dont tell me you used a nanocom on it...cos if it's so you might 'walk in the dark'...nanocom is completely unreliable with ACE1. there's no temperature input into the ACE ECU from nowhere, that code is a protocol error IMO
2. the pressure signal code(if it's real) is generated by the transducer
3. a DCV fault must not come alone, it must be pointed to which DCV, 1 or 2
the valve block has no electrics within just pipework and mechanically actuated valves(operated by the external solenoids)
use a hawkeye or T4 to read the codes...but if u used one of these and the system makes those warning tricks you've described and it's not in locked bars i rather suspect an ECU failure
if a reliable tester gives you a DCV(1 or 2) and pressure fault codes replace the pointed DCV solenoid and the transducer and IMO it will be good
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