Disable Malf or Mask & Malf?

Holden/Delco Tuning. ALDL, OBD 1.5. Circa 1989 to 2004.
VX L67 Getrag
Posts: 2971
Joined: Sun Aug 02, 2009 11:16 am
Location: Bayside, Melbourne, Victoria

Disable Malf or Mask & Malf?

Post by VX L67 Getrag »

Hey All,

Just wondering what does everyone else do?

I normally disable both Malf & Mask but I guess thinking about it logically if you just disable the process of it then it wouldn't need to be masked?
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charlay86
Posts: 586
Joined: Thu Sep 17, 2009 4:00 am
cars: VT S1 SS (L67)
Location: Perth, WA

Re: Disable Malf or Mask & Malf?

Post by charlay86 »

The first set of DTC masks in the cal disables processing of the code to set the DTC, so it will never be set; additionally, the routine that checks if any codes are set ( and latches them in memory, sets the MIL and saves them as history codes) checks those bit flags before it performs any of those actions.