Quadzilla iQuad - no mph

[Mopar1973Man]

PCM must remain hooked up its the source of the network. This is why 24V retro fits in to Ford or Chevy have issues because all they use is a ECM and there is now no OBDII port since the PCM is the master controller. The ECM is secondary. 

[SavageTusk]

Hm, on all tests

 

4.7 on CCD bus +

3.9 ON CCD bus -

 

Just curious while I'm waiting for my PCM to get here, wonder why the radio is part of the CCD network?

Edited October 31, 2018 by SavageTusk

[Chris O.]

4 hours ago, SavageTusk said:

Just curious while I'm waiting for my PCM to get here, wonder why the radio is part of the CCD network?

If you do have Infinity factory radio and steering wheel volume control buttons then the buttons are connected to Highline or Premiumline Central Timer Module (CTM), the CTM relays the buttons commands to the radio via the CCD Bus.

[SavageTusk]

15 hours ago, Chris O. said:

If you do have Infinity factory radio and steering wheel volume control buttons then the buttons are connected to Highline or Premiumline Central Timer Module (CTM), the CTM relays the buttons commands to the radio via the CCD Bus.

 

So if the radio is not being used by the CCD network, couldn't these be terminated going to the radio harness so there's no chance that there is any bias from the aftermarket radio?

[SavageTusk]

 ugh,  well I put the new, freshly programmed and tested PCM in and still no mph on the quadzilla.

 

So I get the speedometer reading on the Cluster but not on the iQuad.  I don't even think I can really say it's a truck problem, no check engine light, no codes..yet.  Do I need to trace the bus wires around some more?  I think I've exhausted everything besides replacing the ECM.  

Edited November 8, 2018 by SavageTusk

[Chris O.]

On 11/7/2018 at 5:09 PM, SavageTusk said:

So I get the speedometer reading on the Cluster but not on the iQuad.

Try a simple test of resistance between ECM plug CCD BUS + - and ODBII data link connector (DLC) CCD BUS plug + -. -> (SEE PIC.)

Look for resistance with less than 20 ohms (Ω).

[SavageTusk]

53 minutes ago, Chris O. said:

Try a simple test of resistance between ECM plug CCD BUS + - and ODBII data link connector (DLC) CCD BUS plug + -. -> (SEE PIC.)

Look for resistance with less than 20 ohms (Ω).

Thanks man, I'll give this a go.