Answers

Question

Asked: May 30, 2008 - 08:31 AM

Status: Closed

RePCM on Mazda Miata 2000 PCM that should be replaced, more info.

The code is P1562. The battery was being jumped and the terminals were crossed, resulting with the 80amp fuse needing to be replaced, (please don't laugh). I replace the fuse and the car runs good, but the engine light is on. I took the car to a garage and they could not reset the pcm, and told me that it should be replaced. My question is can I run the car like this or will I damage something ? Also we are talking around $800.00
to replace the pcm. Can I do better on price as Auto Zone could not supply me with a replacement, or is this a dealer only repair?

Thank You For your Time & Knowledge

In Maintenance & Repair > Electrical > Instrument Panel
2 answers - 82 days ago

Watch this Question | Email to a Friend

Report it

Note: Per our Visitor Agreement, Edmunds.com does not guarantee the accuracy of any answers. We recommend that you use common sense when following any advice found here.

Answers

mr_shiftright

Date: May 30, 2008
Time: 12:34 PM

There's a whole set of diagnostics for this problem and you should probably have that done at a shop that knows the step by step procedures.

There is the ROOM fuse to check

Also connection between battery and PCM terminal 1A

Also the connector at the PCM could be corroded or loose.

Also you need the proper tool to reset the code.

Report it

0patience

Date: May 30, 2008
Time: 05:45 PM

I agree with Mr. Shiftright 100%.
He has given excellent advice.
Grounds, the ROOM fuse, battery connections, fusible links and PCM connections can all cause those symptoms.

Do NOT replace the PCM without the diagnostics.

I would have a reputable shop do the diagnostics. Only ask them to do the diagnostics and see what they come up with? Most the time, I see fuses blown or burnt connections.

Report it

PCM on Mazda Miata 2000 cannot be reset (engine li...

Rank	Leader	Points
1.	0patience	70
2.	mr_shiftright	60
3.	docj	50
4.	tony78	30
5.	actualsize	20
6.	simpilot1	20
7.	subearu	20