W2B A ECM

[Route 66]

MY ECM HAS A FALT CODE 34 I CANT CLEAR. I WOULD LIKE TO BUY A NEW OR GOOD USED ONE, ANYONE HAVE ONE THEY WANT TO SELL. I HAVE A 1993 ZR1.

THANKS E.....

[gbmidyear66]

Are you sure its your ECM?

CODE 34
Trouble Code 34 indicates that the Manifold Absolute Pressure (MAP) sensor is detecting unusually high vacuum in the manifold.
Possible causes include:
1. Faulty MAP-to-ECM connection
2. Defective MAP sensor
3. Defective ECM

- Have you ruled out items 1 & 2?

- Does it pass the self-test on power up (if when you pull the codes with a paperclip on the ALDL you get the flashing 1,2 three times - I believe this means the ECM self-test has passed)

- ECM's are not that common to find ( I may be in the market for one myself...)

[Route 66]

THANKS gbmidyear.
The code 34 Im getting is not from the SERVICE ENGINE SOON. It is set in the LTPWS which the code 34 is the left rear tire. I cant get the ECM to clear that code no matter what I do to clear it. It seems to be in permanent memory. I can't understand why. I thought I would try a new ECM if I can find one.

[gbmidyear66]

I don't think your issue is with the ECM, the LPTWS systrem has its own conrol module which you can reset.

I believe you can clear the LPTWS codes by grounding pins on the ADLC (under dash in front of driver) terminal 6 to 5, three times in ten seconds (with ignition ON, car not running).

The control module should confirm that its memory has been cleared by lighting both the "L0W/FLAT TIRE" and "SERVICE LTPWS" lamps at the same time.

[XfireZ51]

You need to deal w the CCM not the ECM.