ECU swap

Tiny
CHRIS KINARD
  • MEMBER
  • 2000 FORD MUSTANG
  • 3.8L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 200,000,000 MILES
Can I take an ECU from a 2004 Mustang and put it in a 2000 Mustang?
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Thursday, August 13th, 2020 AT 2:10 AM

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Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

No, they are different part numbers according to the books.

The part numbers must be exact and then the ECM has to be programmed to your VIN number for it to function.

Why are you replacing the ECM?

Roy
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Thursday, August 13th, 2020 AT 3:51 AM
Tiny
CHRIS KINARD
  • MEMBER
  • 80 POSTS
My diagnostic tool ht200 keeps giving me a code part number and that it needs to go through a drive cycle.
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Friday, August 14th, 2020 AT 2:27 AM
Tiny
ASEMASTER6371
  • MECHANIC
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That is not a reason to replace the ECM.

What is the code that is set?

I attached the procedure for a drive cycle.

Roy

Drive Cycles
Description of OBD II Drive Cycle
The following procedure is designed to execute and complete the OBDII monitors and to clear the Ford P1000, I/M readiness code. To complete a specific monitor for repair verification, follow steps 1 through 4, then continue with the step described by the appropriate monitor found under the "OBDII Monitor Exercised" column. When the ambient air temperature is outside 4.4 to 37.8°C (40 to 100 °F), or the altitude is above 2438 meters (8000 feet), the EVAP monitor will not run. If the P1000 code must be cleared in these conditions, the PCM must detect them once (twice on some applications) before the EVAP monitor can be "bypassed" and the P1000 cleared. The EVAP "bypassing" procedure is described in the following drive cycle.
The OBDII Drive Cycle will be performed using a scan tool. Consult the instruction manual for each described function.
Note:A detailed description of a Powertrain Control Module (PCM) Reset See: Computers and Control Systems > Programming and Relearning > Powertrain Control Module (PCM) Reset is found, refer to the table of contents.
Drive Cycle Recommendations

1. Most OBDII monitors will complete more readily using a "steady foot" driving style during cruise or acceleration modes. Operating the throttle in a "smooth" fashion will minimize the time required for monitor completion.

2. Fuel tank level should be between 1/2 and 3/4 fill with 3/4 fill being the most desirable.

3. The Evaporative Monitor can only operate during the first 30 minutes of engine operation. When executing the procedure for this monitor, stay in part throttle mode and drive in a smooth fashion to minimize "fuel slosh".
WARNING: STRICT OBSERVANCE OF POSTED SPEED LIMITS AND ATTENTION TO DRIVING CONDITIONS ARE MANDATORY WHEN PROCEEDING THROUGH THE FOLLOWING DRIVE CYCLES.
For best result, follow each of the following steps as accurately as possible:
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Friday, August 14th, 2020 AT 6:04 PM
Tiny
CHRIS KINARD
  • MEMBER
  • 80 POSTS
Thank you so much y'all are the best!
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Friday, August 14th, 2020 AT 8:58 PM
Tiny
ASEMASTER6371
  • MECHANIC
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You are welcome.

Always glad to help.

Roy
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Saturday, August 15th, 2020 AT 3:47 AM

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