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[Solved] Mazda MPV 2003 2.0L: PCM RF5G Replacement & DTC P1603 Error Code - Need Help!

Lang_yyyy 3333 10
Best answers LABEL_AI_GENERATED

How can I fix DTC P1603 after replacing the PCM on a 2003 Mazda MPV 2.0L RF5G?

You need to match the immobilizer data/password between the old EEPROM, the new PCM EEPROM, and the HC05B32 immobilizer box; writing the provided bin with the same password and keeping the immo box connected fixed it [#17303734] [#17304311] [#17304322] After the new bin was written, the DTCs changed to P1621 and P1624 until the correct password/bin was used [#17304288] [#17304322] Once that was done, the PCM worked perfectly [#17304347]
AI summary based on the discussion. May contain errors.
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  • #1 17303322
    Lang_yyyy
    Level 8  
    Posts: 19
    Rate: 5
    Hi guys, I need help. I change pcm on Mazda 2.0 2003. Now I have an dtc P1603.
    Pcm : RF5G

    Dump in attachment. Thanks!
    Attachments:
    • oldeprommpv.rar (233 Bytes) You must be logged in to download this attachment.
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  • Helpful post
    #2 17303734
    seat21
    Level 29  
    Posts: 901
    Help: 151
    Rate: 399
    old eprom and new eprom attachment and hc05b32 immo box
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  • #3 17303953
    Lang_yyyy
    Level 8  
    Posts: 19
    Rate: 5
    See in attachment...

    NEWEEPROM dump from new PCM

    OLDEEPROM dump from old PCM

    IMMOBOX dump from immo box

    Thank you!
    Attachments:
    • IMMOBOX.rar (166 Bytes) You must be logged in to download this attachment.
    • OLDEEPROM.rar (233 Bytes) You must be logged in to download this attachment.
    • NEWEEPROM.rar (192 Bytes) You must be logged in to download this attachment.
  • #4 17304191
    seat21
    Level 29  
    Posts: 901
    Help: 151
    Rate: 399
    Tray this bin
  • #5 17304257
    seat21
    Level 29  
    Posts: 901
    Help: 151
    Rate: 399
    jeszcze raz
    Attachments:
    • NOWY TEST.rar (213 Bytes) You must be logged in to download this attachment.
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  • #6 17304288
    Lang_yyyy
    Level 8  
    Posts: 19
    Rate: 5
    I wrote this bin to PCM and now I have DTCs P1621 and P1624
  • #7 17304311
    seat21
    Level 29  
    Posts: 901
    Help: 151
    Rate: 399
    immo box conected
  • #8 17304314
    Lang_yyyy
    Level 8  
    Posts: 19
    Rate: 5
    seat21 wrote:
    immo box connected


    It is!
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  • #9 17304322
    seat21
    Level 29  
    Posts: 901
    Help: 151
    Rate: 399
    tray this the same password
    Attachments:
    • TEST2.rar (209 Bytes) You must be logged in to download this attachment.
  • #10 17304347
    Lang_yyyy
    Level 8  
    Posts: 19
    Rate: 5
    Love you man! It's working perfectly! Thank you a lot!
  • #11 17304349
    Lang_yyyy
    Level 8  
    Posts: 19
    Rate: 5
    Love you man! It's working perfectly! Thank you a lot!

    Dodano po 1 [minuty]:

    Special Thanks to seat21
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Topic summary

LABEL_AI_GENERATED
The discussion revolves around the replacement of the PCM (Powertrain Control Module) in a 2003 Mazda MPV with a 2.0L engine, specifically using the RF5G model. After the PCM replacement, the user encountered a DTC (Diagnostic Trouble Code) P1603. Various users provided assistance by sharing EEPROM dumps from both the old and new PCM, as well as from the immo box. The user initially faced additional DTCs P1621 and P1624 after attempting a new bin file but eventually resolved the issue with a suggested bin file, leading to successful operation of the vehicle. Special thanks were given to a user named seat21 for their help.
AI summary based on the discussion. May contain errors.
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