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  • P1696 PCM Failure EEPROM Write Denied

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    DTC P1696: PCM FAILURE EEPROM WRITE DENIED

    Monitor & Set Conditions

    Powertrain Control Module (PCM) EEPROM is monitored continuously when ignition is on. DTC may be stored if attempt to program or write to the internal EEPROM failed. Also checks at powerdown.

    Possible Causes

    • DRBIII(R) Displays Write Failure
    • DRBIII(R) Displays Write Refused 2nd Time
    • DRBIII(R) Displays SRI Mileage Invalid
    • Compare SRI Mileage With Odometer

    Testing

    1. Turn ignition on with engine off. Using DRBIII(R) scan tool, perform SRI MEMORY TEST. If scan tool does not display WRITE FAILURE, go to next step. If scan tool displays WRITE FAILURE, replace and program PCM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article.

    2. Ensure ignition is on and engine is off. Using scan tool, perform SRI MEMORY TEST again. If scan tool displays WRITE REFUSED, go to next step. If scan tool does not display WRITE REFUSED, go to step 4 .

    3. Ensure ignition is on and engine is off. Using scan tool, perform SRI MEMORY TEST again. If scan tool displays WRITE REFUSED, replace and program PCM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article. If scan tool does not display WRITE REFUSED, test is complete.

    4. Ensure ignition is on and engine is off. Using scan tool, perform SRI MEMORY TEST again. If scan tool displays SRI MILEAGE INVALID, update the mileage and retest SRI MEMORY. If scan tool does not display SRI MILEAGE INVALID, go to next step.

    5. Compare SRI mileage stored with instrument panel odometer. If mileage is within range specified on scan tool, test is complete. If mileage is not within range specified on scan tool, update the mileage and retest SRI MEMORY.


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