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Home >> Mitsubishi >> 2021 >> Mirage ES, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Continuously Variable Transaxle (CVT)) >> Diagnosis >> Diagnostic Trouble Code Procedures >> DTC P1637: Malfunction of Memory Backup >> Descriptions Of Monitor Methods
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Descriptions Of Monitor Methods

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When the ignition switch is turned to the "ON" position, TCM determines that the writing to the EEPROM area had failed last time the ignition switch was turned to the "LOCK" (OFF) position.