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DTC P1623
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Code word or key ID number read/write error in PCM
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DETECTION CONDITION |
• PCM internal EEPROM damaged.
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POSSIBLE CAUSE |
• PCM internal EEPROM damaged.
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Diagnostic procedure
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STEP
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INSPECTION
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ACTION
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1
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any related Service Information available?
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Yes
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Perform repair or diagnosis according to available Service Information.
• If vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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2
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VERIFY DTC P1623 DETECTED AGAIN
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Turn the ignition switch off, then start engine.
• Is the same DTC present?
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Yes
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Replace the PCM, then go to the next step.
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No
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Go to the next step.
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3
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VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
(See AFTER REPAIR PROCEDURE [AJ].)
• Is there any DTC present?
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Yes
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Go to the applicable DTC inspection.
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No
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Troubleshooting completed.
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