What is DA22KK (Komatsu) Code & How to Solve It?

What is DA22KK (Komatsu):

DA22KK is a Komatsu-specific code indicating a communication failure between the monitor panel and the engine controller.

This typically results in missing or incorrect engine data displayed to the operator.

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Why This Happens

• CAN line interruption between display and engine controller.
• Loose monitor connector or power dropout.
• Engine control unit temporarily unresponsive.
• Display panel firmware issue.

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How to Fix It

1. Check CAN wiring and connectors between the monitor and ECU.
2. Power cycle both monitor and ECM.
3. Update monitor and ECU software if applicable.
4. Replace display panel or ECU if fault is persistent and confirmed.
5. Clear the fault and confirm stable communication.

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How to Avoid It Before It Happens

1. Avoid jump-starting machines without surge protection.
2. Keep wiring tight and protected from dust or vibration.
3. Document display signal loss and investigate recurring alerts.
4. Use Clue’s Preventive Maintenance to regularly inspect the CAN wiring and connectors, ensuring stable communication between the monitor panel and engine controller.