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Component Inspection

Inspection Condition	Inspection Procedure	Reference
Ignition "ON".	Ignition "OFF". Ignition "ON". Connect KDS to "Data Link Connector (DLC)". Monitor "Diagnostic Trouble Codes (DTC)" with KDS. Clear any DTCs stored in the system with KDS. Drive the vehicle or system according to the diagnostic conditions of the fault finding conditions. Re-check DTC in the system with KDS. Did the same DTC is stored in the system?	-

Good

Fault might be intermittent and caused either by poor contact in connectors or wiring harness, or it has been repaired and control module memory is not cleared yet. Thoroughly check terminal of auxiliary battery, all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
Repair or replace as necessary and then go to "Verification of Repair " procedure.

No Good

Carefully re-do this troubleshooting guide steps.
If problem still occurs, replace MCU and then go to "Verification of Repair " procedure.