Status For Diagnostic Trouble Codes (DTCs)

Overview

Status for diagnostic trouble codes (DTCs)
When one or more faults occur in the component signals used by the engine control module (ECM), the control module sometimes encounters problems distinguishing the root cause of the fault. This is because certain diagnostic functions cannot be run due to physical factors. In addition there are internal causes for other diagnostic trouble codes (DTCs). Therefore, it is now possible to read the diagnostic trouble codes (DTCs) before they have been finally validated, in a prioritized order as follows.

Hint: Depending on the status and the internal connections between the diagnostic functions, the engine control module (ECM) can check the validation (differentiate between a root cause and a secondary cause) if the car is driven again. (The majority of diagnostic functions can be checked by switching the ignition on and off 2-3 times) This gives the control module time to compare all the diagnostic functions. It is possible to read the conditions for each diagnostic trouble code (DTC) and diagnostic functions in the section.

Note! Carry out fault-tracing first on the diagnostic trouble codes (DTCs) that correspond to the symptom.

Stored
(Stored)
The engine control module (ECM) has validated this as a root cause. Fault-tracing can be carried out.

NYS-VRC
(Not Yet Stored-Validated to Root Cause)
(Not Yet Stored-Validated to Root Cause)
This status may change to Stored after the next operating cycle (waits for other diagnostic trouble code(s) (DTC)).
Fault-tracing can be carried out when difficulties are experienced when dealing with this diagnostic trouble code (DTC).

NYS-NV
(Not Yet Stored-Not Validated)
(Not Yet Stored-Not Validated)
This status can change to Stored after the next operating cycle (the ignition or engine is switched off-> on).
Fault-tracing can be carried out when difficulties are experienced when dealing with this diagnostic trouble code (DTC).

Temporary
(Temporary)
Indicates if there is a fault, only in this duty cycle. (If the fault disappears, the status changes to Erased).
Carry out fault-tracing if no other diagnostic trouble codes (DTCs) correspond to the fault symptom.

Stored-VNR
(Stored-Validated to Not Root cause)
(Stored-Validated to Not Root Cause)
Fault-tracing must not be carried out.

NYS-VNR
(Not Yet Stored-Validated to Not Root cause)
(Not Yet Stored-Validated to Not Root Cause)
Fault-tracing must not be carried out.

Hint: "Not validated" indicates that the diagnostic function for the diagnostic trouble code (DTC) has still not been completed.

Erased
(Erased)
Only fault traced in cases when there is a connection to a symptom reported by the customer and no other diagnostic trouble codes (DTCs) are stored.

Note! Erased status is indicated when a fault occurs in every other operating cycle.