This instruction show you details information about DTC type definitions:type A,B,C and D for ISUZU truck.
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DTC Type Definitions
There are 4 DTC types: Type A, B, C, and D. Among these DTCs, type A and B DTCs are related to emission whereas type C and D DTCs are related to items other than emission.
Action taken when DTC sets – Type A
The ECM illuminates the malfunction indicator light (MIL) when the diagnostic runs and fails.
The ECM records the operating conditions when the diagnostic runs and fails. The ECM stores this information in the Freeze Frame/Failure Records.
Action taken when DTC sets – Type B
The ECM illuminates the MIL after 2 consecutive driving cycles when the diagnostic runs and fails.
The ECM records the operating conditions when the diagnostic runs and fails. The first time the diagnostic runs and fails, the ECM stores this information in the Failure Records. If the diagnostic reports a failure in 2 consecutive driving cycles, the ECM records the operating conditions at the time of failure, stores this information in the Freeze Frame, and updates the Failure Records.
Condition for clearing the MIL/DTC – Type A or Type B
The ECM turns OFF the MIL after 3 consecutive driving cycles when the diagnostic runs and does not fail.
A current DTC is cleared when the diagnostic runs and passes.
The DTC history is cleared after 40 consecutive warm-up cycles if no failures are reported.
Clear the MIL and the DTC with a scan tool.
Action taken when DTC sets – Type C
The ECM illuminates the service vehicle soon (SVS) indicator light when the diagnostic runs and fails.
The ECM records the operating conditions when the diagnostic runs and fails. The ECM stores this information in the Failure Records.
Condition for clearing the SVS indicator light/DTC – Type C
The ECM turns OFF the SVS indicator light after 1 driving cycle when the diagnostic runs and does not fail.
A current DTC is cleared when the diagnostic runs and passes.
The DTC history is cleared after 40 consecutive warm-up cycles if no failures are reported.
Clear the SVS indicator light and the DTC with a scan tool.
Action taken when DTC sets – Type D
The ECM does not illuminate the MIL or SVS indicator light.
The ECM records the operating conditions when the diagnostic runs and fails. The ECM stores this information in the Failure Records.
Condition for clearing the DTC – Type D
A current DTC is cleared when the diagnostic runs and passes.
The DTC history is cleared after 40 consecutive warm-up cycles if no failures are reported.
Clear the DTC with a scan tool.
More information for ISUZU Repair,please refer to ISUZU Truck Repair
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