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EC-44 < FUNCTION DIAGNOSIS > [VK56DE] ON BOARD DIAGNOSTIC (OBD) SYSTEM *: If completion of several SRTs is required, perform driving patterns (DTC confirmation procedure), one by one based on the priority for SRT Set Timing SRT is set as “CMPLT” after self-diagnosis has been performed one or more times. Completion of SRT is done regardless of whether the result is OK or NG. The set timing is different between OK and NG results and is shown in the table below. OK: Self-diagnosis is carried out and the result is OK. When all SRT related self-diagnoses showed OK results in a single cycle (Ignition OFF-ON-OFF), the SRT will indicate “CMPLT”. → Case 1 above When all SRT related self-diagnoses showed OK results through several different cycles, the SRT will indicate “CMPLT” at the time the respective self-diagnoses have at least one OK result. → Case 2 above If one or more SRT related self-diagnoses showed NG results in 2 consecutive cycles, the SRT will also indi- cate “CMPLT”. → Case 3 above The table above shows that the minimum number of cycles for setting SRT as “INCMP” is one (1) for each self-diagnosis (Case 1 & 2) or two (2) for one of self-diagnoses (Case 3). However, in preparation for the state emissions inspection, it is unnecessary for each self-diagnosis to be executed twice (Case 3) for the following reasons: • The SRT will indicate “CMPLT” at the time the respective self-diagnoses have one (1) OK result. • The emissions inspection requires “CMPLT” of the SRT only with OK self-diagnosis results. • When, during SRT driving pattern, 1st trip DTC (NG) is detected prior to “CMPLT” of SRT, the self-diagnosis memory must be erased from ECM after repair. EVAP SYSTEM 2 EVAP control system purge flow monitoring P0441 1 EVAP control system P0442 2 EVAP control system P0456 HO2S 2 Air fuel ratio (A/F) sensor 1 P0133, P0153 Heated oxygen sensor 2 P0137, P0157 Heated oxygen sensor 2 P0138, P0158 Heated oxygen sensor 2 P0139, P0159 SRT item (CONSULT-III indication) Performance Priority* Required self-diagnostic items to set the SRT to “CMPLT” Corresponding DTC No. Self-diagnosis result Example Diagnosis Ignition cycle ← ON → OFF ← ON → OFF ← ON → OFF ← ON → All OK Case 1 P0400 OK (1) — (1) OK (2) — (2) P0402 OK (1) — (1) — (1) OK (2) P1402 OK (1) OK (2) — (2) — (2) SRT of EGR “CMPLT” “CMPLT” “CMPLT” “CMPLT” Case 2 P0400 OK (1) — (1) — (1) — (1) P0402 — (0) — (0) OK (1) — (1) P1402 OK (1) OK (2) — (2) — (2) SRT of EGR “INCMP” “INCMP” “CMPLT” “CMPLT” NG exists Case 3 P0400 OK OK — — P0402 — — — — P1402 NG — NG NG (Consecutive NG) (1st trip) DTC 1st trip DTC — 1st trip DTC DTC (= MIL ON) SRT of EGR “INCMP” “INCMP” “INCMP” “CMPLT” |