Diagnostic Procedure

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DIAGNOSTIC PROCEDURE

Step	Action	YES	NO
1	CONFIRM THE SYMPTOM Check if vehicle creeps forward in "D" position and vehicle can be started from D₁ . OK or NG	GO TO 2.	Refer to [VEHICLE DOES NOT CREEP FORWARD IN "D" POSITION ], [VEHICLE CANNOT BE STARTED FROM D1 ].
2	PERFORM DTC CHECK Perform "DTC check". Refer to [SDT FUNCTION (AT) ]. Is any malfunction detected by "DTC check"?	Check the malfunctioning system. Refer to [SDT FUNCTION (AT) ].	GO TO 3.
3	CHECK A/T FLUID LEVEL Check A/T fluid level. Refer to [CHECKING THE A/T FLUID (ATF) ]. OK or NG	GO TO 4.	Refill ATF.
4	CHECK LINE PRESSURE Check line pressure at the engine stall point. Refer to [LINE PRESSURE TEST ]. OK or NG	GO TO 7.	Line pressure high. GO TO 5.
5	DETECT MALFUNCTIONING ITEM Check control valve with TCM. Refer to [CONTROL VALVE WITH TCM AND A/T FLUID TEMPERATURE SENSOR 2: ON-VEHICLE REPAIR ]. Disassemble A/T. Refer to [TRANSMISSION ASSEMBLY DISASSEMBLY ]. Check the following. Oil pump assembly. Refer to [OIL PUMP: DISASSEMBLY AND ASSEMBLY ]. OK or NG	GO TO 7.	Repair or replace damaged parts.
6	DETECT MALFUNCTIONING ITEM Check control valve with TCM. Refer to [CONTROL VALVE WITH TCM AND A/T FLUID TEMPERATURE SENSOR 2: ON-VEHICLE REPAIR ]. Disassemble A/T. Refer to [TRANSMISSION ASSEMBLY DISASSEMBLY ]. Check the following. Oil pump assembly. Refer to [OIL PUMP: DISASSEMBLY AND ASSEMBLY ]. Power train system. Refer to [TRANSMISSION ASSEMBLY DISASSEMBLY ]. Transmission case. Refer to [TRANSMISSION ASSEMBLY DISASSEMBLY ]. OK or NG	GO TO 7.	Repair or replace damaged parts.
7	CHECK A/T FLUID CONDITION Remove oil pan. Refer to [OIL PAN: REMOVAL AND INSTALLATION ]. Check A/T fluid condition. Refer to [CHECKING THE A/T FLUID (ATF) ]. OK or NG	GO TO 8.	GO TO 11.
8	DETECT MALFUNCTIONING ITEM Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to [SYMPTOM CHART ] (Symptom No. 11). OK or NG	GO TO 9.	Repair or replace damaged parts.
9	CHECK SYMPTOM Check again. Refer to [ROAD TEST ], [ROAD TEST ]. OK or NG	INSPECTION END	GO TO 10.
10	PERFORM TCM INSPECTION Perform TCM input/output signals inspection. Refer to [TCM TERMINALS AND REFERENCE VALUES ]. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness connector. OK or NG	INSPECTION END	Repair or replace damaged parts.
11	DETECT MALFUNCTIONING ITEM Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to [SYMPTOM CHART ] (Symptom No. 11). OK or NG	GO TO 9.	Repair or replace damaged parts.