Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.

DIAGNOSIS PROCEDURE

Step	Action	YES	NO
1	PERFORM IDLE AIR VOLUME LEARNING Perform "Idle Air Volume Learning" in [PROCEDURE AFTER REPLACING ECM ]. Is Idle Air Volume Learning carried out successfully? Yes or No	GO TO 2.	Follow the instruction of Idle Air Volume Learning.
2	CHECK Intake system Check for the cause of intake air volume lacking. Refer to the following. Crushed intake air passage Intake air passage clogging OK or NG	GO TO 3.	Repair or replace malfunctioning part
3	CHECK FUEL INJECTION SYSTEM FUNCTION Perform [P0171, P0174 FUEL INJECTION SYSTEM FUNCTION ] in DTC P0171, P0174 FUEL INJECTION SYSTEM FUNCTION. OK or NG	GO TO 4.	Go to [P0171, P0174 FUEL INJECTION SYSTEM FUNCTION ].
4	PERFORM DTC CONFIRMATION PROCEDURE With SDT Turn ignition switch ON. Select "DTC check" mode with SDT. Touch "Clear". Perform DTC Confirmation Procedure. See [P1421 COLD START CONTROL ]. Is the 1st trip DTC P1421 displayed again? With GST Turn ignition switch ON. Select Service $04 with GST. Perform DTC Confirmation Procedure. See [P1421 COLD START CONTROL ]. Is the 1st trip DTC P1421 displayed again? Yes or No	GO TO 5.	INSPECTION END
5	REPLACE ECM Replace ECM. Perform initialization of immobilizer system and registration of all immobilizer system ignition key IDs. Refer to [ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT: SPECIAL REPAIR REQUIREMENT ] Perform "VIN Registration" in [PROCEDURE AFTER REPLACING ECM ]. Perform "Accelerator Pedal Released Position Learning" in [PROCEDURE AFTER REPLACING ECM ]. Perform "Throttle Valve Closed Position Learning" in [PROCEDURE AFTER REPLACING ECM ]. Perform "Idle Air Volume Learning" in [PROCEDURE AFTER REPLACING ECM ].	INSPECTION END