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SEF833UA SEF409WA SEF985Z SEF395W DIAGNOSTIC PROCEDURE INSPECTION START Loosen and retighten heated oxygen sen- sors 1 (front). Tightening torque: 40 - 50 N ⋅ m (4.1 - 5.1 kg-m, 30 - 37 ft-lb) CLEAR THE SELF-LEARNING DATA 1. Start engine and warm it up to normal operating temperature. 2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-II. 3. Clear the self-learning control coefficient by touching “CLEAR”. 4. Run engine for at least 10 min- utes at idle speed. Are the 1st trip DTCs P0171, P0174 detected? Is it difficult to start engine? -------------------------------------------------------------------------------------------------------------------------------------- OR -------------------------------------------------------------------------------------------------------------------------------------- 2. Turn ignition switch “OFF”. 3. Disconnect mass air flow sensor harness connector, and restart and run engine for at least 3 seconds at idle speed. 4. Stop engine and reconnect mass air flow sensor harness connector. 5. Make sure diagnostic trouble code No. 0102 is displayed in Diagnostic Test Mode II. 6. Erase the diagnostic test mode II (Self-diagnostic results) memory. Make sure diagnostic trouble code No. 0505 is dis- played in Diagnostic Test Mode II. 7. Run engine for at least 10 min- utes at idle speed. Are the 1st trip DTCs 0115, 0210 detected? Is it difficult to start engine? No E Yes Go to “TROUBLE DIAG- NOSIS FOR DTC P0171, P0174”, EC-245. CHECK COMPONENT [Heated oxygen sensor 1 heaters (front)]. Refer to “COMPONENT INSPECTION” on next page. OK E NG REPLACE HO2S1 (front). 1. Check HO2S1 (front) harness protector color. Black: Left bank (B1) Blue: Right bank (B2) 2. Replace malfunctioning HO2S1 (front) CHECK COMPONENT [Heated oxygen sensors 1 (front)]. Refer to “COMPONENT INSPECTION” on next page. OK E NG Replace corresponding heated oxygen sensor 1 (front). Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117. Refer to “TROUBLE DIAGNOSIS FOR DTC P0130 (B1), P0150 (B2)” for circuit, INSPECTION END GI MA EM LC FE AT PD FA RA BR ST RS BT HA EL IDX TROUBLE DIAGNOSIS FOR DTC P0131 (B1), P0151 (B2) Heated Oxygen Sensor 1 (Front) (P0131: Bank H H H H H H EC-177 |