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EC-152 < COMPONENT DIAGNOSIS > [VK56DE] P0133, P0153 A/F SENSOR 1 2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-III. 3. Clear the self-learning control coefficient by touching “CLEAR” or “START”. 4. Run engine for at least 10 minutes at idle speed. Is the 1st trip DTC P0171, P172, P0174 or P0175 detected? Is it difficult to start engine? Without CONSULT-III 1. Start engine and warm it up to normal operating temperature. 2. Turn ignition switch OFF. 3. Disconnect mass air flow sensor harness connector. 4. Restart engine and let it idle for at least 5 seconds. 5. Stop engine and reconnect mass air flow sensor harness con- nector. 6. Make sure DTC P0102 is displayed. 7. Erase the DTC memory. Refer to 8. Make sure DTC P0000 is displayed. 9. Run engine for at least 10 minutes at idle speed. Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected? Is it difficult to start engine? Yes or No Yes >> Perform trouble diagnosis for DTC P0171, P0174 or P0172, P0175. Refer to No >> GO TO 6. 6. CHECK A/F SENSOR 1 POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect A/F sensor 1 harness connector. 3. Turn ignition switch ON. 4. Check voltage between A/F sensor 1 terminal 4 and ground with CONSULT-III or tester. OK or NG OK >> GO TO 8. NG >> GO TO 7. 7. DETECT MALFUNCTIONING PART Check the following. • Harness connectors E5, F14 • IPDM E/R harness connector E119 • 15A fuse (No. 54) • Harness for open or short between A/F sensor 1 and fuse >> Repair or replace harness or connectors. 8. CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT BBIA0368E Voltage: Battery voltage BBIA0376E PBIB3308E |