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MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L> 13B-409 STEP 4. Using scan tool MB991502, check data list. Reference Table( ). a. Item 21: Engine Coolant Temperature Sensor. (3) Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the sensor operating properly? YES : Go to Step 5. symptom is eliminated. STEP 5. Check the engine start-ability. Q: Is the start ability good? YES : Go to Step 6. STEP 6. Check the idle air control (IAC) motor operation ° C (68 ° F) or below. NOTE: If necessary, you can disconnect the engine coolant ° C(68 ° F) or below. (2) Check that the operation sound of the IAC motor can be heard after the ignition is switched to the "ON" position (but • An operation sound is heard. Q: Did you hear the operation sound? YES : Refer to, Clean the throttle valve area( NO : Refer to DTC P0506 Idle Control System RPM Lower Than Expected( ), DTC P0507 Idle Control System RPM Higher Than Expected( STEP 7. Check the ignition timing. Standard value: 5 °°°° BTDC ±±±± 3 °°°° Q: Is the ignition timing normal? YES : Go to Step 8. belt cover are in the correct position. Then confirm AC003081 AB 16 PIN MB991502 ACX02523AG IDLE AIR |