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MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L> 13B-105 STEP 10. Using scan tool MB991502, check data list item CAUTION To prevent damage to scan tool MB991502, always turn the 14, Throttle Position Sensor. • With the throttle valve in the idle position, voltage should • With the throttle valve in the full-open position, voltage (4) Turn the ignition switch to the "LOCK"(OFF) position. Q: Is the sensor operating properly? YES : It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/ ). NO : Replace the PCM. Then go to Step 11. STEP 11. Test the OBD-II drive cycle. , Procedure 6 − Other Monitor. (2) Check the diagnostic trouble code (DTC). Q: Is the DTC P0123 is output? YES : Retry the troubleshooting. DTC P0128: Coolant Thermostat Malfunction TECHNICAL DESCRIPTION • The PCM checks the time for the engine coolant DTC SET CONDITIONS Check Area • Engine coolant temperature is between -10 ° C (14 ° F) and 82 ° C (180 ° F) when the engine is started. • The engine coolant temperature − intake air temperature is 5 ° C (48 ° F) or less when the engine is started. • The intake air temperature when the engine is − intake air temperature is 2 ° C (36 ° F) or less. • The volume air flow sensors output frequency is Judgment Criteria • The time for the engine coolant temperature to ° C (180 ° F) takes longer than the specified time *. engine coolant temperature at start is 20 ° C (68 ° F) or more. Approximately 20 to 54 minutes when the engine coolant temperature at start is 20 ° C (68 ° F) or less. • Only one monitor during one drive cycle. TROUBLESHOOTING HINTS (The most likely • The thermostat is faulty • PCM failed. AC003081 AB 16 PIN MB991502 |