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DTC U060F-00: Lost Communication with Volume Air Flow Sensor
 
 
 
 
CIRCUIT OPERATION
  • Power is supplied from the ECM connector terminal number 76 to the mass airflow sensor connector terminal number 1.
  • The mass airflow sensor connector terminal number 3 is grounded through the ECM connector terminal number 98.
  • The mass airflow sensor connector terminal number 2 outputs a sensor signal, which is input to the ECM connector terminal number 87.
 
 
DESCRIPTIONS OF MONITOR METHODS
There is an abnormality within the mass airflow sensor, it sends a malfunction signal to the ECM.
 
 
MONITOR EXECUTION
Continuous.
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
  • Not applicable
Sensor (The sensor below is determined to be normal)
  • Not applicable
 
 
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
  • More than 2 seconds have passed since the power supply mode of the electric motor switch was ON.
  • 12V battery positive voltage is more than 10.0 volts and is less than 16.5 volts.
Judgment Criterion
  • SENT communication timeout is detected for 2 seconds.
    or
  • Sent communication data is error for 2 seconds.
 
 
COMMENT
There could be a fault with the harness and connector between the ECM and mass airflow sensor, a fault with the power supply system of the mass airflow sensor, a faulty mass airflow sensor, or a faulty ECM.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Carry out the fuel control by estimating the amount of intake air from throttle opening degree and a normal sensor.
  • Control as if the intake air temperature is 25°C (77°F).
 
 
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function, OBD-II Drive Cycle – Pattern 1 OBD- II DRIVE CYCLE.
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
  • Mass airflow sensor failed.
  • Mass airflow sensor circuit harness damage or connector damage.
  • ECM failed.
 
 
DIAGNOSIS
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
1.STEP 1. Using scan tool (M.U.T.-III SE), check the data list.
Use scan tool (M.U.T.-III SE) to check the data list (Refer to DATA LIST REFERENCE TABLE).
  • Item number 80: Air flow Sensor
Q: Are the check result normal?
 
2.STEP 2. Check harness between mass airflow sensor connector terminal number 1 and ECM connector terminal number 76.
Check power supply line for open/short circuit and damage.
Q: Is the check result normal?
Repair or replace the connector, or repair the damaged harness wire.
 
3.STEP 3. Check harness between mass airflow sensor connector terminal number 3 and ECM connector terminal number 98.
Check ground line for open/short circuit and damage.
Q: Is the check result normal?
Repair or replace the connector, or repair the damaged harness wire.
 
4.STEP 4. Check harness between mass airflow sensor connector terminal number 2 and ECM connector terminal number 87.
Check output line for open/short circuit and damage.
Q: Is the check result normal?
Repair or replace the connector, or repair the damaged harness wire.
 
5.STEP 5. Using scan tool (M.U.T.-III SE), check the data list.
Use scan tool (M.U.T.-III SE) to check the data list (Refer to DATA LIST REFERENCE TABLE).
  • Item number 80: Air flow Sensor
Q: Is the check result normal?
Replace the mass airflow sensor (Refer to ENGINE – Intake and Exhaust, Air Cleaner AIR CLEANER REMOVAL AND INSTALLATION). Then
 
6.STEP 6. Test the OBD-II drive cycle.
After erasing the DTC, carry out test drive with the drive cycle pattern, and recheck the DTC.
(1) Use scan tool (M.U.T.-III SE) to erase the DTC.
(2) Carry out test drive with the drive cycle pattern (Refer to Diagnostic Function, OBD-II Drive Cycle – Pattern 1 OBD- II DRIVE CYCLE).
(3) Use scan tool (M.U.T.-III SE) to recheck the DTC.
Q: Is DTC U060F-00 set?
Replace the ECM (Refer to ENGINE CONTROL MODULE (ECM) REMOVAL AND INSTALLATION).
Intermittent malfunction (Refer to GENERAL INFORMATION, General Information – How to Use Troubleshooting/Inspection Service Points – How to Cope with Intermittent Malfunctions HOW TO COPE WITH INTERMITTENT MALFUNCTIONS).
 
7.STEP 7. Test the OBD-II drive cycle.
After erasing the DTC, carry out test drive with the drive cycle pattern, and recheck the DTC.
(1) Use scan tool (M.U.T.-III SE) to erase the DTC.
(2) Carry out test drive with the drive cycle pattern (Refer to Diagnostic Function, OBD-II Drive Cycle – Pattern 1 OBD- II DRIVE CYCLE).
(3) Use scan tool (M.U.T.-III SE) to recheck the DTC.
Q: Is DTC U060F-00 set?
Replace the ECM (Refer to ENGINE CONTROL MODULE (ECM) REMOVAL AND INSTALLATION).
The inspection is complete.