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DTC P061A: Internal Control Module Torque Performance Problem
 
 
 
 
TECHNICAL DESCRIPTION
Compares the actual torque signal computed from a mass volume air flow sensor signal with the driver demand torque signal computed from an accelerator pedal position sensor signal.
 
 
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
  • Engine speed is 500 r/min or higher.
  • Volumetric efficiency is 16 percent or higher.
Judgment Criterion
  • For 5 second, the difference between the actual torque signal and the requested torque signal is 63 N·m (46 ft-lb) or more.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Throttle opening degree position is in default position.
 
 
OBD-II DRIVE CYCLE PATTERN
  • Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 17 .
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
  • Throttle actuator control motor failed.
  • Connector damage.
  • Harness damage.
  • Vacuum leak.
  • There is some foreign matter around mass airflow sensor.
  • 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
  • MB991958: Scan Tool (M.U.T.-III Sub Assembly)
    • MB991824: Vehicles Communication Interface (V.C.I.)
    • MB991827: M.U.T.-III USB Cable
    • MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
STEP 1. Using scan tool (M.U.T.-III), read the diagnostic trouble code (DTC).
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
(1) Connect scan tool (M.U.T-III). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III) .
(2) Turn the ignition switch to the "ON" position.
(3) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the diagnostic trouble code other than P061A set?
Refer to, Diagnostic Trouble Code Chart .
Go to Step 2.
 
STEP 2. Check for intake system vacuum leak.
Are there any abnormalities?
Repair it. Then go to Step 11.
Go to Step 3.
 
STEP 3. Check for foreign matter being around the mass airflow sensor.
Are there any foreign matter?
Repair it. Then go to Step 11.
Go to Step 4.
 
STEP 4. Using scan tool (M.U.T.-III), check data list item 10: Mass Airflow Sensor.
(1) Start the engine and run at idle.
(2) Set scan tool (M.U.T-III) to the data reading mode for item 10, Mass Airflow Sensor.
(3) Warm up the engine to normal operating temperature: 80°C to 95°C (176°F to 203°F).
  • The standard value during idling should be between 1,350 and 1,670 millivolts.
  • When the engine is revved, the output voltage should increase according to the increase in engine speed.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the sensor operating properly?
Go to Step 5.
Refer to, DTC P0102 - Mass Airflow Circuit Low Input , DTC P0103 - Mass Airflow Circuit High Input .
 
STEP 5. Using scan tool (M.U.T.-III), check data list item 11: Accelerator Pedal Position Sensor (main).
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool (M.U.T-III) to the data reading mode for item 11, Accelerator Pedal Position Sensor (main).
  • Output voltage should be between 900 and 1,100 millivolts when foot is released from accelerator pedal.
  • Output voltage should be 4,000 millivolts or more when accelerator pedal is fully depressed.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Is the sensor operating properly?
Go to Step 6.
Refer to, DTC P2122 - Accelerator Pedal Position Sensor (main) Circuit Low Input , DTC P2123 - Accelerator Pedal Position Sensor (main) Circuit High Input .
 
STEP 6. Using scan tool (M.U.T.-III), check data list item 12: Accelerator Pedal Position Sensor (sub).
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool (M.U.T-III) to the data reading mode for item 12, Accelerator Pedal Position Sensor (sub).
  • Output voltage should be between 400 and 600 millivolts when foot is released from accelerator pedal.
  • Output voltage should be 2,000 millivolts or more when accelerator pedal is fully depressed.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Is the sensor operating properly?
Go to Step 7.
Refer to, DTC P2127 - Accelerator Pedal Position Sensor (sub) Circuit Low Input , DTC P2128 - Accelerator Pedal Position Sensor (sub) Circuit High Input .
 
STEP 7. Check the throttle actuator control motor.
(1) Disconnect the throttle body assembly connector.
(2) Measure the resistance between throttle body assembly side connector terminal ETV+ line and ETV- line.
Standard value: 0.3 - 100 ohms [at 20°C (68°C)]
Is the measured resistance between 0.3 and 100 Ω [at 20°C (68°C)?
Go to Step 8.
Replace the throttle body assembly. Then go Step 11.
 
STEP 8. Check of harness damage in ETV+ line between throttle body assembly connector and ECM connector.
Is the harness wire in good condition?
Go to Step 9.
Repair the connector(s) or wiring harness. Then go to Step 11.
 
STEP 9. Check of harness damage in ETV- line between throttle body assembly connector and ECM connector.
Is the harness wire in good condition?
Go to Step 10.
Repair it. Then go to Step 11.
 
STEP 10. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 17 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P061A set?
Replace the ECM (Refer to, Removal and Installation ). Then go to Step 11.
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
 
STEP 11. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 17 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P061A set?
Retry the troubleshooting.
The inspection is complete.