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DTC P2101: Throttle Actuator Control Motor Magneto Malfunction
 
 
 
 
CIRCUIT OPERATION
Controls the current that is applied from ECM terminals ETV+, ETV- to the throttle actuator control motor
 
 
TECHNICAL DESCRIPTION
ECM check whether the throttle actuator control motor magneto has failed.
 
 
DESCRIPTIONS OF MONITOR METHODS
Throttle actuator control motor intelligent power device detects shorted-high/low and overheat of itself.
 
 
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
Check Condition
  • Battery positive voltage is higher than 8.3 volts.
Judgment Criterion
  • The coil current of the throttle actuator control motor is more than 8 amperes for 0.3 second.
 
 
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 1 .
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are: )
  • Throttle actuator control motor failed.
  • Shorted throttle actuator control motor circuit, harness damage or connector damage.
  • ECM failed.
 
 
DIAGNOSIS
STEP 1. Check the throttle actuator control motor resistance.
Refer to Throttle Actuator Control Motor Check .
Is the measured resistance between 0.3 and 100 ohms [at 20°C (68°F)]?
Go to Step 2.
Replace the throttle body assembly. Then go to Step 5.
 
STEP 2. Check of short circuit to ground and harness damage in ETV+ line between throttle body assembly connector and ECM connector.
Is the harness wire in good condition?
Go to Step 3.
Repair it. Then go to Step 5.
 
STEP 3. Check of short circuit to ground and harness damage in ETV- line between throttle body assembly connector and ECM connector.
Is the harness wire in good condition?
Go to Step 4.
Repair it. Then go to Step 5.
 
STEP 4. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P2101 set?
Replace the ECM (Refer to Removal and Installation ). Then go to Step 5.
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 5. 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 1 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P2101 set?
Retry the troubleshooting.
The inspection is complete.