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DTC P2101-00: Throttle Valve Control Servo Magneto Malfunction
 
 
 
 
CIRCUIT OPERATION
  • The throttle actuator is built into the throttle body assembly.
  • The ECM controls the current that is applied from the ECM connector terminal number 17 and number 18 to the throttle actuator terminals (terminal number 1 and number 2) of the throttle valve assembly connector.
 
 
TECHNICAL DESCRIPTION
ECM check whether the throttle actuator magneto has failed.
 
 
DESCRIPTIONS OF MONITOR METHODS
Throttle actuator 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
  • 12V battery positive voltage is higher than 8.3 volts.
Judgment Criterion
  • The coil current of the throttle actuator is higher than 8 ampere 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 OBD- II DRIVE CYCLE.
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
  • Throttle actuator (built into the throttle body assembly) failed.
  • Shorted throttle actuator circuit 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. Check throttle actuator itself.
Check throttle actuator itself (Refer to THROTTLE ACTUATOR CONTROL MOTOR CHECK ).
Q: Is the check result normal?
Replace the throttle body assembly (with built-in throttle actuator) (Refer to THROTTLE BODY ASSEMBLY ).
 
2.STEP 1. Check of short circuit and damage in wiring harness between throttle body assembly connector terminal number 1 and ECM connector terminal number 17.
Q: Is the check result normal?
Repair or replace the connector, or repair the damaged harness wire.
 
3.STEP 3. Check of short circuit and damage in wiring harness between throttle body assembly connector terminal number 2 and ECM connector terminal number 18.
Q: Is the check result normal?
Repair or replace the connector, or repair the damaged harness wire.
 
4.STEP 4. 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 P2101-00 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).