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DTC P2100-00: Throttle Valve Control Servo Circuit (open)
 
 
 
 
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 varies the direction and the amperage of the current that is applied to the throttle actuator in order to control the opening of the throttle valve.
 
 
DESCRIPTIONS OF MONITOR METHODS
The voltage difference between the throttle position sensor output voltage and the throttle position sensor output at the throttle actuator relay off is smaller than the specified value.
 
 
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 Conditions
  • 12V battery positive voltage is higher than 8.3 volts.
  • The target throttle position sensor (main) voltage subtracted from the throttle position sensor (main) output voltage is higher than 0.1 volt.
  • The target throttle position sensor (sub) voltage subtracted from the throttle position sensor (sub) output voltage is higher than 0.1 volt.
  • The drive duty of the throttle actuator is 100 percent or more.
  • Except while during cranking.
    or
  • 12V battery positive voltage is higher than 8.3 volts.
  • The throttle position sensor (main) output voltage subtracted from the target throttle position sensor (main) voltage is higher than 0.1 volt.
  • The throttle position sensor (sub) output voltage subtracted from the target throttle position sensor (sub) voltage is higher than 0.1 volt.
  • The drive duty of the throttle actuator is 100 percent or more.
  • Except while during cranking.
Judgment Criterion
  • For 0.4 second, the difference between the output voltage of throttle position sensor (main) and the learning value of the middle-opened degree is 0.2 volt or lower.
    or
  • For 0.4 second, the difference between the output voltage of throttle position sensor (sub) and the learning value of the middle-opened degree is 0.2 volt or lower.
 
 
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.
  • Open throttle actuator 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. 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 2. Resistance measurement at ECM connector terminal number 61 and terminal number 69.
(1) Disconnect connector, and measure at harness side.
(2) Repair the ground line between the ECM connector terminal number 61 and ground, and between the ECM connector terminal number 69 and ground.
OK: Continuity (2 ohms or less)
Q: Is the check result normal?
Repair the ground line between the ECM connector terminal number 61 and ground, and between the ECM connector terminal number 69.
 
3.STEP 3. Check of open 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.
 
4.STEP 4. Check of open 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.
 
5.STEP 5. 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 P2100-00 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).