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DTC P2100: Throttle Actuator Control Motor Circuit (open)
 
 
 
 
CIRCUIT OPERATION
  • Controls the current that is applied from the ECM (terminals ETV+, ETV-) to the throttle actuator control motor terminals.
 
 
TECHNICAL DESCRIPTION
  • ECM varies the direction and the amperage of the current that is applied to the throttle actuator control motor 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 control motor 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 stored 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
  • Battery positive voltage is more than 8.3 volts.
  • The target throttle position sensor (main) voltage subtracted from the throttle position sensor (main) output voltage is more than 0.1 volt.
  • The target throttle position sensor (sub) voltage subtracted from the throttle position sensor (sub) output voltage is more than 0.1 volt.
  • The drive duty of the throttle actuator control motor is more than 100 percent.
  • Except while during cranking.
or
  • Battery positive voltage is more than 8.3 volts.
  • The throttle position sensor (main) output voltage subtracted from the target throttle position sensor (main) voltage is more than 0.1 volt.
  • The throttle position sensor (sub) output voltage subtracted from the target throttle position sensor (sub) voltage is more than 0.1 volt.
  • The drive duty of the throttle actuator control motor is more than 100 percent.
  • 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 less than 0.2 volt.
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 less than 0.2 volt.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Throttle opening degree position is in default position.
 
 
OBD-II DRIVE CYCLE PATTERN
  • None.
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
  • Throttle actuator control motor failed.
  • Open throttle actuator control motor 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
  • 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. Check the throttle actuator control motor.
(1) Disconnect the electronic-controlled throttle valve connector.
(2) Measure the resistance between electronic-controlled throttle valve side connector terminal ETV+ line and ETV- line.
Standard value: 0.3 - 100 Ω [at 20°C (68°C)]
Is the measured resistance between 0.3 and 100 Ω [at 20°C (68°C)?
Go to Step 2.
Replace the throttle body assembly. Then go to Step 6.
 
STEP 2. Check the continuity at ECM harness side connector.
(1) Disconnect the connector and measure at the harness side.
(2) Check for the continuity between terminal RSG line and ground.
  • Continuity (2 ohms or less)
Does continuity exist?
Go to Step 3.
Repair or replace the connector(s), or check and repair the harness of damage in RSG line between ECM connector and ground. Then go to Step 6.
 
STEP 3. Check of open circuit and harness damage in ETV+ line between electronic-controlled throttle valve connector and ECM connector.
Is the harness wire in good condition?
Go to Step 4.
Repair the connector(s) or wiring harness. Then go to Step 6.
 
STEP 4. Check of open circuit and harness damage in ETV- line between electronic-controlled throttle valve connector and ECM connector.
Is the harness wire in good condition?
Go to Step 5.
Repair the connector(s) or wiring harness. Then go to Step 6.
 
STEP 5. 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) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is DTC P2100 set?
Replace the ECM (Refer to, Removal and Installation ). Then go to Step 6.
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 6. 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) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is DTC P2100 set?
Retry the troubleshooting.
The inspection is complete.