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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.
 
 
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 higher than 8.3 volts.
  • The output voltage of the throttle position sensor (main) minus the proposed output voltage becomes 0.1 volt or more.
  • The output voltage of the throttle position sensor (sub) minus the proposed output voltage becomes 0.1 volt or more.
  • The drive duty of the throttle actuator control motor is 100 percent or more.
or
  • Battery positive voltage is higher than 8.3 volts.
  • The proposed output voltage minus the output voltage of the throttle position sensor (main) becomes 0.1 volt or more.
  • The proposed output voltage minus the output voltage of the throttle position sensor (sub) becomes 0.1 volt or more.
  • The drive duty of the throttle actuator control motor is 100 percent or more.
Judgment Criterion
  • The output voltage of the throttle position sensor (main) minus the learning value of the middle -opened degree becomes 0.2 volt or less for 0.4 second.
or
  • The output voltage of the throttle position sensor (sub) minus the learning value of the middle -opened degree becomes 0.2 volt or less for 0.4 second.
 
 
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 stored 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 throttle body assembly connector and measure at throttle body assembly side.
(2) Measure the resistance between throttle actuator control motor side connector terminal ETV line and ETV line.
Standard value: 0.3 - 100 ohms [at 20°C (68°F)]
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 6.
 
STEP 2. Check the continuity at ECM harness side connector.
(1) Disconnect the ECM connector and measure at the harness side.
(2) Measure the continuity between terminals RSG, RSH 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 open circuit and damage in RSG, RSH line between ECM connector and ground. Then go to Step 6.
 
STEP 3. Check of open circuit 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 6.
 
STEP 4. Check of open circuit and harness damage in ETV- line between throttle body assembly connector and ECM connector.
Is the harness wire in good condition?
Go to Step 5.
Repair it. 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 stored?
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 stored?
Retry the troubleshooting.
The inspection is complete.