Dtc P2102 Throttle Actuator Control Motor Circuit Low

Engine Hybrid System. Corolla. Zre142 Aze141
2Zr-Fe Engine Control. Corolla. Zre142 Aze141

DESCRIPTION

MONITOR DESCRIPTION

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

CONFIRMATION DRIVING PATTERN

FAIL-SAFE

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT THROTTLE BODY ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR)

CHECK HARNESS AND CONNECTOR (THROTTLE BODY - ECM)

INSPECT THROTTLE BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)

INSPECT THROTTLE BODY ASSEMBLY (THROTTLE VALVE)

DTC P2102 Throttle Actuator Control Motor Circuit Low

DTC P2103 Throttle Actuator Control Motor Circuit High


DESCRIPTION

The throttle actuator is operated by the ECM and opens and closes the throttle valve using an electric motor and gears.
The opening angle of the throttle valve is detected by the throttle position sensor, which is mounted on the throttle body. The throttle position sensor provides feedback to the ECM. This feedback allows the ECM to appropriately control the throttle actuator and monitor the throttle opening angle as the ECM responds to driver inputs.
HINT:
This electronic throttle control system does not use a throttle cable.

DTC No.
DTC Detection Condition
Trouble Area
P2102
Conditions (a) and (b) continue for 2 seconds (1 trip detection logic):
(a) Throttle actuator drive duty cycle 80% or more
(b) Throttle actuator current less than 0.5 A
  1. Open in throttle actuator circuit
  2. Throttle actuator
  3. ECM
P2103
One of following conditions is met (1 trip detection logic):
  1. Hybrid IC diagnosis signal fail
  2. Hybrid IC current limiter monitor input failure
  3. Monitor commanded monitor input high
  1. Short in throttle actuator circuit
  2. Throttle actuator
  3. Throttle valve
  4. Throttle body
  5. ECM

MONITOR DESCRIPTION

The ECM monitors the electrical current through the electronic actuator, and detects malfunctions and open circuits in the throttle actuator based on the current value. If the current is outside the standard range, the ECM determines that there is a malfunction in the throttle actuator. In addition, if the throttle valve does not function properly (for example, stuck on), the ECM determines that there is a malfunction. The ECM then illuminates the MIL and sets a DTC.
  1. Example:
    1. When the electrical current is less than 0.5 A and the throttle actuator duty ratio exceeds 80%, the ECM interprets this as the current being outside the standard range, illuminates the MIL and sets a DTC.

MONITOR STRATEGY


Related DTCs
P2102: Throttle actuator current (low current)
P2103: Throttle actuator current (high current)
Required Sensors/Components (Main)
Throttle actuator (throttle body)
Required Sensors/Components (Related)
None
Frequency of Operation
Continuous
Duration
2 seconds: P2102
0.6 seconds: P2103 (Case 1)
25 times: P2103 (Case 2 and 3)
MIL Operation
Immediate
Sequence of Operation
None

TYPICAL ENABLING CONDITIONS


All
Monitor runs whenever following DTCs are not present
None

P2102
Electronic throttle actuator
ON
Electronic throttle actuator drive duty cycle
80% or more
Electronic throttle actuator power supply voltage
8 V or more
Motor current change during latest 0.016 seconds
Less than 0.2 A

P2103 (Case 1 and 2)
Electronic throttle actuator
ON
Either of the following conditions 1 or 2 is met:
-
1. Electronic throttle actuator power supply voltage
8 V or more
2. Electronic throttle actuator power
ON

P2103 (Case 3)
Either of the following conditions 1 or 2 is met:
-
1. Electronic throttle actuator power supply voltage
8 V or more
2. Electronic throttle actuator power
ON

TYPICAL MALFUNCTION THRESHOLDS


P2102
Throttle actuator current
Less than 0.5 A

P2103 (Case 1)
Hybrid IC higher current limiter monitor input
Fail

P2103 (Case 2)
Hybrid IC diagnosis signal
Fail

P2103 (Case 3)
Motor commanded monitor input
High

CONFIRMATION DRIVING PATTERN


Corolla. Zre142 Aze141.2Zr-Fe Engine Control.Sfi System. Dtc P2102 Throttle Actuator Control Motor Circuit Low

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation) (COROLLA_ZRE142 RM000000PDK0ZAX.html).
  4. Turn the ignition switch off and wait for at least 30 seconds.
  5. Turn the ignition switch to ON and turn the Techstream on [A].
  6. Start the engine.
  7. With the vehicle stationary, fully depress the accelerator pedal and quickly release it [B].
  8. Check that 16 seconds or more have elapsed from the instant when the accelerator pedal is first depressed.
  9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].
  10. Read the pending DTCs.
    HINT:
    1. If a pending DTC is output, the system is malfunctioning.
    2. If a pending DTC is not output, perform the following procedure.
  11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
  12. Input the DTC: P2102 or P2103.
  13. Check the DTC judgment result.

    Techstream Display
    		Description
    NORMAL
    1. DTC judgment completed
    2. System normal
    ABNORMAL
    1. DTC judgment completed
    2. System abnormal
    INCOMPLETE
    1. DTC judgment not completed
    2. Perform driving pattern after confirming DTC enabling conditions
    N/A
    1. Unable to perform DTC judgment
    2. Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
    HINT:
    1. If the judgment result shows NORMAL, the system is normal.
    2. If the judgment result shows ABNORMAL, the system has a malfunction.
    3. If the judgment result shows INCOMPLETE or N/A, perform steps [B] through [C] again.
  14. If no pending DTC is output, perform a universal trip and check for permanent DTCs (COROLLA_ZRE142 RM000000PDK0ZAX.html).
    HINT:
    1. If a permanent DTC is output, the system is malfunctioning.
    2. If no permanent DTC is output, the system is normal.

FAIL-SAFE

When any of these DTCs or other DTCs relating to electronic throttle control system malfunctions, is set, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator, and the throttle valve is returned to a 5.5° throttle angle by the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing, in accordance with the accelerator pedal opening angle, to allow the vehicle to continue running at a minimal speed. If the accelerator pedal is depressed gently, the vehicle can be driven slowly.
Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned off.

WIRING DIAGRAM


Corolla. Zre142 Aze141.2Zr-Fe Engine Control.Sfi System. Dtc P2102 Throttle Actuator Control Motor Circuit Low


INSPECTION PROCEDURE

HINT:
  1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
  2. The throttle actuator current [Throttle Motor Current] and the throttle actuator duty ratio Throttle Motor Open Duty / Throttle Motor Close Duty can be read using the Techstream. However, the ECM shuts off the throttle actuator current when the electronic throttle control system malfunctions.
1.INSPECT THROTTLE BODY ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR)

  1. Inspect the throttle body assembly (COROLLA_ZRE142 RM000001CZ8021X.html).



NG
REPLACE THROTTLE BODY ASSEMBLY (COROLLA_ZRE142 RM0000030MA016X.html)
OK


2.CHECK HARNESS AND CONNECTOR (THROTTLE BODY - ECM)

  1. Disconnect the throttle body connector.

  1. Disconnect the ECM connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance (Check for Open):

    Tester Connection
    		Condition
    		Specified Condition
    B25-2 (M+) - B31-43 (M+)
    		Always
    		Below 1 Ω
    B25-1 (M-) - B31-42 (M-)
    		Always
    		Below 1 Ω

    Standard Resistance (Check for Short):

    Tester Connection
    		Condition
    		Specified Condition
    B25-2 (M+) or B31-43 (M+) - Body ground
    		Always
    		10 kΩ or higher
    B25-1 (M-) or B31-42 (M-) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the ECM connector.

  1. Reconnect the throttle body connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (THROTTLE BODY - ECM)
OK


3.INSPECT THROTTLE BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)

  1. Check for foreign objects between the throttle valve and the housing.

    OK:
    No foreign objects between throttle valve and housing.


NG
REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY ASSEMBLY
OK


4.INSPECT THROTTLE BODY ASSEMBLY (THROTTLE VALVE)

  1. Check if the throttle valve opens and closes smoothly.

    OK:
    Throttle valve opens and closes smoothly.


NG
REPLACE THROTTLE BODY ASSEMBLY (COROLLA_ZRE142 RM0000030MA016X.html)
OK

REPLACE ECM (COROLLA_ZRE142 RM000001CN0030X.html)