SFI SYSTEM, Diagnostic DTC:P2102 and P2103
| DTC Code | DTC Name |
|---|---|
| P2102 | Throttle Actuator Control Motor Circuit Low |
| P2103 | Throttle Actuator Control Motor Circuit High |
DESCRIPTION
The throttle actuator is operated by the ECM and opens and closes the throttle valve using gears.
The opening angle of the throttle valve is detected by the throttle position sensor, which is mounted on the throttle body assembly. The throttle position sensor provides feedback to the ECM. This feedback allows the ECM to appropriately control the throttle actuator and monitor the throttle valve opening angle as the ECM responds to driver inputs.
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 2.0 seconds (1 trip detection logic): (a) The throttle actuator duty ratio is 80% or more. (b) The throttle actuator current is 0.5 A or less. |
|
P2103 |
Either of conditions is met (1 trip detection logic):
|
|
FAIL-SAFE
When either of these DTCs or other DTCs relating to electronic throttle control system malfunctions are stored, 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° opening 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 position, to allow the vehicle to continue 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 turned off.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
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 GTS. However, the ECM shuts off the throttle actuator current when the electronic throttle control system malfunctions.
PROCEDURE
INSPECT THROTTLE BODY ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR)
Inspect the throttle body assembly (Click here).
Tip:Perform "Inspection After Repair" after replacing the throttle body assembly (Click here).
CHECK HARNESS AND CONNECTOR (THROTTLE ACTUATOR - ECM)
Disconnect the throttle body assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open)
Tester Connection
Condition
Specified Condition
C9-2 (M+) - C111-60 (M+)
Always
Below 1 Ω
C9-1 (M-) - C111-30 (M-)
Always
Below 1 Ω
Standard Resistance (Check for Short)
Tester Connection
Condition
Specified Condition
C9-2 (M+) or C111-60 (M+) - Body ground
Always
10 kΩ or higher
C9-1 (M-) or C111-30 (M-) - Body ground
Always
10 kΩ or higher
Reconnect the throttle body assembly connector.
Reconnect the ECM connector.
REPAIR OR REPLACE HARNESS OR CONNECTOR (THROTTLE ACTUATOR - ECM)
INSPECT THROTTLE BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)
Check for foreign objects between the throttle valve and the housing.
OK
No foreign objects between throttle valve and housing.
Tip:Perform "Inspection After Repair" after cleaning the throttle body assembly (Click here).
REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY ASSEMBLY
INSPECT THROTTLE BODY ASSEMBLY (THROTTLE VALVE)
Check if the throttle valve opens and closes smoothly.
OK
Throttle valve opens and closes smoothly.
Tip:Perform "Inspection After Repair" after replacing the throttle body assembly (Click here).