DTC P0120/41 Throttle Position Sensor Circuit Malfunction

Transcription

1 DI42 EINE DI63S01 DTC P0120/41 Throttle Position Sensor Circuit Malfunction CIRCUIT DESCRIPTI Throttle position sensor is mounted on the throttle body and it have the 2 sensors to detect the throttle opening angle and the malfunction of the throttle position sensor s own. The voltage applied to the terminals and of the engine ECU changes between 0 V and 5 V in proportion to the opening angle of the throttle valve. The engine ECU judges the current opening angle of the throttle valve from these signals input from terminals and, and the engine ECU controls the throttle motor to make the throttle valve angle properly in response to driving condition. If this DTC is stored, the engine ECU shuts down the power for the throttle motor and the electromagnetic clutch, and the throttle valve is fully closed by the return spring. However, the opening angle of the throttle valve can be controlled by the accelerator pedal through the throttle cable. Movable Range Usable Range A02395 A02396 *1 *2 *1 *2 Movable Range Usable Range Throttle Position Sensor Output Voltage (V) 5 *1: Accelerator pedal released (15 ) *2: Accelerator pedal depressed 1.5 (about 100 ) *1 *2 Usable Range Throttle Valve Opening Angle (deg) A02624 DTC No. DTC Detecting Condition Trouble Area P0120/41 Condition (a), (b), (c) or (d) continues for 2.0 seconds: (a) 0.2 V (b) 0.5 V (c) 4.8 V (d) When 0.2 V and 2.0 V, and 4.97 V (e) 0.02 V S Open or short in throttle position sensor circuit S Throttle position sensor S Engine ECU Condition (a) or (b) continues for 0.4 seconds: (a) 0.2 V and 0.5 V HINT: After confirming DTC P0120/41, use the handheld tester to confirm the throttle valve opening percentage and closed throttle position switch condition. Accelerator pedal position expressed as percentage and voltage Accelerator pedal released Accelerator pedal depressed Trouble area THROTTLEPOS THROTTLEPOS#2 THROTTLEPOS THROTTLEPOS#2 lineopen V V line open or grand short % lineopenorgrandshort 100 % 5V 100 % 5V line open

2 EINE DI43 WIRI DIAGRAM Throttle Position Sensor Engine ECU WR LY RB BR A03843 INSPECTI PROCEDURE HINT: S If DTCs P0105/31, P0106/31, P0110/24, P0115/22, P0120/41, P0121/41, P1120/19 and P1121/19 S are output simultaneously, (sensor ground) may be open. Read freeze frame data using hand held tester. Because freeze frame records the engine conditions when the malfunction is detected. When troubleshooting it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the fuel airatio was lean or rich, etc. at the time of the malfunction. When using handheld tester: 1 Connect handheld tester, read throttle valve opening percentage. (a) Connect the handheld tester to the DLC3. (b) Turn the ignition switch and push the held hand tester main switch. Read the throttle valve opening percentage for the circuit and read the voltage for the circuit. : FI7052 Accelerator pedal Throttle valve opening position expressed as percentage Voltage () () Released 8 20 % V Depressed % V IN32).

3 DI44 EINE 2 Check voltage between terminals and of engine ECU connector. BE6653 A02365 (+) () A05001 Measure the voltage between terminals and of the engine ECU connector. : Voltage: V IN32). 3 Check voltage between terminals, and of engine ECU connector. Measure the voltage between terminals and, and and of the engine ECU connector. : (+) () A09167 Voltage Accelerator pedal d l Released V V Depressed V V IN32). 4 Check throttle position sensor (See page 32). FI Replace throttle position sensor (See page FI37).

4 EINE DI45 Check for open and short in harness and connector in,, and circuits between engine ECU and throttle position sensor (See page 32). IN When not using handheld tester: 1 Check voltage between terminals and of engine ECU connector. BE6653 A02365 (+) () A05001 Measure the voltage between terminals and of the engine ECU connector. : Voltage: V IN32). 2 Check voltage between terminals and, and and of engine ECU connector. Measure the voltage between terminals and, and and of the engine ECU connector. : (+) () A09167 Voltage Accelerator Pedal d l Released V V Depressed V V IN32). 3 Check throttle position sensor (See page 32). FI

5 DI46 EINE Replace throttle position sensor (See page FI37). Check for open and short in harness and connector in,, and circuits between engine ECU and throttle position sensor (See page 32). IN