Engine. Camry. Acv40 Gsv40
2Az-Fe Engine Control System. Camry. Acv40 Gsv40
READ VALUE USING INTELLIGENT TESTER (THROTTLE POSITION AND THROTTLE POSITION NO. 2)
CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM)
REPLACE THROTTLE BODY ASSEMBLY
CHECK WHETHER DTC OUTPUT RECURS (THROTTLE POSITION SENSOR DTCS)
DTC P0120 Throttle / Pedal Position Sensor / Switch "A" Circuit Malfunction |
DTC P0122 Throttle / Pedal Position Sensor / Switch "A" Circuit Low Input |
DTC P0123 Throttle / Pedal Position Sensor / Switch "A" Circuit High Input |
DTC P0220 Throttle / Pedal Position Sensor / Switch "B" Circuit |
DTC P0222 Throttle / Pedal Position Sensor / Switch "B" Circuit Low Input |
DTC P0223 Throttle / Pedal Position Sensor / Switch "B" Circuit High Input |
DTC P2135 Throttle / Pedal Position Sensor / Switch "A" / "B" Voltage Correlation |
- HINT:
- These DTCs relate to the Throttle Position (TP) sensor.
DESCRIPTION
The Throttle Position (TP) sensor is mounted on the throttle body assembly, and detects the opening angle of the throttle valve. This sensor is a non-contact type. It uses Hall-effect elements in order to yield accurate signals even in extreme driving conditions such as at high speeds and very low speeds.The TP sensor has two sensor circuits which each transmit a signal, VTA1 and VTA2. VTA1 is used to detect the throttle valve angle and VTA2 is used to detect malfunctions in VTA1. The sensor signal voltages vary between 0 V and 5 V in proportion to the throttle valve opening angle, and are transmitted to the VTA terminals of the ECM.
As the valve closes, the sensor output voltage decreases and as the valve opens, the sensor output voltage increases. The ECM calculates the throttle valve opening angle according to these signals and controls the throttle actuator in response to driver inputs. These signals are also used in calculations such as air-fuel ratio correction, power increase correction and fuel-cut control.
| DTC No. | DTC Detection Condition | Trouble Area |
| P0120 | Output voltage of VTA1 quickly fluctuates beyond lower and upper malfunction thresholds for 2 seconds when accelerator pedal depressed (1 trip detection logic) |
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| P0122 | Output voltage of VTA1 0.2 V or less for 2 seconds when accelerator pedal depressed (1 trip detection logic) |
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| P0123 | Output voltage of VTA1 4.535 V or more for 2 seconds when accelerator pedal depressed (1 trip detection logic) |
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| P0220 | Output voltage of VTA2 quickly fluctuates beyond lower and upper malfunction thresholds for 2 seconds when accelerator pedal depressed (1 trip detection logic) |
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| P0222 | Output voltage of VTA2 1.75 V or less for 2 seconds when accelerator pedal depressed (1 trip detection logic) |
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| P0223 | Output voltage of VTA2 4.8 V or more, and VTA1 between 0.2 V and 2.02 V, for 2 seconds when accelerator pedal depressed (1 trip detection logic) |
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| P2135 | Either condition (a) or (b) is met (1 trip detection logic): (a) Difference between output voltages of VTA1 and VTA2 0.02 V or less for 0.5 seconds or more (b) Output voltage of VTA1 0.2 V or less, and VTA2 1.75 V or less, for 0.4 seconds or more |
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- HINT:
- When any of these DTCs are set, check the throttle valve opening angle by selecting the following menu items on the intelligent tester: Powertrain / Engine and ECT / Data List / Throttle Position and Throttle Position No. 2.
- Throttle Position denotes the VTA1 signal, and Throttle Position No. 2 denotes the VTA2 signal.
- Reference (Normal Condition):
Tester Display Accelerator Pedal Fully Released Accelerator Pedal Fully Depressed Throttle Position 0.5 to 1.1 V 3.3 to 4.9 V Throttle Position No. 2 2.1 to 3.1 V 4.6 to 5.0 V
FAIL-SAFE
When any of these DTCs, as well as other DTCs relating to ETCS (Electronic Throttle Control System) malfunctions, are set, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator off, and the throttle valve is returned to a 6° 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 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
INSPECTION PROCEDURE
- HINT:
- Read freeze frame data using the intelligent tester. 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.
| 1.READ VALUE USING INTELLIGENT TESTER (THROTTLE POSITION AND THROTTLE POSITION NO. 2) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position and turn the tester on.
Select the following menu items: Powertrain / Engine and ECT / Data List / Throttle Position and Throttle Position No. 2.
Read the values displayed on the tester.
- Result:
TP (VTA1)
When Accelerator pedal ReleasedTP No. 2 (VTA2)
When Accelerator pedal ReleasedTP (VTA1)
When Accelerator pedal DepressedTP No. 2 (VTA2)
When Accelerator pedal DepressedTrouble Area Proceed to 0 V to 0.2 V 0 V to 0.2 V 0 V to 0.2 V 0 V to 0.2 V VC circuit open A 4.5 V to 5.0 V 4.5 V to 5.0 V 4.5 V to 5.0 V 4.5 V to 5.0 V E2 circuit open 0 V to 0.2 V,
or 4.5 V to 5.0 V2.4 V to 3.4 V
(Fail-safe)0 V to 0.2 V,
or 4.5 V to 5.0 V2.4 V to 3.4 V
(Fail-safe)VTA1 circuit open or ground short 0.7 V to 1.3 V
(Fail-safe)0 V to 0.2 V,
or 4.5 V to 5.0 V0.7 V to 1.3 V
(Fail-safe)0 V to 0.2 V,
or 4.5 V to 5.0 VVTA2 circuit open or ground short 0.5 V to 1.1 V 2.1 V to 3.1 V 3.3 V to 4.9 V
(Not fail-safe)4.6 V to 5.0 V
(Not fail-safe)TP sensor circuit normal B
- HINT:
- TP denotes Throttle Position, and TP No. 2 denotes Throttle Position No. 2.
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| A | |
| 2.CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM) |
Disconnect the C5 throttle body connector.
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Disconnect the C24 ECM connector.
Measure the resistance between the terminals of the wire harness side connectors.
- Standard resistance (Check for open):
Tester Connection Specified Condition VC (C5-5) - VCTA (C24-67) Below 1 Ω VTA (C5-6) - VTA1 (C24-115) VTA2 (C5-4) - VTA2 (C24-114) E2 (C5-3) - ETA (C24-91)
- Standard resistance (Check for short):
Tester Connection Specified Condition VC (C5-5) or VCTA (C24-67) - Body ground 10 kΩ or higher VTA (C5-6) or VTA1 (C24-115) - Body ground VTA2 (C5-4) or VTA2 (C24-114) - Body ground
Reconnect the throttle body connector.
Reconnect the ECM connector.
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| OK | |
| 3.INSPECT ECM (VC VOLTAGE) |
Disconnect the C5 throttle body connector.
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Turn the ignition switch to the ON position.
Measure the voltage between the terminals of the throttle body connector.
- Standard voltage:
Tester Connection Specified Condition VC (C5-5) - E2 (C5-3) 4.5 to 5.5 V
Reconnect the throttle body connector.
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| OK | |
| 4.REPLACE THROTTLE BODY ASSEMBLY |
| NEXT | |
| 5.CHECK WHETHER DTC OUTPUT RECURS (THROTTLE POSITION SENSOR DTCS) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position and turn the tester on.
Clear the DTCs (CAMRY_ACV40 RM000000PDK081X.html).
Start the engine.
Allow the engine to idle for 15 seconds or more.
Select the following menu items: Powertrain / Engine and ECT / DTC.
Read the DTCs.
- Result:
Display (DTC Output) Proceed to P0120, P0122, P0123, P0220, P0222, P0223 and/or P2135 A No output B
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| A | ||
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