Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - 1VD-FTV ENGINE CONTROL
CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM)
CHECK ECM TERMINAL VOLTAGE (VC TERMINAL)
REPLACE DIESEL THROTTLE BODY ASSEMBLY (for Bank 1 or Bank 2)
READ VALUE USING INTELLIGENT TESTER
REPAIR OR REPLACE HARNESS OR CONNECTOR
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
DTC P0122 Throttle / Pedal Position Sensor / Switch "A" Circuit Low Input
DTC P0123 Throttle / Pedal Position Sensor / Switch "A" Circuit High Input
DTC P0222 Throttle / Pedal Position Sensor / Switch "B" Circuit Low Input
DTC P0223 Throttle / Pedal Position Sensor / Switch "B" Circuit High Input
DESCRIPTION
The throttle position sensor is mounted on the diesel throttle body and detects the opening angle of the throttle valve. This sensor is an electronic sensor and uses Hall-effect elements.
When the throttle valve is fully closed, a voltage of approximately 0.7 V is applied to terminal VLU of the ECM. The voltage applied to terminal VLU of the ECM increases in proportion to the opening angle of the throttle valve and becomes approximately 3.5 to 4.0 V when the throttle valve is fully opened.
The ECM determines the vehicle driving conditions from the signals input to its VLU terminal. The data is one of the inputs used for EGR control, etc.
| DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
| Ignition switch ON for 3 seconds | Throttle position sensor (for Bank 1) output (VLU) is less than 0.2 V for 3 seconds (1 trip detection logic). | Throttle position sensor (for Bank 1) Open or short in VLU circuit Open in VC circuit ECM |
| DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
| Ignition switch ON for 3 seconds | Throttle position sensor (for Bank 1) output (VLU) is more than 4.8 V for 3 seconds (1 trip detection logic). | Throttle position sensor (for Bank 1) Open in E2 circuit VC and VLU circuits are short-circuited ECM |
| DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
| Ignition switch ON for 3 seconds | Throttle position sensor (for Bank 2) output (VLU2) is less than 0.2 V for 3 seconds (1 trip detection logic). | Throttle position sensor (for Bank 2) Open or short in VLU2 circuit Open in VC circuit ECM |
| DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
| Ignition switch ON for 3 seconds | Throttle position sensor (for Bank 2) output (VLU2) is more than 4.8 V for 3 seconds (1 trip detection logic). | Throttle position sensor (for Bank 2) Open in E2 circuit VC and VLU2 circuits are short-circuited ECM |
- HINT:
- If DTC P0122, P0123, P0222 and/or P0223 is stored, the following symptoms may appear:
MONITOR DESCRIPTION
When the output voltage of the throttle position sensor deviates from the normal operating range (between 0.2 V and 4.8 V) for more than 3 seconds, the ECM interprets this as a malfunction of the sensor circuit and illuminates the MIL.
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- After replacing the ECM, the new ECM needs registration () and initialization ().
- HINT:
- Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
| 1.CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM) |
Disconnect the throttle position sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance (Check for Open):
for Bank 1 (LHD) Tester Connection Condition Specified Condition C83-1 (VC) - C45-91 (VCVL) Always Below 1 Ω C83-3 (VTA) - C45-93 (VLU) Always Below 1 Ω C83-2 (E2) - C45-92 (EVLU) Always Below 1 Ω for Bank 2 (LHD) Tester Connection Condition Specified Condition C84-1 (VC) - C45-91 (VCVL) Always Below 1 Ω C84-3 (VTA2) - C45-103 (VLU2) Always Below 1 Ω C84-2 (E2) - C45-92 (EVLU) Always Below 1 Ω for Bank 1 (RHD) Tester Connection Condition Specified Condition C83-1 (VC) - C46-91 (VCVL) Always Below 1 Ω C83-3 (VTA) - C46-93 (VLU) Always Below 1 Ω C83-2 (E2) - C46-92 (EVLU) Always Below 1 Ω for Bank 2 (RHD) Tester Connection Condition Specified Condition C84-1 (VC) - C46-91 (VCVL) Always Below 1 Ω C84-3 (VTA2) - C46-103 (VLU2) Always Below 1 Ω C84-2 (E2) - C46-92 (EVLU) Always Below 1 Ω
- Standard Resistance (Check for Short):
for Bank 1 (LHD) Tester Connection Condition Specified Condition C83-1 (VC) or C45-91 (VCVL) - Body ground Always 10 kΩ or higher C83-3 (VTA) or C45-93 (VLU) - Body ground Always 10 kΩ or higher C83-2 (E2) or C45-92 (EVLU) - Body ground Always 10 kΩ or higher for Bank 2 (LHD) Tester Connection Condition Specified Condition C84-1 (VC) or C45-91 (VCVL) - Body ground Always 10 kΩ or higher C84-3 (VTA2) or C45-103 (VLU2) - Body ground Always 10 kΩ or higher C84-2 (E2) or C45-92 (EVLU) - Body ground Always 10 kΩ or higher for Bank 1 (RHD) Tester Connection Condition Specified Condition C83-1 (VC) or C46-91 (VCVL) - Body ground Always 10 kΩ or higher C83-3 (VTA) or C46-93 (VLU) - Body ground Always 10 kΩ or higher C83-2 (E2) or C46-92 (EVLU) - Body ground Always 10 kΩ or higher for Bank 2 (RHD) Tester Connection Condition Specified Condition C84-1 (VC) or C46-91 (VCVL) - Body ground Always 10 kΩ or higher C84-3 (VTA2) or C46-103 (VLU2) - Body ground Always 10 kΩ or higher C84-2 (E2) or C46-92 (EVLU) - Body ground Always 10 kΩ or higher
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| OK | |
| 2.CHECK ECM TERMINAL VOLTAGE (VC TERMINAL) |
Disconnect the throttle position sensor connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
for Bank 1 Tester Connection Switch Condition Specified Condition C83-1 (VC) - C83-2 (E2) Ignition switch ON 4.5 to 5.5 V for Bank 2 Tester Connection Switch Condition Specified Condition C84-1 (VC) - C84-2 (E2) Ignition switch ON 4.5 to 5.5 V
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| OK | |
| 3.REPLACE DIESEL THROTTLE BODY ASSEMBLY (for Bank 1 or Bank 2) |
Replace the diesel throttle body assembly (for Bank 1 or Bank 2) ().
| NEXT | |
| 4.READ VALUE USING INTELLIGENT TESTER |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON and turn the tester on.
Clear the DTCs ().
Enter the following menus: Powertrain / Engine / Data List / Actual Throttle position or Actual Throttle position #2.
Check the movement of the throttle valve when idling the engine after starting it from ignition switch ON.
| Condition | Tester Display |
| Ignition switch ON | -5 to 5% |
| Idling | 0 to 90% |
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| 5.REPLACE ECM |
Replace the ECM ().
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| 6.REPAIR OR REPLACE HARNESS OR CONNECTOR |
| NEXT | |
| 7.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED |
Connect the intelligent tester to the DLC3.
Clear the DTCs ().
Turn the ignition switch off.
Turn the ignition switch to ON for 3 seconds.
Enter the following menus: Powertrain / Engine / DTC.
Confirm that the DTC is not output again.
| NEXT | ||
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