Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - 1GR-FE ENGINE CONTROL
INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR)
CHECK HARNESS AND CONNECTOR (THROTTLE BODY WITH MOTOR ASSEMBLY - ECM)
INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY
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 gears.
The opening angle of the throttle valve is detected by the throttle position sensor, which is mounted on the throttle body with motor 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 opening angle as the ECM responds to driver inputs.
- HINT:
- This ETCS (Electronic Throttle Control System) does not use a throttle cable.
DTC No. | DTC Detection Condition | Trouble Area |
P2102 | Conditions (a) and (b) are met for 2.0 seconds (1 trip detection logic): (a) Throttle actuator duty ratio is 80% or more. (b) Throttle actuator current is below 0.5 A. | Open in throttle actuator circuit Throttle actuator ECM |
P2103 | Either condition is met (1 trip detection logic): There is a hybrid IC diagnosis signal failure. There is a hybrid IC current limiter port failure. | Short in throttle actuator circuit Throttle actuator Throttle valve Throttle body with motor assembly ECM |
MONITOR DESCRIPTION
The ECM monitors the electrical current flowing through the electronic actuator and detects malfunctions and open circuits in the throttle actuator based on this 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, if it is stuck on), the ECM determines that there is a malfunction. The ECM then illuminates the MIL and stores a DTC.
Example:
When the electrical current is below 0.5 A and the throttle actuator duty ratio is 80% or more, the ECM interprets this as the current being outside the standard range, illuminates the MIL and stores DTC P2102.
If the malfunction is not repaired successfully, the DTC is stored when the engine is quickly revved to a high rpm several times after the engine is started and has idled for 5 seconds.
FAIL-SAFE
When either of these DTCs or other DTCs relating to ETCS (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 7° 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 firmly and gently, the vehicle can be driven slowly.
The ECM continues operating in fail-safe mode until a pass condition is detected and the ignition switch is turned off.
WIRING DIAGRAM
INSPECTION PROCEDURE
- HINT:
1.INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR) |
Inspect the throttle body with motor assembly ().
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OK | |
2.CHECK HARNESS AND CONNECTOR (THROTTLE BODY WITH MOTOR ASSEMBLY - ECM) |
Disconnect the throttle body with motor assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for LHD Tester Connection Condition Specified Condition C3-2 (M+) - C45-19 (M+) Always Below 1 Ω C3-1 (M-) - C45-18 (M-) Always Below 1 Ω C3-2 (M+) or C45-19 (M+) - Body ground Always 10 kΩ or higher C3-1 (M-) or C45-18 (M-) - Body ground Always 10 kΩ or higher for RHD Tester Connection Condition Specified Condition C3-2 (M+) - C46-19 (M+) Always Below 1 Ω C3-1 (M-) - C46-18 (M-) Always Below 1 Ω C3-2 (M+) or C46-19 (M+) - Body ground Always 10 kΩ or higher C3-1 (M-) or C46-18 (M-) - Body ground Always 10 kΩ or higher
Reconnect the throttle body with motor assembly connector.
Reconnect the ECM connector.
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OK | |
3.INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY |
Check for foreign objects between the throttle valve and housing.
- OK:
- No foreign objects between throttle valve and housing.
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OK | |
4.INSPECT THROTTLE VALVE |
Check if the throttle valve opens and closes smoothly.
- OK:
- Throttle valve opens and closes smoothly.
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OK | ||
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