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 (tp) sensor, which is mounted on the throttle body. The tp sensor provides feedback to the ecm in order that it can control the throttle actuator, and therefore the throttle valve, appropriately in response to driver inputs.
Hint:
This etcs (electronic throttle control system) does not use a throttle cable.
Monitor description
The ecm determines that there is a malfunction in the etcs when the throttle valve remains at a fixed angle despite a high drive current from the ecm. The ecm illuminates the mil and sets a dtc.
If the malfunction is not repaired successfully, a dtc is set when the accelerator pedal is fully depressed and released quickly (to fully open and close the throttle valve) after the engine is next started.
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
Fail-safe
When either of these dtcs, or 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 firmly and 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
Refer to dtc p2102 (see page es-266).
Inspection procedure
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, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
Hint:
If any dtcs other than p2111 or p2112 are output, troubleshoot those dtcs first.
Ok: throttle valve is not contaminated with foreign objects and moves smoothly.
Driving the vehicle
The following procedures
should be observed to
ensure safe driving:
Driving procedure
â– Driving
1. With the brake pedal
depressed, shift the shift
lever to D.
2. Release the parking brake.
If the parking brake is in automatic
mode, the parking brake will be
released automatically.
3. Gradually re ...
Removal
Discharge refrigerant from
refrigeration system (see page ac-172)
Disconnect cable from negative battery
terminal
Caution:
Wait at least 90 seconds after disconnecting the
cable from the negative (-) battery terminal to
prevent airbag and seat belt pretensioner activation.
Remove ...
Dtc check / clear
Check dtc
Connect the intelligent tester to the dlc3.
Turn the ignition switch on and turn the tester on.
Select the following menu item: body / sliding roof /
dtc.
Check the dtc(s).
Clear dtc
Connect the intelligent tester to the dlc3.
Turn the ignition switch on ...