Description
The electronic throttle control system (etcs) is composed of the throttle actuator, throttle position (tp) sensor, accelerator pedal position (app) sensor, and ecm. The ecm operates the throttle actuator to regulate the throttle valve in response to driver inputs. The tp sensor detects the opening angle of the throttle valve, and provides the ecm with feedback so that the throttle valve can be appropriately controlled by the ecm.
Monitor description
The ecm determines the actual opening angle of the throttle valve from the tp sensor signal. The actual opening angle is compared to the target opening angle commanded by the ecm. If the difference between these two values is outside the standard range, the ecm interprets this as a malfunction in the etcs. The ecm then illuminates the mil and sets the dtc.
If the malfunction is not repaired successfully, the dtc is set when the accelerator pedal is quickly released (to close the throttle valve) after the engine speed reaches 5,000 rpm by the accelerator pedal being fully depressed (fully open the throttle valve).
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
Fail-safe
When this dtc, 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 to 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 p2119 are output, troubleshoot those dtcs first.
Caution:
Exercise extreme care and take precautions in steps (f) and (g) below. Failure to do so may result in the vehicle unexpectedly rolling away.
Diagnosis / enhanced obd ii / dtc info / current codes.
Hint:
The output voltage of the throttle position sensor can be checked during step (g) using the intelligent tester. Variations in the output voltage indicate that the throttle actuator is in operation. To check the output voltage using the intelligent tester, select the following menu items: diagnosis / enhanced obd ii / data list / etcs / throttle pos #1.
Ok: no dtc output.
Air fuel ratio sensor
Components
On-vehicle inspection
Check air fuel ratio compensation system
Connect the intelligent tester to the dlc3.
Turn the ignition switch on.
Select the following menu items: data list / a/fs b1
s1 and o2s b1 s2.
Warm up the a/f sensor with the engine speed at
2,500 ...
Diagnosis system
Check dlc3
Check the dlc3:
the power steering ecu uses can (iso11898-1)
and iso9141-2 for communication protocol. The
terminal arrangement of the dlc3 complies with
sae j1962 and matches the iso9141-2 format.
Notice:
*: Before measuring the resistance, leave the
vehicle ...
Sun visors and vanity
mirrors
Sun visors
Forward position:
flip down.
Side position:
flip down, unhook, and swing
to the side.
Side extender (if equipped):
place in side position then slide
backwards.
Vanity mirrors
Slide the cover to open.
The light turns on when the cover
is opened.
Notice
To ...