DTC Advanced Diagnostics: P1683

DTC P1683:Throttle Valve Default Position Spring Performance Problem

General Description

The electronic throttle control system controls the throttle valve opening. The system includes the throttle actuator, the throttle valve, throttle position (TP) sensors A and B, the electronic throttle control system (ETCS) control relay, the accelerator pedal position (APP) sensor, and the powertrain control module (PCM). The throttle valve default position spring is attached to the throttle valve gear. It opens the throttle valve to improve starting performance in cold conditions, or to retain minimum running performance in case of an electronic throttle control system failure. To confirm that the throttle valve is operating normally, and if the detecting condition meets, the throttle valve moves to a fully closed position and opens to the target position by the throttle valve default position spring. If the throttle valve does not move to the target position range, the PCM detects a throttle valve default position spring malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Once per driving cycle
Sequence	None
Duration	2.5 seconds or more
DTC Type	One drive cycle, MIL on

Enable Conditions

Condition	Minimum	Maximum
Engine coolant temperature [ECT SENSOR 1]	158 °F (70 °C)	–
12 volt battery voltage [BATTERY]	6.0 V	–
Vehicle	OFF (LOCK) mode

[ ]: HDS Parameter

Malfunction Threshold

The throttle valve position is 5 ° or more from the fully closed position, or 3 ° or less from the fully closed position, for at least 2.5 seconds.

Possible Cause

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

	Throttle valve default position spring abnormal
	Throttle valve friction increase (poor action)

Confirmation Procedure

Operating Condition

1.	Start the engine. Hold the engine speed [ENGINE SPEED] at 3,000 rpm without load (CVT in P or N, M/T in neutral) until the radiator fan comes on.
2.	Turn the vehicle to the OFF (LOCK) mode, and wait 10 seconds.
3.	Turn the vehicle to the ON mode.

With the HDS

None.

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.

Conditions for clearing the DTC

The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.