The Electronic Throttle Control(ETC) system is made of the components throttle body, Throttle Position Sensor(TPS)1&2 and Accelerator Position Sensor(APS) 1&2. The throttle body contains the actuator, the throttle plate and the throttle position sensor (potentiometer), which are integrated in one housing. The actuator consists of a DC motor with a two-stage gear. The opening angle of the throttle valve is detected by the throttle position sensor which is mounted on the throttle body. And it provides feedback to the PCM to control the throttle motor in order to control the throttle valve opening angle properly in response to the driving condition.
If power management mode is recognized under detecting condition, PCM sets P1295. And MIL(Malfunction Indication Lamp) turns on.
Item
Detecting Condition
Possible cause
DTC Strategy
? This code detects if the system is in Power Management Mode
? Faulty ETC Items(TPS or ETC motor etc)
? TPS Malfunction + MAFSMalfunction
? MAP Malfunction + TPS Malfunction
? Faulty PCM
Enable Conditions
? Ignition On
Threshold value
? Power Management Mode is active
Diagnosis Time
-
MIL On Condition
? 1 Driving Cycle
[Tip 1]
- If Main relay has a fault(ex. Open) under engine running, the DTCs, P0638/P0685/P1295/P2106, can happen at the same time.
[Tip 2]
- If P1295 and P2104 occur at the same time, first check APS and ETC items(TPS or ETC motor etc).
[Tip 3]
- If P1295 and P2106 occur at the same time, first check ETC items(TPS or ETC motor etc).
? DTC Name
- P0638 Throttle Actuator Control Range/Performance(Bank 1)
- P0685 PCM/PCM Power Relay Control Circuit /Open
- P2104 Throttle Actuator Control System - Forced Idle
- P2106 Throttle Actuator Control System - Forced Limited Power