Component Location

1. CVVL Sensor

General Description

CVVL (Continuously Variable Valve Lift) is a system that can change the valve lift continuously and it controls the amount of air flow by variable valve lifting. CVVL drives the valve lifts with optimization for engine RPM and improves fuel efficiency through reducing the pumping and friction loss. Also it can reduce the activation time of catalyst by improvement of response speed for acceleration.Motor control power is supplied through CVVL relay. ECU sets DTC when CVVL relay has a electrical problem.

DTC Description

ECU sets P103C when there is an electrical error for CVVL relay.

DTC Detecting Condition

Item

Detecting Condition

Possible cause

DTC Strategy

•

There is an electrical error for CVVL relay.

1.

CVVL relay

2.

Poor connection

3.

Open or short circuit of CVVL Motor power supply

EnableConditions

•

Battery voltage is higher than 10V and lower than 16V.

•

CVVL relay ON

Threshold value

•

Upper or lowest threshold

Diagnosis Time

•

1.5 sec

MIL On Condition

•

First driving cycle (MIL On)

Diagnostic Circuit Diagram
Signal Waveform & Data

Check the status of CVVL Motor relay ON/OFF using GDS current data.

Яндекс.Метрика