Component Location

1. CVVL motor relay

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.

PCM monitors the power line from battery to PCM for motor control.

DTC Description

ECU sets P1034 when there is a electrical problem for power supply due to open circuit of DC motor.

DTC Detecting Condition

Item

Detecting Condition

Possible cause

DTC Strategy

•

Control current isn't generated even though PWM for motor control is going out.

1.

PCM controller

2.

CVVL motor

EnableConditions

•

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

•

No P013C

•

CVVL Relay ON

Threshold value

•

PWM for motor control is higher than 17%, control current for DC motor is lower than 1A.

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 and CVVL DC motor control current using GDS current data.

Яндекс.Метрика