P1110

SYSTEM DESCRIPTION
The valve timing control system is utilized to control intake valve opening and closing timing. Engine coolant temperature signals, engine speed and throttle position are used to determine intake valve timing.
The intake camshaft sprocket position is regulated by oil pressure controlled by the intake valve timing control.
When ECM sends ON signal to intake valve timing control solenoid valve, oil pressure is transmitted to camshaft sprocket. Then, intake side camshaft is advanced.







OPERATION




CONSULT REFERENCE VALUE IN DATA MONITOR MODE




ECM TERMINALS AND REFERENCE VALUE
Specification data are reference values and are measured between each terminal and (43) (ECCS ground).




ON BOARD DIAGNOSIS LOGIC

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE
Procedure for Malfunction A
With Consult
(1) Turn ignition switch "ON".
(2) Select "DATA MONITOR" mode with CONSULT.
(3) Wait at least 5 seconds.

OR

With GST
(1) Turn ignition switch "ON" and wait at least 5 seconds.
(2) Select "MODE 3" with GST.

OR

No Tools
(1) Turn ignition switch "ON", wait at least 5 seconds.
(2) Perform "Diagnostic Test Mode II" (Self-diagnostic results) with ECM.

OVERALL FUNCTION CHECK
Use this procedure to check the overall function of the VTC. During this check, a DTC might not be confirmed.

Procedure for Malfunction B
With Consult
(1) Disconnect vacuum hose from fuel pressure regulator and then connect the hose to vacuum gauge.
(2) Turn ignition switch "ON" and select "VALVE TIMING SOL" in "ACTIVE TEST" mode with CONSULT.
(3) Start engine and warm it up sufficiently.
(4) Keep engine speed at approximately 3,000 rpm and make sure vacuum gauge indicator becomes stable.
(5) Make sure that the difference of vacuum pressure is approximately 1.3 kPa (10 mmHg, 0.39 inHg) when alternating "ON" and "OF F" with CONSULT.

Reference value
VTC "ON": Approximately -73.3 kPa (-550 mmHg, -21.65 inHg)
VTC "OFF": Approximately -72.0 kPa (-540 mmHg, -21.26 inHg)

OR

Without Consult
(1) Disconnect vacuum hose from fuel pressure regulator and then connect the hose to vacuum gauge.
(2) Disconnect VTC solenoid valve harness connector.
(3) Start engine and warm it up sufficiently.
(4) Keep engine speed at approximately 3,000 rpm and make sure vacuum gauge indicator becomes stable.
(5) Make sure that the vacuum pressure changes more than 1.3 kPa (10 mmHg, 0.39 inHg) when supplying the solenoid valve terminals with battery voltage.

Reference value:
Battery voltage supplied:
Approx. -73.3 kPa (-550 mmHg, -21.65 inHg) No battery voltage supplied:
Approx. -72.0 kPa (-540 mmHg, -21.26 inHg)

NOTE: DTC 0805 may be stored in ECM during "OVERALL FUNCTION CHECK". Ignore it.







DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION
Intake Valve Timing Control Solenoid Valve
1. Supply intake valve timing control solenoid valve terminals with battery voltage.




2. Make sure that inside plunger protrudes.
If NG, replace intake valve timing control solenoid valve.