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
Perform "Procedure for malfunction A" first. If the 1st trip DTC cannot be confirmed, perform "Procedure for malfunction B".

Procedure for malfunction A

NOTE: If "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch "OFF" and wait at least 5 seconds before conducting the next test.

With CONSULT
(1) Turn ignition switch "ON".
(2) Select "DATA MONITOR" mode with CONSULT.
(3) Wait at least 5 seconds.

OR

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

OR

Without Scan Tools
(1) Turn ignition switch "ON", wait at least 5 seconds.
(2) Perform "Diagnostic Test Mode II" (Self-diagnostic results) with ECM.




Procedure for malfunction B

CAUTION: Always drive vehicle at a safe speed.

NOTE: If "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch "OFF" and wait at least 5 seconds before conducting the next test.

TESTING CONDITION:
Always perform the test at a temperature of -10°C (14°F) or higher.

With CONSULT
(1) Start engine and warm it up to normal operating temperature.
(2) Turn ignition switch "OFF" and wait at least 5 seconds.
(3) Turn ignition switch "ON" and select "DATA MONITOR" mode with CONSULT.
(4) Check the output voltage of "THRTL POS SEN" (at closed throttle position) and note it.
(5) Restart engine and wait at least 3 minutes.
(6) Maintain the following conditions until the "ON-OFF"
interval of "INT/V TIM SOL" in "DATA MONITOR" with CONSULT has been repeated at least 10 times.

NOTE: When the following conditions are met, diagnosis can begin. As soon as diagnosis begins, the "INT/V TIM SOL" on the CONSULT display repeats the ON-OFF operation.

CMPS-RPM (REF): 2,000 - 3,000 rpm
VHCL SPEED SE: More than 70 km/h (43 MPH)
THRTL POS SEN: (X + 1.00) - (X + 1.76) V
B/FUEL SCHDL: 4.2 - 5.7 ms
Selector lever: Suitable position
Driving pattern: Driving uphill (increased engine load) will help maintain the driving conditions required for this test.
X = Voltage value measured at step 4)
(7) Make sure that "OK" is displayed after touching "SELF-DIAG RESULTS".
If "NG" is displayed, refer to "DIAGNOSTIC PROCEDURE".

OR







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

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 to normal operating temperature.
(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




WIRING DIAGRAM




COMPONENT INSPECTION
Intake Valve Timing Control Solenoid Valve
1. Check oil passage visually for any metal debris.
2. Supply intake valve timing control solenoid valve terminals with battery voltage.
3. Make sure that inside plunger protrudes.
If NG, replace intake valve timing control solenoid valve.