Variable Valve Timing System - Subaru Impreza 2002 Service Manual

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
18.Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DI: DTC P0011
— VARIABLE VALVE TIMING SYSTEM 1 (RH) —
• DTC DETECTING CONDITION:
• Immediately at fault recognition
• TROUBLE SYMPTOM:
• Engine stalls.
• Erroneous idling
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(TURBO)-45, OP-
ERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(TURBO)-42, Inspection Mode.>.
Step
1 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODE (DTC) ON DISPLAY.
2 CHECK CURRENT DATA.
1)Start the engine and let it idle.
2)Inspect the variable valve timing system
operating angle and variable valve timing sole-
noid valve duty output using Subaru Select
Monitor and OBD-II general scan tool.
Specification:
•Variable valve timing system operating angle:
Approx. 0 degree
•Variable valve timing solenoid valve duty out-
put: Approx. 10%
NOTE:
•Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE".
<Ref. to EN(TURBO)-34, Subaru Select Moni-
tor.>
•OBD-II general scan tool
For detailed operation procedures, refer to the
OBD-II General Scan Tool Instruction Manual.
Check
Is any other DTC displayed?
Is the measured value largely
out of specification?
EN(TURBO)-19
ENGINE (DIAGNOSTICS)
Yes
Inspect the rele- Go to step 2.
vant DTC using
"List of Diagnostic
Trouble Code
(DTC)".<Ref. to
EN(TURBO)-18,
List of Diagnostic
Trouble Code
(DTC).>
Inspect the follow- A temporary mal-
ing items and function. Conduct
repair or replace if the following to
necessary. clean the oil pas-
• Engine oil sage.
(amount, con- Replace the
tamination) engine oil and idle
• Oil pipe (clog) the engine for 5
• Variable minutes, then
valve timing replace the oil filter
solenoid valve and engine oil.
(clog or con-
tamination in oil
passage, set-
tling at spring,
stuck at valve)
• Intake cam-
shaft (sludge,
damage at
camshaft)
• Timing belt
(timing mark
aligning)
No