Subaru 2009 IMPREZA Service Manual page 1749

Diagnostic Trouble Code (DTC) Detecting Criteria
3. ENABLE CONDITION
Secondary Parameters
(1) Ignition switch
(2) Ignition switch
(3) None
(4) None
(5) Throttle opening angle
(6) Brake switch (only with cruise control)
(7) None
4. GENERAL DRIVING CYCLE
(1) — (4): Always perform the diagnosis continuously.
(5): Always perform the diagnosis continuously when idling.
(6): Perform the diagnosis when the brake pedal is depressed.
(7): Always perform the diagnosis continuously.
(8): Always perform the diagnosis continuously when the cruise control pedal is not operating.
5. DIAGNOSTIC METHOD
Judge as OK and clear the NG when the malfunction criteria below are met.
Judgement Value
Malfunction Criteria
(1) Difference of CPU reading value of the
throttle position sensor signal
(2) Difference of CPU read value of the
accelerator pedal position sensor signal
(3) WD pulse from sub CPU
(4) Communication between CPU
(5) |Throttle position sensor 1 opening angle
— (Throttle position sensor 1 opening angle
after passing amplifier) 1/4|
(6) Cruise control cancel signal at brake ON
(7) Brake switch 1, 2 signal
Time Needed for Diagnosis:
1. 600 milliseconds
2. 830 milliseconds
3. 200 milliseconds
4. 200 milliseconds
5. 24 milliseconds
6. 250 milliseconds
7. 200 milliseconds
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
Enable Conditions
ON
ON
—
—
ON
—
Threshold Value
0.0858 V
0.35 V
WD pulse occur
Possible to communicate
< 3°
Cruise control cancel sig-
nal ON
SW 1 and 2 are matched
GD(H4DOTC)-161
GENERAL DESCRIPTION