2009 SUBARU TRIBECA engine

GD(H6DO)-124
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CC:DTC P0442 EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECT-
ED (SMALL LEAK)
1. OUTLINE OF DIAGNOSIS
Check if there is a leakage in fuel system or not, and perform the function diagnosis of valve.
In this system diagnosis, check for leakage and valve function is conducted by changing the fuel tank pres-
sure and monitoring the pressure change using the fuel tank pressure sensor.
When in 0.04 inch diagnosis, perform in the order of mode Z → mode A → mode B → mode C and mode D;
When in 0.02 inch diagnosis, perform in the order of mode A → mode B → mode C → mode D and mode E.
(1) Fuel gauge (6) Canister (10) Fuel tank
(2) Intake manifold (7) Drain valve (11) Fuel cut valve
(3) Throttle body (8) Fuel temperature sensor (12) Fuel tank pressure sensor
(4) Purge control solenoid valve (9) Fuel level sensor (13) Vent valve
(5) Engine control module (ECM)
EN-03722
(1)(2)(3)
(4)
(5)
(6)
(8)
(12)
(9)(10)
(13)
(11)
(7)

GD(H6DO)-127
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
2. ENABLE CONDITIONS
0.04-inch Diagnosis
Secondary Parameters Enable Conditions
Battery voltage≥ 10.9 V
Barometric pressure≥ 75.1 kPa (563
mmHg, 22.2 inHg)
To t a l t i m e o f c a n i s t e r p u r g e o p e r a t i o n 1 2 0 s e c o n d s o r m o r e
After engine starting 851 seconds or more
Learning value of evaporation gas den-
sity
≤ 0.08
Engine speed 1050 ←→ 7000 rpm
Fuel tank pressure≥ –4.0 kPa (–30
mmHg, –1.18 inHg)
Intake manifold relative vacuum (relative
pressure)
< –26.7 kPa (–200
mmHg, –7.87 inHg)
Ve h i c l e s p e e d≥ 32 km/h (20 MPH)
Fuel level 9.6 ←→ 54.4 2 (2.53
←→ 14.37 US gal,
2.11 ←→ 12.00 Imp
gal)
Closed air/fuel ratio control In operation
Fuel temperature – 10 ←→ 45°C (14
←→ 113°F)
Intake air temperature≥ –10°C (14°F)
Pressure change per second < 0.23 kPa (1.7
mmHg, 0.023 inHg)
Minimum pressure change value every
one second – Maximum pressure
change value
< 0.23 kPa (1.7
mmHg, 0.023 inHg)
Change of fuel level < 2 2 (2.1 US qt, 1.76
Imp qt)/131 millisec-
onds
Air fuel ratio 0.76 — 1.25

GD(H6DO)-128
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
0.02-inch Diagnosis
Secondary Parameters Enable Conditions
(At starting a diagnosis)
Evap. diagnosis Incomplete
Battery voltage≥ 10.9 V
Atmospheric pressure≥ 75.1 kPa (563
mmHg, 22.2 inHg)
Time since last incomplete diagnosis
event of 0.02-inch leakage
> 600 seconds (Can-
celed with the mode
other than mode A)
> 120 seconds (Can-
celed with mode A)
To t a l t i m e o f c a n i s t e r p u r g e o p e r a t i o n 1 2 0 s e c o n d s o r m o r e
After engine starting 120 seconds or more
Fuel temp. –10 ←→ 50°C (14
←→ 122°F)
Fuel level 9.6 ←→ 54.4 2
(2.54 ←→ 14.37 US
gal, 2.11 ←→ 12.00
Imp gal)
Intake manifold relative vacuum (relative
pressure)
< –8.0 kPa (–60
mmHg, –2.36 inHg)
Fuel tank pressure –0.53 — 0.39 kPa (–4
— 2.9 mmHg, –0.16 —
0.12 inHg)
Ve h i c l e s p e e d≥ 30 km/h (62 MPH)
Closed air/fuel ratio control In operation
Engine speed 500 — 7000 rpm
(During diagnosis)
Change of fuel level≤ 5 2 (1.3 US qt, 1.1
Imp qt)
Pressure change every one second < 0.04 kPa (0.3
mmHg, 0.01 inHg)
Minimum pressure change value every
one second – Maximum pressure
change value every one second (Mode
A)
< 0.06 kPa (0.45
mmHg, 0.018 inHg)
Minimum pressure change value every
one second – Maximum pressure
change value every one second (Mode
D)
< 0.08 kPa (0.564
mmHg, 0.024 inHg)
Atmospheric pressure change (Mode D) –0.47 ←→ 0.32 kPa (–
3.5 ←→ 2.4 mmHg, –
0.14 ←→ 0.09 inHg)
Atmospheric pressure change (Mode E) –0.32 ←→ 0.32 kPa (–
2.4 ←→ 2.4 mmHg, –
0.09 ←→ 0.09 inHg)

GD(H6DO)-129
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
3. GENERAL DRIVING CYCLE
0.04-inch Diagnosis
Perform the diagnosis only once in 851 seconds or more after starting the engine, at a constant speed of 32
km/h (20 MPH) or more.
Pay attention to the fuel temperature and fuel level.
0.02-inch Diagnosis
Perform the diagnosis after 120 seconds or more after starting the engine, at a constant engine RPM of 30
km/h (19 MPH) or higher, to judge as NG or OK.
If OK/NG judgment is not possible, repeat the diagnosis.
Pay attention to the fuel temperature and fuel level.
4. DIAGNOSTIC METHOD
0.04-inch Diagnosis
Mode Z: (Purge control solenoid valve opening failure diagnosis)
When performing the leakage diagnosis of the EVAP system, the purge control solenoid valve must operate
properly. Therefore, mode Z is used to diagnose a stuck open condition of the purge control solenoid valve
by monitoring the tank pressure.
Note that if a purge control solenoid valve stuck open fault is detected, the EVAP system leakage diagnosis
is cancelled.
Purge Control Solenoid Valve Stuck Open Diagnosis
DTC
P0457 Evaporative Emission Control System Leak Detected (Fuel Cap Loose/Off)
Diagnostic method
Purge control solenoid valve stuck open diagnosis is performed in mode Z as shown in the figure below.
(1) Engine (4) Drain valve (6) Fuel tank pressure sensor
(2) Purge control solenoid valve (5) Fuel tank
(3) Canister
EN-03723
(2)
(1)(3)
(4)
(5)
(6)

GD(H6DO)-136
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CD:DTC P0447 EVAPORATIVE EMISSION CONTROL SYSTEM VENT CONTROL
CIRCUIT OPEN
1. OUTLINE OF DIAGNOSIS
Detect open or short circuit of the drain valve.
Judge as NG when the ECM output level differs from the actual terminal level.
2. COMPONENT DESCRIPTION
The drain valve adjusts the pressure in the canister by introducing/extracting air when pressure differences
occur in the canister with the atmospheric pressure.
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the continuous time of completing the malfunction criteria below becomes more than 2.5
seconds.
Time Needed for Diagnosis: 2.5 seconds
Malfunction Indicator Light: Illuminates as soon as a malfunction occurs.
Normality Judgment
Judge as OK and clear the NG when the malfunction criteria below are met.
6. DTC CLEAR CONDITION
•When the OK idling cycle is completed 40 times in a row
•When “Clear Memory” is performed
Secondary Parameters Enable Conditions
None
Judgment Value
Malfunction Criteria Threshold Value
Ignition switch ON
Battery voltage≥ 10.9 V
After engine starting 1 second or more
Te r m i n a l o u t p u t v o l t a g e w h e n E C M o u t -
puts OFF signal
Low
Judgment Value
Malfunction Criteria Threshold Value
Ignition switch ON
Battery voltage≥ 10.9 V
After engine starting 1 second or more
Te r m i n a l o u t p u t v o l t a g e w h e n E C M o u t -
puts OFF signal
High

GD(H6DO)-138
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CE:DTC P0448 EVAPORATIVE EMISSION CONTROL SYSTEM VENT CONTROL
CIRCUIT SHORTED
1. OUTLINE OF DIAGNOSIS
Detect open or short circuit of the drain valve.
Judge as NG when the ECM output level differs from the actual terminal level.
2. COMPONENT DESCRIPTION
The drain valve adjusts the pressure in the canister by introducing/extracting air when pressure differences
occur in the canister with the atmospheric pressure.
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the continuous time of completing the malfunction criteria below becomes more than 2.5
seconds.
Time Needed for Diagnosis: 2.5 seconds
Malfunction Indicator Light: Illuminates as soon as a malfunction occurs.
Normality Judgment
Judge as OK and clear the NG when the malfunction criteria below are met.
6. DTC CLEAR CONDITION
•When the OK idling cycle is completed 40 times in a row
•When “Clear Memory” is performed
Secondary Parameters Enable Conditions
None
Judgment Value
Malfunction Criteria Threshold Value
Ignition switch ON
Battery voltage≥ 10.9 V
After engine starting 1 second or more
Te r m i n a l o u t p u t v o l t a g e w h e n E C M o u t -
puts OFF signal
High
Judgment Value
Malfunction Criteria Threshold Value
Ignition switch ON
Battery voltage≥ 10.9 V
After engine starting 1 second or more
Te r m i n a l o u t p u t v o l t a g e w h e n E C M o u t -
puts OFF signal
Low

GD(H6DO)-140
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CF:DTC P0451 EVAPORATIVE EMISSION CONTROL SYSTEM PRESSURE
SENSOR
1. OUTLINE OF DIAGNOSIS
Detect the tank pressure sensor output property abnormality.
Judge NG when there is no pressure variation, which should exist in the tank, considering the engine status.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
•Always perform the diagnosis continuously in 60 seconds after starting the engine.
•Be sure to check the fuel level and fuel temperature.
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the malfunction criteria below are met.
(A) Output voltage (C) To fuel tank (D) To atmosphere
(B) Input voltage

(1) Connector (2) Terminals
Secondary Parameters Enable Conditions
After engine starting 60 seconds or more
Fuel level≥ 9.6 2 (2.45 US gal,
2.11 Imp gal)
Fuel temperature < 35°C (95°F)
Battery voltage≥ 10.9 V
Atmospheric pressure > 75.1 kPa (563
mmHg, 22.2 inHg)
Engine speed < 7000 rpm
EN-03141
(A)
(B)
(2)(1)
(D)
(C)

GD(H6DO)-147
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CK:DTC P0458 EVAPORATIVE EMISSION CONTROL SYSTEM PURGE CON-
TROL VALVE CIRCUIT LOW
1. OUTLINE OF DIAGNOSIS
Detect open or short circuit of the purge control solenoid valve.
Judge as NG when the ECM output level differs from the actual terminal level.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Always perform the diagnosis after starting the engine.
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the continuous time until completing the malfunction criteria below becomes more than
time needed for diagnosis (2.5 seconds).
Time Needed for Diagnosis: 2.5 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cy-
cles.
(A) To canister (B) To intake manifold
Secondary Parameters Enable Conditions
Ignition switch ON
Battery voltage≥ 10.9 V
After engine starting 1 second or more
Judgment Value
Malfunction Criteria Threshold Value
Duty ratio of “ON” < 75%
Te r m i n a l o u t p u t v o l t a g e L o w
EN-02197
( A )( B )