2009 SUBARU TRIBECA Service Workshop Manual

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Page 1745 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual GD(H6DO)-133
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Time Needed for Diagnosis: 30 to 100 seconds
0.02-inch Diagnosis
DTC
P0456 Evaporative Emission Control System Leak D

GD(H6DO)-133
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Time Needed for Diagnosis: 30 to 100 seconds
0.02-inch Diagnosis
DTC
P0456 Evaporative Emission Control System Leak Detected (very small leak)
Diagnostic method
The diagnostic method consists of creating a sealed vacuum in the fuel tank and then determining the pres-
ence of leakage from the speed at which the tank internal pressure returns to atmospheric pressure.
Mode A: (0 Point Compensation)
When pressure in tank is high, wait for 0 point 0 kPa (Near 0 mmHg, 0 inHg) to return.Shift to mode B when
0 point returns.
Cancel the diagnosis when 0 point does not return in the specified time.
Mode B: (Negative pressure introduced)
Introduce negative pressure in the intake manifold to the tank.
Approx. 0 → –2.0 kPa (0 mmHg → –15 mmHg, 0 → –0.59 inHg)
When the pressure above (desired negative pressure) is reached, Mode C is entered.
Cancel the diagnosis when the targeted pressure in the tank is not reached.
Mode C: (Negative pressure maintained)
Stop the introduction of negative pressure and wait until the tank pressure returns to the start level of P2 cal-
culation.
Change to Mode D either when the tank pressure returns to the start level of P2 calculation, or when the pre-
determined amount of time has passed.
Mode D: (Calculate the amount of negative pressure change)
Monitor the tank pressure in mode D, calculate (P2) the pressure change in the tank, and measure the time
(evpdset) for the tank pressure to return when calculation of P2 is completed. Shift to mode E when pressure
returns. Make an advance OK judgment using the value of P2, or cancel, when the pressure in the tank does
not return after calculation of P2 is completed even when the predetermined amount of time has passed.
When the following conditions are established, it is OK.
Map 1 Failure diagnosis reference limit for 0.04 in leaks for evaporation diagnosis
Fuel temperature & Fuel level 25°C (77°F) 30°C (86°F) 35°C (95°F) 40°C (104°F) 45°C (113°F)
10 L (2.6 US gal, 2.2 Imp gal)
0.28 kPa
(2.1 mmHg,
0.083 inHg)
0.29 kPa
(2.2 mmHg,
0.087 inHg)
0.31 kPa
(2.3 mmHg,
0.090 inHg)
0.31 kPa
(2.35 mmHg,
0.092 inHg)
0.32 kPa
(2.4 mmHg,
0.094 inHg)
20 L (5.3 US gal, 4.4 Imp gal)
0.31 kPa
(2.3 mmHg,
0.091 inHg)
0.32 kPa
(2.4 mmHg,
0.094 inHg)
0.33 kPa
(2.5 mmHg,
0.098 inHg)
0.35 kPa
(2.6 mmHg,
0.102 inHg)
0.36 kPa
(2.7 mmHg,
0.106 inHg)
30 L (7.9 US gal, 6.6 Imp gal)
0.39 kPa
(2.9 mmHg,
0.114 inHg)
0.41 kPa
(3.05 mmHg,
0.120 inHg)
0.42 kPa
(3.15 mmHg,
0.124 inHg)
0.43 kPa
(3.25 mmHg,
0.128 inHg)
0.45 kPa
(3.35 mmHg,
0.134 inHg)
40 L (10.6 US gal, 8.8 Imp gal)
0.39 kPa
(2.9 mmHg,
0.114 inHg)
0.42 kPa
(3.15 mmHg,
0.124 inHg)
0.44 kPa
(3.3 mmHg,
0.130 inHg)
0.45 kPa
(3.4 mmHg,
0.134 inHg)
0.47 kPa
(3.5 mmHg,
0.138 inHg)
50 L (13.2 US gal, 11.0 Imp gal)
0.43 kPa
(3.2 mmHg,
0.126 inHg)
0.44 kPa
(3.3 mmHg,
0.130 inHg)
0.47 kPa
(3.5 mmHg,
0.138 inHg)
0.48 kPa
(3.6 mmHg,
0.142 inHg)
0.49 kPa
(3.7 mmHg,
0.146 inHg)
Judgment Value
Malfunction Criteria Threshold Value DTC
Advanced OK judgment 1 P0456
Mode D holding time≥ 30 s
Ta n k p r e s s u r e≤ Value of Map 2
Advanced OK judgment 2
Mode D Time≥ 200 s
P2≥ 0.9 — 1.3 kPa (7 — 9.6
mmHg, 0.28 — 0.38 inHg)

Page 1746 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual GD(H6DO)-134
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Mode E: (Evaporation occurrence amount calculation)
Calculate the change of tank pressure with the time evpdset to Jud

GD(H6DO)-134
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Mode E: (Evaporation occurrence amount calculation)
Calculate the change of tank pressure with the time evpdset to Judge as NG/OK according to the value of P1.
(ambiguous determination acceptable.)
Abnormality Judgment
When the following conditions are established, it is NG.
Map 2 Fuel level and corresponding tank pressure
Fuel level
10 L (2.6 US
gal, 2.2 Imp
gal)
20 L (5.3 US
gal, 4.4 Imp
gal)
30 L (7.9 US
gal, 6.6 Imp
gal)
40 L (10.6 US
gal, 8.8 Imp
gal)
50 L (13.2 US
gal, 11.0 Imp
gal)
Ta n k p r e s s u r e
–1.8 kPa
(–13.5 mmHg,
–0.53 inHg)
–1.77 kPa
(–13.3 mmHg,
–0.52 inHg)
–1.75 kPa
(–13.1 mmHg,
–0.52 inHg)
–1.67 kPa
(–12.5 mmHg,
–0.49 inHg)
–1.6 kPa
(–12 mmHg, –
0.47 inHg)
Judgment Value
Malfunction Criteria Threshold Value DTC
P1 < Value of Map 3
* Threshold value: Fig-
ure (Residual Fuel
Amount vs evpdset)
P0456
Map 3 Failure diagnosis reference limit for 0.02 in leaks for evaporative emission control system di-
agnosis
Time evpdset & Fuel level 0 seconds 50 seconds 65 seconds 120 seconds 150 seconds 200 seconds
10 L (2.6 US gal, 2.2 Imp gal)
0 kPa
(0 mmHg,
0 inHg)
0.19 kPa
(1.4 mmHg,
0.056 inHg)
0.25 kPa
(1.84 mmHg,
0.074 inHg)
0.25 kPa
(1.84 mmHg,
0.074 inHg)
0.25 kPa
(1.84 mmHg,
0.074 inHg)
0.25 kPa
(1.84 mmHg,
0.074 inHg)
20 L (5.3 US gal, 4.4 lmp gal)
0 kPa
(0 mmHg,
0 inHg)
0.21 kPa
(1.54 mmHg,
0.062 inHg)
0.23 kPa
(1.76 mmHg,
0.068 inHg)
0.23 kPa
(1.76 mmHg,
0.068 inHg)
0.23 kPa
(1.76 mmHg,
0.068 inHg)
0.23 kPa
(1.76 mmHg,
0.068 inHg)
30 L (7.9 US gal, 6.6 lmp gal)
0 kPa
(0 mmHg,
0 inHg)
0.22 kPa
(1.68 mmHg,
0.065 inHg)
0.22 kPa
(1.68 mmHg,
0.065 inHg)
0.22 kPa
(1.68 mmHg,
0.065 inHg)
0.22 kPa
(1.68 mmHg,
0.065 inHg)
0.22 kPa
(1.68 mmHg,
0.065 inHg)
40 L (10.6 US gal, 8.8 lmp
gal)
0 kPa
(0 mmHg,
0 inHg)
0.18 kPa
(1.315 mmHg,
0.053 inHg)
0.18 kPa
(1.315 mmHg,
0.053 inHg)
0.18 kPa
(1.315 mmHg,
0.053 inHg)
0.18 kPa
(1.315 mmHg,
0.053 inHg)
0.18 kPa
(1.315 mmHg,
0.053 inHg)
50 L (13.2 US gal, 11.0 lmp
gal)
0 kPa
(0 mmHg,
0 inHg)
0.13 kPa
(0.95 mmHg,
0.038 inHg)
0.13 kPa
(0.95 mmHg,
0.038 inHg)
0.13 kPa
(0.95 mmHg,
0.038 inHg)
0.13 kPa
(0.95 mmHg,
0.038 inHg)
0 kPa
(0 mmHg,
0 inHg)

Page 1747 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual GD(H6DO)-135
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Normality Judgment
When the following conditions are established, it is OK.
Time Needed for Diagnosis: 65 to 514 secon

GD(H6DO)-135
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Normality Judgment
When the following conditions are established, it is OK.
Time Needed for Diagnosis: 65 to 514 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cy-
cles.
5. DTC CLEAR CONDITION
•When the OK idling cycle is completed 40 times in a row
•When “Clear Memory” is performed
6. MALFUNCTION INDICATOR LIGHT CLEAR CONDITIONS
•When the OK driving cycle is completed 3 times in a row
•When “Clear Memory” is performed
7. FAIL SAFE
None
8. ECM OPERATION AT DTC SETTING
•Memorize the freeze frame data. (For test mode $02)
•Memorize the diagnostic value and trouble standard value. (For test mode $06)
Judgment Value
Malfunction Criteria Threshold Value DTC
P1 > Value of Map 4
* Threshold value: Figure
(Residual Fuel Amount
vs evpdset)
P0456
Map 4
Time evpdset & Fuel level 0 seconds 50 seconds 65 seconds 120 seconds 150 seconds 200 seconds
10 L (2.6 US gal, 2.2 Imp gal)
0.13 kPa
(1.0 mmHg,
0.039 inHg)
0.38 kPa
(2.88 mmHg,
0.112 inHg)
0.44 kPa
(3.28 mmHg,
0.13 inHg)
0.44 kPa
(3.28 mmHg,
0.13 inHg)
0.44 kPa
(3.28 mmHg,
0.13 inHg)
0.44 kPa
(3.28 mmHg,
0.13 inHg)
20 L (5.3 US gal, 4.4 lmp gal)
0.13 kPa
(1.0 mmHg,
0.039 inHg)
0.39 kPa
(2.91 mmHg,
0.1115 inHg)
0.41 kPa
(3.11 mmHg,
0.121 inHg)
0.41 kPa
(3.11 mmHg,
0.121 inHg)
0.41 kPa
(3.11 mmHg,
0.121 inHg)
0.41 kPa
(3.11 mmHg,
0.121 inHg)
30 L (7.9 US gal, 6.6 lmp gal)
0.13 kPa
(1.0 mmHg,
0.039 inHg)
0.39 kPa
(2.93 mmHg,
0.115 inHg)
0.39 kPa
(2.93 mmHg,
0.115 inHg)
0.39 kPa
(2.93 mmHg,
0.115 inHg)
0.39 kPa
(2.93 mmHg,
0.115 inHg)
0.39 kPa
(2.93 mmHg,
0.115 inHg)
40 L (10.6 US gal, 8.8 lmp gal)
0.13 kPa
(1.0 mmHg,
0.039 inHg)
0.37 kPa
(2.76 mmHg,
0.109 inHg)
0.37 kPa
(2.76 mmHg,
0.109 inHg)
0.37 kPa
(2.76 mmHg,
0.109 inHg)
0.37 kPa
(2.76 mmHg,
0.109 inHg)
0.37 kPa
(2.76 mmHg,
0.109 inHg)
50 L (13.2 US gal, 11.0 lmp gal)
0.13 kPa
(1.0 mmHg,
0.039 inHg)
0.34 kPa
(2.58 mmHg,
0.100 inHg)
0.34 kPa
(2.58 mmHg,
0.100 inHg)
0.34 kPa
(2.58 mmHg,
0.100 inHg)
0.34 kPa
(2.58 mmHg,
0.100 inHg)
0.34 kPa
(2.58 mmHg,
0.100 inHg)

Page 1748 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual 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 sho

Page 1749 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual GD(H6DO)-137
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITIONS
•When the OK driving cycle is completed 3 times in a row
•When “

Page 1750 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual 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

Page 1751 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual GD(H6DO)-139
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITIONS
•When the OK driving cycle is completed 3 times in a row
•When “

Page 1752 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual 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 sen

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