Back up SUBARU TRIBECA 2009 1.G Service Workshop Manual

GD(H6DO)-79
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Time Needed for Diagnosis: 1 time
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cy-
cles.
Normality Judgment
1) Regardless of a deceleration fuel cut, if the response time (diagnosis value) when the oxygen sensor volt-
age has changed from rich to lean is shorter than the threshold value (judgment value), judge as a normal
condition.
Response time (diagnosis value) ≤ threshold value → normal
2) Do not judge as a normal condition.
Judge as OK when the criteria below are met.
13.DTC CLEAR CONDITION
•When the OK idling cycle is completed 40 times in a row
•When “Clear Memory” is performed
14.MALFUNCTION INDICATOR LIGHT CLEAR CONDITIONS
•When the OK driving cycle is completed 3 times in a row
•When “Clear Memory” is performed
15.FAIL SAFE
Sub feedback control: Not allowed
16.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
Shortest time change from lean (300 mV
O2 output) to rich (500 mV) when volt-
age drops from 550 mV to 250 mV.
≤ 2 sec.

GD(H6DO)-80
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AR:DTC P0140 O2 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 1 SEN-
SOR 2)
1. OUTLINE OF DIAGNOSIS
Detect the rear oxygen sensor open or short circuit. Judge as NG when the rear oxygen sensor voltage can
be determined to be abnormal considering conditions such as intake air amount, engine coolant tempera-
ture, main feedback control and deceleration fuel cut.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION (USED ONLY FOR MALFUNCTION JUDGMENT)
4. GENERAL DRIVING CYCLE
Perform the diagnosis once after starting the engine.
(A) Electromotive force (C) Rich (E) Theoretical air fuel ratio
(B) Air fuel ratio (D) Lean (F) Comparative voltage

(1) Atmosphere (2) Exhaust gas (3) Electromotive force
Secondary Parameters Enable Conditions
Closed loop control at the rear oxygen
sensor
In operation
Ta r g e t o u t p u t v o l t a g e o f t h e r e a r o x y g e n
sensor
≥ 0.6 V
Amount of intake air≥ 10 g/second
Engine coolant temperature≥ 75°C (167°F)
Misfire detection every 200 rotations≤ 7 times
Compensation factor for front oxygen (A/
F) sensor with main feedback control
Not in limit value
Battery voltage with main feedback con-
trol
> 10.9 V
Deceleration fuel cut of 5 seconds or
more.
Experienced
EN-01696
(3)V(1)
(2) (2)
(E)
(F)
(C) (B) (D)
(A)

GD(H6DO)-81
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the malfunction criteria below are met.
Time Needed for Diagnosis: 200 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cy-
cles.
Normality Judgment
Judge as OK when the 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
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITIONS
•When the OK driving cycle is completed 3 times in a row
•When “Clear Memory” is performed
8. FAIL SAFE
Sub feedback control: Not allowed
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
AS:DTC P0151 O2 SENSOR CIRCUIT LOW VOLTAGE (BANK 2 SENSOR 1)
1. OUTLINE OF DIAGNOSIS
NOTE:
For the diagnostic procedure, refer to DTC P0131. CUIT LOW VOLTAGE (BANK 1 SENSOR 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
AT:DTC P0152 O2 SENSOR CIRCUIT HIGH VOLTAGE (BANK 2 SENSOR 1)
1. OUTLINE OF DIAGNOSIS
NOTE:
For the diagnostic procedure, refer to DTC P0132. CUIT HIGH VOLTAGE (BANK 1 SENSOR 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
AU:DTC P0153 O2 SENSOR CIRCUIT SLOW RESPONSE (BANK 2 SENSOR 1)
1. OUTLINE OF DIAGNOSIS
NOTE:
For the diagnostic procedure, refer to DTC P0133. CUIT SLOW RESPONSE (BANK 1 SENSOR 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
Judgment Value
Malfunction Criteria Threshold Value
Minimum output voltage > 250 mV
Maximum output voltage < 500 mV
Judgment Value
Malfunction Criteria Threshold Value
Diagnosis of the rear oxygen sensor volt-
age low side
Incomplete
Minimum output voltage≤ 250 mV
Maximum output voltage≥ 500 mV

GD(H6DO)-83
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
BA:DTC P0171 SYSTEM TOO LEAN (BANK 1)
1. OUTLINE OF DIAGNOSIS
Detect fuel system malfunction by the amount of main feedback control.
Diagnostic method
Fuel system is diagnosed by comparing the target air fuel ratio calculated by ECM with the actual air fuel ra-
tio measured by sensor.
2. ENABLE CONDITIONS
3. GENERAL DRIVING CYCLE
Perform the diagnosis continuously at idling or at a constant speed after warming up the engine.
4. DIAGNOSTIC METHOD
Abnormality Judgment
Compare the diagnosed value (fsobd) with the threshold value, and if a condition where the malfunction cri-
teria below are met continues for more than 50 seconds, judge that there is a fault in the fuel system.
Time Needed for Diagnosis: 10 seconds × 5 times
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cy-
cles.
Normality Judgment
Judge as OK when the malfunction criteria below are completed for 10 seconds or more.
Secondary Parameters Enable Conditions
A/F main learning system In operation
Engine coolant temperature≥ 75°C (167°F)
Engine load≤ 0.02 g/rev
Intake air flow≥ Map 5
Map 5
Engine RPM (rpm) idle 700 1000 1500 2000 2500 3000 3500 4000 4500 5000
Measured value (g(oz)/rev) NA0.357
(0.013)
0.25
(0.009)
0.25
(0.009)
0.317
(0.011)
0.326
(0.011)
0.337
(0.012)
0.397
(0.014)
0.439
(0.015)
0.454
(0.016)
0.454
(0.016)
Judgment Value
Malfunction Criteria Threshold Value
fsobd = (sglmd – tglmda) + faf + flaf≥ fsobdL1
In this case: sglmd = measured lambda,
tglmda = target lambda, faf = main feed-
back compensation coefficient (every 64
milliseconds), flaf = main feedback learn-
ing compensation coefficient
Refer to Map 4.
fsobdL1 = lean side
threshold value of
fsobd
Map 4 Threshold value for fuel system malfunction criteria
Amount of air (g(oz)/s) 0 (0)3.2
(0.113)
6.4
(0.226)
9.6
(0.339)
12.8
(0.451)
16
(0.564)
19.2
(0.677)
fsobdL1 (%) 40 40 33.2 26.5 26.5 26.5 26.5
Judgment Value
Malfunction Criteria Threshold Value
fsobd = (sglmd – tglmda) + faf + flaf < 19%

GD(H6DO)-85
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
BB:DTC P0172 SYSTEM TOO RICH (BANK 1)
1. OUTLINE OF DIAGNOSIS
Detect fuel system malfunction by the amount of main feedback control.
Diagnostic method
Fuel system is diagnosed by comparing the target air fuel ratio calculated by ECM with the actual air fuel ra-
tio measured by sensor.
2. ENABLE CONDITIONS
3. GENERAL DRIVING CYCLE
Perform the diagnosis continuously at idling or at a constant speed after warming up the engine.
4. DIAGNOSTIC METHOD
Abnormality Judgment
Compare the diagnosed value (fsobd) with the threshold value, and if a condition where the malfunction cri-
teria are met continues for more than 50 seconds, judge that there is a fault in the fuel system.
Time Needed for Diagnosis: 10 seconds × 5 times
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cy-
cles.
Normality Judgment
Judge as OK when the malfunction criteria below continues for 10 seconds.
5. DTC CLEAR CONDITION
•When the OK idling cycle is completed 40 times in a row
•When “Clear Memory” is performed
Secondary Parameters Enable Conditions
A/F main learning system In operation
Engine coolant temperature≥ 75°C (167°F)
Cumulative time of canister purge after
engine start
20 seconds or more
Continuous period after canister purge
starting
30 seconds or more
Intake manifold absolute pressure≥ Map 1
Judgment Value
Malfunction Criteria Threshold Value
fsobd = (sglmd – tglmda) + faf + flaf≤ fsobdR1
In this case: sglmd = measured lambda,
tglmda = target lambda, faf = main feed-
back compensation coefficient (every 64
milliseconds), flaf = main feedback learn-
ing compensation coefficient
Refer to Map 4.
fsobdR1 = rich side
threshold value of
fsobd
Map 4
Amount of air (g(oz)/s) 0 (0)3.2
(0.113)
6.4
(0.226)
9.6
(0.339)
12.8
(0.451)
16
(0.564)
19.2
(0.677)
fsobdR1 (%) –40 –40 –31.2 –26.5 –26.5 –26.5 26.5
Judgment Value
Malfunction Criteria Threshold Value
fsobd = (sglmd – tglmda) + faf + flaf≥ –20%

GD(H6DO)-122
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
3. ENABLE CONDITIONS
Map 2
Add the following value every 512 milliseconds.
4. GENERAL DRIVING CYCLE
Perform the diagnosis only once at a constant 70 km/h (43 MPH) or higher.
5. DIAGNOSTIC METHOD
After the execution criteria are established, calculate the output fluctuation value of front oxygen (A/F) sensor
(averaged for the right and left) and output fluctuation value of rear oxygen sensor. Calculate the diagnosis
value when the front oxygen (A/F) sensor output fluctuation value is more than specified value. A/F response
properties and diagnosis values are parameters for the judgment value.
Judge as NG when the malfunction criteria below are met. Judge as OK if the criteria below are not met.
Time Needed for Diagnosis: 30 to 55 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cy-
cles.
Secondary Parameters Enable Conditions
Battery voltage > 10.9 V
Atmospheric pressure > 75.1 kPa (563
mmHg, 22.2 inHg)
Engine coolant temperature≥ 75°C (167°F)
Catalyst warm-up counter (Map 2)≥ 8000
Misfire detection every 200 rotations < 5 times
Sub feedback In operation
Evaporative system diagnosis Not in operation
Time of difference (< 0.10) between
actual and target lambda
1000 milliseconds or
more
Ve h i c l e s p e e d≥ 70 km/h (43 MPH)
Amount of intake air 15 ←→ 50 g (0.53
←→ 1.76 oz)/s
Rear O2 output change from lower than
to higher than 600 mV
Experienced after fuel
cut
Load change absolute value < 0.02 g (0.007 oz)/rev
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≥ 5 sec.
Learning value of evaporation gas den-
sity
≤ 0.12
After engine starting≥ 205 sec.
Amount of intake
air (g(oz)/s)0 (0)3.2
(0.113)
6.4
(0.226)
9.6
(0.339)
12.8
(0.451)
16
(0.564)
19.2
(0.677)
22.4
(0.790)
25.6
(0.903)
28.8
(1.016)
32
(1.129)
35.2
(1.242)
To t a l v a l u e f o r
warm-up counter–19 –8 11 19 30 44 61 81 104 130 159 161
Judgment Value
Malfunction Criteria Threshold Value
Accumulated variation of output voltage
of rear oxygen sensor per 32 millisec-
onds × 4 divided by accumulated varia-
tion of lambda of front oxygen (A/F)
sensor per 32 milliseconds × 4
≥ 30

GD(H6DO)-144
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CH:DTC P0453 EVAPORATIVE EMISSION CONTROL SYSTEM PRESSURE
SENSOR HIGH INPUT
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of the fuel tank pressure sensor.
Judge as NG if it is out of specification.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Perform the diagnosis when purging.
(A) Output voltage (C) To fuel tank (D) To atmosphere
(B) Input voltage

(1) Connector (2) Terminals
Secondary Parameters Enable Conditions
Ve h i c l e s p e e d≥ 2 km/h (1.24 MPH)
All conditions of EVAP canister purge Completed
Learning value of evaporation gas con-
centration (left and right)
< 0.08
Main feedback compensation coefficient
(left and right)
≥ 0.9
Battery voltage≥ 10.9 V
EN-03141
(A)
(B)
(2)(1)
(D)
(C)

GD(H6DO)-162
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
8. FAIL SAFE
•ABS wheel speed sensor signal process: Vehicle speed = 10 km/h (6 MPH)
•ISC control: ISC feedback amount calculation prohibited
•Radiator fan control: Send the duty signal 50% to the controller.
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)

GD(H6DO)-163
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CS:DTC P0506 IDLE CONTROL SYSTEM RPM LOWER THAN EXPECTED
1. OUTLINE OF DIAGNOSIS
Detect the malfunction that actual engine rpm is not close to target engine rpm during idling. Judge as NG
when actual engine RPM is not close to target engine RPM during idling.
2. ENABLE CONDITIONS
3. GENERAL DRIVING CYCLE
Perform the diagnosis continuously at idling after warming up engine.
4. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the continuous time of completing the malfunction criterion below is 10 seconds × 3
times.
Time Needed for Diagnosis: 10 seconds × 3 times
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cy-
cles.
Normality Judgment
Judge as OK and clear NG when the continuous time of completing the malfunction criterion below becomes
more than the time needed for diagnosis (10 seconds).
5. DTC CLEAR CONDITION
•When the OK idling cycle is completed 40 times in a row
•When “Clear Memory” is performed
Secondary Parameters Enable Conditions
Engine coolant temperature≥ 75°C (167°F)
Battery voltage≥ 10.9V
Atmospheric pressure > 75.1 kPa (563
mmHg, 22.2 inHg)
Fuel level≥ 9.6 2 (2.54 US gal,
2.11 Imp gal)
After engine starting 10 seconds or more
Feedback in ISC In operation
Lambda value (left and right) 0.9 ←→ 1.1
After air condition switching ON-OFF,
OFF-ON
5.1 seconds or more
After intake manifold pressure changes
more than 4 kPa (30 mmHg, 1.2 inHg)
> 5.1 sec.
After neutral switch ON-OFF change > 5.1 sec.
Ve h i c l e s p e e d 0 k m / h ( 0 M P H )
Judgment Value
Malfunction Criteria Threshold Value
Actual - target engine RPM < –100 rpm
Feedback value for ISC Max.
Judgment Value
Malfunction Criteria Threshold Value
Actual - target engine RPM≥ –100 rpm

GD(H6DO)-165
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CT:DTC P0507 IDLE CONTROL SYSTEM RPM HIGHER THAN EXPECTED
1. OUTLINE OF DIAGNOSIS
Detect the malfunction that actual engine rpm is not close to target engine rpm during idling. Judge as NG
when actual engine RPM is not close to target engine RPM during idling.
2. ENABLE CONDITIONS
3. GENERAL DRIVING CYCLE
Perform the diagnosis continuously at idling after warming up engine.
4. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the continuous time of completing the malfunction criterion below is 10 seconds × 3
times.
Time Needed for Diagnosis: 10 seconds × 3 times
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cy-
cles.
Normality Judgment
Judge as OK and clear NG when the continuous time of completing the malfunction criterion below becomes
more than the time needed for diagnosis (10 seconds).
5. DTC CLEAR CONDITION
•When the OK idling cycle is completed 40 times in a row
•When “Clear Memory” is performed
Secondary Parameters Enable Conditions
Engine coolant temperature≥ 75°C (167°F)
Battery voltage≥ 10.9V
Atmospheric pressure > 75.1 kPa (563
mmHg, 22.2 inHg)
Fuel level≥ 9.6 2 (2.54 US gal,
2.11 Imp gal)
After engine starting 10 seconds or more
Feedback in ISC In operation
Lambda value (left and right) 0.9 ←→ 1.1
After air condition switching ON-OFF,
OFF-ON
5.1 seconds or more
After intake manifold pressure changes
to more than 4 kPa (30 mmHg, 1.2 inHg)
> 5.1 sec.
After neutral switch ON-OFF change > 5.1 sec.
Ve h i c l e s p e e d 0 k m / h ( 0 M P H )
Judgment Value
Malfunction Criteria Threshold Value
Actual – Target engine RPM≥ 200 rpm
Feedback value for ISC Min.
Judgment Value
Malfunction Criteria Threshold Value
Actual – Target engine RPM < 200 rpm