SUBARU TRIBECA 2009 1.G Service Workshop Manual

GD(H6DO)-59
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG if the continuous time when the following conditions are established is higher than 2.5 seconds.
Normality Judgment
When the following conditions are established, it is OK.
Time Needed for Diagnosis: 2.5 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cy-
cles.
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
None
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
Judgment Value
Malfunction Criteria Threshold Value
Engine coolant temperature the last time
engine was stopped— Lowest engine
coolant temperature after starting engine
< 2.5°C (36.5°F)
Fuel temperature at last time engine was
stopped — Fuel temperature
≥ 5°C (41°F)
Intake temperature — Fuel temperature < 2.5°C (36.5°F)
Fuel temperature < 35°C (95°F)
Judgment Value
Malfunction Criteria Threshold Value
Engine coolant temperature the last time
engine was stopped— Lowest engine
coolant temperature after starting engine
≥ 2.5°C (36.5°F)

GD(H6DO)-60
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AJ:DTC P0128 COOLANT THERMOSTAT (COOLANT TEMPERATURE BELOW
THERMOSTAT REGULATING TEMPERATURE)
1. OUTLINE OF DIAGNOSIS
Detect malfunctions of the thermostat.
Judge as NG when the engine coolant temperature is lower than the estimated engine coolant temperature
and the difference between them is large. Judge as OK when the engine coolant temperature becomes to
75°C (167°F), and the difference is small, before judging NG.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(1) Valve (4) Piston (7) Stop ring
(2) Spring (5) Guide (8) Wax element
(3) Stopper (6) Rubber packing (9) Jiggle valve
Secondary Parameters Enable Conditions
None
EN-01692
(9)
(2)
(6)
(8)
(7)
(5)
(4)
(3)
(1)
(2)

GD(H6DO)-61
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the continuous time until completing the malfunction criteria below becomes 23 second
or more.
Time Needed for Diagnosis: 23 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cy-
cles.
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
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
None
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
Judgment Value
Malfunction Criteria Threshold Value
Battery voltage≥ 10.9 V
Estimate ambient temperature≥ –7°C (19.4°F)
Thermostat malfunction diagnosis Incomplete
Engine coolant temperature at engine
starting
< 55°C (131°F)
Estimated coolant temperature≥ 75°C (167°F)
Engine coolant temperature≤ 75°C (167°F)
(Estimated – measured) coolant temper-
ature
> 20°C (68°F)
Ve h i c l e s p e e d≥ 20 km/h (12 MPH)
Judgment Value
Malfunction Criteria Threshold Value
Battery voltage≥ 10.9 V
Estimate ambient temperature≥ –7°C (19.4°F)
Thermostat malfunction diagnosis Incomplete
Engine coolant temperature at engine
starting
< 55°C (131°F)
Engine coolant temperature≥ 75°C (167°F)
(Estimated – measured) coolant temper-
ature
≤ 20°C (68°F)

GD(H6DO)-62
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AK:DTC P0131 O2 SENSOR CIRCUIT LOW VOLTAGE (BANK 1 SENSOR 1)
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of sensor.
Judge as NG when the element impressed voltage is out of range, or the element current is out of range.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
5. DIAGNOSTIC METHOD
Judge as NG when the continuous time of completing any malfunction criteria below is more than 1 second.
Time Needed for Diagnosis: 1 second
Malfunction Indicator Light: Illuminates as soon as a malfunction occurs.
6. DTC CLEAR CONDITION
•When the OK idling cycle is completed 40 times in a row
•When “Clear Memory” is performed
(A) Electromotive force (C) Lean (D) Rich
(B) Air fuel ratio

(1) Atmosphere (3) ZrO2(4) Ceramic heater
(2) Exhaust gas
Secondary Parameters Enable Conditions
Vo l t a g e≥ 10.9 V
Judgment Value
Malfunction Criteria Threshold Value
Input voltage < 1.8 V
Input current < –0.005 A
(1)
(2)
(4)
(2)
(3)
EN-01693
(C) (B) (D)
(A)

GD(H6DO)-63
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 “Clear Memory” is performed
8. FAIL SAFE
•Front oxygen (A/F) sensor heater control: Prohibit heater continuity.
•A/F main learning: Not allowed to calculate the A/F main learning compensation factor.
•A/F sub learning: Not allowed to calculate the A/F sub learning compensation factor.
•Purge control: Not allowed to purge
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)

GD(H6DO)-64
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AL:DTC P0132 O2 SENSOR CIRCUIT HIGH VOLTAGE (BANK 1 SENSOR 1)
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of sensor.
Judge as NG when the element impressed voltage is out of range, or the element current is out of range.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
5. DIAGNOSTIC METHOD
Judge as NG when the continuous time of completing any malfunction criteria below is more than 1 second.
Time Needed for Diagnosis: 1 second
Malfunction Indicator Light: Illuminates as soon as a malfunction occurs.
6. DTC CLEAR CONDITION
•When the OK idling cycle is completed 40 times in a row
•When “Clear Memory” is performed
(A) Electromotive force (C) Lean (D) Rich
(B) Air fuel ratio

(1) Atmosphere (3) ZrO2(4) Ceramic heater
(2) Exhaust gas
Secondary Parameters Enable Conditions
Vo l t a g e≥ 10.9 V
Judgment Value
Malfunction Criteria Threshold Value
Input voltage≥ 3.8 V
Input current≥ 0.005 A
(1)
(2)
(4)
(2)
(3)
EN-01693
(C) (B) (D)
(A)

GD(H6DO)-65
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 “Clear Memory” is performed
8. FAIL SAFE
•Front oxygen (A/F) sensor heater control: Prohibit heater continuity.
•A/F main learning: Not allowed to calculate the A/F main learning compensation factor.
•A/F sub learning: Not allowed to calculate the A/F sub learning compensation factor.
•Purge control: Not allowed to purge
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)

GD(H6DO)-66
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AM:DTC P0133 O2 SENSOR CIRCUIT SLOW RESPONSE (BANK 1 SENSOR 1)
1. OUTLINE OF DIAGNOSIS
Detect the slow response of front oxygen (A/F) sensor.
Front oxygen (A/F) sensor cover has some ventilation holes for exhaust gas. Clogged ventilation holes are
diagnosed.
Clogged ventilation holes are diagnosed. When the holes are clogged, the A/F output variation becomes
slow comparing with the actual A/F variation because oxygen which reaches the zirconia layer is insufficient.
Therefore, if the sensor cover holes are clogged, the rich to lean judgment in the ECM is delayed when the
change from rich to lean occurs.
Judge as NG when the actual movement in comparison to the ECM control amount is slow.
(1) Cover (2) Zirconia (3) Clogging
EN-01694
(1)
(2)(3)

GD(H6DO)-67
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Perform diagnosis only once at a constant speed of 10 to 120 km/h (6.21 to 74.6 MPH) 60 seconds or more
after starting the engine.
(A) Electromotive force (C) Lean (D) Rich
(B) Air fuel ratio

(1) Atmosphere (3) ZrO2(4) Ceramic heater
(2) Exhaust gas
Secondary Parameters Enable Conditions
All secondary parameters enable condi-
tions
1 second or more
Battery voltage > 10.9 V
Atmospheric pressure > 75.1 kPa (563
mmHg, 22.2 inHg)
Closed loop control with main feedback OPERATION
Fr o nt ox yg e n ( A / F) s en so r im pe d an c e 0 ←→ 50 Ω
After engine starting 120 seconds or more
Engine coolant temperature≥ 75°C (167°F)
Engine speed 1000 ←→ 2500 rpm
Ve h i c l e S p e e d 1 0 ←→ 120 km/h
(6.21 ←→ 74.6 MPH)
Intake Air Flow 10 ←→ 40 g/s
Engine load < 0.02 g/rev
Learning value of EVAP conc. during
purge
≤ 0.12
To t a l t i m e o f o p e r a t i n g c a n i s t e r p u r g e 2 0 s e c o n d s o r m o r e
(1)
(2)
(4)
(2)
(3)
EN-01693
(C) (B) (D)
(A)

GD(H6DO)-68
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
5. DIAGNOSTIC METHOD
Calculate faf difference every 128 milliseconds, and the λvalue difference. Calculate the diagnosis value af-
ter calculating 1,640 times (210 seconds).
Judge as NG when the malfunction criteria below are completed. Judge as OK and clear the NG when the
malfunction criteria below are not met.
Time Needed for Diagnosis: 210 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cy-
cles.
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
•Front oxygen (A/F) sensor main learning compensation: Not allowed to calculate.
•Rear oxygen sensor sub learning compensation: Not allowed to calculate.
•Purge control: Not allowed to purge
9. 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
parafca = td2faf/td2lmd≥ 0.25
where,
td2faf (N) = td2faf (n–1) + |d2faf (n)|
td2lmd (N) = td2lmd (n–1) + |d2lmd (n)|
add up for a total of 300 seconds
d2faf (n) = (faf (n) – faf (n–1)) – (faf (n–1)
– faf (n–2))

d2lmd (n) = (lmd (n) – lmd (n–1)) – (lmd
(n–1) – lmd (n–2))

faf = main feedback compensation coef-
ficient every 128 milliseconds

lmd = output lambda every 128 millisec-
onds