2009 SUBARU TRIBECA engine coolant

GD(H6DO)-51
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
•Engine coolant temperature sensor process: Engine coolant temperature is fixed at 70°C (158°F).
•ISC Feedback: Calculate target engine RPM as engine coolant temperature 70°C (158°F).
•ISC learning: Not allowed to learn.
•Air conditioner control: Not allowed to turn the air conditioner to ON.
•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)-56
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AH:DTC P0125 INSUFFICIENT COOLANT TEMPERATURE FOR CLOSED LOOP
FUEL CONTROL
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of engine coolant temperature output property.
Judge as NG when the engine coolant temperature does not rise in driving conditions where it should.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Perform the diagnosis only once after engine start.
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the malfunction criteria below are met.
(A) Resistance value (Ω) (B) Temperature °C (°F)

(1) Connector (2) Thermistor element
Secondary Parameters Enable Conditions
Engine speed≥ 500 rpm
Battery voltage > 10.9 V
Judgment Value
Malfunction Criteria Threshold Value
Engine coolant temperature < 20°C (68°F)
Timer for diagnosis after engine star t≥ Judgment value of
timer after engine start
EN-02917
(A)
(2)
(1)
(B)

GD(H6DO)-57
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Timer for diagnosis after engine start
a. Timer stop at fuel cut.
b. During the driving conditions except a) above, timer count up by
64 milliseconds + TWCNT milliseconds at every 64 milliseconds.
TWCNT is defined as follows,
TWCNT = 0 at idle switch ON,
TWCNT show on the following table at idle switch OFF.
Judgment value of timer after engine starting
t = 429.5 – 28.605 × Ti
Ti is the lowest coolant temperature after starting the engine.
Time Needed for Diagnosis: To be determined. (It is varied by the Min. engine coolant temperature and en-
gine conditions such as vehicle speed and engine coolant temperature.)
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
•Engine coolant temperature sensor process: Engine coolant temperature is fixed at 70°C (158°F).
•ISC Feedback: Calculate target engine RPM as engine coolant temperature 70°C (158°F).
•ISC learning: Not allowed to learn.
•Air conditioner control: Not allowed to turn the air conditioner to ON.
•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)
Te m p e r a t u r e
°C (°F)
Ve h i c l e s p e e d k m / h ( M P H )
0 (0) 8 (4.97) 16 (9.94) 24 (14.9) 32 (19.9) 40 (24.9) 48 (29.8) 56 (34.8)
–20 (–4) 0 ms 37.2 ms 74.3 ms 111.4 ms 126.7 ms 141.9 ms 163.6 ms 185.3 ms
–10 (14) 0 ms 27.4 ms 54.8 ms 82.2 ms 99.7 ms 117.1 ms 136.0 ms 154.8 ms
0 (32) 0 ms 17.6 ms 35.3 ms 52.9 ms 72.6 ms 92.3 ms 108.3 ms 124.3 ms
10 (50) 0 ms 7.9 ms 15.8 ms 23.7 ms 45.6 ms 67.6 ms 80.7 ms 93.9 ms
20 (68) 0 ms 7.9 ms 15.8 ms 23.7 ms 45.6 ms 67.6 ms 80.7 ms 93.9 ms
Judgment Value
Malfunction Criteria Threshold Value
Engine coolant temperature≥ 20°C (68°F)

GD(H6DO)-58
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AI: DTC P0126 INSUFFICIENT COOLANT TEMPERATURE FOR STABLE OPER-
ATION
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of engine coolant temperature sensor characteristics.
The engine coolant temperature and fuel temperature is stored in memory from the last time that the engine
was stopped. If the engine coolant temperature does not decrease when it is expected to after starting the
engine, it is judged to be NG.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Perform the diagnosis only once after starting the engine.
(A) Resistance value (kΩ)(B)Temperature °C (°F)

(1) Connector (2) Thermistor element
Secondary Parameters Enable Conditions
Battery voltage≥ 10.9 V
Fuel fill from last time engine was
stopped to starting the engine this time
OFF
Fuel level≥ 15 2
Engine coolant temperature at last time
engine was stopped
≥ 75°C (167°F)
and
< 95°C (203°F)
EN-02917
(A)
(2)
(1)
(B)

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)-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)