2009 SUBARU TRIBECA engine coolant

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)-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)-87
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
BE:DTC P0181 FUEL TEMPERATURE SENSOR “A” CIRCUIT RANGE/PERFOR-
MANCE
1. OUTLINE OF DIAGNOSIS
Detect faults in the fuel temperature sensor output properties.
Diagnosis is performed in two methods; drift diagnosis and stuck diagnosis. If either is NG, judge as NG. If
both are OK, Judge as OK and clear the NG.
Drift Diagnosis
Normally fuel temperature is lower than engine coolant temperature. When the fuel temperature becomes
higher than the engine coolant temperature, the range is considered to be shifted, and judged as NG.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(A) Resistance value (Ω)(B)Fuel temperature °C (°F)
Secondary Parameters Enable Conditions
None
EN-01700
(A)
(B)

GD(H6DO)-88
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 120 second
or more.
Time Needed for Diagnosis: 120 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.
Stuck Diagnosis
As the engine warms up (cumulative amount of intake air after starting is large), if the fuel temperature which
should rise does not, determine as being stuck and NG.
6. ENABLE CONDITIONS
7. GENERAL DRIVING CYCLE
Always perform diagnosis continuously.
Judgment Value
Malfunction Criteria Threshold Value
Fuel level≥ 9.6 2 (25.4 US gal,
2.11 Imp gal)
After engine starting 20 seconds or more
Engine coolant temperature - engine
coolant temperature at engine starting
> 10°C (50°F)
Fuel temperature – Engine coolant tem-
perature
≥ 10°C (50°F)
Battery voltage > 10.9 V
Judgment Value
Malfunction Criteria Threshold Value
Fuel level≥ 9.6 2 (25.4 US gal,
2.11 Imp gal)
After engine starting 20 seconds or more
Engine coolant temperature - engine
coolant temperature at engine starting
> 10°C (50°F)
Fuel temperature – Engine coolant tem-
perature
< 10°C (50°F)
Battery voltage > 10.9 V
Engine coolant temperature < 75°C (167°F)
Secondary Parameters Enable Conditions
After engine starting 20 seconds or more
Battery voltage > 10.9 V

GD(H6DO)-94
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
BH:DTC P0196 ENGINE OIL TEMPERATURE SENSOR CIRCUIT RANGE/PER-
FORMANCE
1. OUTLINE OF DIAGNOSIS
Detect for abnormal values in the oil temperature sensor output properties.
Judge as NG when the oil temperature does not rise even though the engine is running under a condition
where it should rise.
2. ENABLE CONDITIONS
3. GENERAL DRIVING CYCLE
Perform the diagnosis continuously after starting the engine.
4. DIAGNOSTIC METHOD
Abnormality Judgment
When the following conditions are established, it is NG.
After engine start oil temperature sensor characteristic diagnosis timer (timer for diagnosis).
a. Timer stop at fuel cut.
b. During the driving conditions except a) above, timer count up by
64 milliseconds + TCILCNT milliseconds at every 64 milliseconds.
Where, TOILCNT is determined as follows,
TOILCNT = 0 at idle switch ON
For TOILCNT at Idle switch off, refer to the following table.
After engine start oil temperature characteristic diagnosis timer judgment value (t).
t = 2400000 – 60000 × Ti (t ≥ 2400000)
Ti = The lowest coolant temperature after starting the engine.
Time Needed for Diagnosis: Undecided
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cy-
cles.
Secondary Parameters Enable Conditions
Battery voltage≥ 10.9 V
Engine speed 500 rpm
Judgment Value
Malfunction Criteria Threshold Value
Engine oil temperature < 15°C (59°F)
After engine start oil temperature sensor
characteristic diagnosis timer.
≥ Judgment value for after engine
start oil temperature sensor char-
acteristic diagnosis timer
Vehicle speed km/h (MPH)
0 (0) 8 (5) 16 (10) 24 (15) 32 (20) 40 (25) 48 (30) 56 (35)
Te m p e r a -
ture
°C (°F)
–40 (–40) 0 ms 32 ms 76 ms 130 ms 149 ms 171 ms 176 ms 181 ms
–30 (–22) 67 ms 93 ms 121 ms 157 ms 170 ms 184 ms 193 ms 203 ms
–20 (–4) 98 ms 123 ms 148 ms 184 ms 193 ms 204 ms 214 ms 226 ms
–10 (14) 145 ms 166 ms 187 ms 208 ms 223 ms 239 ms 242 ms 245 ms
0 (32) 161 ms 187 ms 212 ms 243 ms 252 ms 262 ms 266 ms 270 ms

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)-160
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CQ:DTC P0483 COOLING FAN RATIONALITY CHECK
1. OUTLINE OF DIAGNOSIS
Detect the function abnormality of the radiator fan.
Judge as NG when the engine coolant temperature slowly decreases even when the radiator fan is rotating.
2. ENABLE CONDITIONS
Diagnostic enable condition is established if the radiator fan changes from OFF → ON when all of the con-
ditions below are met.
When one of the conditions below is not met, the diagnostic enable condition is not established.
3. GENERAL DRIVING CYCLE
Perform the diagnosis continuously when the radiator fan changes from OFF → ON when idling.
4. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the continuous time of completing the malfunction criteria below becomes more than 5
minutes.
Time Needed for Diagnosis: 5 minutes
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.
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)
Secondary Parameters Enable Conditions
Engine speed 500 — 900 rpm
Idle switch ON
Ve h i c l e s p e e d < 2 k m / h ( 1 M P H )
Battery voltage≥ 10.9 V
Judgment Value
Malfunction Criteria Threshold Value
Engine coolant temperature≥ 102°C (216°F)
Engine coolant temperature Does not decrease
Judgment Value
Malfunction Criteria Threshold Value
Engine coolant temperature Decreases