2009 SUBARU TRIBECA g sensor

GD(H6DO)-21
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
J: DTC P0037 HO2S HEATER CONTROL CIRCUIT LOW (BANK 1 SENSOR 2)
1. OUTLINE OF DIAGNOSIS
Detect the rear oxygen sensor heater open or short circuit.
The rear oxygen sensor heater performs duty control, and the output terminal voltage at ON is 0 V, and the
output terminal voltage at OFF is the battery voltage.
Judge NG when the terminal voltage remains Low.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously after starting the engine.
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge NG when the continuous time until completing all the malfunction criteria below becomes more than
2560 seconds.
Time Needed for Diagnosis: 2.56 second
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cy-
cles.
(A) Battery voltage (C) 256 milliseconds (cycles) (D) Low error
(B) Rear oxygen (A/F) sensor heater
output voltage

Secondary Parameters Enable Conditions
Battery voltage > 10.9 V
Judgment Value
Malfunction Criteria Threshold Value
Output voltage level Low
Rear oxygen sensor heater control duty < 75%
EN-01792
(C)
(A)
(B)
ON
OFF
0V(D)

GD(H6DO)-23
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
K: DTC P0038 HO2S HEATER CONTROL CIRCUIT HIGH (BANK 1 SENSOR 2)
1. OUTLINE OF DIAGNOSIS
Detect the rear oxygen sensor heater open or short circuit.
The rear oxygen sensor heater performs duty control, and the output terminal voltage at ON is 0 V, and the
output terminal voltage at OFF is the battery voltage.
Judge NG when the terminal voltage remains High.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously after starting the engine.
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge NG when the continuous time until completing all the malfunction criteria below becomes more than
2560 seconds.
Time Needed for Diagnosis: 2.56 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cy-
cles.
(A) Battery voltage (C) 256 milliseconds (cycles) (D) High malfunction
(B) Rear oxygen (A/F) sensor heater
output voltage

Secondary Parameters Enable Conditions
Battery voltage > 10.9 V
Judgment Value
Malfunction Criteria Threshold Value
Output voltage level High
Rear oxygen sensor heater control duty≥ 15%
EN-01793
(C)
(A)
(B)
ON
OFF
0V
(D)

GD(H6DO)-25
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
L: DTC P0050 HO2S HEATER CONTROL CIRCUIT (BANK 2 SENSOR 1)
1. OUTLINE OF DIAGNOSIS
NOTE:
For the diagnostic procedure, refer to DTC P0030. CONTROL CIRCUIT (BANK 1 SENSOR 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
M: DTC P0051 HO2S HEATER CONTROL CIRCUIT LOW (BANK 2 SENSOR 1)
1. OUTLINE OF DIAGNOSIS
NOTE:
For the diagnostic procedure, refer to DTC P0031. CONTROL CIRCUIT LOW (BANK 1 SENSOR 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
N: DTC P0052 HO2S HEATER CONTROL CIRCUIT HIGH (BANK 2 SENSOR 1)
1. OUTLINE OF DIAGNOSIS
NOTE:
For the diagnostic procedure, refer to DTC P0032. CONTROL CIRCUIT HIGH (BANK 1 SENSOR 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
O: DTC P0057 HO2S HEATER CONTROL CIRCUIT LOW (BANK 2 SENSOR 2)
1. OUTLINE OF DIAGNOSIS
NOTE:
For the diagnostic procedure, refer to DTC P0037. CONTROL CIRCUIT LOW (BANK 1 SENSOR 2), Diagnostic Trouble Code (DTC) Detecting Criteria.>
P: DTC P0058 HO2S HEATER CONTROL CIRCUIT HIGH (BANK 2 SENSOR 2)
1. OUTLINE OF DIAGNOSIS
NOTE:
For the diagnostic procedure, refer to DTC P0038. CONTROL CIRCUIT HIGH (BANK 1 SENSOR 2), Diagnostic Trouble Code (DTC) Detecting Criteria.>

GD(H6DO)-26
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Q: DTC P0068 MAP/MAF - THROTTLE POSITION CORRELATION
1. OUTLINE OF DIAGNOSIS
Detect problems in the intake manifold pressure sensor output properties. Determining from the engine con-
dition, if the intake manifold pressure AD value is small even when operating conditions suggest it should be
large, or if the intake manifold pressure AD value is large even though the operating condition suggest it
should be small, this is judged as being NG.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously after idling.
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge NG when either Low side or High side becomes NG.
Judge as NG when the continuous time until completing the malfunction criteria below becomes more than
the predetermined time.
(A) Output voltage (B) Absolute pressure

(1) Connector (2) Terminals (3) O-ring
Secondary Parameters Enable Conditions
Engine coolant temperature≥ 75°C (167°F)
EN-01765
(B)
(A)
(2)
(3)
(1)

GD(H6DO)-27
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Time Needed for Diagnosis:
3 seconds (Low side)
10 seconds (High side)
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cy-
cles.
Normality Judgment
Judge as OK and clear the NG when both Low side and High side become OK.
Judge as OK when the malfunction criteria below are completed.
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
•Intake manifold pressure sensor process: Estimate the pressure from the engine RPM and size of the
throttle opening. When the throttle opening is also NG, fix at 101 kPa (760 mmHg, 29.8 inHg).
•ISC control: ISC feedback amount calculation prohibited
•Purge control: Not allowed to purge
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
Judgment Value
Malfunction Criteria Threshold Value
Low side
Engine speed < 2600 rpm
Throttle position≥ 17°
Output voltage < 1.99 V
Engine load > 0.87 g/rev
High side
Engine speed 500 ←→ 850 rpm
Throttle position < 3.5°
Output voltage≥ 2.71 V
Engine load < 0.6 g/rev
Judgment Value
Malfunction Criteria Threshold Value
Low side
Engine speed < 2600 rpm
Throttle position≥ 17°
Output voltage≥ 1.99 V
Engine load > 0.87 g/rev
High side
Engine speed 500 ←→ 850 rpm
Throttle position < 3.5°
Output voltage < 2.71 V
Engine load < 0.6 g/rev

GD(H6DO)-31
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
V: DTC P0101 MASS OR VOLUME AIR FLOW CIRCUIT RANGE/PERFOR-
MANCE
1. OUTLINE OF DIAGNOSIS
Detect for abnormalities in the air flow sensor output properties.
Judge as a low side NG when the air flow voltage indicates a small value regardless of running in a state
where the air flow voltage increases. Judge as a high side NG when the air flow voltage indicates a large val-
ue regardless of running in a state where the air flow voltage decreases. Judge air flow sensor property NG
when the Low side or High side becomes NG.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously after idling.
(A) Air

(1) Air flow sensor (3) Voltage (V) (4) Amount of intake air (kg/s)
(2) Intake air temperature sensor
Secondary Parameters Enable Conditions
Engine coolant temperature≥ 75°C (167°F)
EN-01766
(3)
(4)
(2)
(1)
(A)

GD(H6DO)-34
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
W: DTC P0102 MASS OR VOLUME AIR FLOW CIRCUIT LOW INPUT
1. OUTLINE OF DIAGNOSIS
Detect open or short circuits of the air flow sensor.
Judge as NG if it is out of specification.
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 until completing the malfunction criteria below becomes 0.5 second
or more. Judge as OK and clear the NG when the malfunction criteria below are not met.
Time Needed for Diagnosis: 0.5 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) Air

(1) Air flow sensor (3) Voltage (V) (4) Amount of intake air (kg (lb)/s)
(2) Intake air temperature sensor
Secondary Parameters Enable Conditions
None
Judgment Value
Malfunction Criteria Threshold Value
Output voltage≤ 0.2 V
EN-01766
(3)
(4)
(2)
(1)
(A)

GD(H6DO)-36
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
X: DTC P0103 MASS OR VOLUME AIR FLOW CIRCUIT HIGH INPUT
1. OUTLINE OF DIAGNOSIS
Detect open or short circuits of the air flow sensor.
Judge as NG if it is out of specification.
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 the following base value is higher than 0.5 second. Judge as OK
and clear the NG when the malfunction criteria below are not met.
Time Needed for Diagnosis: 0.5 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) Air

(1) Air flow sensor (3) Voltage (V) (4) Amount of intake air (kg (lb)/s)
(2) Intake air temperature sensor
Secondary Parameters Enable Conditions
None
Judgment Value
Malfunction Criteria Threshold Value
Output voltage≥ 4.985 V
EN-01766
(3)
(4)
(2)
(1)
(A)