SUBARU TRIBECA 2009 1.G Service Workshop Manual

GD(H6DO)-9
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
2. Diagnostic Trouble Code (DTC) Detecting Criteria
A: DTC P0011 INTAKE CAMSHAFT POSITION TIMING - OVER-ADVANCED
(BANK 1)
1. OUTLINE OF DIAGNOSIS
Detect the AVCS system malfunction.
There are two types of diagnosis: Crankshaft cam timing diagnosis; and slow response diagnosis. Either of
these is performed according to the status of the engine while running.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
1. Crankshaft Timing Diagnosis
2. Slow Response Diagnosis
(1) AVCS timing controller (3) Engine control module (ECM) (5) Oil pressure
(2) Vane (4) Oil flow control solenoid valve
Secondary Parameters Enable Conditions
Battery voltage≥ 10.9 V
Engine coolant temperature > 50°C (122°F)
Ta r g e t t i m i n g a d v a n c e = 0 ° C A
Engine speed≥ 500 rpm
AV C S U n c o n t r o l l e d
Secondary Parameters Enable Conditions
All secondary parameters are executable.≥ 5000 ms
Battery voltage≥ 10.9 V
Engine coolant temperature > 50°C (122°F)
Amount of AVCS target timing advance≠ 0°CA
Engine speed≥ 1500 rpm
AV C S C o n t r o l l e d
Ta r g e t t i m i n g a d v a n c e < 1 . 0 7 ° C A
EN-01852
(3)
(4)
(1)(5)(2)

GD(H6DO)-10
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
4. GENERAL DRIVING CYCLE
1. Crankshaft Timing Diagnosis
Perform the diagnosis continuously after starting engine and while AVCS is not operating.
2. Slow Response Diagnosis
Perform the diagnosis continuously after warm-up, while AVCS is operating and the target timing advance is
small.
5. DIAGNOSTIC METHOD
1. Crankshaft Timing Diagnosis
Judge as NG when the timing advance is large. Judge as OK when it is small.
Judge as NG when all the following conditions are established and the continuous time is more than 20 sec-
onds. Judge as OK and clear the NG when the following conditions are not established and the continuous
time is more than one second.
Time Needed for Diagnosis: 20 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cycles.
2. Slow Response Diagnosis
Calculates (integrate by positive and negative separately) the AVCS deviation amount when the timing ad-
vance is large. Judges NG if the integrated value is large after 30 seconds has passed, and judges OK if it
is small.
Abnormality Judgment
When all of the following conditions are established, judged as OK.
Time Needed for Diagnosis: 30 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunctions occur in 2 continuous driving cy-
cles.
Normality Judgment
Judges OK when all of the following conditions are established, and clears the NG.
Judgment Value
Malfunction Criteria Threshold Value
Basic timing advance < –18°CA
or
> 18°CA
Judgment Value
Malfunction Criteria Threshold Value
AV C S t a r g e t p o s i t i o n≥ 0°CA
Ta r g e t t i m i n g a d v a n c e l a r g e i n t e g r a t e d
counter
30 seconds or more
AV C S p o s i t i v e d ev i a t i o n i n t e g r a t e d va l u e
or
AV C S n e g a t i v e d ev i a t i o n i n t e g r a t e d
value
> 8000 (R Bank)°CA
8000 (L Bank)
< –2500 (R Bank)°CA
–2500 (L Bank)
Judgment Value
Malfunction Criteria Threshold Value
AV C S t a r g e t p o s i t i o n≥ 0°CA
Ta r g e t t i m i n g a d v a n c e l a r g e i n t e g r a t e d
counter
30 seconds or more
AV C S p o s i t i v e d ev i a t i o n i n t e g r a t e d va l u e
or
AV C S n e g a t i v e d ev i a t i o n i n t e g r a t e d
value
≤ 8000 (R Bank)°CA
8000 (L Bank)
≥ –2500 (R Bank)°CA
–2500 (L Bank)

GD(H6DO)-11
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
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
Make the oil flow control solenoid valve driving duty a predetermined value (9.36%).
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
B: DTC P0016 CRANKSHAFT POSITION - CAMSHAFT POSITION CORRELA-
TION (BANK 1)
NOTE:
For the diagnostic procedure, refer to DTC P0011. POSITION TIMING - OVER-ADVANCED (BANK 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
C: DTC P0018 CRANKSHAFT POSITION - CAMSHAFT POSITION CORRELA-
TION (BANK 2)
NOTE:
For the diagnostic procedure, refer to DTC P0011. POSITION TIMING - OVER-ADVANCED (BANK 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
D: DTC P0021 INTAKE CAMSHAFT POSITION TIMING - OVER-ADVANCED
(BANK 2)
NOTE:
For the diagnostic procedure, refer to DTC P0011. POSITION TIMING - OVER-ADVANCED (BANK 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>

GD(H6DO)-12
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
E: DTC P0026 INTAKE VALVE CONTROL SOLENOID CIRCUIT RANGE/PER-
FORMANCE (BANK 1)
1. OUTLINE OF DIAGNOSIS
Detected as NG with either Low NG or High NG.
A variable valve lift diagnosis oil pressure switch is installed for diagnosis. It is possible to determine whether
the intake valve is in high mode (increase the amount of lift) or in low mode (suppressing the amount of lift)
when the variable valve lift diagnosis oil pressure switch is turned ON or OFF.
Normal
Low NG
When the variable valve lift diagnosis oil pressure switch remains OFF even though the intake valve tried to
enter high mode (oil switching solenoid valve duty is large), this is judged as a Low NG.
High NG
When the variable valve lift diagnosis oil pressure switch remains ON even though the intake valve tried to
enter low mode (oil switching solenoid valve duty is small), this is judged as a High NG.
Oil switching solenoid valve duty Intake valve Variable valve lift diagnosis oil pressure switch
Large High Mode ON
Minimum Low Mode OFF

GD(H6DO)-13
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
2. COMPONENT DESCRIPTION
The variable valve lift system optimizes the intake valve lift by switching between the low lift cam and the high
lift cam according to the engine RPM. The amount of intake valve lift is varied by controlling the oil switching
solenoid valve duty according to signals from the ECM.
3. ENABLE CONDITIONS
(A) When at low speed (B) When at high speed

(1) Oil switching solenoid valve
Secondary Parameters Enable Conditions
Battery voltage≥ 10.9 V
After engine starting≥ 6 sec.
Engine oil temperature≥ 0°C (0°F)
Va r i a b l e va l v e l i f t c o n t r o l O p e r a t i o n
EN-03119
(1)
(B)
(A)

GD(H6DO)-14
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously 6 seconds after engine start while variable valve lift is being controlled.
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the continuous time is longer than the predetermined time when the following conditions
are established.
Time Needed for Diagnosis:
Low side 0.784 seconds
High side: 3.0 seconds
Malfunction Indicator Light: Illuminates as soon as a malfunction occurs.
Normality Judgment
When the continuous time is more than 3 seconds while the following conditions are established, judge as
OK and clear the NG.
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
Low NG
Duty ratio≥ 62%
Va r i a b l e va l v e l i f t d i a g n o s i s o i l p r e s s u r e
switch
OFF
High NG
Duty ratio < 33%
Va r i a b l e va l v e l i f t d i a g n o s i s o i l p r e s s u r e
switch
ON
Judgment Value
Malfunction Criteria Threshold Value
Low OK
Duty ratio≥ 62%
Va r i a b l e va l v e l i f t d i a g n o s i s o i l p r e s s u r e
switch
ON
High OK
Duty ratio < 33%
Va r i a b l e va l v e l i f t d i a g n o s i s o i l p r e s s u r e
switch
OFF

GD(H6DO)-15
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
F: DTC P0028 INTAKE VALVE CONTROL SOLENOID CIRCUIT RANGE/PER-
FORMANCE (BANK 2)
NOTE:
For diagnostic procedures, refer to DTC P0026. TROL SOLENOID CIRCUIT RANGE/PERFORMANCE (BANK 1), Diagnostic Trouble Code (DTC) Detecting
Criteria.>
G: DTC P0030 HO2S HEATER CONTROL CIRCUIT (BANK 1 SENSOR 1)
1. OUTLINE OF DIAGNOSIS
Detect functional errors of the front oxygen (A/F) sensor heater.
Judge as NG when it is determined that the front oxygen (A/F) sensor impedance is large when looking at en-
gine status such as deceleration fuel cut.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously in 30 seconds after starting the engine.
(1) Gasket (3) Sensor housing (4) Protection tube
(2) Ceramic heater
Secondary Parameters Enable Conditions
Condition established time 30 seconds or more
Battery voltage > 10.9 V
Control duty ≥ 35% Experienced
After fuel cut 20 seconds or more
EN-02181
( 1 )( 2 )
( 3 )( 4 )

GD(H6DO)-16
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
5. DIAGNOSTIC METHOD
Judge as NG when the continuous time of meeting the malfunction criteria below becomes more than the
time needed for diagnosis (10 seconds). Judge as OK and clear NG when the continuous time of not com-
pleting the malfunction criteria below becomes more than the time needed for diagnosis (10 seconds).
Time Needed for Diagnosis: 10 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)
Judgment Value
Malfunction Criteria Threshold Value
Fr o nt ox yg e n ( A / F) s en so r im pe d an c e > 5 0 Ω

GD(H6DO)-17
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
H: DTC P0031 HO2S HEATER CONTROL CIRCUIT LOW (BANK 1 SENSOR 1)
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of heater.
The 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
Always perform the diagnosis continuously.
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge NG when the continuous time until completing the malfunction criteria below becomes more than 1
second (8 cycles).
Time Needed for Diagnosis: 1 second
Malfunction Indicator Light: Illuminates as soon as a malfunction occurs.
(A) Battery voltage (C) 128 milliseconds (D) Low error
(B) Front 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
Fr o nt ox yg en (A / F ) se ns or h ea t er co n tr o l
duty
< 87.5%
EN-01792
(C)
(A)
(B)
ON
OFF
0V(D)

GD(H6DO)-18
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Normality Judgment
Judge as OK and clear the NG 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
•A/F main learning: Not allowed to calculate the A/F main learning compensation factor.
•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
Output voltage level High