2009 SUBARU TRIBECA Misfire

EN(H6DO)(diag)-6
General Description
ENGINE (DIAGNOSTICS)
C: NOTE
1. GENERAL DESCRIPTION
•The on-board diagnostics (OBD) system detects
and indicates a fault in various inputs and outputs
of the complex electronic control. Malfunction indi-
cator light in the combination meter indicates oc-
currence of a fault or trouble.
•Further, against such a failure or sensors as may
disable the drive, the fail-safe function is provided
to ensure the minimal drivability.
•The OBD system incorporated with the vehicles
within this engine family complies with OBD-II Reg-
ulations. The OBD system monitors the compo-
nents and the system malfunction listed in Engine
Section which affects on emissions.
•When the system decides that a malfunction oc-
curs, malfunction indicator light illuminates. At the
same time of the malfunction indicator light illumi-
nation or blinking, a DTC and a freeze frame en-
gine conditions are stored into on-board computer.
•The OBD system stores freeze frame engine
condition data (engine load, engine coolant tem-
perature, fuel trim, engine speed and vehicle
speed, etc.) into on-board computer when it detects
a malfunction first.
•If the OBD system detects the various malfunc-
tions including the fault of fuel trim or misfire, the
OBD system first stores freeze frame engine condi-
tions about fuel trim or misfire.
•When the malfunction does not occur again for
three consecutive driving cycles, malfunction indi-
cator light is turned off, but DTC remains at on-
board computer.
•When troubleshooting the vehicle which com-
plies with OBD-II Regulations, connect the Subaru
Select Monitor or general scan tool to the vehicle.
2. ENGINE AND EMISSION CONTROL SYS-
TEM
•The Multipoint Fuel Injection (MFI) system is a
system that supplies the optimum air-fuel mixture
to the engine for all the various operating condi-
tions through the use of the latest electronic tech-
nology.
With this system fuel, which is pressurized at a con-
stant pressure, is injected into the intake air pas-
sage of the cylinder head. The injection quantity of
fuel is controlled by an intermittent injection system
where the electro-magnetic injection valve (fuel in-
jector) opens only for a short period of time, de-
pending on the quantity of air required for one cycle
of operation. In actual operation, the injection quan-
tity is determined by the duration of an electric
pulse applied to the fuel injector and this permits
simple, yet highly precise metering of the fuel.
•Further, all the operating conditions of the engine
are converted into electric signals, and this results
in additional features of the system, such as large
improved adaptability, easier addition of compen-
sating element etc.
The MFI system also has the following features:
•Reduced emission of harmful exhaust gases.
•Reduced in fuel consumption.
•Increased engine output.
•Superior acceleration and deceleration.
•Superior startability and warm-up perfor-
mance in cold weather since compensation is
made for coolant and intake air temperature.

EN(H6DO)(diag)-29
Subaru Select Monitor
ENGINE (DIAGNOSTICS)
5. READ CURRENT DATA FOR ENGINE (OBD MODE)
1) On the «Main Menu» display screen, select the {Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display screen, select the {Engine} and press the [YES] key.
3) Press the [YES] key after the information of engine type has been displayed.
4) On the «Engine Diagnosis» display screen, select the {OBD System} and press the [YES] key.
5) On the «OBD Menu» display screen, select the {Current Data Display/Save}, and then press the [YES]
key.
6) On the «Data Display Menu» screen, select the {Data Display} and press the [YES] key.
7) Using the scroll key, scroll the display screen up or down until the desired data is shown.
•A list of the support data is shown in the following table.
AT c o o r d i n a t e f u e l c u t d e m a n d s i g n a l AT c o o r d i n a t e f u e l c u t d e m a n d — O F F
Ve h i c l e d y n a m i c s c o n t r o l ( V D C ) t o r q u e d o w n
prohibition outputBan of Torque Down — Permission
Ve h i c l e d y n a m i c s c o n t r o l ( V D C ) t o r q u e d o w n
demandVDC torque down demand — OFF
AT c o o r d i n a t e p e r m i s s i o n s i g n a l AT c o o r d i n a t e p e r m i s s i o n s i g n a l — P e r m i s s i o n
Electronic throttle control motor relay signal ETC motor relay — ON
Stop light switch signal Stop Light Switch — OFF
SET/COAST switch signal SET/COAST SW — OFF
RESUME/ACCEL switch signal RESUME/ACCEL SW — OFF
Brake switch signal Brake SW — OFF
Main switch signal Main SW — OFF
Body integrated unit data reception Body Int. Unit Data — Yes
Body integlated unit counter update Body Int. Unit Count — Yes
Cruise control cancel switch signal CC Cancel SW — OFF
Va r i a b l e v a 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 sw i t c h
signal 1Oil Temperature SW1 — ON
Va r i a b l e v a 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 sw i t c h
signal 2Oil Temperature SW2 — ON
Description Display Unit of measure
Number of diagnosis code Number of Diag. Codes: 0
Condition of malfunction indicator light MI (MIL) ON or OFF
Monitoring test of misfire Misfire monitoring Finish
Monitoring test of fuel system Fuel system monitoring Finish
Monitoring test of comprehensive component Component monitoring Finish
Te s t o f c a t a l y s t C a t a l y s t D i a g n o s i s F i n i s h o r i n c o m p l e t e
Te s t o f h e a t i n g - t y p e c a t a l y s t H e a t e d c a t a l y s t N o
Te s t o f e v a p o r a t i v e e m i s s i o n p u r g e c o n t r o l s y s t e m E v a p o r a t i v e p u r g e s y s t e m F i n i s h o r i n c o m p l e t e
Te s t o f s e c o n d a r y a i r s y s t e m S e c o n d a r y a i r s y s t e m N o
Te s t o f a i r c o n d i t i o n i n g s y s t e m r e f r i g e r a n t A / C s y s t e m r e f r i g e r a n t N o
Te s t o f o x y g e n s e n s o r O x y g e n s e n o r F i n i s h o r i n c o m p l e t e
Te s t o f o x y g e n s e n s o r h e a t e r O x y g e n s e n s o r h e a t e r F i n i s h
Te s t o f E G R s y s t e m E G R s y s t e m N o s u p p o r t
A/F control #1 Fuel system for Bank 1 OPEN early period
A/F control #2 Fuel system for Bank 2 OPEN early period
Calculated load valve Calculated load valve %
Engine coolant temperature Coolant Temp. °C
A/F compensation #1 Short term fuel trim B1 %
A/F learning #1 Long term fuel trim B1 %
A/F compensation #2 Short term fuel trim #2 %
A/F learning #2 Long term fuel trim B2 %
Description Display Unit of measure Note (at idling)

EN(H6DO)(diag)-41
Drive Cycle
ENGINE (DIAGNOSTICS)
2. DRIVE CYCLE A — DRIVE THE VEHICLE WITH 80 KM/H (50 MPH) FOR 20 MINUTES, AND
THEN IDLE THE ENGINE FOR A MINUTE.
DTC Item On condition
*P0125 Insufficient Coolant Temperature For Closed Loop Fuel Control
Engine coolant temperature at
engine start is 20°C (68°F) or
less.
*P0128Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Tem-
perature)—
*P0133 O2 Sensor Circuit Slow Response (Bank 1 Sensor 1) —
*P0153 O2 Sensor Circuit Slow Response (Bank 2 Sensor 1) —
*P0171 System Too Lean (Bank 1)Complete diagnosis for drive
cycle B or C
*P0172 System Too Rich (Bank 1)Complete diagnosis for drive
cycle B or C
*P0174 System Too Lean (Bank 2)Complete diagnosis for drive
cycle B or C
*P0175 System Too Rich (Bank 2)Complete diagnosis for drive
cycle B or C
*P0196 Engine Oil Temperature Sensor Circuit Range/performance —
*P0301 Cylinder 1 Misfire DetectedComplete diagnosis for drive
cycle B or C
*P0302 Cylinder 2 Misfire DetectedComplete diagnosis for drive
cycle B or C
*P0303 Cylinder 3 Misfire DetectedComplete diagnosis for drive
cycle B or C
*P0304 Cylinder 4 Misfire DetectedComplete diagnosis for drive
cycle B or C
*P0305 Cylinder 5 Misfire DetectedComplete diagnosis for drive
cycle B or C
*P0306 Cylinder 6 Misfire DetectedComplete diagnosis for drive
cycle B or C
*P0420 Catalyst System Efficiency Below Threshold (Bank 1) —
*P0442 Evaporative Emission Control System Leak Detected (Small Leak)
Engine coolant temperature at
engine start is 25°C (77°F) or
less.
*P0451 Evaporative Emission Control System Pressure Sensor —
*P0456 Evaporative Emission Control System Leak Detected (Very Small Leak)
Engine coolant temperature at
engine start is 25°C (77°F) or
less.
*P0457 Evaporative Emission Control System Leak Detected (Fuel Cap Loose/ Off)
Engine coolant temperature at
engine start is 25°C (77°F) or
less.
*P0464 Fuel Level Sensor Circuit Intermittent —
P1443 Vent Control Solenoid Valve Function Problem —
*P2096 Post Catalyst Fuel Trim System Too Lean (Bank 1)Complete diagnosis for drive
cycle B or C
*P2097 Post Catalyst Fuel Trim System Too Rich (Bank 1)Complete diagnosis for drive
cycle B or C
*P2098 Post Catalyst Fuel Trim System Too Lean (Bank 2)Complete diagnosis for drive
cycle B or C
*P2099 Post Catalyst Fuel Trim System Too Rich (Bank 2)Complete diagnosis for drive
cycle B or C
P2103 Throttle Actuator Control Motor Circuit HighComplete diagnosis for drive
cycle B or C

EN(H6DO)(diag)-42
Drive Cycle
ENGINE (DIAGNOSTICS)
3. DRIVE CYCLE B — 10 MINUTES IDLING
NOTE:
Drive the vehicle in more than 10 km/h (6 MPH) before diagnosis.
DTC Item On condition
*P0126 Insufficient Coolant Temperature for Stable Operation —
*P0171 System Too Lean (Bank 1)Complete diagnosis for drive
cycle A or C
*P0172 System Too Rich (Bank 1)Complete diagnosis for drive
cycle A or C
*P0174 System Too Lean (Bank 2)Complete diagnosis for drive
cycle A or C
*P0175 System Too Rich (Bank 2)Complete diagnosis for drive
cycle A or C
*P0301 Cylinder 1 Misfire DetectedComplete diagnosis for drive
cycle A or C
*P0302 Cylinder 2 Misfire DetectedComplete diagnosis for drive
cycle A or C
*P0303 Cylinder 3 Misfire DetectedComplete diagnosis for drive
cycle A or C
*P0304 Cylinder 4 Misfire DetectedComplete diagnosis for drive
cycle A or C
*P0305 Cylinder 5 Misfire DetectedComplete diagnosis for drive
cycle A or C
*P0306 Cylinder 6 Misfire DetectedComplete diagnosis for drive
cycle A or C
*P0459 Evaporative Emission Control System Purge Control Valve Circuit High —
*P0483 Cooling Fan Rationality Check —
*P0506 Idle Control System RPM Lower Than Expected —
*P0507 Idle Control System RPM Higher Than Expected —
*P2096 Post Catalyst Fuel Trim System Too Lean (Bank 1)Complete diagnosis for drive
cycle A or C
*P2097 Post Catalyst Fuel Trim System Too Rich (Bank 1)Complete diagnosis for drive
cycle A or C
*P2098 Post Catalyst Fuel Trim System Too Lean (Bank 2)Complete diagnosis for drive
cycle A or C
*P2099 Post Catalyst Fuel Trim System Too Rich (Bank 2)Complete diagnosis for drive
cycle A or C
P2103 Throttle Actuator Control Motor Circuit HighComplete diagnosis for drive
cycle A or C

EN(H6DO)(diag)-43
Drive Cycle
ENGINE (DIAGNOSTICS)
4. DRIVE CYCLE C — DRIVE THE VEHICLE WITH FOLLOWING DRIVE PATTERNS
(A) Idle the engine for more than 10
seconds.
(D) Decelerate the vehicle to 64 km/h
(40 MPH) with throttle fully closed.
(G) Stop the vehicle with throttle fully
closed.
(B) Accelerate the vehicle to 97 km/h
(60 MPH) within 20 seconds.
(E) Drive the vehicle at 64 km/h (40
MPH) for 20 seconds.
(H) Vehicle speed km/h (MPH)
(I) Sec.
(C) Drive the vehicle at 97 km/h (60
MPH) for 20 seconds.
(F) Accelerate the vehicle to 97 km/h
(60 MPH) within 10 seconds.

DTC Item On condition
P0026 Intake Valve Control Solenoid Circuit Range/Performance (Bank 1) —
P0028 Intake Valve Control Solenoid Circuit Range/Performance (Bank 2) —
*P0030 HO2S Heater Control Circuit (Bank 1 Sensor 1) —
*P0050 HO2S Heater Control Circuit (Bank 2 Sensor 1) —
*P0068 MAP/MAF - Throttle Position Correlation —
P0076 Intake Valve Control Circuit Low (Bank 1) —
P0082 Intake Valve Control Circuit Low (Bank 2) —
*P0101 Mass or Volume Air Flow Circuit Range/Performance —
P0134 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1) —
*P0139 O2 Sensor Circuit Slow Response (Bank 1 Sensor 2) —
P0154 O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1) —
*P0159 O2 Sensor Circuit Slow Response (Bank 2 Sensor 2) —
*P0171 System Too Lean (Bank 1) Complete diagnosis for drive cycle A or B
*P0172 System Too Rich (Bank 1) Complete diagnosis for drive cycle A or B
*P0174 System Too Lean (Bank 2) Complete diagnosis for drive cycle A or B
*P0175 System Too Rich (Bank 2) Complete diagnosis for drive cycle A or B
*P0301 Cylinder 1 Misfire Detected Complete diagnosis for drive cycle A or B
*P0302 Cylinder 2 Misfire Detected Complete diagnosis for drive cycle A or B
*P0303 Cylinder 3 Misfire Detected Complete diagnosis for drive cycle A or B
*P0304 Cylinder 4 Misfire Detected Complete diagnosis for drive cycle A or B
*P0305 Cylinder 5 Misfire Detected Complete diagnosis for drive cycle A or B
*P0306 Cylinder 6 Misfire Detected Complete diagnosis for drive cycle A or B
P2103 Throttle Actuator Control Motor Circuit High Complete diagnosis for drive cycle A or B
EN-00842
(C)
(H)
(I)
(60)97
64(40)(B)
(A)
(F)(D)
(E)
150100500
(G)

EN(H6DO)(diag)-72
List of Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
P0182 Fuel Temperature Sensor “A” Circuit
Low Input
SOR “A” CIRCUIT LOW INPUT, Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>
P0183 Fuel Temperature Sensor “A” Circuit
High Input
SOR “A” CIRCUIT HIGH INPUT, Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>
P0196 Engine Oil Temperature Sensor Cir-
cuit Range/Performance
SENSOR CIRCUIT RANGE/PERFORMANCE, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0197 Engine Oil Temperature Sensor Cir-
cuit Low
SENSOR CIRCUIT LOW, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0198 Engine Oil Temperature Sensor Cir-
cuit High
SENSOR CIRCUIT HIGH, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0222 Throttle/Pedal Position Sensor/
Switch “B” Circuit Low Input
SENSOR/SWITCH “B” CIRCUIT LOW INPUT, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0223 Throttle/Pedal Position Sensor/
Switch “B” Circuit High Input
SENSOR/SWITCH “B” CIRCUIT HIGH INPUT, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0230 Fuel Pump Primary Circuit CUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0301 Cylinder 1 Misfire Detected DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0302 Cylinder 2 Misfire Detected DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0303 Cylinder 3 Misfire Detected DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0304 Cylinder 4 Misfire Detected DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0305 Cylinder 5 Misfire Detected DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0306 Cylinder 6 Misfire Detected DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0327 Knock Sensor 1 Circuit Low Input
(Bank 1 or Single Sensor)
LOW INPUT (BANK 1 OR SINGLE SENSOR), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0328 Knock Sensor 1 Circuit High Input
(Bank 1 or Single Sensor)
HIGH INPUT (BANK 1 OR SINGLE SENSOR), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0332 Knock Sensor 2 Circuit Low Input
(Bank 2)
LOW INPUT (BANK 2), Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0333 Knock Sensor 2 Circuit High Input
(Bank 2)
HIGH INPUT (BANK 2), Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0335 Crankshaft Position Sensor “A” Cir-
cuit
SOR “A” CIRCUIT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0336 Crankshaft Position Sensor “A” Cir-
cuit Range/Performance
SOR “A” CIRCUIT RANGE/PERFORMANCE, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0340 Camshaft Position Sensor “A” Circuit
(Bank 1 or Single Sensor)
SOR “A” CIRCUIT (BANK 1 OR SINGLE SENSOR), Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>
DTC Item Reference

EN(H6DO)(diag)-242
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
BN:DTC P0301 CYLINDER 1 MISFIRE DETECTED
NOTE:
For the diagnostic procedure, refer to DTC P0306. MISFIRE DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
BO:DTC P0302 CYLINDER 2 MISFIRE DETECTED
NOTE:
For the diagnostic procedure, refer to DTC P0306. MISFIRE DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
BP:DTC P0303 CYLINDER 3 MISFIRE DETECTED
NOTE:
For the diagnostic procedure, refer to DTC P0306. MISFIRE DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
BQ:DTC P0304 CYLINDER 4 MISFIRE DETECTED
NOTE:
For the diagnostic procedure, refer to DTC P0306. MISFIRE DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
5CHECK HARNESS BETWEEN FUEL PUMP
CONTROL UNIT AND ECM CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM.
3) Measure the resistance of harness
between fuel pump control unit and ECM con-
nector.
Connector & terminal
(R122) No. 9 — (B135) No. 33:
(R122) No. 8 — (B136) No. 12:
Is the resistance less than 1
Ω?
Go to step 6.Repair the har-
ness and connec-
tor.
NOTE:In this case, repair
the following item:
•Open circuit
between fuel
pump control
unit and ECM
•Poor contact
of fuel pump
control unit and
ECM connector
6CHECK HARNESS BETWEEN FUEL PUMP
CONTROL UNIT AND ECM CONNECTOR.
Measure the resistance of harness between
fuel pump control unit and chassis ground.
Connector & terminal
(R122) No. 9 — Chassis ground:
(R122) No. 8 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 7.Repair the ground
short circuit
between fuel pump
control unit and
ECM.
7CHECK POOR CONTACT.
Check poor contact of ECM and fuel pump
control unit connector.
Is there poor contact of ECM
and fuel pump control unit con-
nector?
Repair the poor
contact of ECM and
fuel pump control
unit connector.
Go to step 8.
8CHECK EXPERIENCE OF RUNNING OUT OF
FUEL.
Has the vehicle experienced
running out of fuel?
Finish the diagno-
sis.
NOTE:
DTC may be re-
corded as a result
of fuel pump idling
while running out
of fuel.
Replace the fuel
pump control unit.
FU(H6DO)-36,
Fuel Pump Control
Unit.>
Step Check Yes No

EN(H6DO)(diag)-243
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
BR:DTC P0305 CYLINDER 5 MISFIRE DETECTED
NOTE:
For the diagnostic procedure, refer to DTC P0306. MISFIRE DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>