2009 SUBARU TRIBECA fuel cap

VDC-5
General Description
VEHICLE DYNAMICS CONTROL (VDC)
5. RELAY BOX
C: CAUTION
Please clearly understand and adhere to the follow-
ing general precautions. They must be strictly fol-
lowed to avoid any injury to the person doing the
work or people in the area.
1. OPERATION
•Wear work clothing, including a cap, protective
goggles and protective shoes during operation.
•Remove contamination including dirt and corro-
sion before removal, installation or disassembly.
•Keep the disassembled parts in order and pro-
tect them from dust and dirt.
•Before disconnecting connectors of sensors or
units, be sure to disconnect the ground cable from
the battery.
•Before removal, installation or disassembly, be
sure to clarify the failure. Avoid unnecessary re-
moval, installation, disassembly and replacement.
•Be careful not to burn yourself, because each
part on the vehicle is hot after running.
•Be sure to tighten fasteners including bolts and
nuts to the specified torque.
•Place shop jacks or rigid racks at the specified
points.
2. OIL
When handling oil, follow the rules below to prevent
unexpected accidents.
•Prepare container and waste cloths when per-
forming work which oil could possibly spill. If oil
spills, wipe it off immediately to prevent from pene-
trating into floor or flowing outside, for environmen-
tal protection.
•Follow all government and local regulations con-
cerning waste disposal.
3. BRAKE FLUID
If brake fluid gets in your eyes or on your skin, do
the following:
•Wash eyes and seek immediate medical atten-
tion.
•Wash your skin with soap and then rinse thor-
oughly with water.
Follow all government and local regulations con-
cerning waste disposal.
(1) Relay box (4) Fuel safe relay (green)Tightening torque: N·m (kgf-m, ft-lb)
(2) Cover (5) Vacuum pump relay (black)T: 18 (1.8, 13.0)
(3) Motor relay (blue)

EC(H6DO)-10
Fuel Tank Pressure Sensor
EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)
9. Fuel Tank Pressure Sensor
A: REMOVAL
1) Set the vehicle on a lift.
2) Disconnect the ground cable from battery.
3) Open the fuel filler flap lid, and remove the fuel
filler cap.
4) Lift-up the vehicle.
5) Disconnect the connector from fuel tank pres-
sure sensor.
6) Disconnect the hose from the fuel tank pressure
sensor.
7) Remove the fuel tank pressure sensor along
with the bracket.
B: INSTALLATION
Install in the reverse order of removal.
Tightening torque:
7.4 N·m (0.75 kgf-m, 5.4 ft-lb)
C: INSPECTION
Make sure the hoses are not cracked or loose.

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)-73
List of Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
P0345 Camshaft Position Sensor “A” Circuit
(Bank 2)
SOR “A”CIRCUIT (BANK 2), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0420 Catalyst System Efficiency Below
Threshold (Bank 1)
CIENCY BELOW THRESHOLD (BANK 1), Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
P0442 Evaporative Emission Control Sys-
tem Leak Detected (Small Leak)
CONTROL SYSTEM LEAK DETECTED (SMALL LEAK), Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>
P0447 Evaporative Emission Control Sys-
tem Vent Control Circuit Open
CONTROL SYSTEM VENT CONTROL CIRCUIT OPEN, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>
P0448 Evaporative Emission Control Sys-
tem Vent Control Circuit Shorted
CONTROL SYSTEM VENT CONTROL CIRCUIT SHORTED, Diagnostic
Procedure with Diagnostic Trouble Code (DTC).>
P0451 Evaporative Emission Control Sys-
tem Pressure Sensor
CONTROL SYSTEM PRESSURE SENSOR, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0452 Evaporative Emission Control Sys-
tem Pressure Sensor Low Input
CONTROL SYSTEM PRESSURE SENSOR LOW INPUT, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>
P0453 Evaporative Emission Control Sys-
tem Pressure Sensor High Input
CONTROL SYSTEM PRESSURE SENSOR HIGH INPUT, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>
P0456 Evaporative Emission Control Sys-
tem Leak Detected (Very Small
Leak)
CONTROL SYSTEM LEAK DETECTED (VERY SMALL LEAK), Diagnostic
Procedure with Diagnostic Trouble Code (DTC).>
P0457 Evaporative Emission Control Sys-
tem Leak Detected (Fuel Cap Loose/
Off)
CONTROL SYSTEM LEAK DETECTED (FUEL CAP LOOSE/OFF), Diag-
nostic Procedure with Diagnostic Trouble Code (DTC).>
P0458 Evaporative Emission Control Sys-
tem Purge Control Valve Circuit Low
CONTROL SYSTEM PURGE CONTROL VALVE CIRCUIT LOW, Diagnostic
Procedure with Diagnostic Trouble Code (DTC).>
P0459 Evaporative Emission Control Sys-
tem Purge Control Valve Circuit High
CONTROL SYSTEM PURGE CONTROL VALVE CIRCUIT HIGH, Diagnostic
Procedure with Diagnostic Trouble Code (DTC).>
P0461 Fuel Level Sensor Circuit Range/Per-
for mance
CUIT RANGE/PERFORMANCE, Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>
P0462 Fuel Level Sensor Circuit Low Input CUIT LOW INPUT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0463 Fuel Level Sensor Circuit High Input CUIT HIGH INPUT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0464 Fuel Level Sensor Circuit Intermittent CUIT INTERMITTENT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0483 Cooling Fan Rationality Check CHECK, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0500 Vehicle Speed Sensor Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0506 Idle Control System RPM Lower
Than Expected
LOWER THAN EXPECTED, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0507 Idle Control System RPM Higher
Than Expected
HIGHER THAN EXPECTED, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
DTC Item Reference

EN(H6DO)(diag)-270
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
CC:DTC P0442 EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECT-
ED (SMALL LEAK)
DTC DETECTING CONDITION:
•Detected when two consecutive driving cycles with fault occur.
•GENERAL DESCRIPTION SYSTEM LEAK DETECTED (SMALL LEAK), Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
•Fuel odor
•There is a hole of more than 1.0 mm (0.04 in) dia. in evaporation system or fuel tank.
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode OPERATION, Clear Memory Mode.> and Inspection Mode Inspection Mode.>.
Step Check Yes No
1CHECK ANY OTHER DTC ON DISPLAY.Is any other DTC displayed? Check the appro-
priate DTC using
the “List of Diag-
nostic Trouble
Code (DTC)”.
EN(H6DO)(diag)-
69, List of Diag-
nostic Trouble
Code (DTC).>
Go to step 2.
2CHECK FUEL FILLER CAP.
1) Turn the ignition switch to OFF.
2) Check the fuel filler cap.
NOTE:
The DTC is stored in memory if fuel filler cap is
or was loose or if the cap chain has caught
while tightening.
Is the fuel filler cap tightened
securely?
Go to step 3.Tighten fuel filler
cap securely.
3CHECK FUEL FILLER CAP.Is the fuel filler cap SUBARU
genuine?
Go to step 4.Replace with a
SUBARU genuine
fuel filler cap.
4CHECK FUEL FILLER PIPE PACKING.Is there any damage to the
seal between fuel filler cap and
fuel filler pipe?
Repair or replace
the fuel filler cap
and fuel filler pipe.
FU(H6DO)-41,
Fuel Filler Pipe.>
Go to step 5.
5CHECK DRAIN VALVE.
1) Connect the test mode connector.
2) Turn the ignition switch to ON.
3) Operate the drain valve.
NOTE:
Drain valve operation can also be executed us-
ing Subaru Select Monitor. Refer to “Compulso-
ry Valve Operation Check Mode” for
procedures. Compulsory Valve Operation Check Mode.>
Does the drain valve operate? Go to step 6.Replace the drain
valve. EC(H6DO)-12,
Drain Valve.>

EN(H6DO)(diag)-278
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step Check Yes No
1CHECK ANY OTHER DTC ON DISPLAY.Is any other DTC displayed? Check the appro-
priate DTC using
the “List of Diag-
nostic Trouble
Code (DTC)”.
EN(H6DO)(diag)-
69, List of Diag-
nostic Trouble
Code (DTC).>
Go to step 2.
2CHECK FUEL FILLER CAP.
1) Turn the ignition switch to OFF.
2) Open the fuel flap.
Is the fuel filler cap tightened
securely?
Go to step 3.Tighten fuel filler
cap securely.
3CHECK PRESSURE VACUUM LINE.
NOTE:Check the following item.
•Disconnection, leakage and clogging of the
vacuum hoses and pipes between fuel tank
pressure sensor and fuel tank
•Disconnection, leakage and clogging of the
air ventilation hoses and pipes between fuel fill-
er pipe and fuel tank
Is there a fault in pressure/vac-
uum line?
Repair or replace
the hoses and
pipes.
Replace the fuel
tank pressure sen-
sor. EC(H6DO)-10,
Fuel Tank Pres-
sure Sensor.>

EN(H6DO)(diag)-280
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step Check Yes No
1CHECK CURRENT DATA.
1) Turn the ignition switch to OFF.
2) Remove the fuel filler cap.
3) Install the fuel filler cap.
4) Turn the ignition switch to ON.
5) Read the data of fuel tank pressure sensor
signal using Subaru Select Monitor.
NOTE:•Subaru Select Monitor
For detailed operation procedures, refer to
“READ CURRENT DATA FOR ENGINE”. to EN(H6DO)(diag)-26, Subaru Select Moni-
tor.>
Is the measured value less
than –2.8 kPa (–21.0 mmHg, –
0.827 inHg)?
Go to step 2.Even if the mal-
function indicator
light illuminates,
the circuit has
returned to a nor-
mal condition at
this time.
2CHECK POWER SUPPLY TO FUEL TANK
PRESSURE SENSOR.
Measure the voltage between ECM connector
and chassis ground.
Connector & terminal
(B135) No. 22 (+) — Chassis ground (–):
Is the voltage more than 4.5 V? Go to step 4.Go to step 3.
3CHECK POWER SUPPLY TO FUEL TANK
PRESSURE SENSOR.
Measure the voltage between ECM connector
and chassis ground.
Connector & terminal
(B135) No. 22 (+) — Chassis ground (–):
Does the voltage change by
shaking the ECM harness and
connector?
Repair poor con-
tact in ECM con-
nector.
Contact with SOA
Service Center.
4CHECK INPUT SIGNAL OF ECM.
Measure the voltage between ECM and chas-
sis ground.
Connector & terminal
(B135) No. 32 (+) — Chassis ground (–):
Is the voltage less than 0.2 V? Go to step 6.Go to step 5.
5CHECK INPUT SIGNAL FOR ECM (USING
SUBARU SELECT MONITOR).
Read the data of fuel tank pressure sensor sig-
nal using Subaru Select Monitor.
NOTE:
•Subaru Select Monitor
For detailed operation procedure, refer to
“READ CURRENT DATA FOR ENGINE”. to EN(H6DO)(diag)-26, Subaru Select Moni-
tor.>
Does the measured value
change by shaking ECM har-
ness and connector?
Repair poor con-
tact in ECM con-
nector.
Go to step 6.
6CHECK HARNESS BETWEEN ECM AND
COUPLING CONNECTOR IN REAR WIRING
HARNESS.
1) Turn the ignition switch to OFF.
2) Remove the rear seat cushion.
3) Separate rear wiring harness and fuel tank
cord.
4) Turn the ignition switch to ON.
5) Measure the voltage between rear wiring
harness connector and chassis ground.
Connector & terminal
(R15) No. 11 (+) — Chassis ground (–):
Is the voltage more than 4.5 V? Go to step 7.Repair the har-
ness and connec-
tor.
NOTE:In this case, repair
the following item:
•Open circuit
of harness be-
tween ECM and
rear wiring har-
ness connector
•Poor contact
of coupling con-
nector

EN(H6DO)(diag)-283
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step Check Yes No
1CHECK CURRENT DATA.
1) Turn the ignition switch to OFF.
2) Remove the fuel filler cap.
3) Install the fuel filler cap.
4) Turn the ignition switch to ON.
5) Read the data of fuel tank pressure sensor
signal using Subaru Select Monitor.
NOTE:•Subaru Select Monitor
For detailed operation procedures, refer to
“READ CURRENT DATA FOR ENGINE”. to EN(H6DO)(diag)-26, Subaru Select Moni-
tor.>
Is the measured value 2.8 kPa
(21.0 mmHg, 0.827 inHg) or
more?
Go to step 11.Go to step 2.
2CHECK POWER SUPPLY TO FUEL TANK
PRESSURE SENSOR.
Measure the voltage between ECM connector
and chassis ground.
Connector & terminal
(B135) No. 22 (+) — Chassis ground (–):
Is the voltage more than 4.5 V? Go to step 4.Go to step 3.
3CHECK POWER SUPPLY TO FUEL TANK
PRESSURE SENSOR.
Measure the voltage between ECM connector
and chassis ground.
Connector & terminal
(B135) No. 22 (+) — Chassis ground (–):
Does the measured value
change by shaking ECM har-
ness and connector?
Repair poor con-
tact in ECM con-
nector.
Replace the ECM.
FU(H6DO)-32,
Engine Control
Module (ECM).>
4CHECK INPUT SIGNAL OF ECM.
Measure the voltage between ECM and chas-
sis ground.
Connector & terminal
(B135) No. 32 (+) — Chassis ground (–):
Is the voltage less than 0.2 V? Go to step 6.Go to step 5.
5CHECK INPUT SIGNAL FOR ECM (USING
SUBARU SELECT MONITOR).
Read the data of fuel tank pressure sensor sig-
nal using Subaru Select Monitor.
NOTE:
•Subaru Select Monitor
For detailed operation procedure, refer to
“READ CURRENT DATA FOR ENGINE”. to EN(H6DO)(diag)-26, Subaru Select Moni-
tor.>
Does the measured value
change by shaking ECM har-
ness and connector?
Repair poor con-
tact in ECM con-
nector.
Go to step 6.
6CHECK HARNESS BETWEEN ECM AND
COUPLING CONNECTOR IN REAR WIRING
HARNESS.
1) Turn the ignition switch to OFF.
2) Remove the rear seat cushion.
3) Separate rear wiring harness and fuel tank
cord.
4) Turn the ignition switch to ON.
5) Measure the voltage between rear wiring
harness connector and chassis ground.
Connector & terminal
(R15) No. 11 (+) — Chassis ground (–):
Is the voltage more than 4.5 V? Go to step 7.Repair the har-
ness and connec-
tor.
NOTE:In this case, repair
the following item:
•Open circuit
of harness be-
tween ECM and
rear wiring har-
ness connector
•Poor contact
of coupling con-
nector