engine SUBARU TRIBECA 2009 1.G Service Workshop Manual

EN(H6DO)(diag)-392
General Diagnostic Table
ENGINE (DIAGNOSTICS)
19.General Diagnostic Table
A: INSPECTION
1. ENGINE
NOTE:
Malfunction of parts other than those listed is also possible. eral.>
Symptom Problem parts
1. Engine stalls during idling.
1) Manifold absolute pressure sensor
2) Mass air flow and intake air temperature sensor
3) Ignition parts (*1)
4) Engine coolant temperature sensor (*2)
5) Crankshaft position sensor (*3)
6) Camshaft position sensor (*3)
7) Fuel injection parts (*4)
2. Rough idling
1) Manifold absolute pressure sensor
2) Mass air flow and intake air temperature sensor
3) Engine coolant temperature sensor (*2)
4) Ignition parts (*1)
5) Air intake system (*5)
6) Fuel injection parts (*4)
7) Electronic throttle control
8) Crankshaft position sensor (*3)
9) Camshaft position sensor (*3)
10) Oxygen sensor
11) Fuel pump and fuel pump relay
3. Engine does not return to idle.
1) Engine coolant temperature sensor
2) Electronic throttle control
3) Manifold absolute pressure sensor
4) Mass air flow and intake air temperature sensor
5) Accelerator pedal position sensor
6) Oil temperature sensor
4. Poor acceleration
1) Manifold absolute pressure sensor
2) Mass air flow and intake air temperature sensor
3) Electronic throttle control
4) Fuel injection parts (*4)
5) Fuel pump and fuel pump relay
6) Engine coolant temperature sensor (*2)
7) Crankshaft position sensor (*3)
8) Camshaft position sensor (*3)
9) A/C switch and A/C cut relay
10) Engine torque control signal circuit
11) Ignition parts (*1)
12) Accelerator pedal position sensor
13) Oil temperature sensor
5. Engine stalls, engine sags or hesitates at accel-
eration.
1) Manifold absolute pressure sensor
2) Mass air flow and intake air temperature sensor
3) Engine coolant temperature sensor (*2)
4) Crankshaft position sensor (*3)
5) Camshaft position sensor (*3)
6) Purge control solenoid valve
7) Fuel injection parts (*4)
8) Electronic throttle control
9) Fuel pump and fuel pump relay

EN(H6DO)(diag)-393
General Diagnostic Table
ENGINE (DIAGNOSTICS)
*1: Check ignition coil & ignitor assembly and spark plug.
*2: Indicate the symptom occurring only in cold temperatures.
*3: Make sure the secure installation.
*4: Check the fuel injector and fuel pressure regulator.
*5: Inspect air leak in air intake system.
6. Surging
1) Mass air flow and intake air temperature sensor
2) Manifold absolute pressure sensor
3) Engine coolant temperature sensor (*2)
4) Crankshaft position sensor (*3)
5) Camshaft position sensor (*3)
6) Fuel injection parts (*4)
7) Electronic throttle control
8) Fuel pump and fuel pump relay
7. Spark knock
1) Mass air flow and intake air temperature sensor
2) Manifold absolute pressure sensor
3) Engine coolant temperature sensor
4) Knock sensor
5) Fuel injection parts (*4)
6) Fuel pump and fuel pump relay
8. After burning in exhaust system
1) Mass air flow and intake air temperature sensor
2) Manifold absolute pressure sensor
3) Engine coolant temperature sensor (*2)
4) Fuel injection parts (*4)
5) Fuel pump and fuel pump relay
Symptom Problem parts

EN(H6DO)(diag)-394
General Diagnostic Table
ENGINE (DIAGNOSTICS)

FU(H6DO)-10
General Description
FUEL INJECTION (FUEL SYSTEMS)
C: CAUTION
•Wear work clothing, including a cap, protective goggles and protective shoes during operation.
•Remove contamination including dirt and corrosion before removal, installation or disassembly.
•Keep the disassembled parts in order and protect them from dust and dirt.
•Before removal, installation or disassembly, be sure to clarify the failure. Avoid unnecessary removal, in-
stallation, 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.
•Before disconnecting connectors of sensors or units, be sure to disconnect the ground cable from the bat-
tery.
•Place “NO FIRE” signs near the working area.
•Be careful not to spill fuel on the floor.
D: PREPARATION TOOL
ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS
18482AA010 CARTRIDGE Troubleshooting the electrical system.
22771AA030 SUBARU SELECT
MONITOR KIT
Tr o u b l e s h o o t i n g t h e e l e c t r i c a l s y s t e m .
42099AE000 CONNECTOR
REMOVER
Used for disconnecting quick connector of the
engine compartment.
ST18482AA010
ST22771AA030
ST42099AE000

FU(H6DO)-11
Throttle Body
FUEL INJECTION (FUEL SYSTEMS)
2. Throttle Body
A: REMOVAL
1) Remove the collector cover.
2) Disconnect the ground cable from battery.
3) Remove the air intake chamber. IN(H6DO)-6, REMOVAL, Air Intake Chamber.>
4) Disconnect the connectors from the throttle posi-
tion sensor.
5) Disconnect the engine coolant hoses (A) from
throttle body.
6) Remove the bolts (B) which secure throttle body
to intake manifold.
B: INSTALLATION
Install in the reverse order of removal.
NOTE:
Use new O-rings.
Tightening torque:
8 N·m (0.8 kgf-m, 5.9 ft-lb)
FU-02111
FU-02112
(A)(B)
(B)
(A)

FU(H6DO)-12
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
3. Intake Manifold
A: REMOVAL
1) Remove the collector cover.
2) Release the fuel pressure. 37, RELEASING OF FUEL PRESSURE, PROCE-
DURE, Fuel.>
3) Disconnect the ground cable from battery.
4) Open the fuel filler flap lid, and remove the fuel
filler cap.
5) Remove the air cleaner case and air intake
chamber. Cleaner Case.> Air Intake Chamber.>
6) Remove the generator. REMOVAL, Generator.>
7) Disconnect the connector from throttle body.
8) Disconnect the engine coolant hoses from throt-
tle body.
9) Disconnect the PCV hose.
10) Disconnect the brake booster hose.
11) Disconnect the fuel hoses from fuel pipe.
(1) Disconnect the connector of fuel pipe by
pushing the ST in the direction of arrow.
ST 42099AE000 CONNECTOR REMOVER
(2) Remove the clip, and disconnect the evapo-
ration hose from the pipe.
WARNING:
•Be careful not to spill fuel.
•Catch the fuel from hoses using a container
or cloth.
12) Remove the fuel pipe protector LH.
13) Remove the engine harness from fuel injector
pipe LH.
FU-02487
FU-02114
EC-02133
ME-02655
FU-02117

FU(H6DO)-13
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
14) Remove the bolts which hold fuel injector pipe
LH to cylinder head.
15) Remove the fuel pipe protector RH.
16) Remove the engine harness from fuel injector
pipe RH.
17) Remove the bolts which hold the fuel injector
pipe RH to the cylinder head.
18) Remove the bolts which hold the intake mani-
fold to the cylinder head.
•LH side
•RH side
19) Remove the intake manifold.
B: INSTALLATION
1) Install the intake manifold onto cylinder heads.
NOTE:
Use new O-rings.
Tightening torque:
25 N·m (2.5 kgf-m, 18 ft-lb)
•RH side
•LH side
FU-02118
FU-02119
FU-02120
FU-02121
FU-02122
FU-02122
FU-02121

FU(H6DO)-14
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
2) Install the bolts which hold fuel injector pipe RH
to cylinder head.
Tightening torque:
19 N·m (1.9 kgf-m, 14 ft-lb)
3) Install the engine harness to fuel injector pipe
RH.
4) Install the fuel pipe protector RH.
Tightening torque:
19 N·m (1.9 kgf-m, 14 ft-lb)
5) Install the bolts which hold fuel injector pipe LH
to cylinder head.
Tightening torque:
19 N·m (1.9 kgf-m, 14 ft-lb)
6) Install the engine harness to fuel injector pipe
LH.
7) Install the fuel pipe protector LH.
Tightening torque:
19 N·m (1.9 kgf-m, 14 ft-lb)
8) Connect the fuel hoses to fuel pipe.
9) Connect the brake booster hose.
10) Connect the PCV hose.
FU-02120
FU-02119
FU-02118
FU-02117
ME-02384
ME-02655
EC-02133

FU(H6DO)-15
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
11) Connect the engine coolant hoses to throttle
body.
12) Connect the connector to throttle body.
13) Install the generator. INSTALLATION, Generator.>
14) Install the air cleaner case and air intake cham-
ber. Cleaner Case.> TION, Air Intake Chamber.>
15) Install the fuse of fuel pump to main fuse box.
16) Connect the ground cable to the battery.
17) Install the collector cover.
C: DISASSEMBLY
1) Remove the engine harness from intake mani-
fold.
2) Remove the throttle body. 11, REMOVAL, Throttle Body.>
3) Remove the manifold absolute pressure sensor.
solute Pressure Sensor.>
4) Remove the purge control solenoid valve. to EC(H6DO)-6, REMOVAL, Purge Control Sole-
noid Valve.>
5) Loosen the clamp which holds fuel injector pipe
to fuel hose, and then disconnect the pipe from fuel
hose.
6) Remove the bolts which install fuel pipes on in-
take manifold.
FU-02114
FU-02487FU-02124
FU-02125
FU-02126

FU(H6DO)-16
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
D: ASSEMBLY
NOTE:
When assembling the nipple, apply liquid gasket.
Liquid gasket:
THREE BOND 1105 (Part No.004403010)
1) Tighten the bolts which install fuel pipes on in-
take manifold.
Tightening torque:
6.4 N·m (0.65 kgf-m, 4.7 ft-lb)
2) Connect the fuel injector pipe to fuel hose, and
tighten the clamp screw.
Tightening torque:
1.5 N·m (0.15 kgf-m, 1.1 ft-lb)
3) Install the purge control solenoid valve. EC(H6DO)-6, INSTALLATION, Purge Control So-
lenoid Valve.>
4) Install the manifold absolute pressure sensor.
Absolute Pressure Sensor.>
5) Install the throttle body to intake manifold. to FU(H6DO)-11, INSTALLATION, Throttle Body.>
6) Install the engine harness to the intake manifold.
E: INSPECTION
Make sure the fuel pipe and fuel hoses are not
damaged and the connections are tightened firmly.
FU-02125
FU-02126
FU-02124