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11-4
FUEL - FUEL SYSTEM
110SX-01
ON-VEHICLE INSPECTION
1. CHECK FUEL PRESSURE
Fuel Tube Connector (a) Discharge fuel system pressure.
(See page 11-1 )
(b) Check that the battery voltage is above 12 V.
(c) Disconnect the negative (-) battery cable.
(d) Pull out the connecter from a new fuel tube.
HINT:
Part No. 23801-20171
A50710
(e) Disconnect the fuel tube clamp from the fuel tube connec-
tor.
Fuel Pipe
Clamp No.1 A60083
(f) Disconnect the fuel tube connector from the fuel pipe
A while pinching part A with fingers as shown in the illustra-
tion.
CAUTION:
S After taking the precautions, disconnect the fuel tube
connector (quick type).
A S As there is retained pressure in the fuel line, prevent
it from splashing inside the vehicle compartment.
B12941
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2253
11-5
FUEL - FUEL SYSTEM
(g) Install SST (pressure gauge) using SST and a fuel tube
connector as shown in the illustration.
SST SST 09268-41047(95366-08070),09268-45014
(T-Joint) (09268-41250, 09268-41200, 09268-41220)
SST (h) Wipe up any gasoline.
SST (i) Reconnect the negative (-) battery cable.
(Hose) (j) Connect the hand-hand tester to the DLC3.
SST
(k) Measure the fuel pressure.
(Hose) Fuel pressure:
304 to 343 kPa (3.1 to 3.5 kgf/cm2, 44 to 50 psi)
If the pressure is high, replace the fuel pressure regulator.
If the pressure is low, check the fuel hoses connections, the fuel
Fuel Inlet Tube pump, the fuel filter and the fuel pressure regulator.
(l) Disconnect the hand-held tester from the DLC3.
(m) Start the engine.
(n) Measure the fuel pressure at idle.
Fuel Tube Fuel pressure:
Connector 304 to 343 kPa (3.1 to 3.5 kgf/cm2, 44 to 50 psi)
A71359 (o) Stop the engine.
(p) Check that the fuel pressure remains as specified for 5
minutes after the engine has stopped.
Fuel pressure: 147 kPa (1.5 kgf/cm2, 21psi)
If the pressure is not as specified, check the fuel pump, the
pressure regulator and/or the injectors.
(q) After checking the fuel pressure, disconnect the negative
(-) battery cable and carefully remove SST and the fuel
tube connector to prevent gasoline from splashing.
(r) Reconnect the fuel inlet tube (fuel tube connector).
CAUTION:
After taking the precautions, connect the fuel tube con-
necter (quick type).
2. CHECK FUEL PUMP OPERATION AND FUEL LEAK
(a) When using hand-held tester.
(1) Connect the hand-held tester to the DLC3.
(2) Turn the ignition switch ON and hand-held tester
main switch ON.
NOTICE:
Do not start the engine.
(3) Select the ACTIVE TEST mode on the hand-held
tester. If you need a help to select the ACTIVE
TEST mode, refer to the hand-held tester user's
manual.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2254
11-6
FUEL - FUEL SYSTEM
Engine Room Relay Block (b) When not using hand-held tester.
(1) Remove the circuit opening relay.
Circuit Opening Relay
(2) Using a service wire, connect terminals FP and +B
of the relay block.
NOTICE:
Pay due attention to the terminal connecting position to
avoid a malfunction.
(3) Turn the ignition switch ON and check that the fuel
+B FP pump operates.
NOTICE:
Do not start the engine.
(c) Check that there are no fuel leaks after doing mainte-
nance anywhere on the fuel system.
A75336
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2255
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