2001 TOYOTA SEQUOIA relay

FI2553
SST
B16498
New Gasket
SF±2
± SFISFI SYSTEM
2736 Author: Date:
2005 SEQUOIA (RM1146U)
(b) When installing the battery, be especially careful to cor-
rectly connect the positive (+) and negative (±) cables.
(c) Do not give a severe impact to the SFI parts during remov-
al or installation. Handle all SFI parts carefully, especially
the ECM.
(d) Be careful during troubleshooting. Numerous transistor
circuits are used and even slight terminal contact can
cause further trouble.
(e) Do not open the ECM cover.
(f) When inspecting during rainy weather, take care to pre-
vent entry of water. Also, when washing the engine
compartment, prevent water from getting into the SFI
parts and wiring connectors.
(g) Parts should be replaced as an assembly.
(h) Care should be taken when pulling out and inserting wir-
ing connectors.
(1) Release the lock and pull out the connector, pulling
on the connectors.
(2) Fully insert the connector and check that it is locked.
(i) Use SST for inspection or test of the injector or its wiring
connector.
SST 09842±30070
8. FUEL SYSTEM
(a) When disconnecting the high fuel pressure line, a large
amount of gasoline will spill out. Observe the following
procedures:
(1) Disconnect the circuit opening relay.
(2) Start the engine. After the engine has stopped on
its own, turn the ignition switch off.
(3) Put a container under the connecting part of the
pressure line.
(4) Slowly loosen the connection.
(5) Disconnect the high fuel pressure line.
(6) Reconnect the fuel pump connector.
(b) When connecting the union bolt (fuel pressure pulsation
damper) on the high pressure pipe union, observe the fol-
lowing procedures:
(1) Always use 2 new gaskets.
(2) Tighten the union bolt by hand.

D13872
Hand±Held Tester
DLC3
CAN VIM
SF12Y±05
B16497
Up
Pulsation
DamperScrew
B16528
SST
(Gauge)
Front
Fuel
Pipe
Gasket SST
(Union)SST
(Adaptor)
± SFIFUEL PUMP
SF±7
2741 Author: Date:
2005 SEQUOIA (RM1146U)
FUEL PUMP
ON±VEHICLE INSPECTION
1. CHECK FUEL PUMP OPERATION
(a) Connect a hand±held tester to the Controller Area Net-
work Vehicle Interface Module (CAN VIM). Then connect
the CAN VIM to the Date Link Connector 3 (DLC3).
(b) Turn the ignition switch ON, and push the hand±held tes-
ter main switch ON.
NOTICE:
Do not start the engine.
(c) Enter the following menus: DIAGNOSIS / ENHANCED
OBDII / ACTIVE TEST / FUEL PUMP / SPD
(d) Please refer to the hand±held tester operator's manual
for further details.
(e) Check that the pulsation damper screw rises when the
fuel pump operates.
If operation is not as specified, check the fusible link, fuses, EFI
main relay, fuel pump, ECM and wiring connections.
(f) Turn the ignition switch off.
(g) Disconnect the hand±held tester and CAN VIM from the
DLC3.
2. CHECK FUEL PRESSURE
(a) Check the battery positive voltage is 12 V or more.
(b) Disconnect the negative (±) terminal cable from the bat-
tery.
(c) Remove the front fuel pipe from the LH delivery pipe. (See
page SF±27)
(d) Install the front fuel pipe and SST (pressure gauge) to the
delivery pipe with the 3 lower gaskets and SST (adaptor).
SST 09268±45014 (09268±41190, 90405±06167)
Torque: 39 N´m (400 kgf´cm, 29 ft´lbf)
(e) Wipe off any splattered gasoline.
(f) Reconnect the negative (±) terminal cable to the battery.
(g) Connect a hand±held tester to the DLC3. (See step 1 in
check fuel pump operation (a) to (e))

SF1XQ±01
S04947
Continuity
Ohmmeter
Ohmmeter
No Continuity 12
35
S04946
BatteryOhmmeter
Continuity 12
35
SF±56
± SFIEFI MAIN RELAY
2790 Author: Date:
2005 SEQUOIA (RM1146U)
EFI MAIN RELAY
INSPECTION
1. REMOVE RELAY BOX COVER
2. REMOVE EFI MAIN RELAY (Marking: EFI)
3. INSPECT EFI MAIN RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity be-
tween terminals 1 and 2.
If there is no continuity, replace the relay.
(b) Check that there is no continuity between terminals 3 and
5.
If there is continuity, replace the relay.
4. INSPECT EFI MAIN RELAY OPERATION
(a) Apply battery voltage across terminals 1 and 2.
(b) Using an ohmmeter, check that there is continuity be-
tween terminals 3 and 5.
If there is no continuity, replace the relay.
5. REINSTALL EFI MAIN RELAY
6. REINSTALL RELAY BOX COVER

SF1XR±01
S04947
Continuity
Ohmmeter
Ohmmeter
No Continuity 12
35
S04946
BatteryOhmmeter
Continuity 12
35
± SFIA/F SENSOR HEATER RELAY
SF±57
2791 Author: Date:
2005 SEQUOIA (RM1146U)
A/F SENSOR HEATER RELAY
INSPECTION
1. REMOVE RELAY BOX COVER
2. REMOVE A/F SENSOR HEATER RELAY (Marking: A/F
HTR)
3. INSPECT A/F SENSOR HEATER RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity be-
tween terminals 1 and 2.
If there is no continuity, replace the relay.
(b) Check that there is no continuity between terminals 3 and
5.
If there is continuity, replace the relay.
4. INSPECT A/F SENSOR HEATER RELAY OPERATION
(a) Apply battery voltage across terminals 1 and 2.
(b) Using an ohmmeter, check that there is continuity be-
tween terminals 3 and 5.
If there is no continuity, replace the relay.
5. REINSTALL A/F SENSOR HEATER RELAY
6. REINSTALL RELAY BOX COVER

SF1XS±01
S04947
Continuity
2
1
No Continuity OhmmeterOhmmeter
35
S04946ContinuityOhmmeter
Battery2
1
35
SF±58
± SFICIRCUIT OPENING RELAY
2792 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT OPENING RELAY
INSPECTION
1. REMOVE RELAY BOX COVER
2. REMOVE CIRCUIT OPENING RELAY
(Marking: C/O)
3. INSPECT CIRCUIT OPENING RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity be-
tween terminals 1 and 2.
If there is no continuity, replace the relay.
(b) Check that there is no continuity between terminals 3 and
5.
If there is continuity, replace the relay.
4. INSPECT CIRCUIT OPENING RELAY OPERATION
(a) Apply battery positive voltage across terminals 1 and 2.
(b) Using an ohmmeter, check that there is continuity be-
tween terminals 3 and 5.
If there is no continuity, replace the relay.
5. REINSTALL CIRCUIT OPENING RELAY
6. REINSTALL RELAY BOX COVER

SF1XT±01
B07643
Continuity
2 1 Ohmmeter
Ohmmeter
3
No Continuity5
B07644
2 1
Ohmmeter
3 4
Battery
Continuity
± SFIFUEL PUMP RELAY
SF±59
2793 Author: Date:
2005 SEQUOIA (RM1146U)
FUEL PUMP RELAY
INSPECTION
1. REMOVE RELAY BOX COVER
2. REMOVE FUEL PUMP RELAY (Marking: F/P)
3. INSPECT FUEL PUMP RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity be-
tween terminals 1 and 2.
If there is no continuity, replace the relay.
(b) Check that there is continuity between terminals 3 and 4.
If there is no continuity, replace the relay.
4. INSPECT FUEL PUMP RELAY OPERATION
(a) Apply battery positive voltage across terminals 1 and 2.
(b) Using an ohmmeter, check that there is no continuity be-
tween terminals 3 and 4.
If there is continuity, replace the relay.
5. REINSTALL FUEL PUMP RELAY
6. REINSTALL RELAY BOX COVER

ST0PJ±01
A00968
Continuity
No continuity12
5
3 OhmmeterOhmmeter
A00969
Ohmmeter
Battery 1
2
5
3
Continuity
± STARTINGSTARTER RELAY
ST±17
2891 Author: Date:
2005 SEQUOIA (RM1146U)
STARTER RELAY
INSPECTION
1. REMOVE STARTER RELAY
Remove the relay box cover and starter relay.
2. INSPECT STARTER RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity be-
tween terminals 1 and 2.
If there is no continuity, replace the relay.
(b) Check that there is no continuity between terminals 3 and
5.
If there is continuity, replace the relay.
3. INSPECT STARTER RELAY OPERATION
(a) Apply battery positive voltage across terminals 1 and 2.
(b) Using an ohmmeter, check that there is continuity be-
tween terminals 3 and 5.
If there is no continuity, replace the relay.
4. REINSTALL STARTER RELAY

ST0OT±02
S04972ContinuityNo continuity 12
5
3 Ohmmeter
Ohmmeter Continuity
4
S04971
OhmmeterBattery12
5
3
ContinuityOhmmeter
No Continuity4 ST±18
± STARTINGACC CUT RELAY
2892 Author: Date:
2005 SEQUOIA (RM1146U)
ACC CUT RELAY
INSPECTION
1. REMOVE ACC CUT RELAY
Remove the cowl side trim board LH and ACC cut relay.
2. INSPECT ACC CUT RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity be-
tween terminals 1 and 2.
If there is no continuity, replace the relay.
(b) Check that there is no continuity between terminals 3 and
5.
If there is continuity, replace the relay.
(c) Check that there is continuity between terminals 3 and 4.
If there is no continuity, replace the relay.
3. INSPECT ACC CUT RELAY OPERATION
(a) Apply battery positive voltage across terminals 1 and 2.
(b) Using an ohmmeter, check that there is no continuity be-
tween terminals 3 and 4.
If there is continuity, replace the relay.
(c) Using an ohmmeter, check that there is continuity be-
tween terminals 3 and 5.
If there is no continuity, replace the relay.
4. REINSTALL ACC CUT RELAY