Page 2780 of 4323

B17464
3 2 1
45
±20 0 20 40 60 80 100 0.1 0.2 0.3 0.51
2 3 5 10 20 30
TEMPERATUREC(F)
RESISTANCE kW
(±4) (32) (68) (140)(104)(212)
(176)
Air
E2 THA VG E2G
+B
Acceptable
SF0P2±09
B17465
Air
B17466
ECM
VG
E2G
Voltmeter
SF±38
± SFIMASS AIR FLOW (MAF) METER
2772 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION
1. INSPECT OUTPUT VOLTAGE
(a) Apply battery voltage across terminals 1 (+B) and 2
(E2G).
(b) Connect the positive (+) tester probe to terminal 3 (VG),
and the negative (±) tester probe to terminal 2 (E2G).
(c) Blow air into the MAF meter, and check if the voltage fluc-
tuates.
2. INSPECT RESISTANCE
Using an ohmmeter, measure the resistance between terminals
4 (THA) and 5 (E2).
Resistance:
12.5 to 16.9 kW at ±20C (±4F)
2.19 to 2.67 kW at 20C (68F)
0.50 to 0.68 kW at 60C (140F)
3. INSPECT MASS AIR FLOW METER
(a) If using a hand±held tester:
(1) Connect the hand±held tester to the DLC3.
(2) Turn the ignition switch to the ON position.
(3) Blow air into the MAF meter, and check that the air
flow value of the CURRENT DATA changes.
If operation is not as specified, check the MAF meter (see page
DI±110 and DI±113) as well as the wiring and the ECM.
(b) If not using a hand±held tester:
(1) Turn the ignition switch to the ON position.
(2) Connect the positive tester probe of the voltmeter
to terminal VG of the ECM and the negative tester
probe of the voltmeter to terminal E2G of the ECM.
(3) Blow air into the air flow meter, and check if the volt-
age fluctuates.
If operation is not as specified, check the MAF meter (see page
DI±110 and DI±113), the wiring and the ECM.
Page 2789 of 4323
SF0PB±02
B01689
12
When battery positive voltage is applied.
When battery positive voltage is cut off.Valve moves in direction.
Valve moves in direction.
± SFICAMSHAFT TIMING OIL CONTROL VALVE
SF±47
2781 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION
INSPECT OIL CONTROL VALVE OPERATION
Connect the positive lead to terminal 1 of the connector and
the negative lead to terminal 2, then check the movement of
the valve.
If operation is not as specified, replace the oil control valve.
Page 2796 of 4323

SF1XO±01
B17511
S04525
Continuity Ohmmeter
S04524
No continuity Ohmmeter
FI6393
Air
E
Filter
S04523
Air
E
F
Battery SF±54
± SFIACOUSTIC CONTROL INDUCTION SYSTEM (ACIS)
2788 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION
1. INSPECT INTAKE AIR CONTROL VALVE
(a) With 39.9 kPa (300 mmHg, 11.8 in.Hg) of vacuum applied
to the actuator, check that the actuator rod moves.
(b) One minute after applying the vacuum in step (a), check
that the actuator rod does not return.
If the operation is not as specified, replace the intake manifold.
2. INSPECT VSV
(a) Using an ohmmeter, check that there is continuity be-
tween each terminal.
Resistance: 33 to 39 W at 20°C (68°F)
If there is no continuity, replace the VSV.
(b) Using an ohmmeter, check that there is no continuity be-
tween each terminal and the body.
If there is continuity, replace the VSV.
(c) Check that air flows from port E to the filter.
(d) Apply battery voltage across the terminals.
(e) Check that air flows from port E to port F.
If operation is not as specified, replace the VSV.
Page 2798 of 4323
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
Page 2799 of 4323
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
Page 2800 of 4323
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
Page 2801 of 4323
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
Page 2805 of 4323
B16402
Ohmmeter
Continuity
SF0PJ±10
B16403
Ohmmeter
No Continuity
B16404
Air
B16405Battery Air
± SFIVSV FOR EVAPORATIVE EMISSION (EVAP)
SF±63
2797 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION
1. REMOVE VSV
2. INSPECT VSV
(a) Inspect the VSV for open circuit.
Using an ohmmeter, check that there is continuity be-
tween the terminals.
Resistance: 30 to 34 W at 20°C (68°F)
If there is no continuity, replace the VSV.
(b) Inspect the VSV for ground.
Using an ohmmeter, check that there is no continuity be-
tween each terminal and the body.
If there is continuity, replace the VSV.
(c) Inspect the VSV operation.
(1) Check that air dose not flow from port.
(2) Apply battery positive voltage across the terminals.
(3) Check that air flows from port.
If operation is not as specified, replace the VSV.
3. REINSTALL VSV