2005 LEXUS ES300 relay

A84683
OhmmeterBattery
- EMISSION CONTROLEMISSION CONTROL SYSTEM (3MZ-FE)
12-15
2076 Author
: Date
:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
7. INSPECT AIR FUEL RATIO SENSOR HEATER RELAY
(a) Inspect the resistance.
(1) Using an ohmmeter, measure the resistance be-
tween the terminals.
Standard:
Tester ConnectionSpecified Condition
3 - 510 kW or higher
3 - 5Below 1W
(Apply battery voltage to terminals 1 and 2
If the result is not as specified, replace the air fuel ratio sensor
heater relay.

160QD-01
A86555
A86554
A86556
B09432
- COOLINGCOOLING FAN SYSTEM (3MZ-FE)
16-5
2283 Author
: Date
:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
COOLING FAN SYSTEM (3MZ-FE)
ON-VEHICLE INSPECTION
1. CHECK COOLING FAN OPERATION AT LOW TEM-
PERATURE (Below 83
C (181
F))
(a) Turn the ignition switch ON.
(b) Check that the fan and fan No. 2 stops.
If not, check the cooling fan relays and temperature detect
switches.
(c) Disconnect the temperature detect switch connector.
(d) Connect the terminals of the temperature detect switch
wire connector.
(e) Check that the fan rotates at high speed.
If not, check the cooling fan relay and fan.
(f) Reconnect the temperature detect switch connector.
(g) Disconnect the temperature detect switch No. 2 connec-
tor.
(h) Ground the terminal on the temperature detect switch No.
2 wire harness side connector.

A86557
A86558
Ammeter
Battery
A86559
Ammeter
Battery 16-6
- COOLINGCOOLING FAN SYSTEM (3MZ-FE)
2284 Author
: Date
:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
(i) Check that the fan and fan No. 2 rotates at low speed.
If not, check the cooling fan relay No. 2, cooling fan relay No.
3 and No. 2 fan.
(j) Reconnect the temperature detect switch No. 2 connec-
tor.
2. INSPECT FAN
(a) Disconnect the fan connector.
(b) Connect battery and ammeter to the fan connector.
(c) Check that the fan rotates smoothly, then check the read-
ing on the ammeter.
Standard amperage: 10.2 to 16.2 A at 20
C (68
F)
(d) Reconnect the fan connector.
3. INSPECT NO. 2 FAN
(a) Disconnect the No. 2 fan connector.
(b) Connect the battery and ammeter to the No. 2 fan con-
nector.
(c) Check that the No. 2 fan rotates smoothly, then check the
reading on the ammeter.
Standard amperage: 10.2 to 16.2 A at 20
C (68
F)
(d) Reconnect the No. 2 fan connector.

160QE-01
A86576
Ohmmeter
A86577
Ohmmeter Battery
A86578
Ohmmeter Ohmmeter
A86579
Ohmmeter OhmmeterBattery
- COOLINGCOOLING FAN SYSTEM (3MZ-FE)
16-7
2285 Author
: Date
:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
INSPECTION
1. INSPECT COOLING FAN RELAY
(a) Check the continuity.
(1) Using an ohmmeter, check for continuity between
the terminals.
Standard:
Tester ConnectionSpecified Condition
1 - 2Continuity
3 - 5No continuity
If the result is not as specified, replace the cooling fan relay.
(b) Check the operation.
(1) Apply battery positive voltage across terminals 1
and 2.
(2) Using an ohmmeter, check that there is continuity
between terminals 3 and 5.
If there is no continuity, replace the cooling fan relay.
2. INSPECT COOLING FAN RELAY NO.2
(a) Check the continuity.
(1) Using an ohmmeter, check for continuity between
the terminals.
Standard:
Tester ConnectionSpecified Condition
1 - 2Continuity
3 - 4Continuity
3 - 5No continuity
If the result is not as specified, replace the cooling fan relay.
(b) Check the operation.
(1) Apply battery positive voltage across terminals 1
and 2.
(2) Using an ohmmeter, check that there is no continu-
ity between terminals 3 and 4.
If there is continuity, replace the cooling fan relay.
(3) Using an ohmmeter, check that there is continuity
between terminals 3 and 5.
If there is no continuity, replace the cooling fan relay.

A86576
Ohmmeter
A86577
Ohmmeter Battery
A86580
Ohmmeter
A86581
Ohmmeter 16-8
- COOLINGCOOLING FAN SYSTEM (3MZ-FE)
2286 Author
: Date
:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
3. INSPECT COOLING FAN RELAY NO.3
(a) Check the continuity.
(1) Using an ohmmeter, check for continuity between
the terminals.
Standard:
Tester ConnectionSpecified Condition
1 - 2Continuity
3 - 5No continuity
If the result is not as specified, replace the cooling fan relay.
(b) Check the operation.
(1) Apply battery positive voltage across terminals 1
and 2.
(2) Using an ohmmeter, check that there is continuity
between terminals 3 and 5.
If there is no continuity, replace the cooling fan relay.
4. INSPECT TEMPERATURE DETECT SWITCH
(a) Check the continuity.
(1) Using an ohmmeter, check for continuity between
the terminals.
Standard:
Coolant TemperatureSpecified Condition
Above 98
C (208
F)Continuity
Below 88
C (190
F)No continuity
If the result is not as specified, replace the temperature detect
switch.
5. INSPECT TEMPERATURE DETECT SWITCH NO.2
(a) Check the continuity.
(1) Using an ohmmeter, check for continuity between
the terminals.
Standard:
Coolant TemperatureSpecified Condition
Above 93
C (199
F)Continuity
Below 83
C (181
F)No continuity
If the result is not as specified, replace the temperature detect
switch.

A79718
A86237
Terminal 30
Terminal 50Battery Ammeter
Body
A86241
Battery
Ohmmeter 19-2
- STARTING & CHARGINGSTARTING SYSTEM (3MZ-FE)
2334 Author
: Date
:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
(d) Perform the no-load performance test.
(1) Connect the lead wire to terminal C. Make sure that
the lead is not grounded.
Torque: 10 NVm (102 kgfVcm, 7 ftVlbf)
(2) Clamp the starter in a vise.
(3) Connect the battery and an ammeter to the starter
as shown in the illustration.
(4) Check that the starter rotates smoothly and steadily
with the clutch pinion gear extended. Check that the
ammeter reads the specified current.
Specified current: 90 A or less at 11.5 V
If the current is not as specified, replace the starter.
2. INSPECT STARTER RELAY ASSY
(a) Inspect the resistance.
(1) Using an ohmmeter, measure the resistance be-
tween the terminals.
Standard:
Tester ConnectionSpecified Condition
3 - 510 kW or higher
3 - 5Below 1W
(Apply battery voltage to terminals 1 and 2
If the result is not as specified, replace the starter relay.