Lexus RX300 (MCU15). Manual - part 191
B04398
No.1 Water
Temperature Switch
CO15V–01
P01924
Ohmmeter
B04397
No.2 Water
Temperature
Switch
P06722
Ohmmeter
–
COOLING
WATER TEMPERATURE SWITCH
CO–33
LEXUS RX300 (RM785E)
WATER TEMPERATURE SWITCH
INSPECTION
1.
DRAIN ENGINE COOLANT
2.
INSPECT NO.1 WATER TEMPERATURE SWITCH
(a)
Remove the No.1 water temperature switch.
(b)
Inspect the No.1 water temperature switch.
(1)
Using an ohmmeter, check that there is continuity
between the terminals when the coolant tempera-
ture is above 98
°C (208°F).
If there is no continuity, replace the switch.
(2)
Check that there is no continuity, between the termi-
nals when the coolant temperature is below 88
°C
(190
°F).
If there is continuity, replace the switch.
(c)
Reinstall the No.1 water temperature switch.
3.
INSPECT NO.2 WATER TEMPERATURE SWITCH
(a)
Remove the No.2 water temperature switch.
(b)
Inspect the No.2 water temperature switch.
(1)
Using an ohmmeter, check that there is continuity
between terminals when the coolant temperature is
above 94
°C (201°F).
If there is no continuity, replace the switch.
(2)
Check that there is no continuity between the termi-
nals when the coolant temperature is below 83
°C
(181
°F).
If there is continuity, replace the switch.
(c)
Reinstall the No.2 water temperature switch.
4.
REFILL ENGINE COOLANT
5.
START ENGINE AND CHECK FOR COOLANT LEAKS