I03770
1
2
4
3
Low Pressure Cut Side
Reference : High Pressure Cut Side
ON (continuity)
OFF (continuity)
196 kPa
ON (continuity)
OFF (continuity)
211 kPa
3,140 kPa
2,550 kPa
-
DIAGNOSTICS
AIR CONDITIONING SYSTEM
DI-723
877
Author:
Date:
2001 SIENNA (RM787U)
2
Check pressure switch.
PREPARATION:
Disconnect pressure switch connector.
CHECK:
(a)
Turn ignition switch ON.
(b)
Check continuity between terminals 1 and 4 of pressure
switch when refrigerant pressure is changed.
OK:
The continuity changes with refrigerant pressure as
shown below.
NG
Replace pressure switch.
OK
3
Check harness and connector between A/C control assembly and pressure
switch (See page
).
NG
Repair or replace harness or connector.
OK
Check and replace A/C control assembly.
