Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 1998-2003 Approved FSM 05 acsy cirearbl
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DI-781
DIAGNOSTICS - AIR CONDITIONING SYSTEM
DI6ES-02
Rear Blower Switch (Front Side) Circuit
WIRING DIAGRAM
Heater Blower Switch A/C Control Assembly
5 OR-G 8
AUTO H8 A24 RRAT
1 V-R 9
HI H8 A24 RROM
W-B
8 18
R
E H8 A24 RG
A14124
2001 SIENNA (RM787U)
Author : Date : 935
DI-782
DIAGNOSTICS - AIR CONDITIONING SYSTEM
INSPECTION PROCEDURE
1 Check voltage between terminals RRAT, RRON of A/C amplifier and body ground.
PREPARATION:
ON RRAT
Remove A/C control assembly with connectors still connected.
CHECK:
(a) Turn ignition switch to ON.
(b) Measure voltage between terminal RRAT, RRON of A/C
amplifier and body ground.
OK:
RRON (+) (-)
Terminal
I20995
Position RRAT Body ground RROM Body ground
OFF Below 1.0 V Below 1.0 V
AUTO Below 1.0 V 10 - 14 V
REAR 10 - 14 V Below 1.0 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI-697 ).
NG
2001 SIENNA (RM787U)
Author : Date : 936
DI-783
DIAGNOSTICS - AIR CONDITIONING SYSTEM
2 Check rear blower switch.
REAR PREPARATION:
OFF AUTO Remove rear blower switch.
CHECK:
Check continuity between terminals of rear A/C main switch
when switch operation as shown in the chart.
OK:
Switch position Tester connection Specified condition
OFF - No continuity
I21143
REAR 1-6-8 Continuity
AUTO 5-6-8 Continuity
NG Replace rear blower switch.
OK
3 Check harness and connector between A/C amplifier and rear A/C main switch
(See page IN-31 ).
NG Repair or replace harness or connector.
OK
Check and replace A/C control assembly.
(See page IN-31 )
2001 SIENNA (RM787U)
Author : Date : 937
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