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DI-612
DIAGNOSTICS - AIR CONDITIONING SYSTEM
DI3W7-07
DTC 41 Air Mix Control Servomotor Circuit
CIRCUIT DESCRIPTION
This air mix control servomotor is controlled by the A/C control assembly and moves the air mix damper to
the desired position.
DTC No. Detection Item Trouble Area
S Air mix control servomotor
S Air mix damper position sensor
Air mix damper position sensor value does not change even if
41 S Harness or connector between A/C control assembly and air
A/C control assembly o erates air mix control servomotor.
operates
mix control servomotor, air mix damper position sensor
S A/C control assembly
WIRING DIAGRAM
Driver Side J/B Center J/B A/C Amplifier
GAUGE
2 5 9 2 26
B-Y B-Y
1I 1F 3D 3D A31 IG+
B-Y 9
I14 Engine Room R/B R
Ignition Switch A31 AMH
AM1 4
4 AM1 2
2 A36
IG1 W 2 1
Air Mix M
W 1 2 Control
2
Servomotor
ALT 2
8
Battery A31 AMC
W
J/C Center J/B
J9
16 17 14
A
3E 3E A31 GND
W-B W-B
IF
I09247
2002 4RUNNER (RM887U)
Author : Date : 788
DI-613
DIAGNOSTICS - AIR CONDITIONING SYSTEM
INSPECTION PROCEDURE
1 Actuator check
PREPARATION:
(a) Warm up the engine.
(b) Set to the actuator check mode (See page DI-578 ).
(c) Press the DEF switch and change it to step operation.
CHECK:
Press the DEF switch and check the operation of the air mix damper and the condition of the blower.
OK:
Display Code Air Mix Damper Condition
0-3 0 % (Fully closed) Cool air comes out
4-5 50 %
6-9 100 % (Fully opened) Warm air comes out
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI-586 ).
NG
2002 4RUNNER (RM887U)
Author : Date : 789
DI-614
DIAGNOSTICS - AIR CONDITIONING SYSTEM
2 Check air mix control servomotor.
PREPARATION:
1 Remove air mix control servomotor (See page AC-34 ).
To Cool
CHECK:
Connect positive (+) lead to terminal 1 and the negative (-) lead
to terminal 2.
2 OK:
(+) (-) The lever turns smoothly to COOL side.
B
I09230
CHECK:
1 Connect negative (-) lead to terminal 1 and positive (+) lead to
To Hot terminal 2.
OK:
The lever turns smoothly to HOT side.
2
(-) (+)
B
I09229
NG Repair or replace harness or connector.
OK
2002 4RUNNER (RM887U)
Author : Date : 790
DI-615
DIAGNOSTICS - AIR CONDITIONING SYSTEM
3 Check harness and connector between A/C control assembly and air mix control
servomotor (See page IN-28 ).
NG Repair or replace harness or connector.
OK
Check and replace A/C control assembly
(See page IN-28 ).
2002 4RUNNER (RM887U)
Author : Date : 791
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