2001 TOYOTA PRIUS Service Repair Manual

I19078
DEF
FACE
1
2
3
DI±910
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2001 PRIUS (RM778U)
2 Check air outlet damper position sensor.
PREPARATION:
Remove air outlet servomotor (See page AC±57).
CHECK:
Measure resistance between terminals 1 and 2 of air outlet ser-
vomotor assembly connector.
OK:
Resistance : 4.2 ± 7.8 kW
CHECK:
While operating air outlet damper control servomotor as in the
procedure on page DI±912, measure resistance between ter-
minals 2 and 3 of air outlet damper control servomotor.
OK:
Resistance:
Damper PositionResistance
DEF3.6 ± 6.7 kW
FACE0.6 ± 1.1 kW
HINT:
As the air outlet servomotor moves from DEF side to FACE side,
the resistance decreases gradually without interruption.
NG Replace air outlet control servomotor assem-
bly.
OK
3 Check harness and connector between A/C amplifier and air outlet control servo-
motor assembly (See page IN±41).
NG Repair or replace harness or connector.
OK
Check and replace A/C amplifier.

I18391
A/C Amplifier
AMC A914
W II19
AMH A913
IG A71
GND A77 L
F18
FL Block No. 2
BatteryA15
Air Mix Control
Servomotor
Instrument Panel J/B
I15
Ignition
SW 4
BR±R
J20
J/C
C 5
W II1 10
C
R R 2D3
2H1
2D6
2K8
2B3
8
2D HTR
IG1 Relay
AM1B±Y
J/C 35
214
W±GIG1
AM1
2 W
W±B J25A
J24A
W±B
A
J11
J/C
ID MAINFL Block No. 1
F111
F131
1
DC/DC
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±911
2001 PRIUS (RM778U)
DTC 41 Air Mix Control Servomotor Circuit
CIRCUIT DESCRIPTION
This air mix control servomotor is controlled by the A/C amplifier and moves the air mix damper to the desired
position.
DTC No.Detection ItemTrouble Area

Air mix control servomotor.
41Air mix damper position sensor value does not change even if
Air mix control servomotor.

Air mix damper position sensor.
H t b t A/C lifi d i i41Air mix dam er osition sensor value does not change even if
A/C amplifier operates air mix control servomotor.
Harness or connector between A/C amplifier and air mix con-
trol servomotor, air mix damperposition sensor.trol servomotor, air mix damper position sensor.

A/C amplifier.
WIRING DIAGRAM
DI7SF±01

Max. COOL e 20.5 (66)
21.0 e 23.5 (67 e72)±10 % (Fully closed)Cool air comes out Temp. Setting °C (°F)Air Mix Damper
Condition
24.0 e 26.0 (73 e77)
26.5 e 29.0 (78 e83)
29.5 (84) eMax. WARM100 % (Fully opened)
""
50 %
"
Warm air comes out
DI±912
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2001 PRIUS (RM778U)
INSPECTION PROCEDURE
1 Actuator check.
PREPARATION:
(a) Warm up the engine.
(b) Set to the actuator check mode (See page DI±866).
CHECK:
Operate the temperatur control switch and check the operation of the air mix damper and the condition of
the blower.
OK:
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±874).
NG

I19079
To COOL54
(±)
(+)
I19080
54
(±)
(+)
To WARM
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±913
2001 PRIUS (RM778U)
2 Check air mix control servomotor.
PREPARATION:
Remove air mix control servomotor (See page AC±56).
CHECK:
Connect positive (+) lead to terminal 4 and the negative (±) lead
to terminal 5.
OK:
The lever turns smoothly to COOL side.
CHECK:
Connect negative (±) lead to terminal 4 and positive (+) lead to
terminal 5.
OK:
The lever turns smoothly to WARM side.
NG Replace air mix control servomotor.
OK
3 Check harness and connector between A/C amplifier and air mix control servo-
motor (See page IN±41).
NG Repair or replace harness or connector.
OK
Check and replace A/C amplifier.