Page 1201 of 5135
I36144
MGV
A16A15
I36136
05±1158
±
DIAGNOSTICS AIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
1INSPECT AIR CONDITIONING AMPLIFIER
(a)Remove the A/C amplifier with connectors being con- nected.
(b)Measure the voltage between terminals MGV of the A/C amplifier and body ground.
Standard:
Recirculation switchVoltage (V)
OperateBelow 1.0
Not OperateNo Continuity
OKPROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG
2INSPECT W/RECEIVER CONDENSER ASSY
(a)Apply voltage between terminals and check that the re- frigerant passages switch.
NGREPLACE W/RECEIVER CONDENSER ASSY
OK
3CHECK WIRE HARNESS(W/RECEIVER CONDENSER ASSY ± AIR CONDITIONING AMPLIFIER)
(a)Check for an open or short circuit in harness and connector between w/ receive\
r condenser assy and
A/C amplifier (See page 01±32).
NG REPAIR OR REPLACE WIRE HARNESS
OK
REPLACE AIR CONDITIONING AMPLIFIER
Page 1202 of 5135
I35397
R±W (*1)1
CB A15 RECR±Y A21
Air Inlet Control
Servo Motor
5 A/C Control Assembly
3 Center J/B
Driver Side J/B
From
HTR Fuse J266
CER±W (*1)
+
1
R±W (*2)
A15 FRS P±B6
R±W (*2)
J26 HHJ/C
2
R±W (*2)
R±W (*2)
DC6
*1: LHD
*2: RHD
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1153
AVENSIS REPAIR MANUAL (RM1018E)
RECIRCULATION DAMPER SERVOMOTOR CIRCUIT
CIRCUIT DESCRIPTION
The recirculation damper servomotor is controlled by the A/C amplifier and moves the air inlet damper to the
desired position.
WIRING DIAGRAM
05C7Q±01
Page 1203 of 5135
05±1154
±
DIAGNOSTICS AIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
1PERFORM ACTUATOR CHECK
(a)Set to actuator check mode (See page 05±1091).
(b) Press the DEF switch and change to step operation.
(c) Check the air flow temperature by hand.
Display codeRecirculation damper position
0FRESH
1FRESH
2FRESH
3FRESH
4RECIRCULATION
5RECIRCULATION
6RECIRCULATION
7RECIRCULATION
8RECIRCULATION
9RECIRCULATION
NG PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE
OK
Page 1204 of 5135
I36092
LHD Models:
FRSREC
I36094
I36093
RHD Models:
FRS
REC
I36094
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1155
AVENSIS REPAIR MANUAL (RM1018E)
2 INSPECT RECIRCULATION DAMPER SERVO SUB±ASSY
(a) Remove the recirculation damper servo sub±assy.
(b) Connect the positive (+) lead to from the battery to termi-
nal 3 and negative (±) lead to terminal 2, then check that
the arm turns to ºFRSº side smoothly.
(c) Connect the positive (+) lead to from the battery to termi-
nal 3 and negative (±) lead to terminal 1, then check that
the arm turns to ºRECº side smoothly.
If operattions are not as specified, replace the mode damper
servomotor.
NG REPLACE RECIRCULATION DAMPER SERVO
SUB±ASSY
OK
Page 1205 of 5135
I36144
FRSREC
A16A15
05±1156
±
DIAGNOSTICS AIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
3CHECK HARNESS AND CONNECTOR(RECIRCULATON DAMPER SERVO SUB±ASSY ± BATTERY)
(a)Check for an open or short circuit in harness and connector between recircula\
tion damper and battery
+ terminal (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
4 INSPECT AIR CONDITIONING AMPLIFIER(REC, FRS)
(a) Remove A/C amplifier with connectors being connected.
(b) Measure the voltage between terminal FRS of A/C ampli- fier and body ground when recirculation switch is oper-
ated, as shown in the table.
Standard:
Recirculation switchVoltage (V)
FRESHBelow 1.0
RECIRCULATION10 to 14
(c) Measure voltage between terminal REC of A/C amplifierand body ground when recirculation switch is operated,
as shown in the table.
Standard:
Recirculation switchVoltage (V)
FRESH10 to 14
RECIRCULATIONBelow 1.0
NG REPLACE AIR CONDITIONING AMPLIFIER
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR
Page 1206 of 5135
I35381
R±W
R±WR±W HF
J26 J27
IK2 IK2A15 SOL+ RR J/CC3
Compressor
Assembly
38A/C Control Assembly
(*2)
(*2)
R±W
(*1)21
Center J/B
R±W
(*1)1
CB9
CJ
Driver Side J/B
6
DCFrom
HTR
Fuse
*1: LHD
*2: RHD 2
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1151
AVENSIS REPAIR MANUAL (RM1018E)
AIR CONDITIONER MAGNETIC VALVE CIRCUIT
CIRCUIT DESCRIPTION
The air conditioner magnetic valve is controlled by A/C amplifier.
WIRING DIAGRAM
05C7P±01
Page 1207 of 5135
I36135
05±1152
±
DIAGNOSTICS AIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1PERFORM ACTUATOR CHECK
(a)Set the actuator check mode (See page 05±1091).
(b)Press the DEF switch and change to the step operation.
(c)Check the air flow level by hand.
Display CodeBlower level
0ON
1ON
2OFF
3OFF
4OFF
5OFF
6OFF
7OFF
8OFF
9OFF
OKPROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE
NG
2INSPECT AIR CONDITIONER MAGNETIC VALVE
(a)Measure the resistance between terminals 1 and 2. Standard: 10 to 11 at 25 C (77 F)
If the resistance is not as specified, replace the compressor
assy.
NGREPLACE W/PULLEY COMPRESSOR ASSY
OK
3CHECK HARNESS AND CONNECTOR(A/C AMPLIFIER ± BATTERY)
(a)Check for an open or short circuit in harness and connector between terminal \
SOL+ of A/C amplifier and battery + terminal (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
REPLACE AIR CONDITIONING AMPLIFIER
Page 1208 of 5135
I36148
Duty Ratio =A + BA
x 100 (%)
ON 0 VOFF 5 VA
1 cycle Blower Level (Reference)
Si duty (%)
B HI
M8
M7
M6
M5
M4
M3
M2
M1
LO
26.3
30.937.8
44.751.6
58.465.3
74.583.7 100.0
I36133
B5
Blower Motor
Controller
A/C Control Assembly
SI
+B
VM
GND2
3
4
1LB
M
2
1 L±BL±BR
Driver Side J/B
DF2From
HTR
RELAY
L±B
J15
J/C A
IK5
A16 BLW L±B
2
IJ2
1
IJ2
4
IJ2 B±WB
W±B 3
IJ2
B4
Blower Motor
W±B 05±1148
± DIAGNOSTICSAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
BLOWER MOTOR CIRCUIT
CIRCUIT DESCRIPTION
The blower motor is operated by signals from the A/C amplifier. Blower motor speed signals are transmitted
by changes in the Duty Ratio.
Duty Ratio
The duty ratio is the ratio of the period of continuity in one cycle. For example, if A is the period of continuity
in one cycle, and then B is the period of non±continuity.
WIRING DIAGRAM
05C7O±01