2005 TOYOTA AVENSIS air conditioning



E50650
I30156
Resistance (k
)
Temperature (
C)
±
DIAGNOSTICS AIR CONDITIONING SYSTEM
05±1111
AVENSIS REPAIR MANUAL (RM1018E)
2INSPECT COOLER THERMISTOR NO.1
(a)Remove the cooler thermistor No.1 (evaporator temp.
sensor).
(b)Check the resistance between terminal 1 and 2 of cooler thermistor No.1 (evaporator temp. sensor) at each tem-
perature, as shown in the chart.
Standard: 1,500
at 25
C (77
F)
HINT:
As the temperature increases, the resistance decreases.
NGREPLACE COOLER THERMISTOR NO.1
OK
3CHECK HARNESS AND CONNECTOR(COOLER THERMISTOR NO.1 ± A/C AMPLIFIER)
(a)Check for an open or short circuit in harness and connector between term\
inal TE and SG±4 of A/C
amplifier (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK

05±1112
± DIAGNOSTICSAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
4 READ OUTPUT DTC
(a) Clear the DTCs.
(b) Read the DTC at least 8.5 minutes after turning the ignition switch ON.
Standard: Normal codes are output.
NG REPLACE AIR CONDITIONING AMPLIFIER
OK
SYSTEM OK

I35374
C10P±B
22 1
IC1
A1 A/C Ambient Temp. SensorA15 MPX±A/C Control Assembly Combination Meter
*1: 1CD±FTV
*2: 1AZ±FSE
*3: 1AZ±FE, 1ZZ±FE, 3ZZ±FEIC1 P±B P P10 20
11 I14
Integration Relay
C10P
E9A15 MPX+ 20
E1018 Engine and ECT ECU (A/T)Engine ECU (M/T)
(*2) (*1)E921
E1029
(*2) (*1) 14
10 13
P±B
C10W
IE14 12
W
21
C10W±R
IE115 11
W±R MPX2 MPX1
MPX2 MPX1 23
E9
(*3)29
E9
(*3) 05±1106
± DIAGNOSTICSAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTC 12 AMBIENT TEMPERATURE SENSOR CIRCUIT
CIRCUIT DESCRIPTION
This sensor detects the temperature outside the cabin and sends the appropriate signals to the A/C amplifier.
DTC No.Detection itemTrouble Area
12Open or short in ambient temperature sensor circuit

Thermistor assy (ambient temp. sensor)

Harness or connector between thermistor assy (ambient
temp. sensor) and combination meter

Combination meter

Harness or connector between combination meter and A/C
amplifier assy

A/C amplifier assy
WIRING DIAGRAM
05C7L±01

I37583
C10±12C10±11
I30156
Resistance (k)
Temperature (
C)
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1107
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 INSPECT COMBINATION METER ASSY
(a) Disconnect the connector from the combination meter
assy.
(b) Measure resistance between the terminal C10±11 and
C10±12 of the ambient temp. sensor connector at each
temperature.
Standard:
9.0 to 9.8 kat 0
C (0
F)
2.7 to 2.9 kat 25
C (77
F)
HINT:
As the temperature increases, resistance decreases.
OK REPLACE COMBINATION METER ASSY
NG

05±1108
± DIAGNOSTICSAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
2 CHECK HARNESS AND CONNECTOR(COMBINATION METER ± OUTER AMBIENT
TEMPERATURE SENSOR)
(a) Disconnect the connector from ambient temp. sensor.
(b) Check continuity between the terminal C10±11 (12) of combination meter assy and the terminal A1±1
(2) of ambient temp. sensor connector.
Standard: Continuity
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
3 READ OUTPUT DTC
(a) Clear the DTCs.
(b) Read the DTC at least 8.5 minutes after turning the ignition switch ON.
Standard: Normal codes are output.
NG REPLACE OUTER AMBIENT TEMPERATURE
SENSOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE

I35373
A/C Control Assembly
22
6 A16 TR
SG±5 GR
G
12 A17
A/C Room Temp. Sensor
A16 05±1102
± DIAGNOSTICSAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTC 11 ROOM TEMPERATURE SENSOR CIRCUIT
CIRCUIT DESCRIPTION
This sensor detects the temperature inside the cabin and sends the appreciate signals to the A/C amplifier.
DTC No.Detection itemTrouble Area
11Open or short in room temperature sensor circuit

Cooler thermistor (room temp. sensor)

Harness or connector between cooler thermistor (room temp.
sensor) and A/C amplifier assy

A/C amplifier assy
WIRING DIAGRAM
05A7M±02

I36144
TRSG±5
A16A15
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1103
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 INSPECT AIR CONDITIONING AMPLIFIER(TR ± SG±5)
(a) Remove the A/C amplifier with connectors being con-
nected.
(b) Turn the ignition switch to ON.
(c) Measure the voltage between terminal TR and SG±5 of
A/C amplifier connector at each temperature.
Standard:
1.8 to 2.2 V at 25
C (77
F)
1.2 to 1.6 V at 40
C (104
F)
HINT:
As the temperature increases, the voltage decreases.
OK PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN ON PROBLEM SYMPTOMS TABLE
NG

I30111
I30156
Resistance (k
)
Temperature (
C)
05±1104
± DIAGNOSTICSAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
2 INSPECT COOLER (ROOM TEMP. SENSOR) THERMISTOR
(a) Remove cooler the thermistor (room temp. sensor).
(b) Measure the resistance between terminal 1 and 2 of cool-
er thermistor (room temp. sensor) connector at each tem-
perature.
Standard:
1,615 to 1,785
at 25
C (77
F)
HINT:
As the temperature increases, the resistance decreases.
NG REPLACE COOLER (ROOM TEMP. SENSOR)
THERMISTOR
OK