TOYOTA AVENSIS 2005 Service Repair Manual

±
DIAGNOSTICS AIR CONDITIONING SYSTEM
05±1101
AVENSIS REPAIR MANUAL (RM1018E)
Engine idle up does not occur, or is continuous
1. Air conditioner magnetic valve circut
2. A/C amplifier assy
3. Engine ECU 1AZ±FSE:
1AZ±FE:
1ZZ±FE/3ZZ±FE:
1CD±FTV:05±1151
05±1098 05±294
05±149 05±5
05±528
Set temperature value displayed does not much up with operation
of temperature control switch.1. Air conditioner magnetic valve circut
2. A/C amplifier assy05±1151
05±1098
Brightness does not change when light control switch it turned.1. Illumination light system
2. A/C amplifier assy±
05±1098
Unable to access the diagnosis mode.1. A/C amplifier assy05±1098
DTC is not recorded. Set mode is cleared when IG switch is
turned off.1. Back±up power source circuit
2. A/C amplifier assy05±1142
05±1098
Hot gas heater:
SymptomSuspect AreaSee page
Warm wind does not blow out even if the gas heater switch is
turned on before the water temperature rises under the condition
where the ordinal A/C correctly operates.1. Hot gas heater magnetic valve circuit
2. Hot gas heater switch circuit
3. A/C amplifier assy05±1157
05±1159
05±1098

05C7K±01
I36145
A15A16
1211
2423 19 1615
20191817161514131211 8 7 6 5 4 3 2 1
10 9 8 7 6 5 4 3 2 1 10 9
2221 1817 141320 05±1098
± DIAGNOSTICSAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
TERMINALS OF ECU
1. AIR CONDITIONER AMPLIFIER ASSY
Terminal No. (Symbols)Wiring ColorConditionSpecification
A16±5 (BLW) ±
A16±13 (GND)R ± W±BIG SW: ON
Front blower: OperatePulse generation
A16±7 (PRE) ±
A16±18 (SG)L±W ± G±W
Start engine
Refrigerant pressure: 0 kPa (0 kgf/cm2, 0 psi)
3,138 MPa
(32.0 kgf/cm2, 455 psi)
0.5
4.8 V
A15±20 (MPX±) ±
A16±13 (GND)P ± W±BMultiplex communication circuit±
A15±10 (MPX+) ±
A16±13 (GND)P±B ± W±BMultiplex communication circuit±
A15±6 (FRS) ±
A16±13 (GND)P±B ± W±BIG SW: ON
R/F SW: RECIRCULATION
FRESH10 to 14
Below 1.0 V
A15±5 (REC) ±
A16±13 (GND)R±Y ± W±BIG SW: ON
R/F SW: FRESH
RECIRCULATION10 to 14
Below 1.0 V
A16±17 (HR) ±
A16±13 (GND)GR±R ± W±BIG SW: ON
Front blower: OFF
Operate10 to 14
Below 1.0 V
A15±4 (AOF) ±
A16±13(GND)L±B ± W±BIG SW: ON
Mode switch: DEF.
FACEBelow 1.0
10 to 14 V
A15±3 (AOD) ±
A16±13 (GND)LG±B ± W±BIG SW: ON
Mode switch: FACE
DEF.Below 1.0
10 to 14 V
A16±12 (IG) ±
A16±13 (GND)R±W ± W±BIG SW: LOCK
ONBelow 10 to 14 V
A15±2 (AMPH) ±
A16±13 (GND)W ± W±BIG SW: ON
Set passenger side temp.: MAX. COOL
MAX. HOTBelow 1.0
10 to 14 V
A15±1 (AMPC) ±
A16±13 (GND)Y ± W±BIG SW:
Set passenger side temp.: MAX HOT
MAX. COOLBelow 1.0
10 to 14 V
A15±12 (AMDH) ±
A16±13 (GND)P±L ± W±BIG SW:
Set driver side temp.: MAX. COOL
MAX. HOTBelow 1.0
10 to 14 V
A15±11 (AMDC) ±
A16±13 (GND)B ± W±BIG SW:
Set driver side temp.: MAX HOT
MAX. COOLBelow 1.0
10 to 14 V
A16±13 (GND) ±
Body groundW±B ± Body groundAlwaysContinuity
A16±24 (+B) ±
A16±13 (GND)W±R ± W±BAlways10 to 14 V
A16±8 (TPD) ±
A15±14 (SG±2)GR ± Y±RIG SW: ON
Set driver side temp.: MAX HOT
MAX. COOL1.0
4.0 V
A16±20 TPP ±
A15±13 (SG±1)V ± PIG SW: ON
Set passenger side temp.: MAX HOT
MAX. COOL1.0
4.0 V
A16±9 (TSD) ±
A16±13 (GND)LG ± W±BIG SW: ON
Solar sensor subject to electric light0.8 to 3.3 V
A16±21 (TSP) ±
A16±13 (GND)L ± W±BIG SW: ON
Solar sensor subject to electric light0.8 to 3.3 V

I35419
A10A9
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1099
AVENSIS REPAIR MANUAL (RM1018E)Terminal No. (Symbols)Specification Condition Wiring Color
A16±22 (TR) ±
A16±6 (SG±5)GR ± GIG SW: ON
Cabin temp.: 25
C (77
F)
40
C (104
F)1.8 to 2.2
1.2 to 1.6 V
A16±10 (TE) ±
A15±16 (SG±4)B ± W±GEvaporator temp.: 0
C (32
F)
15
C (59
F)2.0 to 2.4
1.4 to 1.8 V
A16±23 (ILL+) ±
A16±13 (GND)G ± W±BLight control switch TAIL or HEAD10 to 14 V
A16±19 (TPM) ±
A15±15 (SG±3)GR±R ± G±WIG SW: ON
Set air flow setting: DEF.
FACE1.0
4.0 V
A15±8 (SOL+) ±
A16±13 (GND)R ± W±BStart engine
Compressor: OperatePulse generation
A15±7 (MGV) ±
A16±13 (GND) (*1)R±Y ± W±BStart engine
Hot gas heater: Operate10 to 14
Below 1.0 V
A16±11 (HOTGASIN) ±
A16±13 (GND) (*1)G±Y ± W±BIG SW: ON
Hot Gas SW: ON10 to 14 V
A16±16 (S5) ±
A16±18 (SG)B±W ± G±WIG SW: LOCK
ON0
5.0 V
A16±1 (S5±1) ±
A15±13 (SG±1)R ± PIG SW: LOCK
ON0
5.0 V
A16±2 (S5±2) ±
A15±14 (SG±2)Y±B ± Y±RIG SW: LOCK
ON0
5.0 V
A16±14 (S5±3) ±
A15±15 (SG±3)BR±W ± G±WIG SW: LOCK
ON0
5.0 V
A16±15 (S5±4) ±
A16±9 (TSD)O ± LGIG SW: LOCK
ON1.7
4.2 V
A16±15 (S5±4) ±
A16±21 (TSP)O ± LIG SW: LOCK
ON1.7
4.2 V
A15±17 (CFAN) ±
A16±13 (GND)W±R ± W±BStart engine
Condenser fan: operate10 to 14
Below 1.0 V
A16±19 (PBKIG) ±
A17±13 (GND)B±W ± W±BIG SW: ON
PARKING BRAKE SW: OFF
ON10 to 14
Below 1.0 V
A17±3 (PBLT) ±
A17±13 (GND) (*3)L±R ± W±BIG SW: ON
SEAT BELT SIGNAL: OFF
ON10 to 14
Below 1.0 V
A17±4 (RDEFIN) ±
A17±13 (GND) (*2)G±W ± W±BIG SW: ON
RDEF RELAY : OFF
ONBelow 1.0
10 to 14 V
(*1) Diesel (standard) only
(*2) Petrol only
(*3) Except 1AZ±FE
2. COMBINATION METER
Terminal No. (Symbols)Wiring ColorConditionSpecification
C10±17 (Z1H) ±
Body groundW±B ± Body groundAlwaysContinuity
C10±11 (HAY) ±
C10±12 (HAZ)W±R ± WIG SW: ON
Ambient temp.: 25
C (77
F)
40
C (104
F)1.35 to 1.75

0.85 to 1.25 V

05C7J±01
I35352
w/ Pulley Compressor Assy

Air Conditioner Magnetic Valve
Pressure Sensor Magnetic Valve Assy
Heater Switch Cooler (Solar Sensor) Thermistor
Combination Meter Assy
Engine and ECT ECU (A/T)
Engine ECU (M/T)
Air Conditioner Control Assy
Cooler (Room Temp. Sensor) Thermistor
DLC3Driver
Side J/B
w/ Hot Gas Heater Models:
(Air Conditioning Amplifier)
Pressure
Sensor
Outer Ambient Temperature Sensor
w/ Receiver Condenser Assy
05±1096
± DIAGNOSTICSAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
LOCATION

I35353
Recirculation Damper Servo Sub±assy
Mode Damper Servo Sub±assy
Evaporator Temp. Sensor
Evaporator
Airmix Damper Servo Sub±assy
Airmix No.2 Damper
Servo Sub±assy
Blower Motor ControlBlower w/ Fan Motor
Sub±assy
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1097
AVENSIS REPAIR MANUAL (RM1018E)

I35410
BB WEngine Room R/B No.3Engine Room R/B No.1,
Engine Room J/B No.1Power Heater ECU
3 3 1A 1
12 PWR HTR
P15
+
FL MAIN
Battery
ECW±B W±BJ2
J/C
AAP11
± 1
± DIAGNOSTICSCOMBUSTION TYPE POWER HEATER SYSTEM
05±1171
AVENSIS REPAIR MANUAL (RM1018E)
ECU POWER SOURCE CIRCUIT
CIRCUIT DESCRIPTION
This is power source for the power heater ECU and power heater fuel pump.
WIRING DIAGRAM
05C80±01

I36137
+
P1
I37732
1 23 4
5 67 8
±P1
05±1172
±
DIAGNOSTICS COMBUSTION TYPE POWER HEATER SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
1CHECK FUSE(PWR HTR)
(a)Remove the PWR HTR from the engine room J/B or R/B No.1.
(b)Check that the continuity exists of PWR HTR fuse. NGREPAIR OR REPLACE FUSE
OK
2INSPECT POWER HEATER ECU(+)
(a)Remove the power heater ECU with connectors being connected.
(b)Turn the ignition switch to ON.
(c)Measure the voltage between terminal º+º of the power heater ECU and body ground.
Standard: 10 to 14 V
NGREPAIR OR REPLACE WIRE HARNESS
OK
3CHECK HARNESS AND CONNECTOR(POWER HEATER ECU ± BODY GROUND)
(a)Check for an open or short circuit in harness and connec- tor between the power heater ECU and body ground
(See page 01±32).
NG REPAIR OR REPLACE WIRE HARNESS
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

05C7Z±01
05±1170
±
DIAGNOSTICS COMBUSTION TYPE POWER HEATER SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
PROBLEM SYMPTOMS TABLE
If the normal code is displayed during DTC check although the problem still occurs, check the circuits for
each problem symptom in the order given in the table below, and proceed to the relevant troubleshooting.
SymptomSuspect AreaSee page
The combustion type power heater does not operate
1. ECU power source circuit
2. Power heater switch circuit
3. Power heater fuel pump circuit
4. Power heater alternator circuit05±1171
05±1173
05±1176
05±1179

05C7Y±01
I36138
P1
± DIAGNOSTICSCOMBUSTION TYPE POWER HEATER SYSTEM
05±1169
AVENSIS REPAIR MANUAL (RM1018E)
TERMINALS OF ECU
1. POWER HEATER ECU
Terminal No. (Symbols)Wiring ColorConditionSpecification
P1±1 (±) ± Body groundW±B ± Body groundAlwaysContinuity
P1±2 (F/P) ± Body groundL ± Body groundAlwaysContinuity
P1±3 (SW) ± Body groundG±Y ± Body groundIG SW: ON
Power heater SW: ON10 to 14
P1±5 (+) ± Body groundW ± Body groundAlwaysContinuity
P1±8 (ALT +L ) ± Body groundY ± Body groundAlternator: OperatePulse generation

05C7X±01
I36096
Heater Pump Assy Alternator Assy
Heater Assy
Center J/B
Heater Switch Assy
Driver Side J/B

HTR Fuse
05±1168
± DIAGNOSTICSCOMBUSTION TYPE POWER HEATER SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
LOCATION