2005 TOYOTA AVENSIS heater

I36091
From Back Side:
Connector ºBº Connector ºAº 55±4
± HEATER & AIR CONDITIONERAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
(b) Connect the connector to air conditioning control assy and inspect wire harness side connector from
the back side, as shown in the table.
Symbols
(Terminal No.)ConditionSpecified condition
HI (A4)± GND (A1)Ignition switch ON
Turn blower dial: OFF  HINo continuity  Continuity
M2 (A5) ± GND (A1)Ignition switch: ON
Turn blower dial: OFF  M2No continuity  Continuity
M1 (A6) ± GND (A1)Ignition switch: ON
Turn blower dial: OFF  M1No continuity  Continuity
GND (A1) ± Body groundIgnition switch: ON
Turn blower dial: OFF  LONo continuity  Continuity
RDEFIN (B4) ±
GND (B40) (*1)
Ignition switch : ON
Rear DEF switch: ON10 to 14 V
S5±2 (B5) ± GND (B40)Ignition switch: ON5.0 V
S5±3 (B6) ± GND (B40)Ignition switch: ON5.0 V
S5 (B7) ± GND (B40)Ignition switch: ON5.0 V
MPX+ (B9) ± GND (B40)Communication circuit±
FRS (B10) ± GND (B40)Ignition switch: ON
R/F switch: RECIRCURATION  FRESH10 to 14  0 V
REC (B11) ± GND (B40)Ignition switch: ON
R/F switch: FRESH  RECIRCURATION10 to 14  0 V
AOD (B12) ± GND (B40)Ignition switch: ON
Mode control dial: DEF10 to 14 V
AOF (B13) ± GND (B40)Ignition switch: ON
Mode control dial: FACE10 to 14 V
MGV (B14) ±
GND (B40) (*2)
Start engine
Hot gas heater: Operate10 to 14  0 V
AMH (B15) ± GND (B40)Ignition switch: ON
Temperature control dial: MAX HOT10 to 14 V
AMC (B16) ± GND (B40)Ignition switch: ON
Temperature control dial: MAX COOL10 to 14 V
SOL+ (B17) ± GND (B40)Start engine
Compressor: OperatePulse generation
ILL+ (B21) ±
GND (B40)
Ignition switch: ON
Turn light control switch: OFF  ON0  10 to 14 V
HOTGASIN (B22) ±
GND (B40) (*2)
Ignition switch: ON
Heater switch: ON10 to 14 V
CFAN (B23) ± GND (B40)Start engine
Condenser fan: operate10 to 14  0 V
RPTC1 (B28) ± GND (B40)PTC heater: OperateAbove 7.5 V
MPX± (B29) ± GND (B40)Communication circuit±
TE (B31) ± GND (B40)Evaporator temperature: 0
C (32
F) 15
C (59
F)2.0 to 2.4  1.4 to 1.8 V

± HEATER & AIR CONDITIONERAIR CONDITIONING SYSTEM
55±5
AVENSIS REPAIR MANUAL (RM1018E)Symbols
(Terminal No.)Specified condition Condition
PRE (B32) ± GND (B40)Start engine
Refrigerant pressure: 0 Pa (0 kgf/cm2, 0 psi)
3,138 MPa (32.0 kgf/cm2, 455 psi)0.5 to 4.8 V
TPM (B33) ± GND (B40)Ignition switch: ON
Mode control dial: DEF
FACE1
4 V
TP (B34) ± GND (B40)Ignition switch: ON
Temperature control dial: MAX HOT
MAX COOL1
4 V
HRIN (B35) ± GND (B40)Ignition switch: ON
Front blower: OperateBelow 1.0 V
SG±2 (B36) ± Body groundAlwaysContinuity
SG±3 (B37) ± Body groundAlwaysContinuity
SG (B38) ± Body groundAlwaysContinuity
SG±4 (B39) ± Body groundAlwaysContinuity
GND (B40) ± Body groundAlwaysContinuity
PBLT (B24) ± GND (B40)Ignition switch: ON
Seat belt signal: OFF
ON10 to 14
Below 1.0 V
PBKIG (B25) ± GND (B40)Ignition switch: ON
Parking brake switch: OFF
ON10 to 14
Below 1.0 V
ALT (B26) ± GND (B40)Start enginePulse generation
(*1) Petrol only
(*2) Diesel (standard) only
If circuit is not as specified, try replacing the air conditioning control assy with a new one. If circuit is not as
specified, inspect the circuits connected to other parts.

5507E±03
AC2810
AC2811
N11084
Wrong Okay
HI
LO HI LO
± HEATER & AIR CONDITIONERAIR CONDITIONING SYSTEM
55±1
AVENSIS REPAIR MANUAL (RM1018E)
AIR CONDITIONING SYSTEM
PRECAUTION
1. DO NOT HANDLE REFRIGERANT IN AN ENCLOSED
AREA OR NEAR AN OPEN FLAME
2. ALWAYS WEAR EYE PROTECTION
3. BE CAREFUL NOT TO GET LIQUID REFRIGERANT IN
YOUR EYES OR ON YOUR SKIN
If liquid refrigerant gets in your eyes or on your skin.
(a) Wash the area with lots of cold water.
CAUTION:
Do not rub your eyes or skin.
(b) Apply clean petroleum jelly to the skin.
(c) Go immediately to a hospital or see a physician for profes-
sional treatment.
4. NEVER HEAT CONTAINER OR EXPOSE IT TO NAKED
FLAME
5. BE CAREFUL NOT TO DROP CONTAINER AND NOT
TO APPLY PHYSICAL SHOCKS TO IT
6. DO NOT OPERATE COMPRESSOR WITHOUT
ENOUGH REFRIGERANT IN REFRIGERANT SYSTEM
If there is not enough refrigerant in the refrigerant system, oil lu-
brication will be insufficient and compressor may burnout may
occur, so take care to avoid this, necessary care should be tak-
en.
7. DO NOT OPEN HIGH PRESSURE MANIFOLD VALVE
WHILE COMPRESSOR IS OPERATING
Open and close the only low pressure valve. If the high pressure
valves are opened, refrigerant flows in the reverse direction and
cause the charging cylinder to rupture.
8. BE CAREFUL NOT TO OVERCHARGE SYSTEM WITH
REFRIGERANT
If refrigerant is overcharged, it causes problems such as insuffi-
cient cooling, poor fuel economy, engine overheating, etc.

55±2
± HEATER & AIR CONDITIONERAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
9. DO NOT OPERATE ENGINE AND COMPRESSOR
WITH NO REFRIGERANT IS FILLED
CAUTION:
This may damage the inside of the compressor because
the compressor parts always moves regardless of whether
the A/C system is turned on or off.

550YV±01
I35275
N
m (kgf
cm, ft
lbf) : Specified torque
9.8 (100, 87 in.
lbf)
9.8 (100, 87 in.
lbf)
Defroster Nozzle Assy
Heater To Register Duct No.1
Blower Assy
Air Conditioning Radiator Assy
Instrument Panel Brace Sub±assy No.1
Air Duct Rear No.3Air Duct Rear No.4
9.8 (100, 87 in.
lbf)
± HEATER & AIR CONDITIONERAIR CONDITIONING RADIATOR ASSY
55±53
AVENSIS REPAIR MANUAL (RM1018E)
AIR CONDITIONING RADIATOR ASSY
COMPONENTS

I35276
N
m (kgf
cm, ft
lbf) : Specified torque
Non±reusable part

Compressor oil ND±OIL 8 or equivalentCooler Thermistor No.1
Auto A/C:
Airmix No.2 Damper
Servo Sub±assy
Heater Piping CoverMode Damper Servo
Sub±assy
Airmix Damper Servo Sub±assy
w/o Hot gas heater:
Cooler Expansion Valve
Cooler Evaporator
Sub±assy No.1
Cooler Unit Drain Hose No.1
Air Conditioning
Tube Assy
Heater Radiator Unit Sub±assyAir Duct No.1Air Duct No.2
w/o Hot gas heater:
Air Conditioning
Tube Assy
w/ Hot gas heater:
O±ring


O±ring


3.5 (35, 30 in.
lbf)
Cooler Air Hose
RHD Auto A/C:
Air Conditioning
Wire No.1
55±54
± HEATER & AIR CONDITIONERAIR CONDITIONING RADIATOR ASSY
AVENSIS REPAIR MANUAL (RM1018E)

550YU±01
I37428
I352826 Claws
I352864 Claws
55±50
±
HEATER & AIR CONDITIONER AIR CONDITIONING CONTROL ASSY
AVENSIS REPAIR MANUAL (RM1018E)
OVERHAUL
HINT:
COMPONENTS: See page 55±48
1.REMOVE INSTRUMENT CLUSTER FINISH PANEL GARNISH NO.2 (See page 71±11)
2.REMOVE INSTRUMENT PANEL REGISTER ASSY CTR (See page 71±11)
3.REMOVE CONSOLE PANEL SUB±ASSY UPPER (See page 71±11)
4.REMOVE RADIO RECEIVER ASSEMBLY W/BRACKET (See page 67±5)
5.REMOVE RADIO BRACKET NO.1 (See page 67±5)
6.REMOVE RADIO BRACKET NO.2 (See page 67±5) 7. REMOVE AIR CONDITIONING CONTROL ASSY
(a) Remove the air conditioning control assy as shown in theillustration.
8. REMOVE AIR CONDITIONING PANEL SUB±ASSY
(a) Remove the 4 screws.
(b) Manual A/C: Release the 6 claw fittings and disconnect the air condi-
tioning panel sub±assy.
(c) Auto A/C: Release the 4 claw fittings and disconnect the air condi-
tioning panel sub±assy.

I35287
Auto A/C:
I35283
Manual A/C:
I35284
I35285
± HEATER & AIR CONDITIONERAIR CONDITIONING CONTROL ASSY
55±51
AVENSIS REPAIR MANUAL (RM1018E)
(d) Disconnect the cooler wire No.1 as shown in the illustra-
tion.
9. REMOVE HEATER CONTROL KNOB NO.3 (MANUAL AIR CONDITIONING)
10. REMOVE CONTROL KNOB SUB±ASSY (AUTO AIR CONDITIONING)
11. REMOVE HEATER CONTROL KNOB (MANUAL AIR CONDITIONING)
12. REMOVE HEATER CONTROL KNOB NO.2 (MANUAL AIR CONDITIONING)
13. REMOVE HEATER CONTROL HOUSING (MANUAL
AIR CONDITIONING)
(a) Release the 4 claw fittings and remove the 4 screws and
the heater control housing.
14. REMOVE HEATER CONTROL LENS ASSY (MANUAL AIR CONDITIONING)
15. REMOVE HEATER CONTROL LENS ASSY (MANUAL AIR CONDITIONING)
16. REMOVE HEATER CONTROL LENS ASSY (MANUAL AIR CONDITIONING)
17. REMOVE AIR CONDITIONING CONTROL BULB
(MANUAL AIR CONDITIONING)
(a) Remove the 4 air conditioning control bulbs.