TOYOTA AVENSIS 2002 Repair Manual

I30157
I30116
To ºDEFº
To ºFACEº 55±10
± HEATER & AIR CONDITIONERAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
5. INSPECT MODE DAMPER SERVO SUB±ASSY
(MANUAL AIR CONDITIONING)
(a) Inspect servomotor operation.
(1) Connect the positive (+) lead from the battery to ter-
minal 4 and negative (±) lead to terminal 5, then
check that the arm turns to ºDEFº side smoothly.
(2) Connect the positive (+) lead from the battery to ter-
minal 5 and negative (±) lead to terminal 4, then
check that the arm turns to ºFACEº side smoothly.
If operations are not as specified, replace the servomotor.




E50650
I30145
40
30
20
10
8
6
4
2
0
±30 ±20 ±10 0 10 20 30 50 60 70 8040 Resistance (k
)
Temperature (
C)
I30151
2
1
LHD
RHD
± HEATER & AIR CONDITIONERAIR CONDITIONING SYSTEM
55±11
AVENSIS REPAIR MANUAL (RM1018E)
6. INSPECT COOLER THERMISTOR NO.1 (MANUAL AIR
CONDITIONING)
(a) Check the resistance between terminal 1 and 2 of cooler
thermistor No. 1 at each temperature, as shown in the
graph.
Standard: 1,500
at 25
C (77
F)
HINT:
As the temperature increases, the resistance decreases.
If resistance value is not as specified, replace the sensor.
7. INSPECT BLOWER W/FAN MOTOR SUB±ASSY
(MANUAL AIR CONDITIONING)
(a) Connect the positive (+) lead from the battery to terminal
1 and negative (±) to terminal 2, then check that the motor
operation smoothly.
If operation is not as specified, replace the blower motor.

E32993
55±12
± HEATER & AIR CONDITIONERAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
8. INSPECT HEATER RELAY (MANUAL AIR
CONDITIONING)
Terminal No.Specified condition
No continuity
3±5Less than 1

(When battery voltage applied to terminals 1 and 2.)
Less than 1

3±4No continuity
(When battery voltage applied to terminals 1 and 2.)
1±2Constant continuity
If continuity is not as specified, replace the rear cooler relay.

550YQ±01
I35277
Blower Assy
Air Duct No.2
Recirculation Damper Servo Sub±assy
Air Filter
Air Filter Case
Blower w/ fan Motor Sub±assy
Manual A/C:
Blower Resistor Air Conditioning Wire No.1
Auto A/C:
Blower Motor Control
9.8 (100, 87 in.
lbf)
Cooler Wiring No.1Manual A/C:
N
m (kgf
cm, ft
lbf): Specified torque
55±64
± HEATER & AIR CONDITIONERBLOWER ASSY
AVENSIS REPAIR MANUAL (RM1018E)
BLOWER ASSY
COMPONENTS

550YR±01
I36810Clamp
I36811Clamp
I35314
I35315
±
HEATER & AIR CONDITIONER BLOWER ASSY
55±65
AVENSIS REPAIR MANUAL (RM1018E)
OVERHAUL
HINT:
COMPONENTS: See page 55±64
1.REMOVE INSTRUMENT PANEL LOWER ASSY (See page 71±11)
HINT:
Refer to the instructions for removal of the instrument panel lower assy\
.
2.REMOVE ECM (See page 10±65)
3.REMOVE AIR DUCT NO.2 (See page 55±55)
4. REMOVE BLOWER ASSY
(a) Disconnect the connector and the clamp.
(b) RHD Auto A/C:Disconnect the connector and the clamp.
(c) Disconnect the connectors.
(d) Remove the 2 nuts.
(e) Remove the 2 bolts and the 2 screws.
(f) Release the claw fitting and remove the blower assy.

I353162 Claws
I35318
I35319Clamp
I35320
55±66
± HEATER & AIR CONDITIONERBLOWER ASSY
AVENSIS REPAIR MANUAL (RM1018E)
5. REMOVE AIR FILTER CASE
(a) Release the 2 claw fittings and remove the air filter case.
6. REMOVE AIR FILTER
7. REMOVE RECIRCULATION DAMPER SERVO
SUB±ASSY
(a) Remove the 2 screws and the recirculation damper servo
sub±assy.
8. REMOVE AIR CONDITIONING WIRENO1 (MANUAL
AIR CONDITIONING)
(a) Disconnect the connector.
(b) Release the clump and remove the air conditioning wire
No.1.
9. REMOVE COOLER WIRING NO.1 (AUTO AIR CONDITIONING)
HINT:
Disconnection of the cooler wiring No.1 is the same as the air conditioning wire No.1.
10. REMOVE BLOWER RESISTOR (MANUAL AIR
CONDITIONING)
(a) Remove the 2 screws and the blower resistor.

I35321
I35322
I35317
I36813
I35314
± HEATER & AIR CONDITIONERBLOWER ASSY
55±67
AVENSIS REPAIR MANUAL (RM1018E)
11. REMOVE BLOWER MOTOR CONTROL (AUTO AIR
CONDITIONING)
(a) Remove the 2 screws and the blower motor control.
12. REMOVE BLOWER W/FAN MOTOR SUB±ASSY
(a) Remove the 3 screws and the blower w/ fun motor sub±
assy.
13. INSTALL AIR FILTER
(a) Install the air filter as shown in the illustration.
14. INSTALL BLOWER ASSY
(a) Install the blower assy with the claw fitting.
(b) Install the blower assy with the 2 bolts and the 2 screws.
Torque: 9.8 N
m (100 kgf
cm, 87 in.
lbf) (Bolt)
(c) Install the 2 nuts.
(d) Connect the connectors.

I36811Clamp
I36810Clamp 55±68
± HEATER & AIR CONDITIONERBLOWER ASSY
AVENSIS REPAIR MANUAL (RM1018E)
(e) RHD Auto A/C:
Connect the connector and the clamp.
(f) Connect the connector and the clamp.

550ZG±01



I12508
Connector B
DTC Check Harness
Current DisplayControl PanelPast Record DTC Display
Memory Clear Button
DTC Calling Button
DTC Calling ButtonºHeatingº
Symbol In Normal
In Malfunction Connector A
± HEATER & AIR CONDITIONERCOMBUSTION TYPE POWER HEATER SYSTEM
55±15
AVENSIS REPAIR MANUAL (RM1018E)
COMBUSTION TYPE POWER HEATER SYSTEM
ON±VEHICLE INSPECTION
NOTICE:

If the glow plug breaks, the ECU detects the breakage and stops the automatic operation, so
the burner heater does not activate. (For other failures, similarly activated.)

The cause of failures (such as voltage malfunction, overheating malfunction, short±circuit or
breakage of functional components, etc.) and repair methods are shown by connecting the DTC
tester and reading the DTC.
1. DIAGNOSTICS FUNCTION
(a) Connect the DTC tester between the connector A (Vehicle harness) of DTC check harness and con-
nector B (Power heater harness).
(b) Start the engine.
(c) Pressing the DTC calling button displays a 3±digit number DTC.

I35431
Burner Motor
Glow Plug
Surface Sensor
Temp. Control Sensor
Flame Sensor13
Power
Heater
ECU
Connector BTerminal L
of AlternatorBattery
Metering Pump
Fuse (20 A)
Vehicle Side SW 14
9
12
5
6
3
4
1
2R
BR
B±R
G
L±Y
L
Y
L±W5
1
6
2
7
3
8
4W±B
R±G
R±B Connector A
IG
W±R (*1)
Y±R (*2)
R±L (*1)
R±Y (*2)
*1: TMC Made
*2: TMUK Made 55±16
± HEATER & AIR CONDITIONERCOMBUSTION TYPE POWER HEATER SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
2. DESCRIPTION OF DISPLAY AND BUTTONS
(a) AF: Current Value Malfunction (Blinking at current failure)
Diag: DTC (Example: 064 Flame sensor break)
Memory Clear button: Deletion of faulty memory (Press both buttons together for longer than 2 se-
conds)
> Button: Scroll up of faulty memory (The past 5 codes can be stored.)
< Button: Scroll down of faulty memory (The past 5 codes can be stored.)
3. FAULTY MEMORY
(a) The ECU is able to store up to 5 pieces of faulty memory. If it is full, the new data is written over F5.
4. WIRING DIAGRAM