1999 TOYOTA AVENSIS heater

I12451
I12741
– AIR CONDITIONINGCOMBUSTION TYPE POWER HEATER
AC–17
6. REMOVE COMBUSTION CHAMBER WITH FLAME
TUBE
Remove the combustion chamber and gasket.
7. REMOVE HEAT EXCHAMBER

AC29Z–01


 I12509 35
30
25
20
15
5 10
0
0
20
406080 100 120
Temp. (C)
Resistance (kΩ)
Ohmmeter Water Temperature
Sensor
6 13




I12510 35
30
25
20
15
5 10
0
0
20
406080 100 120
Te m p . (C)
Resistance (kΩ)
Overheat Sensor
Ohmmeter
5
12
I12755
Ohmmeter 93
AC–18
– AIR CONDITIONINGCOMBUSTION TYPE POWER HEATER
INSPECTION
1. INSPECT WATER TEMPERATURE SENSOR
Measure the resistance between the terminals 6, 13.
Using an ohmmeter, measure the resistance between the ter-
minals.
Resistance: Refer to the graph
If the resistance is not as speaified, replace the water tempera-
ture sensor.
2. INSPECT OVERHEAT SENSOR
Measur the resistance between the terminal 5, 12.
Using an ohmmeter, measure the resistance between the ter-
minals.
Resistance: Refer to the graph
If the resistance is not as speaified, replace the over heat sen-
sor.
3. INSPECT GLOW PLUG
Using an ohmmeter, check that there is continuity, between the
glow plug terminal 3, 9.
Standard resistance: about 0.5ΩC  



If resistance is over 1Ω, replace the glow plug.


I12497
–50
Resistance kΩ
0 50 150100 450 500 550 2
1.75 2.25
0.5 0.751 1.251.5
350 300 250 200 400 2.5 2.753
7 14
Ohmmeter
– AIR CONDITIONINGCOMBUSTION TYPE POWER HEATER
AC–19
4. INSPECT FLAME SENSOR
Measur the resistance between the terminal 7, 14.

AC2A0–01
I12452
I12451
I12449
New Gasket
I12447
Control Unit
Cover
I12446
AC–20
– AIR CONDITIONINGCOMBUSTION TYPE POWER HEATER
REASSEMBLY
1. INSTALL HEAT EXCHAMBER
Align slot on heat exchanger (arrow) with lug in jacket.
2. INSTALL COMBUSTION CHAMBER WITH FLAME
TUBE
Install a new gasket and the combustion chamber.
3. INSTALL ELECTRIC MOTOR
(a) Install a new gasket.
(b) Install the electric motor with the 3 screws.
4. INSTALL CABLE HARNESS
(a) Install the water temperature sensor and over heat sen-
sor.
(b) Install the plate with the screw.
5. INSTALL COVER AND CONTROL UNIT
(a) Install the cover and control unit.
(b) Install the 2 hexagon screws.
(c) Install the 2 screws.
6. INSTALL BLOWER COVER
Install the blower cover with the 4 screws.

I12445
– AIR CONDITIONINGCOMBUSTION TYPE POWER HEATER
AC–21
7. INSTALL JACKET COVER
Install the jacket cover with the 4 screws.

AC2A1–01
I12476
I12475
I12474
AC–22
– AIR CONDITIONINGCOMBUSTION TYPE POWER HEATER
INSTALLATION
1. INSTALL COMBUSTION TYPE POWER HEATER
Install the combustion type power heater with the 2 bolts.
2. CONNECT COMBUSTION TYPE POWER HEATER
CONNECTOR
3. CONNECT FUEL PUMP CONNECTOR
4. CONNECT FUEL LINE
Connect the fuel line to the fuel pump.
5. CONNECT HEATER HOSES
(a) Connect the inlet heater hose.
(b) Connect the outlet heater hose.
6. FILL ENGINE COOLANT
7. INSTALL RH UNDER COVER

AC29T–01
I12440
Glow Plug
Engine Block
Heater Bracket
Cap
– AIR CONDITIONINGELECTRICAL TYPE POWER HEATER
AC–23
ELECTRICAL TYPE POWER HEATER
COMPONENTS

AC29U–01
I12479
I12489
Ohmmeter AC–24
– AIR CONDITIONINGELECTRICAL TYPE POWER HEATER
INSPECTION
1. DRAIN ENGINE COOLANT
2. REMOVE AIR CLEANER ASSEMBLY
3. REMOVE GLOW PLUGS
(a) Remove the glow plug cap.
(b) Remove the 3 bolts.
(c) Remove the glow plug plate.
(d) Remove the glow plug stay.
(e) Remove the 3 glow plugs.
4. INSPECT GLOW PLUGS
Using an ohmmeter, check that there is continuity between the
glow plug terminal and ground.
Standard resistance at 20C (68F):
Approx. 0.22 Ω
If there is continuity, replace the glow plug.
Torque: 13 N·m (130 kgf·cm, 9 ft·lbf)
5. REINSTALL GLOW PLUGS
(a) Install the 3 glow plugs.
(b) Install the glow plug stay.
(c) Install the glow plug plate.
(d) Install the 3 bolts.
(e) Install the glow plug cap.
6. REINSTALL AIR CLEANER ASSEMBLY
7. FILL ENGINE COOLANT