heater TOYOTA LAND CRUISER 1998 Factory User Guide
[x] Cancel search | Manufacturer: TOYOTA, Model Year: 1998, Model line: LAND CRUISER, Model: TOYOTA LAND CRUISER 1998Pages: 3115, PDF Size: 54.88 MB
Page 73 of 3115
AC1KL-02
- AIR CONDITIONINGFRONT HEATER UNIT
AC-43
2768 Author: Date:
2004 LAND CRUISER (RM1071U)
REASSEMBLY
Reassembly is in the reverse of disassembly (See page AC-41).
Page 74 of 3115
AC1KI-04
I06727
I25894
Second Ridge
View A
UpperHose Clip
Lower
MarkingRHLH Upper
LowerMarking
View A
I06728
I06729
AC-40
- AIR CONDITIONINGFRONT HEATER UNIT
2765 Author: Date:
2004 LAND CRUISER (RM1071U)
REMOVAL
1. DRAIN ENGINE COOLANT FROM RADIATOR
HINT:
It is not necessary to drain out all coolant.
2. DISCONNECT WATER HOSES FROM HEATER RA-
DIATOR PIPES
(a) Using pliers, grip the claws of the hose clip and slide the
clip along the hose.
(b) Disconnect the water hoses from the heater radiator
pipes.
HINT:
At the time of installation , please refer to the following items.
Push the water hose onto the heater radiator pipe to the
second ridge on the pipe.
Install a hose clip in the position as shown in the illustra-
tion.
3. REMOVE INSTRUMENT PANEL AND REINFORCE-
MENT (See page BO-84)
4. REMOVE FRONT COOLING UNIT (See page AC-24)
5. REMOVE HEATER UNIT
(a) Remove the lower defroster nozzle.
(b) Disconnect the connector.
(c) Remove the 4 nuts and heater unit.
Page 75 of 3115
I25155
AC3OX-01
N02832
3
2 1
5 4
1
43
25
AC-94
- AIR CONDITIONINGHEATER MAIN RELAY
2819 Author: Date:
2004 LAND CRUISER (RM1071U)
HEATER MAIN RELAY
INSPECTION
1. REMOVE HEATER MAIN RELAY
Remove the heater main relay.
2. INSPECT HEATER MAIN RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant1 - 2
3 - 4Continuity
Apply B+ between
terminals 1 and 2.3 - 5Continuity
If continuity is not as specified, replace the relay.
3. INSTALL HEATER MAIN RELAY
Page 81 of 3115
AC1LJ-04
I06818
- AIR CONDITIONINGPOWER TRANSISTOR (for Rear Heater)
AC-83
2808 Author: Date:
2004 LAND CRUISER (RM1071U)
POWER TRANSISTOR (for Rear
Heater)
INSPECTION
1. REMOVE FRONT SEATS
2. REMOVE REAR CONSOLE BOX
3. REMOVE FRONT CONSOLE BOX COVER
4. REMOVE LOWER CENTER CLUSTER FINISH PANEL
5. REMOVE FRONT DOOR SCUFF PLATES
6. REMOVE COWL SIDE TRIMS
7. REMOVE REAR DOOR SCUFF PATES
8. REMOVE CENTER PILLAR GARNISHES
9. REMOVE POWER TRANSISTOR
(a) Slide the floor carpet backward.
(b) Disconnect the connector.
(c) Remove the 2 screws and power transistor.
10. INSPECT POWER TRANSISTOR
Check the power transistor in the same way as for ºPOWER
TRANSISTOR (For Rear Cooler)º on page AC-82.
11. INSTALL POWER TRANSISTOR
12. INSTALL CENTER PILLAR GARNISHES
13. INSTALL REAR DOOR SCUFF PATES
14. INSTALL COWL SIDE TRIMS
15. INSTALL FRONT DOOR SCUFF PLATES
16. INSTALL LOWER CENTER CLUSTER FINISH PANEL
17. INSTALL FRONT CONSOLE BOX COVER
18. INSTALL REAR CONSOLE BOX
19. INSTALL FRONT SEATS
Page 86 of 3115
I06720
AC1MC-04
I06715
2
21
I06716
1 3
4
5 8
6 7 9
I06717
1
3 4 5 8
6 7 92
AC-108
- AIR CONDITIONINGREAR A/C CONTROL ASSEMBLY
2833 Author: Date:
2004 LAND CRUISER (RM1071U)
REAR A/C CONTROL ASSEMBLY
INSPECTION
1. REMOVE REAR HEATER CONTROL ASSEMBLY
Using a screwdriver, release the 4 claws and pull out the rear
heater control assembly, then disconnect the connector.
2. INSPECT ILLUMINATION OPERATION
Connect battery positive (+) lead to terminal 2 and battery nega-
tive (-) lead to terminal 21 then check that the indicators come
on.
If operation is not as specified, replace the rear A/C control as-
sembly.
3. INSPECT INDICATOR OPERATION
(a) Connect battery positive (+) lead to terminal 1 and battery
negative (-) lead to all the other terminals, then check that
the indicator come on, as shown in the chart.
SwitchTester connection
Auto3
LO4
ME5
HI6
FACE7
Bi-Level8
FOOT9
If operation is not as specified, replace the rear A/C control as-
sembly.
(b) Connect the positive (+) lead from the battery to terminal
2, then check where the indicators dim.
If operation is not as specified, replace the rear A/C control as-
sembly.
Page 87 of 3115
I06718
16 17
18
19
20 2213
14
15
I06719
To ºWARMº
12
11
W
- AIR CONDITIONINGREAR A/C CONTROL ASSEMBLY
AC-109
2834 Author: Date:
2004 LAND CRUISER (RM1071U)
4. INSPECT SWITCH CONTINUITY
Check the continuity between terminals while switch is pressed,
as shown in the chart.
SwitchTester connectionSpecified condition
Auto13 - 22Continuity
OFF14 - 22Continuity
LO15 - 22Continuity
ME16 - 22Continuity
HI17 - 22Continuity
FACE18 - 22Continuity
Bi-Level19 - 22Continuity
FOOT20 - 22Continuity
If continuity is not as specified, replace the rear A/C control as-
sembly.
5. INSPECT VARIABLE RESISTOR OPERATION
(a) Measure resistance between terminal 10 and 12.
Standard resistance: 3.0 kW
(b) Gradually move the temperature control lever from
ºCOOLº side to ºWARMº side, then check that the resis-
tance between terminal 11 and 12 increase to 3.0 kW.
If operation is not as specified, replace the rear A/C control as-
sembly.
6. INSTALL HEATER CONTROL ASSEMBLY
Page 101 of 3115
I25040
Relay BlockJunction Block
(Built-in Relay)
AC3OY-01
I25183
Engine Room J/B
31 29 3 2
- AIR CONDITIONINGREAR HEATER RELAY
AC-95
2820 Author: Date:
2004 LAND CRUISER (RM1071U)
REAR HEATER RELAY
INSPECTION
HINT:
The rear heater relay is built in the engine room junction block.
Since the relay is constructed with a relay block that is in the
junction block as a unit, it is impossible to disconnect the wire
harness connecting with the relay block.
If the relay has a malfunction, replace it with the junction block
assembly wire harness together.
1. REMOVE ENGINE ROOM J/B
2. INSPECT REAR HEATER RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant29 - 31Continuity
Apply B+ between
terminals 29 and 31.2 - 3Continuity
If continuity is not as specified, replace the engine room J/B.
3. INSTALL ENGINE ROOM J/B
Page 102 of 3115
AC1KN-05
I15824
Cowl Side Trim
Front Door Scuff PlateCenter Pillar Garnish
Rear Door Scuff plate
Console Upper Panel
Lower Center Cluster
Finish Panel
Audio Amplifier
Front Console Box Rear Heater Unit
Rear Console
End Panel
Cooler Bracket Rear Heater Duct
Rear Console Box
- AIR CONDITIONINGREAR HEATER UNIT
AC-45
2770 Author: Date:
2004 LAND CRUISER (RM1071U)
REAR HEATER UNIT
COMPONENTS
Page 103 of 3115
I08487
Power Transistor
Air Inlet Temperature
Sensor
Cover
Fan
Heater Case
Blower Motor Heater Case Heater Radiator O-Ring
Heater Radiator Pipe
Air Mix Servomotor
Non - reusable part
AC-46
- AIR CONDITIONINGREAR HEATER UNIT
2771 Author: Date:
2004 LAND CRUISER (RM1071U)
Page 104 of 3115
AC1KP-03
I06819
I06821
I06681
I06818
I07896
- AIR CONDITIONINGREAR HEATER UNIT
AC-49
2774 Author: Date:
2004 LAND CRUISER (RM1071U)
DISASSEMBLY
1. REMOVE AIR MIX SERVOMOTOR
Remove the 3 screws and the air mix servomotor.
2. REMOVE HEATER RADIATOR
(a) Remove the 3 screws and 2 clamps
(b) Pull out the heater radiator.
(c) Remove the 2 screws, 2 clamps and the heater radiator
pipes.
(d) Remove the 2 O-rings.
HINT:
At the time of reassembly, do not reuse the O-rings
3. REMOVE POWER TRANSISTOR
Remove the 2 screws and the power transistor.
4. REMOVE BLOWER MOTOR
(a) Remove the 3 screws and the cover.
(b) Remove the 4 screws, the 3 holding springs and separate
the heater cases.