TOYOTA LAND CRUISER 1998 Factory Repair Manual

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

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

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)

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.

I06682
I06683
AC-50
- AIR CONDITIONINGREAR HEATER UNIT
2775 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(c) Remove the nut and the fan.
(d) Remove the screws and the blower motor.

AC1KQ-05
I07898
1
2
- AIR CONDITIONINGREAR HEATER UNIT
AC-51
2776 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION
1. INSPECT HEATER RADIATOR
If the fins are clogged, clean them with compressed air.
2. INSPECT BLOWER MOTOR OPERATION
Connect battery positive (+) lead to terminal 1 and battery neg-
ative (-) lead to terminal 2, then check that the motor rotates
smoothly.
If operation is not as specified, replace the blower motor.
3. INSPECT AIR MIX SERVOMOTOR (See page DI-1354)
4. INSPECT AIR MIX DAMPER POSITION SENSOR
(See page DI-1345)

AC1KS-02
- AIR CONDITIONINGREAR HEATER UNIT
AC-53
2778 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSTALLATION
Installation is in the reverse of removal (See page AC-47).

AC1KR-02
AC-52
- AIR CONDITIONINGREAR HEATER UNIT
2777 Author
: Date
:
2004 LAND CRUISER (RM1071U)
REASSEMBLY
Reassembly is in the reverse of disassembly (See page AC-49).

AC1KO-04
I03973
I05080
Second Ridge
Hose Clip
Water Hose
I03924
- AIR CONDITIONINGREAR HEATER UNIT
AC-47
2772 Author
: Date
:
2004 LAND CRUISER (RM1071U)
REMOVAL
1. DRAIN ENGINE COOLANT FROM RADIATOR
HINT:
It is not necessary to drain out all the coolant.
2. DISCONNECT WATER HOSES FROM HEATER RA-
DIATOR PIPES
(a) Using pliers, grip the claws of the clip and slide the clip
along the hose
(b) Disconnect the water hoses
HINT:
At the time of installation, push the water hose on to the heater
radiator pipe to the second ridge on the pipe.
3. REMOVE FRONT SEATS
4. REMOVE REAR CONSOLE BOX
5. REMOVE FRONT CONSOLE BOX COVER
6. REMOVE LOWER CENTER CLUSTER FINISH PANEL
7. REMOVE FRONT DOOR SCUFF PLATE
8. REMOVE COWL SIDE TRIMS
9. REMOVE REAR DOOR SCUFF PLATES
10. REMOVE CENTER PILLAR GARNISHES
11. SLIDE FLOOR CARPET BACKWARD
12. REMOVE COOLER BRACKET
Remove the 4 bolts and the cooler bracket.

I03975
I03976
AC-48
- AIR CONDITIONINGREAR HEATER UNIT
2773 Author
: Date
:
2004 LAND CRUISER (RM1071U)
13. REMOVE REAR HEATER DUCT
Remove the bolt, the screw and the rear heater duct.
14. REMOVE REAR HEATER UNIT
(a) Disconnect the connector.
(b) Remove the 3 bolts and the rear heater unit.