Page 2889 of 3115
SA166-05
F05440
Differential Lock Control Switch
Combination Meter
Rear Diff. Lock Control ECU
Rear Differential Lock Position Switch
L Position Switch
Rear Differential Lock Actuator
- SUSPENSION AND AXLEDIFFERENTIAL LOCKING SYSTEM
SA-167
2117 Author: Date:
2004 LAND CRUISER (RM1071U)
LOCATION
Page 2890 of 3115

F05176
SA165-06
Z16659
M1 M2
- SUSPENSION AND AXLEDIFFERENTIAL LOCKING SYSTEM
SA-163
2113 Author: Date:
2004 LAND CRUISER (RM1071U)
DIFFERENTIAL LOCKING SYSTEM
ON-VEHICLE INSPECTION
1. INSPECT DIFFERENTIAL LOCK SYSTEM
(a) Inspect the indicator light.
Check that the indicator light lights up for approx. 1 se-
cond when the ignition switch is turned ON.
(b) Inspect the differential lock operation.
(1) Jack up the vehicle then start the engine.
(2) Shift the transfer shift lever to L position.
(3) When the diff. lock control switch is set to the RR
position, the indicator light is turned on.
Differential lock is applied to the rear wheel at this
time.
HINT:
If the gears of the differential lock system are not meshed, the
indicator light remains blinking, so rotate the tires to mesh the
gear.
(4) When the diff. lock control switch is at the OFF posi-
tion, the indicator light goes off.
Differential lock is released for the rear wheel at this
time.
(5) Check the voltage between the terminals of the rear
diff. lock control ECU when switching the diff. lock
control switch with the speedometer, registering
approx. 8 km/h (5 mph) or more.
Swith positionTerminalSpecified value
ONM1 - M20.5 V or less
(No change)
(6) Return the diff. lock control switch to OFF.
(7) Stop the engine and lower the vehicle.
2. INSPECT DIFF. LOCK SYSTEM CIRCUIT
(a) Inspect the battery positive voltage.
Battery positive voltage: 10 - 14 V
Page 2891 of 3115

Z16462
RLP RM1 M2
4WD GND SPD IG Wire harness:
Z16461
GND
4WDRLP M1M2 ECU: SA-164
- SUSPENSION AND AXLEDIFFERENTIAL LOCKING SYSTEM
2114 Author: Date:
2004 LAND CRUISER (RM1071U)
(b) Inspect the system circuit with the connector discon-
nected.
Disconnect the connector from the rear diff. lock control
ECU and inspect the connector on the wire harness side,
as shown in the table.
Symbols (Terminals No.)Trouble partConditionSpecified value
M1 - M2RR Diff. Lock Actuator-Less than 100 W
GND - Body groundBody ground-Continuity
SPD - Body groundSpeed sensorVehicle moves slowly1 pulse each
40 cm (15.75 in.)
IG - Body groundDIFF FuseIgnition switch ON10 - 14 V
RLP B d dRear Diff. Lock Indica-Ignition switch ON with indicator light ONAbout 0 VRLP - Body groundRear Diff. Lock Indica
tor SwitchIgnition switch ON with indicator light OFF10 - 14 V
4WD B d dL iti S it hIgnition switch ON with T/F shift lever except LAbout 0 V4WD - Body groundL position SwitchIgnition switch ON with T/F shift lever L10 - 14 V
RBd dDifferential Lock Con-Ignition switch ON with differential lock control switch RR10 - 14 VR - Body groundDifferential Lock Con
trol SwitchIgnition switch ON with differential lock control switch OFFAbout 0 V
HINT:
If the circuit is not as specified value, check and repair or re-
place the trouble part shown in the table above.
(c) Inspect the system circuit with the connector connected.
(1) Turn the ignition switch to the ON position.
(2) Shift the transfer shift lever to L position.
(3) Using a voltmeter, measure the voltage when the
differential lock control switch is in the position, as
shown in the table.
Tester Connection
- Switch positionSpecified valve
4WD - GND-10 - 14 V
RLP - GNDRR*0.5 V or less
M1 - M2OFF " RR0.5 V or less " 10 - 14 V
(A 1 )05VM2 - M1RR " OFF(Approx. 1 sec.) "0.5 V
or less
*: The rear differential should be locked mechanically.
If the circuit is not as specified value, replace the ECU.
(4) Install the ECU in place.
Page 2892 of 3115

W02075
1 2
3
4 5Relay Housing
Metallic Parts Heater main relay:
Z07257
Free " Lock Lock " Free
Heater Main
Relay
Battery BatteryHeater Main
Relay
12
3 4
5
12
3 4
5
5 2 3
4 62 3
4
F05957
1
4 (+)
(-)
F05962
- SUSPENSION AND AXLEDIFFERENTIAL LOCKING SYSTEM
SA-165
2115 Author: Date:
2004 LAND CRUISER (RM1071U)
3. INSPECT DIFF. LOCK COMPONENTS
(a) Inspect the relay operation.
(1) Jack up the vehicle.
(2) Use a heater main relay and connect it, as shown
below.
NOTICE:
Connect the terminals being careful not to touch the neigh-
boring terminals or metallic parts of the relay housing.
(3) Rotate the tire and check that differential lock has
occurred.
If operation is not as specified, replace the actuator.
(b) Inspect the diff. lock control switch continuity.
Inspect the switch continuity between terminal 1 to termi-
nal 4.
HINT:
If continuity dose not exist, replace the switch.
(c) Inspect the diff. lock indicator switch.
(1) Check that continuity between exists terminals
when the switch is pushed (differential connected
position).
(2) Check that no continuity exists when the switch is
free (differential disconnected position).
HINT:
If operation is not as specified, replace the switch.
Page 2893 of 3115
SA-166
- SUSPENSION AND AXLEDIFFERENTIAL LOCKING SYSTEM
2116 Author: Date:
2004 LAND CRUISER (RM1071U)
(d) Inspect the L position switch (See page TR-49).
(e) Inspect the vehicle speed sensor (See page BE-63).
Page 2894 of 3115

SA167-05
F05181
F05083
F04360
SA-168
- SUSPENSION AND AXLEDIFFERENTIAL LOCKING SYSTEM
2118 Author: Date:
2004 LAND CRUISER (RM1071U)
REMOVAL
1. SHIFTING REAR DIFF. LOCK POSITION
(a) Turn the ignition switch to the ON position.
(b) Shift the transfer shift lever to L position.
(c) Turn the differential lock control switch to the RR position
and lock the rear differential.
HINT:
While rotating the rear wheels, check they are in the differential
lock condition.
(d) Disconnect the cable from the negative terminal of the
battery.
2. REMOVE NO. 1 ACTUATOR PROTECTOR
Remove the nut, bolt and No. 1 actuator protector.
3. REMOVE NO. 2 ACTUATOR PROTECTOR
Remove the 2 nuts and No. 2 actuator protector.
4. DISCONNECT CONNECTORS AND TUBE
5. REMOVE REAR DIFF. LOCK POSITION SWITCH
6. REMOVE COVER
(a) Remove the 3 bolts.
(b) Using a brass bar and hammer, remove the cover.
7. REMOVE ACTUATOR
(a) Remove the shift fork set bolt.
(b) Remove the 4 bolts.
(c) Using a screwdriver, pry out the actuator.
Page 2895 of 3115
SA143-04
F05256
123 (1,250, 91)
74 (750, 54)
Disc
Bearing
Oil Seal
Bearing
Lock Washer
Gasket
Snap Ring Axle Hub
Hub BoltClaw Washer
Adjusting Nut
Lock Nut
Flange
Grease Cap
33 (335, 24)
Brake Caliper
x6
Non-reusable part
N´m (kgf´cm, ft´lbf) : Specified torquex5
28 (290, 21)
Cone Washer
64 (650, 47)
Flexible Hose
See Page SA-16
- SUSPENSION AND AXLEFRONT AXLE HUB
SA-1 1
1961 Author: Date:
2004 LAND CRUISER (RM1071U)
FRONT AXLE HUB
COMPONENTS
Page 2896 of 3115
SA145-04
F04408
F04339
F04340
Matchmarks
- SUSPENSION AND AXLEFRONT AXLE HUB
SA-13
1963 Author: Date:
2004 LAND CRUISER (RM1071U)
DISASSEMBLY
1. REMOVE OIL SEAL AND BEARING
(a) Using a screwdriver, pry out the oil seal.
(b) Remove the bearing from the axle hub.
2. REMOVE BEARING OUTER RACES
(a) Using a brass bar and hammer, remove the outside bear-
ing outer race.
NOTICE:
Be careful not to damage the ABS speed sensor rotor.
(b) Using a brass bar and hammer, remove the inside bearing
outer race.
3. INSPECT BEARINGS
Clean the bearings and outer races and inspect them for wear
or damage.
4. REMOVE DISC
(a) Mount the axle hub with the disc in a soft jaw vice.
NOTICE:
Close vice until it holds disc, do not tighten further.
(b) Place matchmarks on the axle hub and disc.
(c) Remove the 5 bolts and separate the axle hub and disc.