Motor Shift Control System: Inspection

INSPECT SWITCH POSITION
1. Start the engine, and shift the transfer shift lever to the "H" position.
2. Check that the center diff. indicator light comes on when the switch is in "ON" position. Check that the light goes off when the switch is in "OFF" position.
Fig 1: Inspecting Switch Position
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INSPECT SHIFT LEVER POSITION
1. Start the engine, and turn the center diff. lock switch to OFF.
2. Check that the center diff. indicator light comes on when the transfer shift lever is shifted to the "L" position. Check that the light goes off when the lever is shifted to the "N" or "H" position.
Fig 2: Inspecting Shift Lever Position
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INSPECT CENTER DIFF. LOCK CONTROL RELAY

Check that continuity exists between each terminal, as shown in the chart.

SPECIFIED CONDITION

Tester connected terminal number

Specified condition

1 -2

Continuity

2 - 4

Continuity

6 - 7

⁽¹⁾

⁽¹⁾	There is a diode between the terminals 6 and 7.

If no continuity exists, check that continuity exists when changing the position of (-) probe for the position of negative (-) probe of tester,

Fig 3: Identifying Center Diff. Lock Control Relay Connector

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Apply battery positive voltage between each terminal and check that continuity exists between each terminal, as shown in the chart.

Fig 4: Relay Specified Condition Chart

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If continuity is not as specified, replace the relay.

INSPECT ACTUATOR OPERATION

Raise up the front wheels, place the stopper under the rear wheels to block them, and pull up the parking brake.
Disconnect the connector of the actuator and connect it to the relay using wire.
Check that the front propeller shaft can be rotated by hand.

INSPECTION ITEM REFERENCE

Inspection Item	Standard
Center Diff. Free --> Lock	Front propeller shaft cannot be rotated.
Center Diff. Lock --> Free	Front propeller shaft can be rotated.

Fig 5: Inspecting Actuator Operation

HINT:

When inspecting the operation described above, use a heater main relay.

NOTE: Connect the terminals being careful not to touch the neighboring terminals or metallic parts of relay housing.

Fig 6: Identifying Heater Main Relay

INSPECT MOTOR ACTUATOR (MOTOR)
1. Remove the motor actuator (See DISASSEMBLY ).
2. Measure the resistance between the terminals 1 and 5.
  Standard resistance: 0.3 - 100 Ω
3. Measure the resistance between the terminals 1 or 5 and body ground.
  Standard resistance: More than 0.5 MΩ
If the resistance value is not as specified, replace the motor actuator.

Fig 7: Identifying Connector Terminals
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INSPECT CENTER DIFF. LOCK SWITCH CONTINUITY
1. Remove the center diff. lock switch (See DISASSEMBLY ).
2. Inspect the continuity between each terminal.
Fig 8: Specified Condition Chart
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Fig 9: Identifying Center Diff Lock Switch Terminals
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INSPECT TRANSFER INDICATOR SWITCH CONTINUITY
1. Remove the 3 transfer indicator switches (See DISASSEMBLY ).
2. Check that continuity exists between terminals 1 and 2 when pushing the ball at the tip of the switch.
Fig 10: Inspecting Transfer Indicator Switch Continuity
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