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
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT CENTER DIFF. LOCK CONTROL RELAY
1. Check that continuity exists between each terminal, as shown in the chart.
  
  Fig 3: Tester Connected Terminal Number And Specified Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 4: Identifying Center Diff. Lock Control Relay Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  *: 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.
2. Apply battery positive voltage between each terminal and check that continuity exists between each terminal, as shown in the chart.
  
  Fig 5: Tester Connected Terminal Number And Specified Condition Table With Voltage Applied
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If continuity is not as specified, replace the relay.
INSPECT ACTUATOR OPERATION
1. Raise up the front wheels, place the stopper under the rear wheels to block them, and pull up the parking brake.
2. Disconnect the connector of the actuator and connect it to the relay using wire.
3. Check that the front propeller shaft can be rotated by hand.
  
  Fig 6: Actuator Inspection Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 7: Inspecting Actuator Operation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 8: Inspecting Actuator Operation (Heater Main Relay)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 9: Identifying Actuator Motor Connector And Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT CENTER DIFF. LOCK SWITCH CONTINUITY
1. Remove the center diff. lock switch
2. Inspect the continuity between each terminal.
  
  Fig 10: Specified Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 11: Inspecting Center Diff. Lock Switch Continuity
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 12: Identifying Transfer Indicator Switch & Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002