Select 2-4 And High-Low System: Inspection: Notes

WARNING: This page is about a different variant/trim than selected.

NOTE:

A/T:
Switch the 4-wheel drive control switch when the A/T shift lever is in the N position and the vehicle speed is 5 km/h or less.
M/T:
Switch the 4-wheel drive control switch when the clutch start switch is turned ON and the vehicle speed is 3 km/h or less.
Do not change from H2 to H4 when the vehicle speed is 100 km/h or more.

INSPECT H2 (2WD)-H4 (4WD) SHIFT
1. Start the engine.
2. Turn the 4-wheel drive control switch from the H2 to the H4 position.
3. Check that the 4WD indicator light blinks and then stays on.
4. Turn the 4-wheel drive control switch from the H4 to the H2 position
5. Check that the 4WD indicator light blinks and then goes off.
  
  Fig 1: Inspecting H2 (2WD)-H4 (4WD) Shift
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT H4(4WD)-L4(4WD) SHIFT
1. Start the engine.
2. Turn the 4-wheel drive control switch from the H4 to the L4 position while pressing it.
3. Check that the 4LO indicator light blinks and then stays on.
4. Turn the 4-wheel drive control switch from the L4 to the H4 position while pressing it.
5. Check that the 4LO indicator light blinks and then goes off.
  
  Fig 2: Inspecting H4(4WD)-L4(4WD) Shift
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT H2 (2WD)-L4 (4WD) SHIFT
1. Start the engine.
2. Turn the 4-wheel drive control switch from the H2 to the H4 position.
3. Check that the 4WD indicator light blinks and then stays on.
4. Turn the 4-wheel drive control switch from the H4 to the L4 position while pressing it.
5. Check that the 4LO indicator light blinks and then stays on.
  
  Fig 3: Inspecting H2 (2WD)-L4 (4WD) Shift
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT L4 (4WD)-H2 (2WD) SHIFT
1. Start the engine.
2. Turn the 4-wheel drive control switch from the L4 to the H4 position while pressing it.
3. Check that the 4LO indicator light blinks and then goes off.
4. Turn the 4-wheel drive control switch from the H4 to the H2 position.
5. Check that the 4WD indicator light blinks and then goes off.

INSPECT 4-WHEEL DRIVE CONTROL SWITCH

Remove the center instrument cluster finish panel sub-assy.
Remove the 4-wheel drive control switch from the center instrument cluster finish panel sub-assy.

Fig 4: Inspecting 4-Wheel Drive Control Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Using an ohmmeter, measure the resistance between the terminals.

RESISTANCE CONDITION

Switch position	Tester connection	Specified condition
H2	5 (2-4) --> 4 (GND)	Below 1Ω
H4	5 (2-4) --> 4 (GND)	Below 1Ω
H4	5 (2-4) --> 4 (GND)	100 kΩ or higher
H4	2 (LO) --> 4 (GND)	Below 1Ω
H4	2 (LO) --> 4 (GND)	100 kΩ or higher
L4	2 (LO) --> 4 (GND)	Below 1Ω

If the results are not as specified, replace the 4-wheel drive control switch or bulb.

Fig 5: Identifying Control Switch Connector Terminals

INSPECT ACTUATOR RESISTANCE
1. Using an ohmmeter, measure the resistance between terminals 1 and 2.
  Standard resistance: 0.3 to 100 Ω
2. Using an ohmmeter, measure the resistance between terminals 1 or 2 and the body ground.
  Standard resistance: More than 0.5 MΩ
If the results are not as specified, replace the shift actuator assy.

Fig 6: Identifying Actuator Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT ACTUATOR OPERATION
1. H2 (2WD) --> H4 shift:
  Connect the lines via the relay , then check that the actuator fork shaft moves from the H2 (2WD) to the H4 positions. See Fig 7.
  
  Fig 7: Inspecting Actuator Operation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. H4 --> H2 (2WD) shift:
  Connect the lines via the relay , then check that the actuator fork shaft moves from the H4 to the H2 (2WD) positions. See Fig 8.
  
  Fig 8: Checking Actuator Fork Shaft Moves From H4 To H2 (2WD) Positions
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. H4 --> L4 shift:
  Connect the lines via the relay , then check that the actuator fork shaft moves from the H4 to the L4 positions. See Fig 9.
  
  Fig 9: Checking Actuator Fork Shaft Moves From H4 To L4 Positions
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. L4 --> H4 shift:
  Connect the lines via the relay , then check that the actuator fork shaft moves from the L4 to the H4 positions. See Fig 10.
  
  Fig 10: Checking Actuator Fork Shaft Moves From L4 To H4 Positions
  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 the relay housing.

Fig 11: Identifying Relay Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT LIMIT SWITCH CONTINUITY
1. Start the engine and lift the vehicle up.
2. With the actuator connector connected, after checking the operating sound, disconnect the connector and inspect the continuity between the terminals using an ohm-meter.
HINT: When shifting the actuator fork shaft, connect the connectors.

Fig 12: Tester Connection And Continuity Condition Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 13: Identifying Actuator Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT 4-WHEEL DRIVE CONTROL ECU
1. Connect the wire harness side connector to the 4-wheel drive control ECU and inspect the wire harness side connector from the back side, as shown.
  
  Fig 14: Identifying ECU Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002