4WD Control Switch Circuit [08/2019 - 08/2021]: Procedure

1. Confirm the problem symptoms.

   Result

   Result	Proceed to
   The 4LO indicator light remains off after operating the transfer position switch (combination switch assembly) to L4	A
   The 4LO indicator light remains on after operating the transfer position switch (combination switch assembly) to H4	B

Result: 

B 

See step  8

Result: 

A 

See step  2

HINT: 

Perform the following procedure with the vehicle stopped.

1. Turn the engine switch on (IG).
2. Move the shift lever to N.
3. Turn the transfer position switch (combination switch assembly) to L4.
4. Check the 4LO indicator light.

   Result

   Result	Proceed to
   The 4LO indicator light remains off	A
   The 4LO indicator light is blinking or illuminated	B

   1. Blinking: Blinks at 0.5 second intervals (0.5 seconds on and 0.5 seconds off)

Result: 

B 

END 

Result: 

A 

See step  3

1. Select "Bus Check" from the System Selection Menu screen, and follow the prompts on the screen to inspect the CAN bus.

   Refer to DIAGNOSIS SYSTEM [08/2019 - 08/2020] , or refer to DIAGNOSIS SYSTEM [08/2020 - 08/2021]

   OK

   "Bus Check" indicates no malfunctions in CAN communication.

   Result

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

Result: 

B 

CHECK CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] 

Result: 

A 

See step  4

1. Turn the engine switch off.
2. Connect the Techstream to the DLC3.
3. Turn the Techstream on.
4. Turn the engine switch on (IG).
5. Enter the following menus: Powertrain / Four Wheel Drive / Data List.
6. According to the display on the Techstream, read the Data List.
   FOUR WHEEL DRIVE
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Transfer Position Control SW	Transfer position switch status/ ON or OFF	ON: L4 OFF: H4	-

   OK

   Display changes according to transfer position switch (combination switch assembly) operation.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  6

Result: 

OK 

See step  5

1. Turn the engine switch off.
2. Perform an Active Test of the combination meter assembly using the Techstream.

   Refer to DATA LIST / ACTIVE TEST [08/2019 - ]

3. Check the combination meter assembly.

   OK

   The 4LO indicator light turns on or off in accordance with the Techstream.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE 4 WHEEL DRIVE CONTROL ECU. Refer to  REMOVAL [08/2015 - ] 

Result: 

NG 

CHECK METER / GAUGE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] 

1. Remove the transfer position switch (combination switch assembly).

   Refer to REMOVAL [08/2015 - 08/2021]

2. Inspect the transfer position switch (combination switch assembly.

   Refer to INSPECTION [08/2015 - 08/2021]

   OK

   The transfer position switch (combination switch assembly) operates normally.

   Result

   Result	Proceed to
   OK	A
   NG	B

Result: 

B 

REPLACE COMBINATION SWITCH ASSEMBLY. Refer to  REMOVAL [08/2015 - 08/2021] 

Result: 

A 

See step  7

1. Disconnect the G41 4 wheel drive control ECU connector.
2. Disconnect the i5 transfer position switch (combination switch assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G41-13 (LO) - i5-2 (LO)	Always	Below 1 Ω
   G41-13 (LO) or i5-2 (LO) - Body ground	Always	10 kΩ or higher
   i5-9 (E) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE 4 WHEEL DRIVE CONTROL ECU. Refer to  REMOVAL [08/2015 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

HINT: 

Perform the following procedure with the vehicle stopped.

1. Turn the engine switch on (IG).
2. Move the shift lever to N.
3. Turn the transfer position switch (combination switch assembly) to L4.
4. Check the 4LO indicator light.

   Result

   Result	Proceed to
   The 4LO indicator light remains illuminated	A
   The 4LO indicator light is blinking or illuminated	B

   1. Blinking: Blinks at 0.5 second intervals (0.5 seconds on and 0.5 seconds off)

Result: 

B 

END 

Result: 

A 

See step  9

1. Select "Bus Check" from the System Selection Menu screen, and follow the prompts on the screen to inspect the CAN bus.

   Refer to DIAGNOSIS SYSTEM [08/2019 - 08/2020] , or refer to DIAGNOSIS SYSTEM [08/2020 - 08/2021]

   OK

   "Bus Check" indicates no malfunctions in CAN communication.

   Result

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

Result: 

B 

CHECK CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] 

Result: 

A 

See step  10

1. Turn the engine switch off.
2. Connect the Techstream to the DLC3.
3. Turn the Techstream on.
4. Turn the engine switch on (IG).
5. Enter the following menus: Powertrain / Four Wheel Drive / Data List.
6. According to the display on the Techstream, read the Data List.
   FOUR WHEEL DRIVE
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   L4 Indicator Request	4LO indicator light request/ Blink3, Blink2*, Blink1, ON, OFF	Blink3: Indicator light rapidly blinks Blink1: Indicator light blinks ON: Indicator light illuminates OFF: Indicator light turns off	Blinking: 0.5 second intervals (0.5 seconds on and 0.5 seconds off) Rapidly blinking: 0.25 second intervals (0.25 seconds on and 0.25 seconds off)

   1. *: Item not equipped, therefore not displayed
   1. Operate the transfer position switch (combination switch assembly) several times between H4 and L4, and then check the Techstream display condition of the 4LO indicator light.

      Result

      Result	Proceed to
      Data List continues to display ON even when transfer position switch (combination switch assembly) is operated	A
      Data List display changes according to transfer position switch (combination switch assembly) operation	B

Result: 

A 

REPLACE 4 WHEEL DRIVE CONTROL ECU. Refer to  REMOVAL [08/2015 - ] 

Result: 

B 

CHECK METER / GAUGE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ]