Center Differential Lock Switch Circuit [08/2019 - ]: Procedure

1. Turn the engine switch on (IG).
2. Check the center differential lock indicator light.
3. Press the center differential lock switch.
4. After 60 seconds, check the center differential lock indicator light.

   Result

   Result	Proceed to
   The center differential lock indicator light blinks, turns off or illuminates	A
   Center differential lock indicator light remains off regardless of switch operation	B
   Center differential lock indicator remains illuminated regardless of switch operation	C
   Center differential lock indicator light rapidly blinks	D

   1. Blinking: Blinks at 0.5 second intervals (0.5 seconds on and 0.5 seconds off)
   2. Rapidly blinking: Blinks at 0.25 second intervals (0.25 seconds on and 0.25 seconds off)

Result: 

A 

END 

Result: 

C 

See step  7

Result: 

D 

Go to P17D0. Refer to  DTC P17D0: Center Differential Lock Control SW Circuit [08/2019 - ]  

Result: 

B 

See step  2

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] , or refer to DIAGNOSIS SYSTEM [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  3

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
   Center Differential Lock Control SW	Center differential lock switch status/ ON or OFF	ON: Switch pressed and held OFF: Switch not pressed	-

   OK

   Display changes according to center differential lock switch operation.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  5

Result: 

OK 

See step  4

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 center differential lock 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 

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

1. Remove the center differential lock switch.

   Refer to REMOVAL [08/2015 - ]

2. Inspect the center differential lock switch.

   Refer to INSPECTION [08/2015 - ]

   OK

   The center differential lock switch operates normally.

   Result

   Result	Proceed to
   OK	A
   NG	B

Result: 

B 

REPLACE CENTER DIFFERENTIAL LOCK SWITCH. Refer to  REMOVAL [08/2015 - ] 

Result: 

A 

See step  6

1. Disconnect the G41 4 wheel drive control ECU connector.
2. Disconnect the G9 center differential lock switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G41-6 (DL) - G9-9 (CPU)	Always	Below 1 Ω
   G9-6 (L) - 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 

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] , or refer to DIAGNOSIS SYSTEM [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  8

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
   Center Differential Lock Indicator Request	Center differential lock indicator light request/ Blink3, Blink2, Blink1, ON or OFF	Blink3: Indicator light rapidly blinks Blink2: Indicator light blinks 3 times 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. Turn the center differential lock switch on and off several times and check the Techstream display condition of the center differential lock indicator light.

      Result

      Result	Proceed to
      Data List continues to display ON even when center differential lock switch is operated	A
      Data List display changes according to center differential lock switch operation	B

Result: 

A 

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

Result: 

B 

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