DTC P17D0: Center Differential Lock Control SW Circuit [08/2019 - ]: Procedure

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
   G41-6 (DL) or G9-9 (CPU) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

1. Disconnect the G9 center differential lock switch connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Center Differential Lock Switch)

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   9 (CPU) - 6 (L)	Switch not pressed	10 kΩ or higher

   Result

   Result	Proceed to
   OK	A
   NG	B

Result: 

A 

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

Result: 

B 

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