DTC P17D0: Center Differential Lock Control SW Circuit [09/2015 - ]: Procedure

1. Disconnect the A27 4 wheel drive control ECU connector.
2. Disconnect the V12 center differential lock switch (integration control and panel assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A27-14 (DL) - V12-18 (CPU)	Always	Below 1 Ω
   V12-1 (E) - Body ground	Always	Below 1 Ω
   A27-14 (DL) or V12-18 (CPU) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the V12 center differential lock switch (integration control and panel assembly) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   18 (CPU) - 1 (E)	Switch not pressed	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   * a	Component without harness connected (Center Differential Lock Switch (Integration Control and Panel Assembly))

Result: 

OK 

REPLACE 4 WHEEL DRIVE CONTROL ECU 

Refer to REMOVAL [09/2015 - ] )

Result: 

NG 

REPLACE INTEGRATION CONTROL & PANEL ASSEMBLY 

Refer to REMOVAL [09/2015 - ] )