DTC C1282: Center Differential Lock Position Switch [08/2015 - 08/2019]: Procedure

1. Confirm the vehicle specifications.
   RESULT
   
   

   Result	Proceed to
   for Part-time 4WD	A
   for Full-time 4WD	B

Result: 

B 

See step  5

Result: 

A 

See step  2

1. Disconnect the A6 skid control ECU connector.
2. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A6-27 (EXI) - Body ground	Ignition switch ON Transfer 2WD position	11 to 14 V
   	Ignition switch ON Transfer 4WD position	Below 1.5 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Skid Control ECU)

Result: 

NG 

See step  4

Result: 

OK 

See step  3

1. Switch the vehicle to test mode, perform the 4WD detection switch signal check, and then check that DTC C1282 is cleared (Refer to TEST MODE PROCEDURE [08/2015 - 08/2019] ).
   RESULT
   
   

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

Result: 

A 

REPLACE MASTER CYLINDER SOLENOID 

(Refer to DISASSEMBLY [08/2015 - ] )

Result: 

B 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] )

1. Disconnect the A6 skid control ECU connector.
2. Disconnect the F47 four wheel drive control ECU connector.
3. Disconnect the D1 A.D.D. actuator connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   W/ REAR DIFFERENTIAL LOCK
   
   

   Tester Connection	Condition	Specified Condition
   A6-27 (EXI) - F47-15 (ADD)	Always	Below 1 Ω
   A6-27 (EXI) - D1-3 (ADD)	Always	Below 1 Ω
   A6-27 (EXI) - Body ground	Always	10 kΩ or higher

   W/O REAR DIFFERENTIAL LOCK
   
   

   Tester Connection	Condition	Specified Condition
   A6-27 (EXI) - F47-14 (ADD)	Always	Below 1 Ω
   A6-27 (EXI) - D1-3 (ADD)	Always	Below 1 Ω
   A6-27 (EXI) - Body ground	Always	10 kΩ or higher

Result: 

OK 

GO TO TRANSFER SYSTEM (PROBLEM SYMPTOMS TABLE) 

(Refer to PROBLEM SYMPTOMS TABLE [08/2015 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the A6 skid control ECU connector.
2. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A6-27 (EXI) - Body ground	Ignition switch ON Center differential free	11 to 14 V
   	Ignition switch ON Center differential locked	Below 1.5 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Skid Control ECU)

Result: 

NG 

See step  7

Result: 

OK 

See step  6

1. Switch the vehicle to test mode, perform the center differential lock detection signal check, and then check that DTC C1282 is cleared (Refer to TEST MODE PROCEDURE [08/2015 - 08/2019] ).
   RESULT
   
   

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

Result: 

A 

REPLACE MASTER CYLINDER SOLENOID 

(Refer to DISASSEMBLY [08/2015 - ] )

Result: 

B 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] )

1. Disconnect the A6 skid control ECU connector.
2. Disconnect the F47 four wheel drive control ECU connector.
3. Disconnect the B47 transfer shift actuator assembly connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A6-27 (EXI) - F47-14 (P1)	Always	Below 1 Ω
   A6-27 (EXI) - B47-9 (CDL)	Always	Below 1 Ω
   A6-27 (EXI) - Body ground	Always	10 kΩ or higher

Result: 

OK 

GO TO TRANSFER SYSTEM (PROBLEM SYMPTOMS TABLE) 

(Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 08/2019] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR