TC and CG Terminal Circuit [10/2014 - 05/2019]: Procedure

1. Check if the CAN communication system DTC is output.

   Refer to DIAGNOSIS SYSTEM [10/2014 - 09/2017] , or refer to DIAGNOSIS SYSTEM [09/2017 - 05/2018] , or refer to DIAGNOSIS SYSTEM [05/2018 - 05/2019]

   Result

   Proceed to
   CAN communication system DTC is not output
   CAN communication system DTC is output

Result: 

CAN communication system DTC is output 

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2017 - 05/2019] 

Result: 

CAN communication system DTC is not output 

See step  2

1. Turn the engine switch on (IG).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of DLC3

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   I7-13 (TC) - I7-4 (CG)	Engine switch on (IG)	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  4

Result: 

OK 

See step  3

1. Replace the ECM.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of DLC3

   Refer to REMOVAL [10/2014 - 05/2019]

2. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
   • SST: 09843-18040 
3. Turn the engine switch on (IG).
4. Check that the "DIAG AWD FF" or "DIAG AWD XX (DTC)" is displayed.

   Result

   Result	Proceed to
   "DIAG AWD FF" or "DIAG AWD XX (DTC)" is displayed	A
   "DIAG AWD FF" and "DIAG AWD XX (DTC)" are not displayed	B

Result: 

A 

END 

Result: 

B 

REPLACE 4WD ECU ASSEMBLY. Refer to  REMOVAL [10/2014 - 05/2019] 

1. Turn the engine switch off.
2. Disconnect the A35 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I7-13 (TC) - A35-33 (TC)	Always	Below 1 Ω
   I7-13 (TC) or A35-33 (TC) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Reconnect the A35 ECM connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I7-4 (CG) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of DLC3

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Replace the ECM.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of DLC3

   Refer to REMOVAL [10/2014 - 05/2019]

2. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
   • SST: 09843-18040 
3. Turn the engine switch on (IG).
4. Check that the "DIAG AWD FF" or "DIAG AWD XX (DTC)" is displayed.

   Result

   Result	Proceed to
   "DIAG AWD FF" or "DIAG AWD XX (DTC)" is displayed	A
   "DIAG AWD FF" and "DIAG AWD XX (DTC)" are not displayed	B

Result: 

A 

END 

Result: 

B 

REPLACE 4WD ECU ASSEMBLY. Refer to  REMOVAL [10/2014 - 05/2019]