Back Door Entry Lock and Unlock Functions do not Operate [08/2015 - 08/2019]: Procedure

1. When the door control switch on the multiplex network master switch assembly is operated, check that the doors unlock and lock according to the switch operation (Refer to OPERATION CHECK [08/2015 - 08/2019] ).

   OK

   Door locks operate normally.

Result: 

NG 

GO TO POWER DOOR LOCK CONTROL SYSTEM 

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

Result: 

OK 

See step  2

1. Bring the electrical key transmitter approximately 0.3 m (0.984 ft.) from the electrical key antenna (outside luggage) and perform an entry back door unlock function check (Refer to OPERATION CHECK [08/2015 - 08/2019] ).
   NOTE:

   If the key is brought within 0.2 m (0.656 ft.) of the rear bumper, communication may not possible.

   HINT: 

   If the inspection result is that the problem only occurs in certain locations or at certain times of day, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.

   OK

   Entry function operates normally.

Result: 

OK 

AFFECTED BY WAVE INTERFERENCE 

Result: 

NG 

See step  3

1. Check the following antenna in the key diagnostic mode (Refer to SYSTEM DESCRIPTION [08/2015 - 08/2019] ).
   1. Check the electrical key antenna (outside luggage).

      When the electrical key transmitter is brought within 0.7 to 1.0 m (2.30 to 3.28 ft.) of the electrical key antenna (outside luggage), check that the wireless door lock buzzer sounds.

      OK

      Wireless door lock buzzer sounds.

Result: 

OK 

REPLACE CERTIFICATION ECU 

(Refer to REMOVAL [08/2015 - 08/2019] )

Result: 

NG 

See step  4

1. Disconnect the N21 antenna connector.
2. Disconnect the F78 ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   N21-1 (CLG5) - F78-19 (CLG8)	Always	Below 1 Ω
   N21-2 (CLGB) - F78-20 (CG8B)	Always	Below 1 Ω
   F78-19 (CLG8) - Body ground	Always	10 kΩ or higher
   F78-20 (CG8B) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Remove the electrical key antenna (outside luggage) (Refer to REMOVAL [08/2015 - ] ).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 (CLG5) - 2 (CLGB)	Always	Below 1 Ω

Result: 

OK 

REPLACE CERTIFICATION ECU 

(Refer to REMOVAL [08/2015 - 08/2019] )

Result: 

NG 

REPLACE ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE) 

(Refer to REMOVAL [08/2015 - ] )