DTC C1621: Back Camera Power Supply Failure [11/2016 - ]: Procedure

1. Disconnect the F117 navigation receiver assembly connector.
2. Disconnect the X12 television camera assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F117-11 (CA+) - X12-6 (CB+)	Always	Below 1 Ω
   F117-23 (CGND) - X12-5 (CGND)	Always	Below 1 Ω
   F117-11 (CA+) - F117-23 (CGND)	Always	10 kΩ or higher
   F117-11 (CA+) - Body ground	Always	10 kΩ or higher
   F117-23 (CGND) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

OK 

See step  2

1. Reconnect the F117 navigation receiver assembly connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F117-11 (CA+) - F117-23 (CGND)	Engine switch on (ACC)	5.5 to 7.05 V

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Navigation Receiver Assembly)

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

REPLACE TELEVISION CAMERA ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

Result:  2

NG 

REPLACE NAVIGATION RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2013 - ]