DTC C1622: Back Camera Disconnected [10/2014 - ]: Procedure

1. Disconnect the E28 navigation ECU sub-assembly connector.
2. Disconnect the O18 rear television camera assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E28-11 (CA+) - O18-6 (CB+)	Always	Below 1 Ω
   E28-12 (V+) - O18-3 (CV+)	Always	Below 1 Ω
   E28-24 (V-) - O18-2 (CV-)	Always	Below 1 Ω
   E28-23 (CGND) - O18-5 (CGND)	Always	Below 1 Ω
   E28-11 (CA+) - Body ground	Always	10 kΩ or higher
   E28-12 (V+) - Body ground	Always	10 kΩ or higher
   E28-24 (V-) - Body ground	Always	10 kΩ or higher
   E28-23 (CGND) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

1. Reconnect the E28 navigation ECU sub-assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E28-23 (CGND) - Body ground	Always	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   E28-11 (CA+) - E28-23 (CGND)	Power switch on (ACC)	5.5 to 7.05 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Navigation ECU Sub-assembly)

Result: 

NG 

REPLACE NAVIGATION ECU SUB-ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )

Result: 

OK 

See step  3

1. Reconnect the O18 rear television camera assembly connector.
2. Using an oscilloscope, check the waveform of the rear television camera assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Navigation ECU Sub-assembly)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT: 

   A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the navigation ECU sub-assembly with the connector connected.

   OK

   Waveform is similar to that shown in the illustration.

   Item	Content
   Measurement terminal	E28-12 (V+) - E17-7 (GND1)
   Measurement setting	200 mV/DIV., 50 μs./DIV.
   Condition	Power switch on (IG), shift lever in R

   HINT: 

   • The video waveform changes according to the image sent by the rear television camera assembly.
   • The video waveform is constantly output when the power switch is on (ACC).
   TEXT IN ILLUSTRATION
   
   

   *a	Waveform 1 (camera lens is not covered, displaying an image)	*b	Waveform 2 (camera lens is covered, blacking out the screen)
   *c	Synchronization Signal	*d	Video Waveform

Result: 

OK 

REPLACE NAVIGATION ECU SUB-ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )

Result: 

NG 

REPLACE REAR TELEVISION CAMERA ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )