DTC C1622: Back Camera Disconnected [08/2015 - ]: Procedure

1. Disconnect the I196 radio and display receiver assembly connector.
2. Disconnect the T23 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
   I196-11 (CA+) - T23-6 (CB+)	Always	Below 1 Ω
   I196-12 (V+) - T23-3 (CV+)	Always	Below 1 Ω
   I196-24 (V-) - T23-2 (CV-)	Always	Below 1 Ω
   I196-23 (CGND) - T23-5 (CGND)	Always	Below 1 Ω
   I196-11 (CA+) - Body ground	Always	10 kΩ or higher
   I196-12 (V+) - Body ground	Always	10 kΩ or higher
   I196-24 (V-) - Body ground	Always	10 kΩ or higher
   I196-23 (CGND) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the I196 radio and display receiver 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
   I196-23 (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
   I196-11 (CA+) - I196-23 (CGND)	Engine switch on (ACC)	5.5 to 7.05 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Radio and Display Receiver Assembly)

NG → See step   5 

OK: Go to next step 

1. Reconnect the T23 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 (Radio and Display Receiver 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 radio and display receiver assembly with the connector connected.

   OK

   Waveform is similar to that shown in the illustration.

   Item	Content
   Measurement terminal	I196-12 (V+) - I64-7 (GND1)
   Measurement setting	200 mV/DIV., 50 μs./DIV.
   Condition	Engine 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 engine 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

NG → See step   4 

OK → See step   5