DTC C1622: Back Camera Disconnected [04/2018 - ]: Procedure

1. Disconnect the G2 radio and display receiver assembly connector.
2. Disconnect the P19 television camera assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G2-30 (CA+) - P19-6 (CB+)	Always	Below 1 Ω
   G2-28 (V+) - P19-3 (CV+)	Always	Below 1 Ω
   G2-29 (V-) - P19-2 (CV-)	Always	Below 1 Ω
   G2-27 (CGND) - P19-5 (CGND)	Always	Below 1 Ω
   G2-26 (CSLD) - Body ground	Always	10 kΩ or higher
   G2-30 (CA+) or P19-6 (CB+) - Body ground	Always	10 kΩ or higher
   G2-28 (V+) or P19-3 (CV+) - Body ground	Always	10 kΩ or higher
   G2-29 (V-) or P19-2 (CV-) - Body ground	Always	10 kΩ or higher
   G2-27 (CGND) or P19-5 (CGND) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

1. Reconnect the G2 radio and display receiver assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G2-29 (V-) - Body ground	Always	Below 1 Ω
   G2-27 (CGND) - Body ground	Always	Below 1 Ω

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   G2-30 (CA+) - G2-27 (CGND)	Engine switch on (ACC)	5.5 to 7.05 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [04/2018 - ] 

Result: 

OK 

See step  3

1. Reconnect the P19 television camera assembly connector.
2. Using an oscilloscope, check the waveform of the television camera assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   HINT: 

   A waterproof connector is used for the 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	G2-28 (V+) - G3-1 (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 television camera assembly.
   • The video waveform is constantly output when the engine switch is on (ACC).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *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

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [04/2018 - ] 

Result: 

NG 

REPLACE TELEVISION CAMERA ASSEMBLY. Refer to  REMOVAL [04/2018 - ]