DTC C1622: Back Camera Disconnected [06/2018 - 09/2022]: Procedure

1. Disconnect the G22 multi-display assembly connector.
2. Disconnect the T1 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
   G22-10 (CA+) - T1-6 (CB+)	Always	Below 1 Ω
   G22-8 (V+) - T1-3 (CV+)	Always	Below 1 Ω
   G22-9 (V-) - T1-2 (CV-)	Always	Below 1 Ω
   G22-21 (CGND) - T1-5 (CGND)	Always	Below 1 Ω
   G22-10 (CA+) or T1-6 (CB+) - Body ground	Always	10 kΩ or higher
   G22-8 (V+) or T1-3 (CV+) - Body ground	Always	10 kΩ or higher
   G22-9 (V-) or T1-2 (CV-) - Body ground	Always	10 kΩ or higher
   G22-21 (CGND) or T1-5 (CGND) - Body ground	Always	10 kΩ or higher
   G22-20 (CSLD) - 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 G22 multi-display assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G22-21 (CGND) - Body ground	Always	Below 1 Ω

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Multi-display Assembly)

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   G22-10 (CA+) - G22-21 (CGND)	Engine switch on (ACC)	5.5 to 7.05 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE MULTI-DISPLAY ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - ] 

Result: 

OK 

See step  3

1. Reconnect the T1 rear television camera assembly connector.
2. Using an oscilloscope, check the waveform of the rear television camera assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Multi-display Assembly)

   HINT: 

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

   OK

   Waveform is similar to that shown in the illustration.

   Item	Content
   Measurement terminal	G22-8 (V+) - G22-13 (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).
   Fig 1: Waveform 1 & Waveform 2 (V+, GND1)

   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: 

NG 

REPLACE REAR TELEVISION CAMERA ASSEMBLY. Refer to  REMOVAL [06/2018 - 09/2022] 

Result: 

OK 

See step  4

1. Replace the multi-display assembly with a new or known good one.

   Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Clear the DTCs.

   Body Electrical > Navigation System > Clear DTCs 

2. Recheck for DTCs and check that no DTCs are output.

   Body Electrical > Navigation System > Trouble Codes 

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - 09/2022]