PARK ASSIST / MONITORING: PARKING ASSIST MONITOR SYSTEM: C1621,C1622; Back Camera Power Supply Failure; 2016 - 2017 MY Sienna [12/2015

Last Modified: 04-05-2023	6.11:8.1.0	Doc ID: RM100000000VJ8E
Model Year Start: 2016	Model: Sienna	Prod Date Range: [12/2015 - 11/2017]
Title: PARK ASSIST / MONITORING: PARKING ASSIST MONITOR SYSTEM: C1621,C1622; Back Camera Power Supply Failure; 2016 - 2017 MY Sienna [12/2015 - 11/2017]

DTC

C1621

Back Camera Power Supply Failure

DTC

C1622

Open or Short Circuit in Back Camera Signal

DESCRIPTION

This DTC is stored if the parking assist ECU judges as a result of its self check that the signals or signal lines between the parking assist ECU and the rear television camera assembly are not normal.

DTC Code	DTC Detection Condition	Trouble Area
C1621	Rear television camera power supply failure	Harness or connector Rear television camera assembly Parking assist ECU
C1622	An open or short in the rear television camera signal circuit	Harness or connector Rear television camera assembly Parking assist ECU

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When "System is initializing" is displayed on the navigation receiver assembly after the battery terminal has been disconnected, correct the steering angle neutral point (See page ).
Depending on the parts that are replaced or operations that are performed during vehicle inspection or maintenance, calibration of other systems as well as the parking assist monitor system may be needed (See page ).

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - REAR TELEVISION CAMERA ASSEMBLY)

(a) Disconnect the D164 parking assist ECU connector.

(b) Disconnect the W13 rear television camera assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
D164-38 (CV-) - W13-2 (CV-)	Always	Below 1 Ω
D164-15 (CV+) - W13-3 (CV+)	Always	Below 1 Ω
D164-14 (CB+) - W13-6 (CB+)	Always	Below 1 Ω
D164-37 (CGND) - W13-5 (CGND)	Always	Below 1 Ω
D164-38 (CV-) or W13-2 (CV-) - Body ground	Always	10 kΩ or higher
D164-15 (CV+) or W13-3 (CV+) - Body ground	Always	10 kΩ or higher
D164-14 (CB+) or W13-6 (CB+) - Body ground	Always	10 kΩ or higher
D164-37 (CGND) or W13-5 (CGND) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	INSPECT PARKING ASSIST ECU

(a) Reconnect the parking assist ECU connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
D164-38 (CV-) - Body ground	Always	Below 1 Ω
D164-37 (CGND) - Body ground	Always	Below 1 Ω

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

D164-14 (CB+) - D164-37 (CGND)

Ignition switch ON

Shift lever in R

5.8 to 7.0 V

Text in Illustration

*a	Component with harness connected (Parking Assist ECU)

REPLACE PARKING ASSIST ECU

3.	CHECK REAR TELEVISION CAMERA ASSEMBLY

(a) Reconnect the W13 rear television camera assembly connector.

(b) Reconnect the parking assist ECU connectors.

Text in Illustration

*a	Component with harness connected (Parking Assist ECU)

HINT:

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

OK:

Waveform is as shown in the illustration.

Reference

Item	Content
Terminal No. (Symbol)	D164-15 (CV+) - D164-37 (CGND)
Tool Setting	200 mV/DIV., 50 μsec./DIV.
Condition	Ignition switch ON, shift lever in R

HINT:

The video waveform changes according to the image sent by the rear television camera assembly.

Text in Illustration

*a	Waveform 1 (under normal conditions)
*b	Waveform 2 (camera lens is covered, blacking out the screen)
*c	Synchronized Signal
*d	Video Waveform

REPLACE PARKING ASSIST ECU

REPLACE REAR TELEVISION CAMERA ASSEMBLY