PARK ASSIST / MONITORING: PARKING ASSIST MONITOR SYSTEM: C1691; Back Camera Initialization Incomplete; 2016 - 2017 MY Sienna [12/2015

Last Modified: 04-05-2023	6.11:8.1.0	Doc ID: RM100000000VJ8I
Model Year Start: 2016	Model: Sienna	Prod Date Range: [12/2015 - 11/2017]
Title: PARK ASSIST / MONITORING: PARKING ASSIST MONITOR SYSTEM: C1691; Back Camera Initialization Incomplete; 2016 - 2017 MY Sienna [12/2015 - 11/2017]

DTC

C1691

Back Camera Initialization Incomplete

DESCRIPTION

This DTC is stored when the parking assist ECU judges that the back camera initial setting has not been memorized (rear television camera optical axis adjustment is incomplete).

DTC Code	DTC Detection Condition	Trouble Area
C1691	Back camera initial setting has not been memorized	Rear television camera optical axis adjustment Parking assist ECU

CAUTION / NOTICE / HINT

NOTICE:

When "System is initializing" is displayed on the parking assist ECU after disconnecting the cable from the negative (-) battery terminal, 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.	ADJUST SETTINGS (CAMERA POSITION SETTING)

(a) Perform the following procedure depending on the memory conditions to register the vehicle information into the parking assist ECU.

(1) Refer to rear television camera optical axis adjustment (See page ).

2.	CHECK FOR DTC

(a) Clear the DTCs (See page ).

(b) Check for DTCs (See page ).

OK:

DTC C1691 is not output.

HINT:

If DTC C1691 is output, perform the rear television camera assembly optical axis adjustment again.
If DTC C1691 is still output after performing the rear television camera assembly optical axis adjustment 3 times, replace the parking assist ECU.

END (ADJUST SETTINGS ARE DEFECTIVE)

REPLACE PARKING ASSIST ECU