Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000001980Z
Model Year Start: 2018 Model: Sienna Prod Date Range: [11/2017 -           ]
Title: PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: C1AB3; Short to GND in Outer Mirror Indicator(Slave); 2018 - 2020 MY Sienna [11/2017 -        ]

DTC

C1AB3

Short to GND in Outer Mirror Indicator(Slave)

DESCRIPTION

This DTC is stored when the blind spot monitor sensor LH detects a ground short in the outer rear view mirror indicator LH.

DTC No.

DTC Detection Condition

Trouble Area

C1AB3

Both of the following conditions are met:

  • Blind spot monitor system is on.
  • The current that is sent from the blind spot monitor sensor to the indicator is above a specified level for a specified period of time.
  • Outer rear view mirror LH
  • Outer rear view mirror assembly LH
  • Harness or connector
  • Blind spot monitor sensor LH

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is on.

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs (See page 2018 - 2020 MY Sienna [11/2017 -        ]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: DTC CHECK / CLEAR ).

(b) Recheck for DTCs and check if the same DTC is output again.

OK:

No DTCs are output.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - OUTER REAR VIEW MIRROR ASSEMBLY LH)

(a) Disconnect the q3 blind spot monitor sensor LH connector.

(b) Disconnect the H17*1 or H13*2 outer rear view mirror assembly LH connector.

  • *1: w/ Seat Position Memory System
  • *2: w/o Seat Position Memory System

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

Standard Resistance:

w/ Seat Position Memory System

Tester Connection

Condition

Specified Condition

q3-4 (OMIL) or H17-6 (BSL+) - Body ground

Always

10 kΩ or higher

w/o Seat Position Memory System

Tester Connection

Condition

Specified Condition

q3-4 (OMIL) or H13-6 (BSL+) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH

(a) Disconnect the H17*1 or H13*2 outer rear view mirror assembly LH connector.

  • *1: w/ Seat Position Memory System
  • *2: w/o Seat Position Memory System

(b) Disconnect the IND2 outer rear view mirror LH (outer rear view mirror indicator LH) connector.

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

Standard Resistance:

w/ Seat Position Memory System

Tester Connection

Condition

Specified Condition

H17-6 (BSL+) - Body ground

Always

10 kΩ or higher

w/o Seat Position Memory System

Tester Connection

Condition

Specified Condition

H13-6 (BSL+) - Body ground

Always

10 kΩ or higher
NG

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

OK

4.

REPLACE OUTER REAR VIEW MIRROR LH (OUTER REAR VIEW MIRROR INDICATOR LH)

(a) Replace the outer rear view mirror LH (outer rear view mirror indicator LH) (See page 2018 - 2020 MY Sienna [11/2017 -        ]; MIRROR (EXT): OUTER REAR VIEW MIRROR: REMOVAL ).

NEXT

5.

CHECK DTC

(a) Clear the DTCs (See page 2018 - 2020 MY Sienna [11/2017 -        ]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: DTC CHECK / CLEAR ).

(b) Recheck for DTCs and check if the same DTC is output again.

OK:

No DTCs are output.

OK

END (OUTER REAR VIEW MIRROR LH (OUTER REAR VIEW MIRROR INDICATOR LH) WAS DEFECTIVE)
NG

REPLACE BLIND SPOT MONITOR SENSOR LH