Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJAU
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 11/2017]
Title: PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: C1AB1; Short to +B in Outer Mirror Indicator(Slave); 2016 - 2017 MY Sienna [12/2015 - 11/2017]

DTC

C1AB1

Short to +B in Outer Mirror Indicator(Slave)

DESCRIPTION

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

DTC No.

DTC Detection Condition

Trouble Area

C1AB1

Both of the following conditions are met:

  • Blind spot monitor main switch (warning canceling switch assembly) is on.
  • The blind spot monitor sensor is not sending voltage to the indicator but the indicator receives voltage 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 main switch (warning canceling switch assembly) is on.

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs (See page 2016 - 2017 MY Sienna [12/2015 - 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

(See page 2016 MY Sienna [12/2015 - 08/2016]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2017 MY Sienna [08/2016 - 11/2017]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING )
NG

2.

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

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

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

q3-4 (OMIL) - Body ground

Ignition switch ON

Below 1 V

Text in Illustration

*a

Front view of wire harness connector

(to Blind Spot Monitor Sensor LH)
OK

REPLACE BLIND SPOT MONITOR SENSOR LH

NG

3.

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

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

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

q3-4 (OMIL) - Body ground

Ignition switch ON

Below 1 V

Text in Illustration

*a

Front view of wire harness connector

(to Blind Spot Monitor Sensor LH)
OK

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

NG

4.

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

(a) Disconnect the H5*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) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

q3-4 (OMIL) - Body ground

Ignition switch ON

Below 1 V

Text in Illustration

*a

Front view of wire harness connector

(to Blind Spot Monitor Sensor LH)
OK

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR