DTC C1AB3: Short to GND in Outer Mirror Indicator (Slave) [12/2019 - 11/2023]: Procedure

1. Turn the ignition switch off.
2. Turn the ignition switch to ON.
3. Recheck for DTCs and check if the same DTC is output again.

   Body Electrical > Blind Spot Monitor Slave > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Result	Proceed to
   OK	A
   NG (w/ Seat Position Memory System)	B
   NG (w/o Seat Position Memory System)	C

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

Result: 

C 

See step  6

Result: 

B 

See step  2

1. Disconnect the M2 blind spot monitor sensor RH (slave) connector.
2. Disconnect the J7 outer mirror control ECU assembly RH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   M2-4 (OMIR) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Outer Mirror Control ECU Assembly RH)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J7-13 (BDSR) - J7-7 (GND)	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY RH. Refer to  REMOVAL [12/2019 - ] 

Result: 

OK 

See step  4

1. Remove the outer mirror RH.

   Refer to REMOVAL [12/2019 - ]

2. Inspect the outer rear view mirror indicator RH on the outer mirror RH.

   Refer to INSPECTION [12/2019 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE OUTER MIRROR RH. Refer to  REMOVAL [12/2019 - ] 

Result: 

OK 

See step  5

1. Remove the outer rear view mirror assembly RH.

   Refer to REMOVAL [12/2019 - 11/2023]

2. Inspect the outer rear view mirror assembly RH.

   Refer to INSPECTION [12/2019 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE BLIND SPOT MONITOR SENSOR RH (SLAVE). Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

Result: 

NG 

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH. Refer to  REMOVAL [12/2019 - 11/2023] 

1. Disconnect the M2 blind spot monitor sensor RH (slave) connector.
2. Disconnect the J15 outer rear view mirror assembly RH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   M2-4 (OMIR) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  7

1. Remove the outer mirror RH.

   Refer to REMOVAL [12/2019 - ]

2. Inspect the outer rear view mirror indicator RH on the outer mirror RH.

   Refer to INSPECTION [12/2019 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE OUTER MIRROR RH. Refer to  REMOVAL [12/2019 - ] 

Result: 

OK 

See step  8

1. Remove the outer rear view mirror assembly RH.

   Refer to REMOVAL [12/2019 - 11/2023]

2. Inspect the outer rear view mirror assembly RH.

   Refer to INSPECTION [12/2019 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE BLIND SPOT MONITOR SENSOR RH (SLAVE). Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

Result: 

NG 

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH. Refer to  REMOVAL [12/2019 - 11/2023]