DTC B1372: Wiper Switch Signal Mismatch between LIN and Line [12/2017 - 10/2023]: Procedure

1. Clear the DTC.

   Refer to DTC CHECK / CLEAR [12/2017 - 10/2023]

   Body Electrical > Wiper > Clear DTCs 

2. Turn the engine switch on (IG) and wait for at least 10 seconds.
3. Check for DTC.

   Refer to DTC CHECK / CLEAR [12/2017 - 10/2023]

   Body Electrical > Wiper > Trouble Codes 

   OK

   DTC B1372 is not output

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 09/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 10/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 11/2021]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - 10/2022]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 10/2023] 

Result: 

NG 

See step  2

1. Read the Data List according to the display on the Techstream.

   Refer to DATA LIST / ACTIVE TEST [12/2017 - 10/2020] , or refer to DATA LIST / ACTIVE TEST [10/2020 - 10/2023]

   Body Electrical > Wiper > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Wiper Switch HI (Line)	Windshield wiper switch assembly HI signal (abnormal control system) input condition	OFF or ON	OFF: Windshield wiper switch assembly not in HI position ON: Windshield wiper switch assembly in HI position	-

   Chassis > Steering Angle Sensor > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Wiper Hi Switch	Windshield wiper switch assembly (HI position) condition	OFF or ON	OFF: Windshield wiper switch assembly not in HI position ON: Windshield wiper switch assembly in HI position	-

   Body Electrical > Wiper > Data List 

   Tester Display
   Wiper Switch HI (Line)

   Chassis > Steering Angle Sensor > Data List 

   Tester Display
   Wiper Hi Switch

   Result

   Result	Proceed to
   Only "Wiper Switch HI (Line)" changes normally	A
   Only "Wiper Hi Switch" changes normally	B

Result: 

A 

REPLACE STEERING SENSOR. Refer to  REMOVAL [12/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

Result: 

B 

See step  3

1. Disconnect the A43 windshield wiper motor assembly connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A43-3 (2S) - Body ground	Engine switch on (IG), HI operating	Below 1 V
   	Windshield wiper motor assembly stopped	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE WINDSHIELD WIPER MOTOR ASSEMBLY. Refer to  REMOVAL [12/2017 - 10/2020]  , or refer to  REMOVAL [10/2020 - ] 

Result: 

NG 

See step  4

1. Disconnect the G29*1 or G30*2 steering sensor connector.
   1. *1: w/ VGRS System
   2. *2: w/o VGRS System
2. Disconnect the A43 windshield wiper motor assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   W/ VGRS SYSTEM
   
   

   Tester Connection	Condition	Specified Condition
   G29-2 (2S) - A43-3 (2S)	Always	Below 1 Ω
   G29-2 (2S) or A43-3 (2S) - Body ground	Always	10 kΩ or higher

   W/O VGRS SYSTEM
   
   

   Tester Connection	Condition	Specified Condition
   G30-2 (2S) - A43-3 (2S)	Always	Below 1 Ω
   G30-2 (2S) or A43-3 (2S) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE STEERING SENSOR. Refer to  REMOVAL [12/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR