Main Switch Circuit [08/2013 - ]: Procedure

1. Check that the blind spot monitor indicator on the blind spot monitor main switch (warning canceling switch assembly) illuminates normally when the blind spot monitor main switch (warning canceling switch assembly) is turned from off to on.
2. Check that the blind spot monitor indicator on the blind spot monitor main switch (warning canceling switch assembly) is turn off normally when the blind spot monitor main switch (warning canceling switch assembly) is turned from on to off.

   OK

   The blind spot monitor indicator operates normally.

NG → See step   2 

OK → See step   8 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Blind spot monitor Master / Data List.
5. According to the display on the Techstream, read the Data List.
   BLIND SPOT MONITOR MASTER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Main Switch	Blind spot monitor main switch (warning canceling switch assembly) / OFF or ON	ON: Blind spot monitor main switch (warning canceling switch assembly) on OFF: Blind spot monitor main switch (warning canceling switch assembly) off	-

   Result

   Result	Proceed to
   The display does not change as shown above when the blind spot monitor main switch (warning canceling switch assembly) is operated.	A
   The display changes as shown above when the blind spot monitor main switch (warning canceling switch assembly) is operated.	B

B → See step   6 

A: Go to next step 

1. Remove the blind spot monitor main switch (warning canceling switch assembly). Refer to REMOVAL [08/2013 - ] .
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 (B) - 4 (D)	Blind spot monitor main switch is on (not protruding)	Below 1 Ω
   1 (B) - 4 (D)	Blind spot monitor main switch is off (protruding)	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Blind Spot Monitor Main Switch (Warning Canceling Switch Assembly))

NG → See step   9 

OK: Go to next step 

1. Disconnect the H6 blind spot monitor main switch (warning canceling switch assembly) connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   H6-1 (B) - Body ground	Power switch on (IG)	11 to 14 V
   H6-1 (B) - Body ground	Power switch off	Below 1 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the U8 blind spot monitor sensor LH connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U8-8 (BSSW) - H6-4 (D)	Always	Below 1 Ω
   U8-8 (BSSW) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   10 

1. Remove the blind spot monitor main switch (warning canceling switch assembly). Refer to REMOVAL [08/2013 - ] .
2. Apply auxiliary battery voltage to the blind spot monitor main switch (warning canceling switch assembly) connector and check the operation of the blind spot monitor indicator, as shown in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK

   Connection	Condition	Specified Condition
   Auxiliary battery positive (+) → Terminal 1 (B) Auxiliary battery negative (-) → Terminal 5 (E)	Blind spot monitor main switch is on (not protruding)	Blind spot monitor indicator illuminates
   Auxiliary battery positive (+) → Terminal 1 (B) Auxiliary battery negative (-) → Terminal 5 (E)	Blind spot monitor main switch is off (protruding)	Blind spot monitor indicator not illuminate

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Blind Spot Monitor Main Switch (Warning Canceling Switch Assembly))

NG → See step   9 

OK: Go to next step 

1. Disconnect the U8 blind spot monitor sensor LH connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U8-3 (BIND) - H6-5 (E)	Always	Below 1 Ω
   U8-3 (BIND) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   10