Inspection Procedure

1. Remove the STOP SW fuse from the main body ECU RH.
2. Check the STOP SW fuse.

   Standard resistance: 

   Below 1 Ω 

NG: REPLACE FUSE (STOP SW FUSE) 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch ON (IG).
3. Select the Data List mode on the Techstream.

   ABS/VSC/TRAC: 

   TESTER DISPLAY REFERENCE CHART
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Stop Lamp SW	Stop light switch / ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released	-

4. Check that the stop light observed on the Techstream changes when the brake pedal is depressed.

   OK: 

   When the brake pedal is depressed, the Techstream displays "ON". 

OK:  Go to step  8

NG: Go to next step 

1. Disconnect the A13 ECU connector.
2. Disconnect the A35 switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   A13-45 (STP) - A35-1	Below 1 Ω
   A13-45 (STP) - Body ground	2 kΩ or lower

Fig 1: Identifying A13 ECU And A35 Switch Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the A35 switch connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   STANDARD VOLTAGE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   A35-2 - Body ground	10 to 14 V

Fig 2: Identifying A35 Switch Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

OK: Go to next step 

1. Disconnect the stop light switch connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   1-2	Switch pin free	Below 1 Ω
   1-2	Switch pin pushed in	10 kΩ or higher

Fig 3: Inspecting Stop Light Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE STOP LIGHT SWITCH 

OK: Go to next step 

1. Disconnect the A13 and A15 ECU connectors.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   A13-1 (GND) - Body ground	Below 1 Ω
   A15-1 (GND4) - Body ground	Below 1 Ω

Fig 4: Identifying A13 And A15 ECU Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) 

OK: Go to next step 

1. Clear the DTC (see DTC CHECK/CLEAR  ).
2. Turn the power switch ON (READY).
3. Depress the brake pedal several times to test the stop light circuit.
4. Check if the same DTC is recorded (see DTC CHECK/CLEAR  ).

   HINT:

   Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.

   Result 

   RESULT REFERENCE
   
   

   Condition	Proceed to
   DTC (C1249/49) is not output	A
   DTC (C1249/49) is output	B

   HINT:

   If troubleshooting has been carried out according to the "PROBLEM SYMPTOMS TABLE", refer back to the table and proceed to the next step (see PROBLEM SYMPTOMS TABLE  ).

B: REPLACE SKID CONTROL ECU  (See REMOVAL  )

A: END 

1. Disconnect the A13 ECU connector.
2. Disconnect the LC ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   A13-4S (STP) - LC-32 (STPI)	Below 1 Ω
   A13-45 (STP) - Body ground	2 kΩ or lower

Fig 5: Identifying A13 ECU And LC ECU Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: CHECK LIGHTING SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )