Inspection Procedure

HINT:

When C1249/49 is output together with C1380/64, inspect and repair the Trouble Areas indicated by C1249/49 first.

1. INSPECT STOP SW FUSE 
   1. Remove the STOP SW fuse from main body ECU RH.
   2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE REFERENCE CHART
      
      

      Tester Connection	Condition	Specified Condition
      STOP SW (7.5 A) fuse	Always	Below 1 Ω

   Fig 1: Inspecting Stop SW Fuse
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE STOP SW FUSE 

   OK: Go to Next Step 

2. CHECK STOP LIGHT OPERATION 
   1. Install STOP SW fuse.
   2. Check that the stop light comes on when the brake pedal is depressed, and goes off when the brake pedal is released.

      OK 

      CONDITION REFERENCE CHART
      
      

      Condition	Illumination Condition
      Brake pedal depressed	ON
      Brake pedal released	OFF

   NG: INSPECT STOP LIGHT CIRCUIT 

   OK: Go to Next Step 

3. INSPECT SKID CONTROL ECU (STP1 TERMINAL) 
   1. Disconnect the skid control ECU connector.
   2. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      STANDARD VOLTAGE REFERENCE CHART
      
      

      Tester Connection	Condition	Specified Condition
      J77-10 (STP1) - Body ground	Stop light switch ON (Brake pedal depressed)	8 to 14 V
      J77-10 (STP1) - Body ground	Stop light switch OFF (Brake pedal repressed)	Below 1.5 V

   Fig 2: Inspecting Skid Control ECU (STP1 Terminal)
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (STP1 CIRCUIT) 

   OK: Go to Next Step 

4. INSPECT SKID CONTROL ECU (STP2 TERMINAL) 
   1. Disconnect the skid control ECU connector.
   2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE REFERENCE CHART
      
      

      Tester Connection	Condition	Specified Condition
      J77-10 (STP1) - A35-20 (STP2)	Always	Below 1 Ω

   Fig 3: Inspecting Skid Control ECU (STP2 Terminal)
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (STP2 CIRCUIT) 

   OK: Go to Next Step 

5. PERFORM ACTIVE TEST BY TECHSTREAM (STOP LIGHT CONTROL RELAY) 
   1. Reconnect the skid control ECU connectors.
   2. Connect Techstream to the DLC3.
   3. Start the engine.
   4. Select the Active Test mode on Techstream.

      ABS/VSC/TRAC: 

      ACTIVE TEST REFERENCE CHART
      
      

      Item (Display)	Vehicle Condition / Test Details	Diagnostic Note
      Stop lamp relay	Turns stop light control relay ON / OFF	Stop light comes on (Does not come on for 5 seconds or more)

   5. Check that the "ON" and "OFF" of the stop light can be shown on the rear combination light by Techstream.

      OK: 

      The stop light turns on or off in accordance with Techstream. 

   OK:  Go to step  9

   NG: Go to Next Step 

6. INSPECT STOP LIGHT CONTROL RELAY 
   1. Turn the engine switch off.
   2. Remove the stop light control relay.
   3. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE REFERENCE CHART
      
      

      Tester Connection	Condition	Specified Condition
      3 - 4	Always	Below 1 Ω
      3 - 5	Always	10 kΩ or higher
      3 - 4	When battery positive voltage is applied to terminal 1 and battery negative voltage to terminal 2	10 kΩ or higher
      3 - 5	When battery positive voltage is applied to terminal 1 and battery negative voltage to terminal 2	Below 1 Ω

      Fig 4: Inspecting Stop Light Control Relay

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE STOP LIGHT CONTROL RELAY 

   OK: Go to Next Step 

7. INSPECT STOP LIGHT CONTROL RELAY (POWER SOURCE TERMINAL) 
   1. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      STANDARD VOLTAGE REFERENCE CHART
      
      

      Tester Connection	Condition	Specified Condition
      Stop light control relay terminal 5 - Body ground	Always	8 to 14 V
      Stop light control relay terminal 2 - Body ground	Engine switch on (IG)	8 to 14 V

   Fig 5: Inspecting Stop Light Control Relay (Power Source Terminal)
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   OK: Go to Next Step 

8. INSPECT SKID CONTROL ECU (STPO TERMINAL) 
   1. Turn the engine switch off.
   2. Install the stop light control relay.
   3. Disconnect the skid control ECU connector.
   4. Turn the engine switch on (IG).
   5. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      STANDARD VOLTAGE REFERENCE CHART
      
      

      Tester Connection	Condition	Specified Condition
      A35-21 (STPO) - Body ground	Engine switch on (IG)	10 to 14 V

      Fig 6: Inspecting Skid Control ECU (STPO Terminal)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   OK: Go to Next Step 

9. RECONFIRM DTC 
   1. Turn the engine switch off.
   2. Reconnect the skid control ECU connector.
   3. Clear the DTC (See DTC CHECK/CLEAR  ).
   4. Check if the same DTC is recorded (See DTC CHECK/CLEAR  ).

      Result 

      RESULT REFERENCE CHART
      
      

      Condition	Proceed to
      DTC (C1380/64) is not output	A
      DTC (C1380/64) is output	B

   B: REPLACE SKID CONTROL ECU 

   A: USE SIMULATION METHOD TO CHECK