Inspection Procedure

1. Check that the P position switch is ON.
2. Turn the power switch ON (READY) and check that the hybrid control system starts normally. Make sure the brake pedal is depressed at this time.

   OK: Hybrid control system starts normally (power switch can be set to ON (READY)). 

1. NG: Go to step 2 
2. OK: GO TO NEXT STEP 

   END 

1. Check that the power mode can be changed by pushing the power switch.

HINT:

With power switch OFF, do not depress the brake pedal and push the power switch repeatedly. The power mode should change as follows:

ON (ACC), ON (IG), OFF.

With the power switch OFF, depress the brake pedal and push the power switch repeatedly. The power mode should change as follows:

ON (READY), OFF.

OK: Power switch operates normally. 

1. NG: OTHER PROBLEM (See  PROBLEM SYMPTOMS TABLE   ) 
2. OK: GO TO NEXT STEP 

1. Check for DTCs of the power source control ECU.

   OK: DTCs of the power source control ECU are not output 

1. NG: Go to  DIAGNOSTIC TROUBLE CODE CHART   ) 
2. OK: GO TO NEXT STEP 

1. Connect the hand-held tester (with CAN VIM) to the DLC3.
2. Turn the power switch ON (IG) and push the hand-held tester main switch ON.
3. Read the DATA LIST according to the display on the tester.

   Power source control ECU: 

   Fig 1: Power Source Control ECU - Data List

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: ON (stop lamp switch ON) appears on the screen. 

1. NG: Go to step 5 
2. OK: Go to step   8 . 

1. Measure the voltage when the brake pedal is operated.

   Standard: 

   TESTER CONNECTION AND SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   P6-1 (STP) - Body ground	Brake pedal released	10 to 14 V
   P6-1 (STP) - Body ground	Brake pedal depressed	0 V

   Fig 2: Checking Power Source Control ECU Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: Go to step 6 
2. OK: GO TO NEXT STEP 

   REPLACE POWER SOURCE CONTROL ECU 

1. NG: REPLACE STOP LAMP SWITCH ASSY 
2. OK: GO TO NEXT STEP 

1. Disconnect the S16 switch connector.
2. Disconnect the P6 ECU connector.
3. Measure the resistance and voltage of the wire harness side connectors.

   Standard: 

   TESTER CONNECTION AND SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   S16-1 - P6-1 (STP)	Below 1 Ω
   S16-2 - Body ground	10 to 14 V

   Fig 3: Disconnecting S16 Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
2. OK: GO TO NEXT STEP 

   REPLACE POWER SOURCE CONTROL ECU 

1. Check for DTCs of the hybrid vehicle control ECU.

   OK: DTCs of the hybrid vehicle control ECU are not output 

1. NG: Go to HYBRID CONTROL SYSTEM (See  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
2. OK: GO TO NEXT STEP 

   REPLACE POWER SOURCE CONTROL ECU