Inspection Procedure

1. Remove the AM1 fuse from the instrument panel J/B.
2. Remove the AM2 fuse from the engine room J/B.
3. Measure the resistance of the fuses.

   Standard: Below 1 Ω 

1. NG: REPLACE FUSE 
2. OK: GO TO NEXT STEP 

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

   Standard: 

   TESTER CONNECTION AND SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   P6-33 (AM1) - Body ground	10 to 14 V
   P6-12 (AM2) - Body ground	10 to 14 V
   P6-6 (GND2) - Body ground	Below 1 Ω

1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
2. OK: GO TO NEXT STEP 
   Fig 1: Disconnecting P6 ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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. NG: REPLACE RELAY 
2. OK: GO TO NEXT STEP 

1. Remove the ACC relay.
2. Disconnect the P6 ECU connector.
3. Measure the resistance of the wire harness side connectors.

   Standard: 

   TESTER CONNECTION AND SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   A12-1 - P6-11 (ACCD)	Below 1 Ω
   A12-2 - Body ground	Below 1 Ω
   A12-1 - Body ground	10 kΩ or higher

   Fig 2: Disconnecting P6 ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

1. Measure the voltage of the connector.

   Standard: 

   TESTER CONNECTION AND SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   P6-11 (ACCD) - Body ground	Power switch ON (ACC)	10 to 14 V
   P6-11 (ACCD) - Body ground	Power switch OFF	0 V

   Fig 3: Identifying Power Source Control ECU Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPLACE POWER SOURCE CONTROL ECU 
2. OK: GO TO NEXT STEP 

1. After replacing the power source control ECU with a normally functioning ECU, check that the power switch can be set to ON (ACC).
   RESULT REFERENCE
   
   

   Result	Proceed to
   Power switch can be set to ON (ACC)	A
   Power switch cannot be set to ON (ACC) (w/ smart entry system	B
   Power switch cannot be set to ON (ACC) (w/o smart entry system	C

1. B: Go to ENGINE IMMOBILIZER SYSTEM (w/ SMART ENTRY SYSTEM) (See  PRECAUTION  ) 
2. C: Go to ENGINE IMMOBILIZER SYSTEM (w/o SMART ENTRY SYSTEM) (See  PRECAUTION  ) 
3. A: GO TO NEXT STEP 

NORMAL (POWER SOURCE CONTROL ECU DEFECTIVE)