Power Source Mode does not Change to ON (ACC): Procedure

1. Remove the AM2 fuse from the cowl side J/B RH.
2. Measure the resistance of the fuse.

   Standard resistance

   Below 1 Ω

NG → REPLACE FUSE 

OK: Go to next step 

1. Check that the connectors are securely connected and the terminals are not deformed or loose.

   OK

   The connectors are securely connected and the terminals are not deformed or loose.

NG → REPAIR OR REPLACE CONNECTORS 

OK: Go to next step 

1. Disconnect the ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection (Symbols)	Condition	Specified Condition
   J55-33 (AM1) - Body ground	Always	10 to 14 V
   J55-12 (AM2) - Body ground	Always	10 to 14 V

3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection (Symbols)	Condition	Specified Condition
   J55-6 (GND2) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the cowl side J/B RH connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   RD-2 - RA-5 or RD-7	Always	68 to 250 Ω at 20°C (68°F)
   RM-1 - RD-27	When battery voltage is applied to terminals RD-2 and RA-5 or RD-7	Below 1 Ω
   RM-1 - RJ-16	When battery voltage is applied to terminals RD-2 and RA-5 or RD-7	Below 1 Ω

NG → See step   7 

OK: Go to next step 

1. Measure the resistance of the wire harness side connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection (Symbols)	Condition	Specified Condition
   J55-11 (ACCD) - RD-2	Always	Below 1 Ω
   J55-11 (ACCD) - Body ground	Always	10 kΩ or higher
   RA-5 - Body ground	Always	Below 1 Ω
   RD-7 - Body ground	Always	Below 1 Ω

2. Measure the voltage of the wire harness side connector.

   Standard voltage

   Tester Connection	Condition	Specified Condition
   RM-1 - Body ground	Always	10 to 14 V

NG → See step   8 

OK: Go to next step 

1. Reconnect the connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the voltage of the wire harness side connector.

   Standard voltage

   Tester Connection (Symbols)	Condition	Specified Condition
   J55-11 (ACCD) - Body ground	Engine switch off	Below 1 V
   	Engine switch on (ACC)	8 to 14 V

NG → REPLACE POWER SOURCE CONTROL ECU 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (COWL SIDE J/B - EACH SYSTEM) 

1. Replace a faulty relay or J/B and then connect the power source control ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection (Symbols)	Condition	Specified Condition
   J55-11 (ACCD) - Body ground	Engine switch off	Below 1 V
   	Engine switch on (ACC)	8 to 14 V

NG → REPLACE POWER SOURCE CONTROL ECU 

OK → END 

1. Repair or replace a faulty wire harness or connector and then connect the power source control ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection (Symbols)	Condition	Specified Condition
   J55-11 (ACCD) - Body ground	Engine switch off	Below 1 V
   	Engine switch on (ACC)	8 to 14 V

NG → REPLACE POWER SOURCE CONTROL ECU 

OK → END