Power Source Mode does not Change to ON (ACC) [12/2012 - ]: Procedure

1. Disconnect the G84 connector from the certification ECU (smart key ECU assembly).
2. Disconnect the 3C and 3D connectors from the instrument panel junction block assembly.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G84-4 (ACCD) - 3C-45	Always	Below 1 Ω
   3D-9 - Body ground
   G84-4 (ACCD) or 3C-45 - Body ground		10 kΩ or higher

   Result	Proceed to
   	OK
   	NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

1. Remove the instrument panel junction block assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (Instrument Panel Junction Block Assembly)

   -

   -

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3A-1 - 3D-51	Battery voltage not applied to terminals 3C-45 and 3D-9	10 kΩ or higher
   	Battery voltage applied to terminals 3C-45 and 3D-9	Below 1 Ω

   Result	Proceed to
   	OK
   	NG

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) 

Result: 

OK 

See step  3

1. Reconnect the G84 certification ECU (smart key ECU assembly) connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   G84-4 (ACCD) - Body ground	Engine switch off → Engine switch on (ACC)	1 V or less → 8.5 V or higher

   Result	Proceed to
   	OK
   	NG

Result: 

OK 

CHECK RELAY CONTACT SIDE CIRCUIT: 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2012 - 11/2013] .

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2013 - 10/2015] .

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - 08/2016] .

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - 08/2017] .

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - ] .

Result: 

NG 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY): 

Refer to REMOVAL [12/2012 - 10/2015] .

Refer to REMOVAL [10/2015 - ] .