Power Source Mode does not Change to ON (IG) [12/2013 - ]: Procedure

1. Disconnect the A39 connector from the power management control ECU.
2. Disconnect the 2D and 2E connectors from the No. 1 integration relay.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A39-2 (IG2D) - 2D-3	Always	Below 1 Ω
   2D-2 - Body ground	Always	Below 1 Ω
   A39-2 (IG2D) or 2D-3 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the No. 1 integration relay. Refer to REMOVAL [12/2013 - ] .
2. Inspect the No. 1 integration relay. Refer to INSTALLATION [12/2013 - ] .

NG → See step   8 

OK: Go to next step 

1. Disconnect the G58 connector from the power management control ECU.
2. Disconnect the 3A and 3B 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
   G58-2 (IG1D) - 3A-29	Always	Below 1 Ω
   3B-8 - Body ground	Always	Below 1 Ω
   G58-2 (IG1D) and 3A-29 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the instrument panel junction block assembly. Refer to REMOVAL [12/2013 - ] .
2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Refer to REMOVAL [12/2013 - ] .
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a

   Component without harness connected (Instrument Panel Junction Block Assembly)

   -

   -

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3E-1 - 3A-54 (IG1 No. 1 relay) 3E-1 - 3A-9 (IG1 No. 2 relay) 3E-1 - 3A-3 (IG1 No. 3 relay)	Auxiliary battery voltage not applied to terminals 3A-29 and 3B-8	10 kΩ or higher
   	Auxiliary battery voltage applied to terminals 3A-29 and 3B-8	Below 1 Ω

NG → See step   6 

OK: Go to next step 

1. Reconnect the A39 and G58 power management control ECU connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A39-2 (IG2D) - Body ground	Power switch on (ACC) → Power switch on (IG)	1 V or less → 9 V or higher
   G58-2 (IG1D) - Body ground	Power switch on (ACC) → Power switch on (IG)	1 V or less → 9 V or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Power Management Control ECU)

NG → See step   7 

OK → CHECK RELAY CONTACT SIDE CIRCUIT