Power Source Circuit [03/2014 - ]: Procedure

1. Disconnect the seat belt control ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Display	Condition	Specified Condition
   F57-8 (PGND) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Seat Belt Control ECU)

3. Reconnect the seat belt control ECU connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (PGND CIRCUIT) 

OK: Go to next step 

1. Disconnect the seat belt control ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Turn the engine switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Display	Condition	Specified Condition
   F56-8 (IG1) - F57-8 (PGND)	Engine switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Seat Belt Control ECU)
   *2	Front view of wire harness connector (to Seat Belt Control ECU)

4. Reconnect the seat belt control ECU connector.

NG → See step   4 

OK: Go to next step 

1. Disconnect the seat belt 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 Display	Condition	Specified Condition
   F57-7 (+B) - Body ground	Always	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Seat Belt Control ECU)

3. Reconnect the seat belt control ECU connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (+B CIRCUIT) 

OK → See step   8 

1. Remove the instrument panel junction block assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *1

   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
   2K-1 - 2D-30	Always	10 kΩ or higher
   2K-1 - 2D-30	When battery voltage applied to terminals 2A-20 and 2A-3	Below 1 Ω

3. Reinstall the instrument panel junction block assembly.

NG → REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

OK: Go to next step 

1. Disconnect the instrument panel junction block assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the seat belt control ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2D-30 - F56-8 (IG1)	Always	Below 1 Ω
   2D-30 - Body ground	Always	10 kΩ or higher
   F56-8 (IG1) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Seat Belt Control ECU)
   *2	Front view of wire harness connector (to Instrument Panel Junction Block Assembly)

4. Reconnect the seat belt control ECU connector.
5. Reconnect the instrument panel junction block assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - SEAT BELT CONTROL ECU) 

OK: Go to next step 

1. Disconnect the instrument panel junction block assembly connector.

   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
   2A-3 - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Instrument Panel Junction Block Assembly)

3. Reconnect the instrument panel junction block assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BODY GROUND) 

OK: Go to next step 

1. Disconnect the instrument panel junction block assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the power management control ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2A-20 - F8-20 (IG1D)	Always	Below 1 Ω
   2A-20 - Body ground	Always	10 kΩ or higher
   F8-20 (IG1D) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Power Management Control ECU)
   *2	Front view of wire harness connector (to Instrument Panel Junction Block Assembly)

4. Reconnect the power management control ECU connector.
5. Reconnect the instrument panel junction block assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - POWER MANAGEMENT CONTROL ECU) 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BATTERY)