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

NG → GO TO  DIAGNOSTIC TROUBLE CODE CHART 

OK: Go to next step 

1. Disconnect the C43 power source control ECU connector.
   Fig 1: Checking Battery - Power Source Control ECU

   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
   C43-1 (AM22) - Body ground	Always	9.5 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to Power Source Control ECU)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE 

OK: Go to next step 

1. Remove the integration relay.
2. Inspect the integration relay. Refer to ON-VEHICLE INSPECTION .

NG → REPLACE INTEGRATION RELAY 

OK: Go to next step 

1. Disconnect the 2C and 2D instrument panel junction block assembly connectors.
   Fig 2: Inspecting Instrument Panel Junction Block Assembly (IG1 NO. 1, IG1 NO. 2 And IG1 NO. 3 Relays)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *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
   2C-26 - 2D-9	20°C (68°F)	181.82 to 272.73 Ω

NG → REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

OK: Go to next step 

1. Disconnect the C43 power source control ECU connector.
2. Disconnect the 2C instrument panel junction block assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C43-20 (IG1D) - 2C-26	Always	Below 1 Ω
   C43-20 (IG1D) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the 2D instrument panel junction block assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2D-9 - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the C42 power source control ECU connector.
2. Disconnect the 1A integration relay connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C42-8 (IG2D) - 1A-2	Always	Below 1 Ω
   C42-8 (IG2D) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the 1A integration relay connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1A-3 - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

NG → See step   11 

OK → See step   10