Power Source Mode does not Change: Procedure

1. Remove the battery of the electrical key transmitter. Refer to REMOVAL .
   Fig 1: Identifying Key Distance

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2. Touch the logo side mark of the key or card key to the engine witch.
3. Check that the engine switch can be turned on (IG).

   Result

   Result	Proceed to
   Power source mode does not change to on (ACC)	A
   Power source mode does not change to on (IG)	B
   Power source mode does not change to on (IG and ACC)	C
   Power source mode is turned on	D

B → See step   4 

C → See step   10 

D → See step   12 

A: Go to next step 

1. Remove the ACC relay from the instrument panel junction block.
   Fig 2: Measuring Resistance Of ACC Relay

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

   Standard resistance

   Tester Connection	Condition	Specified condition
   3 - 5	When battery voltage is not applied to terminals 1 and 2	10 kΩ or higher
   3 - 5	When battery voltage is applied to terminals 1 and 2	Below 1 Ω

NG → REPLACE ACC RELAY 

OK: Go to next step 

1. Disconnect the D8 connector from the main body ECU (instrument panel junction block).
   Fig 3: Checking Harness And Connector (Main Body ECU - Instrument Panel Junction Block)

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

   Standard resistance

   Tester Connection	Condition	Specified condition
   D8-22 (ACCD) - 1I-3	Always	Below 1 Ω
   D8-22 (ACCD) or 1I-3 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) 

1. Remove the IG1 relay from the instrument panel junction block.
   Fig 4: Measuring Resistance Of IG1 Relay

   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
   3 - 5	When battery voltage is not applied to terminals 1 and 2	10 kΩ or higher
   3 - 5	When battery voltage is applied to terminal 1 and 2	Below 1 Ω

NG → REPLACE IG1 RELAY 

OK: Go to next step 

1. Disconnect the D8 connector from the main body ECU (instrument panel junction block).
   Fig 5: Checking Harness And Connector (Instrument Panel Junction Block - Main Body ECU)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the 1I connector from the instrument panel junction block.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester connection	Condition	Specified condition
   D8-3 (IG1D) - 1I-9	Always	Below 1 Ω
   D8-3 (IG1D) or 1I-9 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the IG2 relay from the engine room relay block.
   Fig 6: Measuring Resistance Of IG2 Relay

   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
   3 - 5	When battery voltage is not applied to terminals 1 and 2	10 kΩ or higher
   3 - 5	When battery voltage is applied to terminal 1 and 2	Below 1 Ω

NG → REPLACE IG2 RELAY 

OK: Go to next step 

1. Disconnect the D7 connector from the main body ECU (instrument panel junction block).
   Fig 7: Checking Harness And Connector (Main Body ECU - IG2 Relay)

   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
   D7-11 (IG2D) - Engine room relay block IG2 relay terminal 1	Always	Below 1 Ω
   D7-11 (IG2D) or Engine room relay block IG2 relay terminal 1 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the voltage according to the value(s) in the table below.
   Fig 8: Checking Harness And Connector (Battery - IG2 Relay)

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   Standard voltage

   Tester connection	Condition	Specified condition
   Engine room relay block IG2 relay terminal 5 - Body ground	Always	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR, OR REPLACE IG2 FUSE 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 9: Checking Harness And Connector (Body Ground - IG2 Relay)

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   Standard resistance

   Tester connection	Condition	Specified condition
   Engine room relay block IG2 relay terminal 2 - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) 

1. Disconnect the 1A connector from the instrument panel junction block.
   Fig 10: Checking Harness And Connector (Battery - Instrument Panel Junction Block)

   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
   1A-1 - Body ground	Always	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR, OR REPLACE ALT FUSE 

OK: Go to next step 

1. Disconnect the 1F connector from the instrument panel junction block.
   Fig 11: Checking Harness And Connector (Instrument Panel Junction Block - Body Ground)

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

   Standard resistance

   Tester connection	Condition	Specified condition
   1F-10 - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR