Smart Key System (For Start Function) Power Source Mode Does Not Change

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK SMART KEY SYSTEM

INSPECT ACC RELAY

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ACC RELAY)

INSPECT FUSE (ACC-B FUSE)

CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - ACC RELAY)

INSPECT IG1 RELAY

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - INSTRUMENT PANEL JUNCTION BLOCK)

CHECK HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BODY GROUND)

INSPECT FUSE (IG2 FUSE)

CHECK HARNESS AND CONNECTOR (BATTERY - ENGINE ROOM RELAY BLOCK)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ENGINE ROOM RELAY BLOCK)

CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - BODY GROUND)

INSPECT ENGINE ROOM RELAY BLOCK (IG2 RELAY)

CHECK HARNESS AND CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK)

CHECK HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BODY GROUND)

CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BODY GROUND)

DESCRIPTION

HINT:

To allow use of the Techstream to inspect the push-button start function when the engine switch is off, repeat opening and closing any of the doors. Opening and closing a door establishes communication between the Techstream and the main body ECU (instrument panel junction block). (Opening and closing a door can also be simulated by operating a door courtesy light switch.)

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Remove the battery of the electrical key transmitter (COROLLA_ZRE142 RM000001P7R02YX_01_0001.html).
   

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

1. Remove the ACC relay from the relay block No. 8.
   

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

1. Disconnect the E50 connector from the main body ECU (instrument panel junction block).
   

   
   
   
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E50-4 (ACCD) - Relay block No. 8 ACC relay terminal 1	Always	Below 1 Ω
   E50-4 (ACCD) or Relay block No. 8 ACC relay terminal 1 - Body ground	Always	10 kΩ or higher

1. Remove the ACC-B fuse from the main body ECU (instrument panel junction block).
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   ACC-B fuse	Always	Below 1 Ω

1. Disconnect the 2M connector from the main body ECU (instrument panel junction block)
   

   
   
   
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   2M-9 - Relay block No. 8 ACC relay terminal 3	Always	Below 1 Ω
   2M-9 or Relay block No. 8 ACC relay terminal 3 - Body ground	Always	10 k Ω or higher

1. Remove the IG1 relay from the main body ECU (instrument panel junction block).
   

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

1. Disconnect the E51 and 2F connectors from the main body ECU (Instrument panel junction block).
   

   
   
   
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E51-6 (IG1D) - 2F-3	Always	Below 1 Ω
   E51-6 (IG1D) or 2F-3 - Body ground	Always	10 kΩ or higher

1. Disconnect the 2E connector from main body ECU (Instrument panel junction block).
   

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   2E-17 - Body ground	Always	Below 1 Ω

1. Remove the IG2 fuse from engine room relay block.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   IG2 fuse	Always	Below 1 Ω

1. Disconnect the 1E connector from engine room relay block.
   

   
   
   
   

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   1E-1 - Body ground	Always	11 to 14 V

1. Disconnect the E51 connector from the main body ECU (instrument panel junction block).
   

   
   
   
   

2. Disconnect the 1A connector from engine room relay block.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E51-5 (IG2D) - 1A-2	Always	Below 1 Ω
   E51-5 (IG2D) or 1A-2 - Body ground	Always	10 kΩ or higher

1. 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

1. Remove the engine room relay block.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   1E-1 - 1A-4	When battery voltage is not applied to terminals 1A-2 and 1A-3	10 kΩ or higher
   1E-1 - 1A-4	When battery voltage is applied to terminals 1A-2 and 1A-3	Below 1 Ω

1. Disconnect the 2G connector from main body ECU (Instrument panel junction block).
   

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   2G-1 - Body ground	Always	11 to 14 V

1. Disconnect the 2E connector from main body ECU (instrument panel junction block).
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   2E-17 - Body ground	Always	Below 1 Ω

1. Disconnect the E50 and E51 connectors from the main body ECU (Instrument panel junction block).
   

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   E50-6 (AM2) - Body ground	Always	11 to 14 V
   E51-1 (AM1) - Body ground	Always	11 to 14 V

1. Disconnect the E51 connector from main body ECU (Instrument panel junction block).
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E51-4 (GND2) - Body ground	Always	Below 1 Ω