Ecd System Ecm Power Source Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT INTEGRATION RELAY (INTEGRATION RELAY - BODY GROUND)

INSPECT INTEGRATION RELAY (EFI MAIN RELAY)

CHECK WIRE HARNESS (+B AND MREL CIRCUIT)

CHECK WIRE HARNESS (ECM - BODY GROUND)

INSPECT ECM (IGSW VOLTAGE)

INSPECT FUSE (IGN, G2)

INSPECT IG2 RELAY

CHECK WIRE HARNESS (ECM - ENGINE ROOM NO. 1 RELAY BLOCK)

CHECK WIRE HARNESS (MAIN BODY ECU - ENGINE ROOM NO. 1 RELAY BLOCK)

CHECK WIRE HARNESS (IGNITION SWITCH - ENGINE ROOM NO. 1 RELAY BLOCK)

INSPECT IGNITION SWITCH ASSEMBLY

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

ПРИМЕЧАНИЕ:

After replacing the ECM, the new ECM needs registration (see page RAV4_ACA30 RM000000TJ4007X.html) and initialization (see page RAV4_ACA30 RM000000TIN007X.html).

1. Remove the integration relay from the engine room No. 1 relay block.
   

2. Measure the voltage of the terminal of the integration relay and body ground.
   

   Standard voltage:

   Tester Connection	Specified Condition
   1C-1 - Body ground	9 to 14 V

3. Reinstall the integration relay.
   

1. Remove the integration relay from the engine room No. 1 relay block.
   

2. Inspect the EFI MAIN fuse.
   

   
   
   

   1. Remove the EFI MAIN fuse from the integration relay.
      

   2. Measure the EFI MAIN fuse resistance.
      

      Standard resistance:

      Below 1 Ω
      

   3. Reinstall the EFI MAIN fuse.
      

3. Inspect the EFI MAIN relay.
   

   1. Measure the EFI MAIN relay resistance.
      

      Standard resistance:

      Tester Connection	Specified Condition
      1C-1 - 1A-4	10 kΩ or higher
      1C-1 - 1A-4	Below 1 Ω (Apply battery voltage to terminals 1A-2 and 1A-3)

4. Reinstall the integration relay.
   

1. Check the wire harness between the ECM and integration relay.
   

   1. Disconnect the A12 ECM connector.
      

   2. Remove the integration relay from the engine room No. 1 relay block.
      

   3. Measure the resistance of the wire harness side connectors.
      

      Standard resistance:

      Tester Connection	Specified Condition
      A12-45 (MREL) - 1A-2	Below 1 Ω
      A12-1 (+B) - 1A-4	Below 1 Ω
      A12-45 (MREL) or 1A-2 - Body ground	10 kΩ or higher
      A12-1 (+B) or 1A-4 - Body ground	10 kΩ or higher

2. Check the wire harness between the integration relay and body ground.
   

   1. Measure the resistance of the wire harness side connector and body ground.
      

      Standard resistance:

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

3. Reconnect the ECM connector.
   

4. Reinstall the integration relay.
   

1. Disconnect the B32 ECM connector.
   

2. Measure the resistance of the wire harness side connector.
   

   Standard resistance:

   Tester Connection	Specified Condition
   B32-109 (E1) - Body ground	Below 1 Ω

3. Reconnect the ECM connector.
   

1. Disconnect the A12 and B32 ECM connectors.
   

2. Turn the ignition switch on (IG).
   

3. Measure the voltage of the terminals of the A12 and B32 ECM connectors.
   

   Standard voltage:

   Tester Connection	Specified Condition
   A12-25 (IGSW) - B32-109 (E1)	9 to 14 V

4. Reconnect the ECM connectors.
   

1. Remove the IGN fuse from the main body ECU (instrument panel junction block).
   

2. Remove the IG2 fuse from the engine room No. 1 relay block.
   

3. Measure the resistance of the fuses.
   

   Standard resistance:

   Below 1 Ω
   

4. Reinstall the IGN fuse.
   

5. Reinstall the IG2 fuse.
   

1. Remove the IG2 relay from the engine room No. 1 relay block.
   

2. Check the resistance.
   

   Standard resistance:

   Tester Connection	Specified Condition
   3 - 5	10 kΩ or higher
   3 - 5	Below 1 Ω (When battery voltage applied to terminals 1 and 2)

3. Reinstall the relay.
   

1. Disconnect the A12 ECM connector.
   

2. Remove the IG2 relay from the engine room No. 1 relay block.
   

3. Measure the resistance of the wire harness side connectors.
   

   Standard resistance:

   Tester Connection	Specified Condition
   A12-25 (IGSW) - Relay block IG2 relay terminal 5	Below 1 Ω
   A12-25 (IGSW) or Relay block IG2 relay terminal 5 - Body ground	10 KΩ or higher

4. Reconnect the ECM connector.
   

5. Reinstall the IG2 relay.
   

   Result:

   Result	Proceed to
   Out of normal range	A
   Within normal range (w/ Entry and Start System)	B
   Within normal range (w/o Entry and Start System)	C

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

2. Remove the IG2 relay from the engine room No. 1 relay block.
   

3. Measure the resistance of the wire harness side connectors.
   

   Standard resistance:

   Tester Connection	Specified Condition
   E19-5 (IG2D) - Relay block IG2 relay terminal 1	Below 1 Ω
   Relay block IG2 relay terminal 2 - Body ground	Below 1 Ω
   E19-5 (IG2D) - Body ground	10 kΩ or higher

4. Reconnect the main body ECU.
   

5. Reinstall the IG2 relay.
   

1. Disconnect the E5 ignition switch connector.
   

2. Remove the IG2 relay from the engine room No. 1 relay block.
   

3. Measure the resistance of the wire harness side connectors.
   

   Standard resistance:

   Tester Connection	Specified Condition
   E5-6 (IG2) - Relay block IG2 relay terminal 1	Below 1 Ω
   Relay block IG2 relay terminal 2 - Body ground	Below 1 Ω
   E5-6 (IG2) - Body ground	10 kΩ or higher

4. Reconnect the ignition switch connector.
   

5. Reinstall the IG2 relay.
   

1. Disconnect the E5 ignition switch connector.
   

2. Measure the resistance of the terminals shown below.
   

   Standard resistance:

   Condition	Tester Condition	Specified Condition
   OFF	Between all terminals	1 MΩ or more
   ACC	2 - 3	1 Ω or less
   ON	2 - 4, 6 - 7	1 Ω or less
   START	1 - 2, 2 - 4, 6 - 7, 7 - 8	1 Ω or less

3. Reconnect the ignition switch connector.