Inspection procedure

Hand–held tester: 1 Perform active test by hand–held tester(operation of circuit opening relay)

1. 1
   Connect the hand–held tester to the dlc3.
2. 2
   turn the ignition switch on and push the hand–held tester main switch on.
3. 3
   select the item ”diagnosis / enhanced obd ii / active test / fuel pump / spd”.
4. 4
   check the relay operation while operating it with the hand–held tester.

Standard: operating noise can be heard from the relay.

2 Inspect ecm power source circuit

3 Inspect circuit opening relay

1. 1
   Remove the circuit opening relay from the instrument panel j/b.
2. 2
   check for continuity in the circuit opening relay.

Standard:

3. Reinstall the circuit opening relay.

4 Inspect ecm(fc voltage)

1. 1
   Turn the ignition switch on.
2. 2
   measure the voltage between the terminals of the e3 and e6 ecm connectors.

Standard:

5 Check harness and connector(efi relay – circuit opening relay)

1. 1
   Remove the efi relay from the engine room r/b.
2. 2
   remove the circuit opening relay from the instrument panel j/b.
3. 3
   check the resistance between the wire harness side connectors.

Standard (check for open):

Standard (check for short):

1. 1
   Reinstall the circuit opening relay.
2. 2
   reinstall the efi relay.

   

   

Replace ecm 6 Inspect fuel pump

7 Check harness and connector(circuit opening relay – fuel pump, fuel pump – body ground)

1. 1
   Remove the circuit opening relay from the instrument panel j/b.
2. 2
   disconnect the f10 fuel pump connector.
3. 3
   check the resistance between the wire harness side connectors.

Standard (check for open):

Standard (check for short):

1. 1
   Reconnect the fuel pump connector.
2. 2
   reinstall the circuit opening relay.

   

   

Replace ecm Obd ii scan tool (excluding hand–held tester): 1 Check operation of fuel pump

1. 1
   Turn the ignition switch on.
2. 2
   connect between terminals fc and e01 of the ecm connector.
3. 3
   check for fuel pressure in the fuel inlet hose when it is pinched off.

   Result: there is pressure in fuel inlet hose.

Hint

: at this time, you will hear the fuel flowing sound.

2 Inspect ecm power source circuit

3 Inspect circuit opening relay

1. 1
   Remove the circuit opening relay from the instrument panel j/b.
2. 2
   check for continuity in the circuit opening relay.

Standard:

3. Reinstall the circuit opening relay.

4 Inspect ecm(fc voltage)

1. 1
   Turn the ignition switch on.
2. 2
   measure the voltage between the terminals of the e3 and e6 ecm connectors.

Standard:

5 Check harness and connector(efi relay – circuit opening relay)

1. 1
   Remove the efi relay from the engine room r/b.
2. 2
   remove the circuit opening relay from the instrument panel j/b.
3. 3
   check the resistance between the wire harness side connectors.

Standard (check for open):

Standard (check for short):

1. 1
   Reinstall the circuit opening relay.
2. 2
   reinstall the efi relay.

   

   

Replace ecm 6 Inspect fuel pump

7 Check harness and connector(circuit opening relay – fuel pump,fuel pump – body ground)

1. 1
   Remove the circuit opening relay from the instrument panel j/b.
2. 2
   disconnect the f10 fuel pump connector.
3. 3
   check the resistance between the wire harness side connectors.

Standard (check for open):

Standard (check for short):

1. 1
   Reconnect the fuel pump connector.
2. 2
   reinstall the circuit opening relay.

   

   

Replace ecm