Inspection Procedure

1. Connect Techstream to the DLC3.
2. Turn the ignition switch to the ON position and turn the tester on.
3. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.
4. Check whether operating sounds can be heard while operating the relay using the tester.

   OK: 

   Operating sounds can be heard from relay. 

OK:  Go to step  7

NG: Go to next step 

1. Inspect the ECM power source circuit (See ECM POWER SOURCE CIRCUIT  ).

NG: REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT 

OK: Go to next step 

1. Remove the C/OPN relay from the instrument panel J/B.
2. Check the C/OPN relay resistance.

   Standard resistance 

   RESISTANCE SPECIFIED CONDITION
   
   

   Tester Connections	Specified Conditions
   3 - 5	10 kΩ or higher
   3 - 5	Below 1 Ω (when battery voltage applied to terminals 1 and 2)

   Fig 1: Identifying Circuit Opening Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Reinstall the circuit opening relay.

NG: REPLACE CIRCUIT OPENING RELAY 

OK: Go to next step 

1. Turn the ignition switch to the ON position.
2. Measure the voltage between the terminals of the E3 and E6 ECM connectors.

   Standard voltage 

   VOLTAGE SPECIFIED CONDITION
   
   

   Tester Connections	Specified Conditions
   FC (E6-10) - E1 (E3-5)	Between 9 V and 14 V

   Fig 2: Inspecting ECM (FC Voltage)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE ECM 

NG: Go to next step 

1. Disconnect the 110 ignition switch connector.
Fig 3: Identifying 110 Ignition Switch Connector And C/OPN Relay
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the C/OPN relay from the instrument panel J/B.
3. Check the resistance.

   Standard resistance (Check for open) 

   RESISTANCE SPECIFIED CONDITION - CHECK FOR OPEN
   
   

   Tester Connections	Specified Conditions
   IG2 (110-6) - Instrument panel J/B (Circuit opening relay terminal 1)	Below 1 Ω

   Standard resistance (Check for short) 

   RESISTANCE SPECIFIED CONDITION - CHECK FOR SHORT
   
   

   Tester Connections	Specified Conditions
   IG2 (110-6) or Instrument panel J/B (Circuit opening relay terminal 1) - Body ground	10 kΩ or higher

4. Reinstall the C/OPN relay.
5. Reconnect the ignition switch connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the E6 ECM connector.
Fig 4: Identifying E6 ECM Connector And C/OPN Relay
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the C/OPN relay from the instrument panel J/B.
3. Check the resistance.

   Standard resistance (Check for open) 

   RESISTANCE SPECIFIED CONDITION - CHECK FOR OPEN
   
   

   Tester Connections	Specified Conditions
   FC (E6-10) - Instrument panel J/B (Circuit opening relay terminal 2)	Below 1 Ω

   Standard resistance (Check for short) 

   RESISTANCE SPECIFIED CONDITION - CHECK FOR SHORT
   
   

   Tester Connections	Specified Conditions
   FC (E6-10) or Instrument panel J/B (Circuit opening relay terminal 2) - Body ground	10 kΩ or higher

4. Reinstall the C/OPN relay.
5. Reconnect the ECM connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE ECM 

1. Inspect the fuel pump (See INSPECTION ).

NG: REPLACE FUEL PUMP 

OK: Go to next step 

1. Remove the C/OPN relay from the instrument panel J/B.
2. Disconnect the F10 fuel pump connector.
Fig 5: Checking Harness And Connector (Circuit Opening Relay - Fuel Pump, Fuel Pump - Body Ground)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the resistance.

   Standard resistance (Check for open) 

   RESISTANCE SPECIFIED CONDITION - CHECK FOR OPEN
   
   

   Tester Connections	Specified Conditions
   Instrument panel J/B (Circuit opening relay terminal 3) - Fuel pump (F10-4)	Below 1 Ω
   Fuel pump (F10-5) - Body ground	Below 1 Ω

   Standard resistance (Check for short) 

   RESISTANCE SPECIFIED CONDITION - CHECK FOR SHORT
   
   

   Tester Connections	Specified Conditions
   Instrument panel J/B (Circuit opening relay terminal 3) or Fuel pump (F10-4) - Body ground	10 kΩ or higher

4. Reconnect the fuel pump connector.
5. Reinstall the C/OPN relay.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: CHECK AND REPAIR HARNESS AND CONNECTOR (EFI RELAY - CIRCUIT OPENING RELAY)