Inspection Procedure

Hand-held tester: 

1. PERFORM ACTIVE TEST USING HAND-HELD TESTER (OPERATION OF CIRCUIT OPENING RELAY) 
   1. Connect a hand-held tester to the DLC3.
   2. Turn the ignition switch to ON and turn the tester ON.
   3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP/ SPD.
   4. Check whether operating sounds can be heard while operating the relay using the tester.

   OK: Operating sounds can be heard from relay. 

   1. OK: Go to step   7  .
   2. NG: Go to next step. 
2. INSPECT ECM POWER SOURCE CIRCUIT (See  ECM POWER SOURCE CIRCUIT  ) 
   1. NG: REPAIR OR REPLACE POWER SOURCE CIRCUIT 
   2. OK: Go to next step. 
3. INSPECT CIRCUIT OPENING RELAY 
   1. Remove the circuit opening relay from the instrument panel J/B.
   2. Check the circuit opening relay resistance.

      Standard: 

      CIRCUIT OPENING RELAY
      
      

      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: Inspecting Circuit Opening Relay

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Reinstall the circuit opening relay.
   1. NG: REPLACE CIRCUIT OPENING RELAY 
   2. OK: Go to next step. 
4. INSPECT ECM (FC VOLTAGE) 
   1. Turn the ignition switch to ON.
   2. Measure the voltage between the terminals of the E3 and E5 ECM connectors.

      Standard: 

      ECM (FC VOLTAGE)
      
      

      Tester Connections	Specified Conditions
      FC (E3-10) - E01 (E5-7)	Between 9 V and 14 V

      Fig 2: Inspecting ECM (FC Voltage)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK: REPLACE ECM (See  REPLACEMENT  ) 
   2. NG: Go to next step 
5. CHECK HARNESS AND CONNECTOR (EFI RELAY - CIRCUIT OPENING RELAY) 
   1. Remove the EFI relay from the engine room R/B.
   2. Remove the circuit opening relay from the instrument panel J/B.
   3. Check the resistance.

      Standard (Check for open): 

      EFI RELAY - CIRCUIT OPENING RELAY (CHECK FOR OPEN)
      
      

      Tester Connections	Specified Conditions
      EFI relay (3) - Circuit opening relay (1)	Below 1 Ω
      EFI relay (3) - Circuit opening relay (5)	Below 1 Ω

      Standard (Check for short): 

      EFI RELAY - CIRCUIT OPENING RELAY (CHECK FOR SHORT)
      
      

      Tester Connections	Specified Conditions
      EFI relay (3) or Circuit opening relay (1) - Body ground	10 kΩ or higher
      EFI relay (3) or Circuit opening relay (5) - Body ground	10 kΩ or higher

      Fig 3: Checking Harness And Connector (EFI Relay - Circuit Opening Relay) (1 Of 2)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002