Inspection Procedure

HINT:

Read freeze frame data using the hand-held tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. INSPECT ECM (FPR VOLTAGE) 
   1. Measure the voltage between the terminals of the E7 ECM connectors.

      Standard: 

      ECM (FPR VOLTAGE)
      
      

      Tester Connection	Condition	Specified Condition
      FPR (E7-30) - E1 (E7-1)	STA signal ON	9 to 14 V
      FPR (E7-30) - E1 (E7-1)	STA signal OFF	0 to 3 V

      Fig 1: Inspecting ECM (FPR Voltage)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: REPLACE ECM (See  REPLACEMENT  ) 

   NG: Go to next step. 

2. INSPECT FUEL PUMP RELAY ASSY 
   1. Remove the fuel pump relay from the engine room R/B.
   2. Check for continuity in the fuel pump relay.

      Standard: 

      FUEL PUMP RELAY ASSY
      
      

      Tester Connection	Specified Condition
      1 - 2 3 - 4	Continuity
      3 - 5	No continuity
      3 - 5	Continuity (Apply battery voltage to terminals 1 and 2)

      Fig 2: Inspecting Fuel Pump Relay Assy

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Reinstall the fuel pump relay.

   NG: REPLACE FUEL PUMP RELAY ASSY 

   OK: Go to next step. 

3. CHECK HARNESS AND CONNECTOR (FUEL PUMP RELAY - ECM) 
   1. Remove the fuel pump relay from the engine room R/B.
   2. Disconnect the E7 ECM connector.
   3. Check the resistance between the wire harness side connectors.

      Standard (Check for open): 

      FUEL PUMP RELAY - ECM (CHECK FOR OPEN)
      
      

      Tester Connection	Specified Condition
      Engine room R/B (Fuel pump relay terminal 1) - FPR (E7-30)	Below 1 Ω

      Standard (Check for short): 

      FUEL PUMP RELAY - ECM (CHECK FOR SHORT)
      
      

      Tester Connection	Specified Condition
      Engine room R/B (Fuel pump relay terminal 1) or FPR (E7-30) - Body ground	10 kΩ or higher

      Fig 3: Checking Harness And Connector (Fuel Pump Relay - ECM)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 4: Identifying Fuel Pump Relay

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Reinstall the fuel pump relay.
   5. Reconnect the ECM connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE ECM (SEE  REPLACEMENT  )