Inspection Procedure

HINT:

Read freeze frame data using the Intelligent tester or Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, 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. CHECK ECM (FRP VOLTAGE) 
   1. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      ECM (FRP VOLTAGE)
      
      

      Tester Connection	Condition	Specified Condition
      A14-6 (FPR) - E3-1 (E1)	STA signal ON	9 to 14 V
      A14-6 (FPR) - E3-1 (E1)	STA signal OFF	0 to 3V

      Fig 1: Identifying ECM (FRP Voltage)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE ECM (See  REMOVAL  ) 

   OK: GO TO NEXT STEP 

2. INSPECT FUEL PUMP RELAY (F/PMP) 
   1. Remove the F/PMP relay from the engine room No. 2 relay block.
   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      FUEL PUMP RELAY (F/PMP)
      
      

      Tester Connection	Condition	Specified Condition
      3-4	When no battery applied to terminals 1 and 2	Below 1 Ω
      3-4	When battery voltage is applied to terminals 1 and 2	10 kΩ or more

      Fig 2: Inspecting Fuel Pump Relay (F/PMP)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE FUEL PUMP RELAY (F/PMP) (See  FUEL PUMP RELAY  ) 

   OK: GO TO NEXT STEP 

3. CHECK HARNESS AND CONNECTOR (F/PMP RELAY - ECM) 
   1. Remove the F/PMP relay from the engine room No. 2 relay block.
   2. Disconnect the A14 ECM connector.
   3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open) 

      F/PMP RELAY - ECM (CHECK FOR OPEN)
      
      

      Tester Connection	Condition	Specified Condition
      F/PMP relay (2)-A14-6 (FPR)	Always	Below 1 Ω

      Standard resistance (Check for short) 

      F/PMP RELAY - ECM (CHECK FOR SHORT)
      
      

      Tester Connection	Condition	Specified Condition
      F/PMP relay (2) or A14-6 (FPR) - Body Ground	Always	10 kΩ or higher

      Fig 3: Identifying F/PMP Relay From Engine Room No. 2 Relay Block

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE ECM (See  REMOVAL  )