Inspection Procedure

HINT:

Read freeze frame data using the 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 

   STANDARD VOLTAGE SPECIFICATION
   
   

   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 3 V

   Fig 1: Identifying Terminal E1 And FPR Of ECM Connector

   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 

   STANDARD RESISTANCE SPECIFICATION
   
   

   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) 

      STANDARD RESISTANCE SPECIFICATION
      
      

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

      Standard resistance (Check for short) 

   STANDARD RESISTANCE SPECIFICATION
   
   

   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 And ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE ECM  (See REMOVAL )