Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

1. CHECK ECM (FPR VOLTAGE) 
   Fig 1: Identifying ECM Connector Terminals

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
   1. Measure the voltage of the ECM connector.

      Standard voltage 

      VOLTAGE SPECIFICATION
      
      

      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

   OK: REPLACE ECM 

   NG: Go to next step 

2. INSPECT FUEL PMP RELAY ASSEMBLY 
   Fig 2: Identifying FUEL PMP Relay Terminals

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
   1. Remove the FUEL PMP relay from the engine room R/B.
   2. Measure the resistance of the FUEL PMP relay.

      Standard resistance 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Specified Condition
      1 - 2, 3 - 4	Below 1 Ω
      3 - 5	10 kΩ or higher
      3 - 4	10 kΩ or higher (when battery voltage is applied to terminals 1 and 2)
      3 - 5	Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

   3. Reinstall the FUEL PMP relay.

   NG: REPLACE FUEL PMP RELAY ASSEMBLY 

   OK: Go to next step 

3. CHECK HARNESS AND CONNECTOR (FUEL PMP RELAY - ECM) 
   1. Remove the FUEL PMP relay from the engine room R/B.
   Fig 3: Identifying E7 ECM Connector Terminals
   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
   2. Disconnect the E7 ECM connector.
   3. Measure the resistance between wire harness side connectors.

      Standard resistance (Check for open) 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Specified Condition
      Engine Room R/B (FUEL PMP relay terminal 1) - FPR (E7-30)	Below 1 Ω

      Standard resistance (Check for short) 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Specified Condition
      Engine Room R/B (FUEL PIMP relay terminal 1) or FPR (E7-30) - Body ground	10 kΩ or higher

   4. Reconnect the ECM connector.
   5. Reinstall the FUEL PMP relay.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE ECM