Inspection Procedure

HINT:

Read freeze frame data using the hand-held tester or the OBD II scan tool. 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, as well as other data from the time when a malfunction occurred.

1. Check voltage between terminal FPR and E1 of ECM. 

   CHECK: 

   Measure the voltage between terminals of E8 and E10 ECM connectors.

   Fig 1: Checking Voltage Between Terminal FPR And E1 Of ECM

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: 

   Fig 2: Voltage Reference Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK: Replace ECM (See  ENGINE CONTROL MODULE (ECM)  ). 
   2. NG: Go to next step 
2. Check fuel pump relay. 

   PREPARATION: 

   Remove the fuel pump relay from the engine room R/B.

   CHECK: 

   Inspect the fuel pump relay.

   Fig 3: Checking Fuel Pump Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: 

   Fig 4: Tester Connection Reference Chart

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   1. NG: Replace fuel pump relay. 
   2. OK: Go to next step 
3. Check for open and short in harness and connector between fuel pump relay and ECM. 

   PREPARATION: 

   1. Remove the fuel pump relay from the engine room J/B.
   Fig 5: Removing Fuel Pump Relay From Engine Room J/B
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Disconnect the E8 ECM connector.
   Fig 6: Disconnecting E8 ECM Connector
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   CHECK: 

   Measure the resistance between wire harness side connectors.

   OK: 

   Fig 7: Resistance Reference Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: Repair or replace harness or connector. 
   2. OK: Replace ECM (See  ENGINE CONTROL MODULE (ECM)  ).