Inspection Procedure

1. Connect the intelligent tester to the DLC3.
2. Turn the power switch ON (IG) and turn the intelligent tester ON.
3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PMP SP CTL.
4. Check the operation of the relay while operating it using the intelligent tester.

   OK: 

   Operating noise can be heard from the relay. 

OK: CHECK FOR INTERMITTENT PROBLEMS 

NG: GO TO Next Step 

1. Remove the F/PMP relay from the engine room No. 1 relay block.
2. Measure the resistance of the F/PMP relay.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

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

   Fig 1: Inspecting F/PMP Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RELAY 

OK: GO TO Next Step 

1. Remove the F/PMP relay from the engine room No. 1 relay block.
2. Disconnect the A53 ECM connector.
3. Measure the resistance.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   F/PMP relay (2) - FPR (A53-6)	Below 1 Ω
   F/PMP relay (2) or FPR (A53-6) - Body ground	10 kΩ or higher

   Fig 2: Identifying F/PMP Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE ECM