DTC P0230: Fuel Pump Primary Circuit: Procedure

1. Check if there is pressure in the fuel inlet hose.

   HINT: 

   There is fuel pressure if you will hear the sound of fuel flowing.

NG → See step   5 

OK: Go to next step 

1. Measure the voltage according to the value(s) in the table below.
   Fig 1: Check ECM (FPR Voltage)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A5-15 (FPR) - E4-7 (E1)	Cranking	11 to 14 V
   A5-15 (FPR) - E4-7 (E1)	Engine switch on (IG)	0 to 3 V

   TEXT IN ILLUSTRATION
   
   

   *1	Component with harness connected (ECM)

NG → See step   3 

OK → See step   6 

1. Remove the F/PMP relay from the engine room relay block No. 2.
   Fig 2: Inspecting Fuel Pump Relay (F/PMP)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - 4	No battery voltage applied across terminals 1 and 2	Below 1 Ω
   3 - 4	Battery voltage applied across terminals 1 and 2	10 kΩ or more

3. Reinstall the F/PMP relay.

NG → REPLACE RELAY (F/PMP RELAY) 

OK: Go to next step 

1. Remove the F/PMP relay from the engine room relay block No. 2.
   Fig 3: Identifying (F/PMP Relay - ECM) Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   F/PMP relay terminal 2 - A5-15 (FPR)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   F/PMP relay terminal 2 or A5-15 (FPR) - Body Ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1

   Engine Room Relay Block No. 2

   *2

   Front view of wire harness connector (to ECM)

4. Reinstall the F/PMP relay.
5. Reconnect the ECM connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (F/PMP RELAY - C/OPN RELAY)