DTC P0230: Fuel Pump Primary Circuit: Procedure

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

   HINT: 

   If there is fuel pressure, you will hear the sound of fuel flowing.

NG → See step   6 

OK: Go to next step 

1. Measure the voltage according to the value(s) in the table below.
   Fig 1: Identifying ECM Connectors E6 And A5

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A5-6 (FPR) - E6-1 (E1)	STA signal ON (Cranking)	11 to 14 V
   A5-6 (FPR) - E6-1 (E1)	STA signal OFF (Engine switch on (IG))	0 to 3 V

NG → See step   3 

OK → See step   5 

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

3. Reinstall the F/PMP relay.

NG → REPLACE F/PMP RELAY 

OK: Go to next step 

1. Remove the F/PMP relay from the engine room No. 2 relay block.
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 (2) - A5-6 (FPR)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   F/PMP relay (2) or A5-6 (FPR) - Body Ground	Always	10 kΩ or higher

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (F/PMP RELAY - ECM) 

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