DTC P0230: Fuel Pump Primary Circuit: Procedure

1. Measure the voltage according to the value(s) in the table below.
   Fig 1: Identifying ECM Connectors (E4) (A5)

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   Standard voltage

   Tester Connection	Condition	Specified Condition
   FPR (A5-15) - E1 (E4-7)	STA signal ON	9 to 14 V
   FPR (A5-15) - E1 (E4-7)	STA signal OFF	0 to 3 V

NG → See step   4 

OK: Go to next step 

1. Remove the F/PMP relay from the engine room R/B No. 2.
   Fig 2: Identifying Relay Test Terminals

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

   Standard resistance

   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)

3. Reinstall the F/PMP relay.

NG → REPLACE RELAY 

OK: Go to next step 

1. Remove the F/PMP relay from the engine room R/B No. 2.
2. Disconnect the A5 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Specified Condition
   F/PMP relay terminal 2 - FPR (A5-15)	Below 1 Ω
   F/PMP relay terminal 2 or FPR (A5-15) - Body Ground	10 kΩ or higher

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   5