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 And A5

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

   Tester Connection	Condition	Specified Condition
   A5-15 (FPR) - E4-7 (E1)	STA signal ON (Cranking)	11 to 14 V
   A5-15 (FPR) - E4-7 (E1)	STA signal OFF (Idling with warm engine)	0 to 3 V

NG → See step   2 

OK → See step   4 

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

   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 (F/PMP 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 - A5-15 (FPR)	Below 1 Ω
   F/PMP relay terminal 2 or A5-15 (FPR) - 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 → REPAIR OR REPLACE HARNESS OR CONNECTOR (F/PMP RELAY - C/OPN RELAY)