DTC P0230 Fuel Pump Primary Circuit: Wiring Diagram

WARNING: This page is about a different car, the 2006 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Fuel Pump Primary Circuit - Wiring Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

This troubleshooting procedure is based on the premise that the engine is started. If the engine is not started, proceed to the PROBLEM SYMPTOMS TABLE .

CHECK ECM (FRP VOLTAGE)

Measure the voltage according to the value(s) in the table below.

Standard voltage

Fig 2: Identifying ECM Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TESTER CONNECTION SPECIFIED CONDITION

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 : REPLACE ECM

OK : GO TO NEXT STEP

INSPECT RELAY (Marking: F/PMP)

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

Measure the resistance according to the value(s) in the table below.

Standard resistance

Fig 3: Identifying Relay Test Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TESTER CONNECTION SPECIFIED CONDITION

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)

NG : REPLACE RELAY

OK : GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (F/PMP RELAY - ECM)

Remove the F/PMP relay from the engine room J/B and R/B No. 2.
Disconnect the A5 ECM connector.

Measure the resistance according to the value(s) in the table below.

Standard resistance

Fig 4: Identifying A5 ECM Connector

TESTER CONNECTION SPECIFIED CONDITION

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

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : REPLACE ECM