(a) Remove the F/PMP relay from the engine room relay block.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
Standard Resistance (Check for Short):
Text in Illustration
(d) Reconnect the ECM connector.
(e) Reinstall the F/PMP relay.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (F/PMP RELAY - ECM)
OK -- REPLACE ECM See: Powertrain Management/Computers and Control Systems/Engine Control Module/Service and
Repair/Removal
From 08/2009
2GR-FE ENGINE CONTROL: SFI SYSTEM: P0230: Fuel Pump Primary Circuit
P0230 - Fuel Pump Primary Circuit
DESCRIPTION
- This DTC is designed to detect a malfunction in the F/PMP relay circuit. When the system is normal, battery voltage is applied to the FPR
terminal of the ECM while the F/PMP relay is off. If battery voltage is not applied to the FPR terminal while the F/PMP relay is off, the ECM
interprets this as a malfunction. The ECM then illuminates the MIL and sets a DTC.
- The F/PMP relay switches the fuel pump speed according to the engine conditions. The fuel pump operates when the ECM receives the STA
signal and NE signal. The F/PMP relay is turned on while the engine is idling or operating at low load. This causes current to flow through the
fuel pump resistor to the fuel pump. The fuel pump then operates at low speed. The F/PMP relay is turned off while the engine is cranking or
operating at high load. The fuel pump then operates at normal speed.
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