8505488-8505486-8505500-8505502-8505504-8505484-8505492

Component Location

General Description

Vain pump type fuel pump which is driven by electric motor is applied to this vehicle. Fuel pump which is installed inside of fuel tank supplies fuel to high pressure pump. ECM controls Fuel pump relay to supply power to low pressure fuel pump. The relay operates for approx. 2 sec. for the diagnosis fuel pump relay at IG key ON, then if engine speed above 45rpm is detected by CKPS, relay turns ON and fuel is supplied to high pressure pump.

DTC Description

P0232 is set when excessive current is detected in fuel pump relay control circuit for more than 1 sec. at fuel pump relay ON condition. This code is due to short to battery in fuel pump relay control circuit.

DTC Detecting Condition

Item	Detecting Condition			Possible Cause
DTC Strategy	• Voltage monitoring			• Fuel pump relay control circuit • Fuel pump relay component
Enable Conditions	• IG key ON (monitoring only performed within relay operating condition)
Threshold Value	• Short to battery in fuel relay control circuit.
Diagnostic Time	• 1.0 sec.
Fail Safe	Fuel cut	NO	• -
	EGR Off	NO
	Fuel Limit	YES
	Check Lamp	OFF

Specification

Relay Coil Resistance

75 ~ 85Ω(20℃)

Diagnostic Circuit Diagram

note

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Signal Waveform & Data

Fig.1) Fuel pump relay signal waveform and IG key signal. (IG key ON→cranking→IG key OFF).

☞ IG key ON : Fuel pump relay ON approx. 68ms after IG key ON.

☞ Engine OFF : Fuel pump relay ON for approx. 14.5 sec. after IG key OFF.