5.5 initial diagnostic check: efi - harley-davidson-sweden.se
5.5 initial diagnostic check: efi - harley-davidson-sweden.se
5.5 initial diagnostic check: efi - harley-davidson-sweden.se
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FUEL SYSTEM ELECTRICAL TEST 5.13<br />
GENERAL<br />
With ignition switch turned to IGNITION and the engine stop<br />
switch at RUN, the ECM will energize the system relay to<br />
complete the circuit to the in-tank fuel pump. It will remain on<br />
as long as the engine is cranking or running, and the ECM is<br />
receiving ignition reference pul<strong>se</strong>s from the CKP. If there are<br />
no reference pul<strong>se</strong>s, the ECM will de-energize the system<br />
relay within 2 <strong>se</strong>conds after ignition is ON or engine has<br />
stalled, or immediately after the ignition is shut OFF.<br />
The fuel pump delivers fuel to the injectors. The pressure regulator<br />
is where the system pressure is controlled. Excess fuel<br />
flow is bypas<strong>se</strong>d into the fuel tank through the pressure regulator.<br />
When the engine is stopped, the pump can be turned on<br />
by applying battery voltage and ground to the fuel pump connector<br />
[141A]. The fuel pump connector is located on the canopy<br />
at the top of the fuel tank. Improper fuel system pressure<br />
may contribute to one or all of the following symptoms.<br />
●<br />
Engine cranks, but won’t run.<br />
Fuel Tank<br />
f1924x8x<br />
Fuel Tank Harness<br />
Connector [13]<br />
Not Pre<strong>se</strong>nt on FLHR/C/S<br />
●<br />
●<br />
Engine cuts out (may feel like ignition problems).<br />
Hesitation, loss of power and poor fuel economy.<br />
Figure 5-25. Fuel Pump/Fuel Level Sender Connector<br />
(FLTR, FLHT/C/U)<br />
NOTE<br />
After turning ignition OFF, you must wait 10 <strong>se</strong>conds before<br />
turning the ignition back ON to get the fuel pump to reprime.<br />
This time out period is necessary for the ECM and IAC to<br />
re<strong>se</strong>t.<br />
Spare<br />
EFI System Relay<br />
DIAGNOSTICS<br />
Fuel<br />
Pump<br />
f2223x9x<br />
Diagnostic Notes<br />
ECM Power<br />
The reference numbers below correlate with the circled numbers<br />
on the Test 5.15 flow charts.<br />
1. Turns on fuel pump if wiring is OK. If pump runs, problem<br />
is in basic fuel delivery.<br />
Figure 5-26. EFI Fu<strong>se</strong> Block<br />
2. U<strong>se</strong> HARNESS CONNECTOR TEST KIT (Part No. HD-<br />
41404), brown pin probe and patch cord.<br />
3. Connect BREAKOUT BOX (Part No. HD-43876). See<br />
Section 5.7 BREAKOUT BOX: EFI.<br />
4. U<strong>se</strong> HARNESS CONNECTOR TEST KIT (Part No. HD-<br />
41404), purple pin probe and patch cord.<br />
5-40 2004 Touring: Engine Management (EFI)
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