4-44 FI SYSTEM DIAGNOSIS
“C41” FP RELAY CIRCUIT MALFUNCTION
INSPECTION
Step 1
1) Remove the seat. ("7-4)
2) Turn the ignition switch OFF.
3) Check the FP relay coupler for loose or poor contacts.
If OK, then check the insulation and continuity. Refer to page
5-10 for details.
Is the FP relay OK?
NOTE:
When the both fuel injectors break down at a time, “C41” is indi-
cated.
“C42” IG SWITCH CIRCUIT MALFUNCTION
INSPECTION
*Refer to the IGNITION SWITCH INSPECTION for details. ("8-39)
DETECTED CONDITION POSSIBLE CAUSE
No voltage is applied to the both injectors for 3 sec.
after the contact of fuel pump relay is turned ON.
Or voltage is applied to the both injectors, when the
contact of fuel pump is OFF.
• Fuel pump relay circuit open or short.
• Fuel pump relay malfunction.
• ECM malfunction.
1
YES
• Y/B or O/G (O/W: For E-03, 24, 28 and 33) wire
open or shorted to ground, or poor
V or
9 con-
nection.
• If wire and connection are OK, intermittent trou-
ble or faulty ECM.
• Recheck each terminal and wire harness for
open circuit and poor connection.
• Inspect the fuel injectors. ("4-42)
NO Replace the FP relay with a new one.
DETECTED CONDITION POSSIBLE CAUSE
Ignition switch signal is not input in the ECM. • Ignition system circuit open or short.
• ECM malfunction.
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