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"C41" FP RELAY CIRCUIT MALFUNCTION
FI
SYSTEM
DIAGNOSIS
4·53
DETECTED CONDITION POSSIBLE CAUSE
No voltage is applied to fuel pump although fuel
• Fuel pump relay circuit open or short.
pump relay is turned ON, or voltage is applied to fuel
• Fuel pump relay malfunction.
pump although fuel pump relay is turned OFF.
• ECM malfunction.
INSPECTION
Step 1
1) Remove the frame cover.
(c::::7"8-6)
2) Turn the ignition switch OFF.
3) Check the FP relay coupler for loose or poor contacts.
4) If OK, then check the insulation and continuity. Refer to page
5-9 for details.
Is the FP relay OK?
• Y
/8
or OIW wire open or shorted to ground, or
poor @ or ® connection.
•
If wire and connection are OK, intermittent trou-
YES
ble or faulty ECM.
•
Recheck each terminal and wire harness for
open circuit and poor connection.
NO Replace the FP relay with a new one.
"C42" IG SWITCH CIRCUIT MALFUNCTION
ECM couplers
DETECTED CONDITION POSSIBLE CAUSE
Ignition switch signal is not input in the ECM.
• Ignition system circuit open or short.
• ECM malfunction.
INSPECTION
*Refer to the IGNITION SWITCH INSPECTION for details. (c::::7"9-32)