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FUEL SYSTEM (DFI) 3-73
ECU
•
Check the ECU power source voltage with a digital meter
[A].
○
Position the terminal in accordance w ith terminal numbers
of ECU connectors [B] in this chapter figure.
Battery [C]
ECU Power Source Inspection
Meter between Terminal 13 (W/Y) and
Connections: Battery (–) Terminal
between Terminal 43 (W/BK) and
Battery (–) Terminal
Ignition switch
OFF:
Terminal 13 (W/Y) : 0 V,
Terminal 43 (W/BK) : 12.6 V or more
Ignition switch
ON:
Both: Battery Voltage (12.6 V or
more)
If the meter does not read as specified, check the follow-
ing:
Main Fuse 30 A (see Electrical System chapter)
ECU Fuse 15 A (see DFI Power Source section)
ECU Main Relay (see DFI Power Source section)
Power Source W iring (see wiring diagram below)
If the inspection checks good, the ECU is damaged. Re-
place the ECU. The ECU itself cannot be checked or ser-
viced.
ECU Power Source Circuit
A. ECU
S. ECU M ain Relay
T. Ignitio n S witch
a. ECU Fuse 15 A
d. Starter Relay
e. Joint Connector C
f. Sealed Battery
j. Joint Connector B
k. Main Fuse 30 A