ECU Power Supply Inspection
Remove the number plate (see Number Plate Removal in
the Frame chapter).
Visually inspect the ECU connector.
If the connector is clogged with mud or dust, blow it off
with compressed air.
Remove the ECU (see ECU Removal).
Visually inspect the terminals [A] of the ECU connectors.
If the terminals of the main harness connector are dam-
aged, replace the main harness.
If the terminals of the ECU connector are damaged, re-
place the ECU.
Disconnect the capacitor lead connector [A].
Set a digital meter [A] and check the following wiring for
ECU Grounding Inspection
Capacitor Connector [B] (BK/Y lead) ←→
ECU Connector [C]
BK/Y lead [D] (ECU Terminal 6)
BK/Y lead [E] (ECU Terminal 22)
BK/W lead [F] (ECU Terminal 33)
Criteria: 0 Ω
If no continuity, check the connector or main harness, and
repair or replace them if necessary.
If the wiring is good, check the power supply voltage of
Be sure the battery is fully charged.
Connect the ECU connector.
Refer to the Self-diagnosis Procedures, connect the 12 V
battery to the main harness.
FUEL SYSTEM (DFI) 3-69