Service manual

FUEL SYSTEM (DFI) 3-65
Ignition Coils (#1, #2: Service Code 51, 52)
Ignition Coil #1: Ignition Coil for Front Cylinder (Service
Code 51)
Ignition Coil #2: Ignition Coil for Rear Cylinder (Service
Code 52)
Ignition Coil Removal/Installation
CAUTION
Never drop the ignition coils, especially on a hard
surface. Such a shock to the ignition coil can dam-
age it.
•
Refer to the Ignition Coil Removal and Installation in the
Electrical System chapter.
Input Voltage Inspection
NOTE
○
Be sure the battery is fully charged.
•
Turn the ignition switch OFF.
•
Remove the ECU (see ECU Removal). Do not disconnect
the ECU connector.
•
Connect a digital voltmeter as shown, using two needle
adapters.
Special Tool - Needle Adapter Set: 57001-1457
○
Measure the input voltage to each primary winding of the
ignition coils with the engine stopped, and with the con-
nectors joined.
•
Turn the ignition switch ON.
Ignition Coil Input Voltage at ECU
Connections for Ignition Coil #1
Meter (+) → G/W lead (terminal 44)
Meter (–) → Battery (–) Terminal
Connections for Ignition Coil #2
Meter (+) → BL/W lead (terminal 35)
Meter (–) → Battery (–) Terminal
Standard: Battery Voltage (12.8 V or more)
If the reading is out of the standard, check the ECU for
its ground and power supply (see ECU Power Supply In-
spection).
If the reading is good, remove the fuel tank and check the
wiring between the ECU and the primary lead terminals
at the ignition coils.
If the wiring is good, crank the engine, and check the peak
voltage of the ignition coils (see Ignition Coil Primary Peak
Voltage Inspection in the Electrical System chapter) in or-
der to check the primary coils.