Subsection 03 (IGNITION SYSTEM)
IGNITION COIL INPUT VOLTAGE TEST
CONNECTORS
VOLTAGE
Pin 2 with battery ground
Battery voltage
If battery voltage is NOT read, check continuity of
ignition coil supply circuit. Refer to
WIRING DIA-
GRAM
.
Testing the Ignition Coil Ground Circuit
Continuity
1. Disconnect the ECM connector and connect
it to the ECM adapter tool. Refer to
ELEC-
TRONIC FUEL INJECTION (EFI)
subsection.
vmr2012-031-005_b
TYPICAL
1. ECM
2. ECM connector cover
REQUIRED TOOLS
ECM ADAPTER TOOL
(P/N 529 036 166)
FLUKE 115 MULTIMETER
(P/N 529 035 868)
2. Check wiring continuity as per following table.
IGNITION COIL GROUND CIRCUIT
CONTINUITY TEST
COMPONENT
PIN
(IGNITION
COIL
CONNECTOR)
PIN
(ECM
CONNECTOR)
Cylinder 1 (front)
1
M1
Cylinder 2 (rear)
3
M2
Testing the Ignition Coil Resistance
An ignition coil with good resistance measure-
ment can still be faulty. Voltage leakage can occur
at high voltage levels which is not detectable with
an ohmmeter. Replacing the ignition coil may be
necessary as a test.
Primary Windings
1. Disconnect HIC2 connector.
vmr2012-031-005_a
TYPICAL
1. ECM
2. ECM connector cover
3. HIC2 connector
2. Disconnect ECM connector and connect it to
the ECM adapter tool.
REQUIRED TOOL
ECM ADAPTER TOOL
(P/N 529 036 166)
3. Using a multimeter set to
, check resistance
in primary windings as follows.
IGNITION COIL RESISTANCE TEST
PRIMARY
CIRCUIT
ENGINE
CONNECTOR
(HIC2)
ECM
CONNECTOR
RESISTANCE
@ 20°C
(68°F)
Cylinder 1
(front)
M1
Cylinder 2
(rear)
Pin C
M2
.3 - .6
If any resistance is not good, measure resistance
directly on coil. If second test is ok, check wiring.
Secondary Windings
Due to the integrated diode, it is not possible
to take any resistance measurement of the sec-
ondary winding.
4
vmr2016-134