Ignition System Check - Daewoo MATIZ Service Manual

Circuit Description
The Electronic Ignition (EI) system uses a waste spark
method of spark distribution. In this type of EI system,
the Crankshaft Position (CKP) sensor is mounted to the
oil pump near a slotted wheel that is a part of the crank-
shaft pulley. The CKP sensor sends reference pulses to
the Engine Control Module (ECM). The ECM then trig-
Caution: Use only electrically insulated pliers when
handling ignition wires with the engine running to
prevent an electrical shock.
Step
1. Remove the spark plugs.
2. Inspect for wet spark plugs, cracks, wear,
improper gap, burned electrodes, or heavy
1
deposits.
3. Replace the spark plugs as needed.
Is the repair complete?
Check for the presence of spark from all of the
ignition wires while cranking the engine.
2
Is spark present from all of the ignition wires?
1. Measure the resistance of the ignition wires.
2. Replace any ignition wire(s) with a resistance
above the value specified.
3
3. Check for the presence of spark from all of the
ignition wires.
Is spark present from all of the ignition wires?
Is spark present from at least one of the ignition
4
wires, but not all of the ignition wires?
1. Turn the ignition OFF.
2. Disconnect the Electronic Ignition (EI) system
ignition coil connector.
5
3. While cranking the engine, measure the voltage
at the EI system ignition coil connector terminal 1.
Does the voltage fluctuate within the values
specified?
Check for an open in the wire from EI system
ignition coil connector terminal 1 to the Engine
6
Control Module (ECM) connector terminal 66.
Is the problem found?
1. Repair the wiring as needed.
2. Connect the EI system ignition coil connector.
7
3. Check for the presence of spark from all of the
ignition wires.
Is spark present from all of the ignition wires?
While cranking the engine, measure the voltage at
the EI system ignition coil connector terminal 2.
8
Does the voltage fluctuate within the values
specified?
DAEWOO M-150 BL2

IGNITION SYSTEM CHECK

Ignition System Check
Action
ENGINE CONTROLS 1F – 45
gers the EI system ignition coil. Each cylinder is individu-
al with coil per cylinder in sequence.
This leaves the remainder of the high voltage to be used
to fire the spark plug in the cylinder on its compression
stroke. Since the CKP sensor is in a fixed position, tim-
ing adjustments are not possible or needed.
Value(s)
–
System OK
–
System OK
30000 Ω
System OK
Go to Step 5
0.2–2.0 V Go to Step 8
–
Go to Step 7
–
System OK
0.2–2.0 V Go to Step 10
Yes No
Go to Step 2
Go to Step 3
Go to Step 4
Go to Step 12
Go to Step 6
Go to Step 11
–
Go to Step 9