Suzuki Wagon R Manual page 609

6F1-2 IGNITION SYSTEM (ELECTRONIC IGNITION SYSTEM)
The ignition system is an electronic (distributorless) ignition system. It consists of the parts as described below and
has an electronic ignition control system.
D ECM
It detects the engine and vehicle conditions through the signals from the sensors, determines the most suitable
ignition timing and time for electricity to flow to the primary coil and sends a signal to the ignitor (power unit) in
the ignition coil assembly.
D Ignition coil assembly (including an ignitor)
The ignition coil assembly has a built-in ignitor which turns ON and OFF the current flow to the primary coil accord-
ing to the signal from ECM. When the current flow to the primary coil is turned OFF, a high voltage is induced
in the secondary coil.
D High tension cords and spark plugs.
D CMP sensor (Camshaft position sensor) and CKP sensor (Crankshaft position sensor)
Using signals from these sensors, ECM identifies the specific cylinder whose piston is in the compression stroke
and detects the crank angle.
D TP sensor, ECT sensor, MAP sensor and other sensors/switches
Refer to section 6E for details.
Although this ignition system does not have a distributor, it has two ignition coil assemblies (one is for No.1 and
No.4 spark plugs and the other is for No.2 and No.3 spark plugs). When an ignition signal is sent from ECM to the
ignitor in the ignition coil assembly for No.1 and No.4 spark plugs, a high voltage is induced in the secondary coil
and that passes through the high-tension cords and causes No.1 and No.4 spark plugs to spark simultaneously.
Likewise, when an ignition signal is sent to the ignitor in the other ignition coil assembly, No.2 and No.3 spark plugs
spark simultaneously.
SYSTEM COMPONENTS
1. ECM
2. Ignition coil assembly
for No.1 and No.4 spark plugs
3. Ignition coil assembly
for No.2 and No.3 spark plugs
GENERAL DESCRIPTION
4. CMP sensor
5. CKP sensor
6. MAP sensor
7. ECT sensor
8. IAT sensor
9. TP sensor
10. VSS
11. Transmission range switch (A / T)
12. High-tension cords
13. Monitor connector
14. Knock sensor