Suzuki Wagon R RB310, Supplementary Service Manual

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IGNITION SYSTEM (ELECTRONIC IGNITION SYSTEM) 6F1-3
SYSTEM WIRING DIAGRAM
Diagnosis
1. Ignition switch 7. No.1 spark plug
2. Main relay 8. No.2 spark plug
3. Ignition coil assembly for No.1 and No.4 spark plugs 9. No.3 spark plug
4. Ignition coil assembly for No.2 and No.3 spark plugs 10. No.4 spark plug
5. CMP sensor 11. Sensed information (MAP sensor, ECT sensor, IAT sensor, TP sensor, Knock sensor, VSS, Park/
Neutral position signal, Electric load signal, Engine start signal)
6. CKP sensor
Condition Possible Cause Correction
Engine cranks, but will
not start or hard to
start No spark
Blown fuse for ignition coil
Replace.
Loose connection or disconnection of lead wire
or high-tension cord(s) Connect securely.
Faulty high-tension cord(s) Replace.
Faulty spark plug(s) Adjust, clean or replace.
Faulty ignition coil Replace ignition coil assembly.
Faulty CKP sensor or crankshaft timing belt pul-
ley Clean, tighten or replace.
Faulty ECM Replace.
Poor fuel economy or
engine performance Incorrect ignition timing Check related sensors and crank-
shaft timing belt pulley.
Faulty spark plug(s) or high-tension cord(s) Adjust, clean or replace.
Faulty ignition coil assembly Replace.
Faulty CKP sensor or crankshaft timing belt pul-
ley Clean, tighten or replace.
Faulty ECM Replace.