Ignition Control System

IGNITION CONTROL SYSTEM

1. CHECK IGNITION SYSTEM FOR SPARKS.
1. Remove plug cord cap from each spark plug.
2. Install new spark plug on plug cord cap.

CAUTION: Do not remove spark plug from engine.

3. Contact spark plug's thread portion on engine.
4. While opening throttle valve fully, crank engine to check that spark occurs at each cylinder.




2. CHECK POWER SUPPLY CIRCUIT FOR IGNITION COIL.
1. Turn ignition switch to OFF.
2. Disconnect connector from ignition coil.
3. Turn ignition switch to ON.
4. Measure power supply voltage between ignition coil connector terminal and body.

Connector & terminal / Specified voltage:
(E9) No.2 - Body / 10 V, min.




3. CHECK IGNITION COIL.
1. Measure resistance between ignition coil terminals to check primary coil.

Terminals / Specified resistance:
No.2 - No.1 / 0.7 Ohm
No.2 - No.3 / 0.7 Ohm

2. Measure resistance between spark plug cord contact portions to check secondary coil.

Connector & terminal / Specified resistance:
#1 - #2 / 13.8 kOhm
#3 - #4 / 13.8 kOhm




4. CHECK HARNESS CONNECTOR BETWEEN IGNITOR AND IGNITION COIL.
1. Turn ignition switch to OFF.
2. Disconnect connector from ignitor.
3. Measure resistance of harness connector between ignition coil and ignitor.

Connector & terminal / Specified resistance:
(E24) No.5 - (E9) No.1 / 10 Ohm, max.
(E24) No.6 - (E9) No.3 / 10 Ohm, max.




5. CHECK INPUT SIGNAL FOR IGNITOR.
Check if voltage varies synchronously with engine speed when cranking, while monitoring voltage between igniter connector and body.

Connector & terminal / Specified voltage:
(E24) No.1 - Body / 0.1 V, mm. - 3.4 V, max.
(E24) No.2 - Body / 0.1 V, mm. - 3.4 V, max.




6. CHECK HARNESS CONNECTOR OF IGNITOR GROUND CIRCUIT.
1. Turn ignition switch to OFF.
2. Measure resistance between ignitor and body.

Connector & terminal / Specified resistance:
(E24) No.3 - Body / 10 Ohm, max.

7. CHECK HARNESS CONNECTOR BETWEEN ECM AND IGNITOR.




1. Disconnect connector from ECM.
2. Measure resistance of harness connector between ECM and ignitor.

Connector & terminal / Specified resistance:
(E30) No.20 - (E24) No.1 / 10 Ohm, max.
(E30) No.21 - (E24) No.2 / 10 Ohm, max.
(E29) No.14 - (E24) No.3 / 10 Ohm, max.




3. Measure resistance of harness connector between ECM and body to make sure that circuit does not short.

Connector & terminal / Specified resistance:
(E30) No.20 - Body / 1 MOhm, min.
(E30) No.4 - Body / 1 MOhm, min.
(E29) No.14 - Body / 1 MOhm, min.