Ignition System: Testing and Inspection

COMPONENT DESCRIPTION

Ignition coil & power transistor
The ignition coil is built into distributor. The ignition signal from the ECM is sent to the power transistor. The power transistor switches on and off the ignition coil primary circuit. As the primary circuit is turned on and off, the proper high voltage is induced in the coil secondary circuit.

The distributor is not repairable and must be replaced as an assembly except for the distributor cap and rotor head.

NOTE: The rotor screw which secures distributor rotor head to the distributor shaft must be torqued properly.

With Tightening Torque: 3.3 - 3.9 N.m (0.34 - 0.40 kg.m, 29.5 - 34.7 in.lb)

Consult-II Reference Value In Data Monitor Mode:

ECM Terminals And Reference Value Part 1:

ECM Terminals And Reference Value Part 2:

EC-IGN/SG-01:

EC-IGN/SG-01 Connector View:

WIRING DIAGRAM

Super Multiple Junction (SMJ):

Part 1:

Part 2:

DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION







Ignition coil
1. Disconnect ignition coil harness connector.
2. Check resistance as shown in the figure.
For checking secondary coil, remove distributor cap and measure resistance between coil tower metal tip e and terminal 7.
If NG, replace distributor assembly as a unit.







Power transistor
1. Disconnect camshaft position sensor & power transistor harness connector and ignition coil harness connector.
2. Check power transistor resistance between terminals 1 and 2.
If NG, replace distributor assembly.




Resistor
1. Disconnect resistor harness connector.
2. Check resistance between terminals 1 and 2.
Resistance: Approximately 2.2 kohm [at 25 °C (77 °F)]
If NG, replace resistor.