Ignition Signal

Component Description




IGNITION COIL & POWER TRANSISTOR (BUILT INTO DISTRIBUTOR)
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 distributor cap and rotor head.

Consult-II Reference Value In Data Monitor Mode:

ECM Terminals And Reference Value Part 1:

ECM Terminals And Reference Value Part 2:

EC-EGNSYS-01:

EC-EGNSYS-01 Connector View:

Wiring Diagram

Super Multiple Junction (SMJ) Terminal Arrangement (E75, M6):

Fuse Block - Junction Box (J/B) Terminal Arrangement (B1, E71, E72, E73, M1, M2, M3, M4, M5):

Steps 1 - 3:

Steps 4 - 5:

Steps 6 - 8:

Steps 9 - 10:

Diagnostic Procedure

Component Inspection

IGNITION COIL




1. Disconnect ignition coil harness connector.
2. Check resistance as shown in the figure.




3. For checking secondary coil, remove distributor cap.




4. Check resistance between ignition coil harness connector terminal 8 and coil tower metal tip 9 (secondary terminal) on the distributor head.
If NG, replace distributor.




POWER TRANSISTOR
1. Disconnect distributor harness connector.




2. Check power transistor resistance between terminals 5 and 7.
If NG, replace distributor.




RESISTOR
1. Disconnect resistor harness connector.
2. Check resistance as shown in the figure.
Resistance: 4 - 8 ohm [at 25 °C (77 °F)]
If NG, replace distributor cap.