"Sterling" wrote: > The code 15 error is gone. I check for good ground path and > check the resistance of the spark plug wire set, they are all > within the spek, it has a new totor and disributer cap. there > is no short in in all the wire in the ignition circuit. I > replaced the coil with a new one and still have the same one > spark problem. I think as the ignition is turned ON the ECU > will see the crank angle senor, the crank angle sensor wires > are directly connected to the ECU. The two wire from the > disributer also directly connected to the distributer. the 12 > volt and GND are present at the primery coil and to the > igniter, there is good continuity between the blue/red wire > going from ECU to the igniter. there is a single blue wire > going between the igniter and the primery coil which Idon't > know what it should mesure. so this is a close loop circuit > for the ignition. The only thing Ihave not changed is the > crank angle sensor. what do youthink? thanks
Here is what found out so far.
1 ? The two wire from distributor is connected directly to the ECU with good continuity and no short
2 ? There is GND and +12 voltage present to the igniter and the coil primary.
3 ? There is good continuity between the ECU and the igniter via the blu/red wire
4 ? The crank angle sensor is directly connected to the ECU. I don?t know how to test this one.
5 - There is good continuity on the single blue wire from coil primary to the igniter. I don?t know what is the reason for this wire.
So I am guessing that the distributor sends a signal to ECU and the ECU looks at both signal from the crank angel sensor and the distributor before it can decide to send a signal to igniter via the red/blu wire and if everything is well then the igniter releases the signal via that single blue were to the primary coil. Am I even close in my understanding of this circuit?
This cover all the wiring in the ignition circuit which includes, distributor, ECU, Igniter, coil, crank angle sensor,. So what am I missing? After disconnecting the battery the code 15 error disappeared and did not come back, it would show up only if I disconnect the igniter 4P connector. Someone suggested to use a NOID light to check for Injector pulse. I am still dead in the water. Thanks for your help.