Still no spark - started Ground Location B

wayja · 07-01-2012, 06:35 PM

Ok, here is what I done so far. I have resoldered the wires at the connector that goes to the coil pack and replaced the ground wire to the coil plate. Still no joy. After doing the work I cranked the engine over and then checked codes. All I am ever getting is 51. That shouldn't prevent spark should it? I have the cover off the back of the ignitor and get 12v on four wires with the key on. Is that normal? When I crank it I am not getting any voltage to light a trouble light. There is no tach movement when I crank it over either. If the ignitor was bad, would it trigger an alarm code of some kind? Any ideas would be greatly appreciated.

Thank you.

wayja · 07-01-2012, 06:39 PM

I guess I should also mention that I have disconnected the alarm box and jumpered the appropriate wire to ground. I have power across all fuses under the hood. It sounds like all relays are clicking.

cre · 07-02-2012, 06:10 AM

I'm pretty sure the ECU diagnostic of the igniter requires at least partial operation. As in it counts missed IGt and IGf signals.... I'd have to do a little reading to be sure.

wayja · 07-02-2012, 07:37 PM

New Development! While troubleshooting and ohming wires and testing voltages, the car no longer cranks over with the key. The starter relay clicks, but no fuel pump operation and no starter rotation. I checked all connectors and they are good, and the battery is fully charged. I thought maybe the neutral start switch (this is an automatic car) so I looked for a way to temporarily bypass it for testing. I found two connectors under the intake manifold, one with six wires and one with three. I disconnected the six connector wire. The TSRM says that all six wires should have continuity.? Just for fun, I checked voltages at the ECU. According to the schematics, after the starter relay there is a connector to the ECU (NSW). It has 12V when turning the key. I checked the wire afterthe switch (it is still disconnected and got 12V on pin STA. How can this be? Any ideas would be greatly appreciated.

Thank you.

07-02-2012, 06:10 AM	#3
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	I'm pretty sure the ECU diagnostic of the igniter requires at least partial operation. As in it counts missed IGt and IGf signals.... I'd have to do a little reading to be sure. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

07-02-2012, 07:37 PM	#4
wayja Stock Join Date: May 2012 Location: Chico, CA Posts: 10	New Development New Development! While troubleshooting and ohming wires and testing voltages, the car no longer cranks over with the key. The starter relay clicks, but no fuel pump operation and no starter rotation. I checked all connectors and they are good, and the battery is fully charged. I thought maybe the neutral start switch (this is an automatic car) so I looked for a way to temporarily bypass it for testing. I found two connectors under the intake manifold, one with six wires and one with three. I disconnected the six connector wire. The TSRM says that all six wires should have continuity.? Just for fun, I checked voltages at the ECU. According to the schematics, after the starter relay there is a connector to the ECU (NSW). It has 12V when turning the key. I checked the wire afterthe switch (it is still disconnected and got 12V on pin STA. How can this be? Any ideas would be greatly appreciated. Thank you.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Ground Location B	wayja	MKIII Supra	3	06-25-2012 11:38 PM
Crank, no spark	ando67	MKII Supra	3	08-29-2010 09:09 AM
No spark issues	DDBT	MKII Supra	2	01-06-2009 07:08 AM
NGK Spark Plugs	91 Supra	MKIII Supra	5	08-07-2007 03:52 AM

07-01-2012, 06:35 PM	#1
wayja Stock Join Date: May 2012 Location: Chico, CA Posts: 10	Ok, here is what I done so far. I have resoldered the wires at the connector that goes to the coil pack and replaced the ground wire to the coil plate. Still no joy. After doing the work I cranked the engine over and then checked codes. All I am ever getting is 51. That shouldn't prevent spark should it? I have the cover off the back of the ignitor and get 12v on four wires with the key on. Is that normal? When I crank it I am not getting any voltage to light a trouble light. There is no tach movement when I crank it over either. If the ignitor was bad, would it trigger an alarm code of some kind? Any ideas would be greatly appreciated. Thank you.

07-01-2012, 06:39 PM	#2
wayja Stock Join Date: May 2012 Location: Chico, CA Posts: 10	I guess I should also mention that I have disconnected the alarm box and jumpered the appropriate wire to ground. I have power across all fuses under the hood. It sounds like all relays are clicking.