86.5 - 92 Toyota Supra MK3 7MGE Coil / Igniter 89620-14430 / 90919-02154 OEM. |
Jocelyn,Been looking at this thread lately to help a fellow MK2 owner that is stranded with a defective '85 (-14361) unit.
Looking at the electronic module, here is what I understand as the wires coming out of the Igniter case strain relief:
1-light yellow = tach signal to cluster
2-light pink#1 = 12V power source
3-light pink#2 = Prim COIL+ (12V)
4-red = IGf (trigger feedback to ECU)
5-white = IGt (trigger command from ECU)
6-black = Prim COIL- (commnd ground)
7-black (opt) copy of above, for EFI/Tach checker
Making it work in your car year is, a mentionned previously, matching your body connectors.
On an 85, the wires on the body side of the connectors are:
1=> 1male B wire
2=> 1female thick B-R wire
3=> goes to coil +
4=> 2female position 1 G-W wire
5=> 2female position 2 G wire
6=> goes to coil -
7=> CAPPED, not connected.
The other important point not mentioned above is that the module needs to have a good case to ground connection, as it needs this ground to properly charge the coil. So the mounting points needs to be cleaned!
Ah, that makes sense. I thought that it had to be a hold over from that, but have never seen 1982 EWD or TSRM.You are totally right Dale.
I even had an error in my list (4<>5 descr)
The wires going to distributor is totally wrong as you mentioned, but may be accurate for 82 and legacy from ealier models, which had vacuum or speed advanc, not under control of the ECU. Thoses would not be compatible with TCCS-ESA of the later years.
See the 82 TSRM: View attachment 18735
The 82 TEWD is very different from the 85/86.
I have found it on the fb page, here.
Yes i've edited description of 4<>5.
On 6, yes it's a typo, I corrected it also. It is the module sinking primary coil to ground /or not, that makes the dv/dt magnetic flux variation, which flux discharge in the secondary coil for the spark.
For someone willing to swap connectors to module, all the above info is gold!
Now, on my search to help a fellow MK2 owner, I traced a 89620-22300 assembly with 2 pin coil. It is listed for a Cressida 83-84. I think it would work on a MK2, just swapping the base.
Yes, that should work perfectly with the base swapped.It is the module sinking primary coil to ground /or not, that makes the dv/dt magnetic flux variation, which flux discharge in the secondary coil for the spark.
Now, on my search to help a fellow MK2 owner, I traced a 89620-22300 assembly with 2 pin coil. It is listed for a Cressida 83-84. I think it would work on a MK2, just swapping the base.
Yes, this looks like what the USDM 5MGE system with TCCS actually looks like!Here is a little bit more modern TCCS system still using distributor
View attachment 18864
I had a problem once where the a bad earth shown below caused a weak cam signal from the dist to the ecu, which caused the ecu to not send signal to the igniter, causing no spark.
Diagram for 1989 1G GTE