Another "S" Light Thread

[93till]

I have searched through the similar threads and cannot solve my problem.

91 EXR auto - S light flashing

Read codes - 9 flashes - faulty sensor in distributor

Checked sensor resistance and it was right at the upper limit (don't remember value right now, had shop manual at time).

Changed distributor, problem persists. Disconnected the battery for awhile to see if I had to clear the code. No change.

Here is the thing though - it is just an itermittent problem. If the light is flashing and I turn the car off and on again, the light usually stays off.

So, if it was a sensor or wiring issue wouldn't the light always be blinking?

I'm thinking it may be the TCM itself?

Oh, and the car itself drives fine, despite the light. Spedo works, shifts great etc etc.

Thanks

[93till]

Been reading old threads off and on at work almost all day. If it is the main relay would me engine light also be on? (it's not). And if it was the TCM does the s light stay solid, rather then flashing?

[93till]

Sorry guys, I'm so wound up about this s light I forgot to introduce myself.

I have been lurking here for a while, reading and learing about cb7's definitely some well done clean cars in this club.

The 91 exr is my wifes car and I have a 5th gen prelude (bb6). No pics of the cb7 (its just stock with srv blades) but here is the 'lude (really dirty pic, lol)



Anyhow, I found a cheap tcm and im going to swap it out to see if it solves the problem.

Kevin

[93till]

Well I finally got around to changing the TCM. Problem persists, unchanged. Any thoughts?

[93till]

Friday bump.

[accord91lx]

the tcu has its own set of trouble codes seperate from the regular ECU. They are listed in the service manual

[93till]

the tcu has its own set of trouble codes seperate from the regular ECU. They are listed in the service manual

Yes I know. I am referring to TCM code 9.

[dark_stalker]

Yes I know. I am referring to TCM code 9.

is tcm the same as tcu or different?

[ExplodingCake]

Are you sure it's the TCU? because

TCU code #9 is

9-Counter shaft or transmission speed pulse generator open or shorted.

[93till]

Are you sure it's the TCU? because

TCU code #9 is

9-Counter shaft or transmission speed pulse generator open or shorted.

Thanks for the reply. I thought the counter shaft speed sensor was code 15? and the crankshaft one (in the distributor) was 9? Maybe the counters shaft speed sensor can also trigger code 9.

I will try and find a cheap sensor and swap it out.

thanks

[ExplodingCake]

Thanks for the reply. I thought the counter shaft speed sensor was code 15? and the crankshaft one (in the distributor) was 9? Maybe the counters shaft speed sensor can also trigger code 9.

I will try and find a cheap sensor and swap it out.

thanks

hmm , I don't know if Canadian TCU codes are much different from other tcu's so I have no idea but here are the TCU codes.

1-Lock-up solenoid 'A' circuit open or shorted.
2-Lock-up solenoid 'B' circuit open or shorted.
3-Throttle Position Sensor circuit open or shorted.
4-Vehicle Speed Sensor open or shorted - No signal from speedometer.
5-Shift Lever Position Switch circuit shorted.
6-Shift Lever Position Switch circuit open.
7-Shift Solenoid 'A' circuit open or shorted.
8-Shift Solenoid 'B' circuit open or shorted.
9-Counter shaft or transmission speed pulse generator open or shorted.
10-Coolant Temperature Sensor open or shorted.
11-Engine RPM (Ignition coil signal) open or shorted.
12-(No code 12 used)
13-Main shaft speed pulse generator open or shorted.
14-Linear (line pressure control) solenoid open or shorted.
15-Kick down switch circuit shorted.

[93till]

Thanks. I just grabbed a nc sensor off ebay for 20 bucks. I'll update the thread once i get it in.