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'96 Transmission trouble codes?


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5 replies to this topic

#1 mtsubaru

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Posted 27 March 2005 - 09:21 PM

This is my first post so I'm not sure how much info to give, but I have a '96 OB and when I start it the AT oil temp light blinks 16 times. Does anyone know what this means? Any help would be greatly appreciated.

#2 sea#3

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Posted 28 March 2005 - 02:01 AM

This is my first post so I'm not sure how much info to give, but I have a '96 OB and when I start it the AT oil temp light blinks 16 times. Does anyone know what this means? Any help would be greatly appreciated.

Your TCM (Transmission Control Module ) has a stored code in it . The easiest way is to use a Select Monitor Scan Tool to access the codes
SEA#3

#3 friendly_jacek

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Posted 28 March 2005 - 01:02 PM

You can get the codes without the tool.
Google for subaru TCU secret handshake.
NASIOC forum has the details.

#4 rruge

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Posted 28 March 2005 - 01:36 PM

On-Board Diagnostics for the 4EAT Auto Tranmission

There are two varieties of trouble codes from the Transmission Control Module (TCM); Existing and Previous. Here is how to read the code without the Select Monitor tool.
Existing:
  • Move gear selector to D
  • Turn the ignition switch to On
  • Move the selector to 3, 2, then 1st gear.
  • Depress the gas pedal
Or Previous:
  • Move the selector to 1st gear
  • Turn the ignition switch to On
  • Move the selector to 2, 3, then D gear.
  • Depress the gas pedal
Next, watch the AT Oil Temp light. Here is the output:
  • Light flashes 4 times per second, you have a faulty battery.
  • Light flashes 2 times per second, all is normal.
  • Light remains on, check the inhibitor switch, diagnosis switch, wiring, TCM, etc.
  • Trouble code (see the next section).
Reading the trouble code:
  • Long light pulses (~1.2 seconds) indicate "tens."
  • Short light pulses (~0.2 seconds) indicate "ones."
  • Count the long, then short pulses.
  • Interval between codes are ~1.8 seconds.
  • Codes will repeat.
  • There are about 13 codes ranging between 11 and 33.
Trouble Code
11) Duty solenoid A
12) Duty solenoid B
13) Shift solenoid 3
14) Shift solenoid 2
15) Shift solenoid 1
21) ATF temperature sensor
22) Mass air flow signal
23) Engine speed sensor
24) Duty solenoid C
25) Torque control signal
31) Throttle position sensor
32) Vehicle speed sensor 1
33) Vehicle speed sensor 2

All solenoid issues, "detect open or shorted drive circuit, as well as valve seizure". All sensor or signal issues, "detect open or shorted input signal circuit".

Aside: although Subaru says that the TCM will, "detect... valve seizure", in my case the Duty Solenoid C seizure that I incurred was NOT detected by the TCM.

Good luck and may the force be with you.

Peace, out.... :)

#5 rude

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Posted 28 March 2005 - 09:44 PM

Hello-
16 blinks is your torque control cut off. Been there a few weeks ago. Posted the whole thing.

I used a shop manual which lead me to believe it was my TCU, bought a new one, ran fine for 1/2 hour, then came back, returned TCU (minus a large restocking fee)....I'll just let you read my past posts. Be ready to spend about $750, more if you go to a dealer.

rude

#6 yarikoptic

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Posted 29 March 2005 - 11:00 AM

16 blinks is just that there is a problem registered by TCU - it is nothing specific yet. Guys already described the procedure on how to pull the codes, although in my case (1995 Legacy) I have to connect diagnostic No.5 terminal under the dash to do magical code reading.

Updated: attachement with information you need to start troubleshooting via TCU on 1996 Legacy

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