Code 42, Tranny acting stupid

[levirolla]

Well happened while I was driving in snow and the O/D light started flashing. After that it would not shift correctly. The overdrive acts up, it does not want to pull off in first unless I shift it to L gear and even on the highway it will jump gears rev the engine hard. Changed the speed sensor and didn't help. Going to swap out the ecm next to if thats it, Has Anyone else had this issue

[Bitter]

check the wiring

[Rip The E Brake]

yea, make sure the wiring isn't burnt or pinched or anything on any of the connections to the trans.

[levirolla]

I check all the wiring connections. I still going to swap out stuff and troubleshoot.

[hungryhamster]

what wiring are you talking about here? is it the ignition wiring like spark plug cables and dist. cap and stuff?

[Hook]

Error Code 42 points to a faulty vehicle speed sensor on the transmission. But if you checked it already and already swapped the VSS, so you can try tracing back those three wires to the ECU and check for pinched or severed wires.
Also, as it happened in snow, make sure moisture hasn't penetrated the connector causing a short or anything. Use WD40 to displace the water and then CRC Electronic Contact cleaner.

By chance, did you reset the ECU when u changed the VSS?

Also, does your car have a manual mode? Make sure it's not engaged.

[levirolla]

Thanks for the reply, but yeah I did switch out the vss on the trans and I did reset it. I will check to see if the wiring is damaged today and report back

[Hook]

Additionally, I assumed you got the error code off the CEL.

The O/D Off light also provides error codes for the transmission. In case there's a fault specifically in the transmission, here's how to retrieve it.

A self-diagnosis function is built into the electrical control system. Warning is indicated by the overdrive OFF indicator light.

Note: Warning and diagnostic codes can be read only when the overdrive switch is ON. If OFF, the overdrive OFF light is lit continuously and will not blink.

a. If a malfunction occurs within the speed sensors (No.1 or 2) or solenoids (No.1, 2 or 4), the overdrive OFF light will blink to warn the driver. However, there will be no warning of a malfunction with lock-up solenoid.
b. The diagnostic code can be read by the number of blinks of the overdrive OFF indicator light when terminals TE1 and E1 are connected.
c. The throttle position sensor or brake signal are not indicated, but inspection can be made by checking the voltage at terminal TT of the check connector.
d. The signals to each gear can be checked by measuring the voltage at terminal TT of the check connector while driving.

The diagnostic code (trouble code) is retained in memory by the CPU (of TCCS ECU) and due to back-up voltage, is not canceled out when the engine is turned off. Consequently, after repair, it is necessary to turn the ignition switch off and remove the fuse EFI (15A) or disconnect the TCCS ECU connector to cancel out the diagnostic (trouble) code.

Note: Low battery voltage will cause faulty operation of the diagnosis system. Therefore. always check the battery first. Use a voltmeter and ohmmeter that have an impedance of at least 10K Ohm/Volt.

Check "O/D Off" Indicator Light:

1. Turn the ignition switch ON.
2. The "O/D Off" light will come on when the O/D switch is placed at OFF.
3. When the O/D switch is set to ON, the "O/D Off" light should go out. If the "O/D Off" light flashes when the O/D switch is set to ON, the electronic control system is faulty.

Read Diagnostic Code:

1. Turn ignition switch and o/d switch to ON. Do not start the engine.
Engine NOTE: Warning and diagnostic codes can be read only when the overdrive switch is ON. If OFF, the overdrive OFF light will light continuously and will not blink.

2. Connect TE1, and E1, terminals of check connector.
Read the diagnostic code as indicated by the number of times the O/D OFF light flashes.



Diagnostic Code Indication:

• If the system is operating normally, the light will flash two times per second.

• In the event of a malfunction, the light will flash 1 time per second. The number of blinks will equal the first number and, after 1.5 seconds pause, the second number of the two digit diagnostic code. If there are two or more codes, there will be a 2.5 seconds pause between each.

NOTE: In the event of several trouble codes occurring simultaneously, indication will begin from the smaller value and continue to the larger.

Now, I've seen problems with these transmissions similar to what you're describing where there's a coroded pin in the Neutral Start Switch at the front of the housing that breaks off. I can't explain how moisture gets into that, but I've seen it happen on 4 friends' cars over the last couple years and had to either replace or repair it. Pull that connector and ensure all the (eleven?) pins are present and accounted for.

Replacing is easy once you have access to a similar one. The repair concerns drilling and filing the back of the plastic part of the NSS housing to expose the inside end of the broken lead, making a connector pin (or pulling one off any old connector and cutting/bending to suit), soldering it on and sealing the hole with epoxy. I hope it doesn't come to that.

Let us know how it goes.

[levirolla]

thanks, I will