Torque Converter Clutch Solenoid Circuit: code 37 on 1989 W150
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Torque Converter Clutch Solenoid Circuit: code 37 on 1989 W150
I am getting a code 37, torque converter clutch solenoid circuit, condition on a 1989 W150 from the PCM. The truck bucks and hesitates under acceleration. Based on the drivability of the truck it seems the circuit could be intermittent or not behaving as intended.
Does anyone have information on this circuit? A wiring diagram? Location of the sensor and associated connections? The Haynes repair manual is lacking in information on troubleshooting this code. Any help or pointing in the right direct for information would be appreciated.
Thank you.
Does anyone have information on this circuit? A wiring diagram? Location of the sensor and associated connections? The Haynes repair manual is lacking in information on troubleshooting this code. Any help or pointing in the right direct for information would be appreciated.
Thank you.
Last edited by Shaun Wicklein; Oct 6, 2018 at 07:57 PM.
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From: Clayton MI
TCC solenoid circuit is quite easy. Power wire running to trans, ground wire coming out. PCM controls ground side of the circuit. You can install an indicator light in line with the ground side of the circuit, to give you a visual indication of when the PCM is turning it on.
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Update on the troubleshooting and other questions.
Found the wiring connector to the TCC solenoid that is located inside the transmission. There are 3 wires coming out of a connector at the back drivers side of the transmission: black, blue, and white. The black and white wires ran to a connector in the engine compartment on the passenger side by the firewall. The blue wire ran to a small connector that was hanging beside the transmission not connected to anything. The connector for the black and white pair was disconnected and then we test drove the truck. It shifted fine and accelerated fairly smooth with no sudden surges and jolts at shift points. This leads me to believe the solenoid is functioning but the PCM is turning on the TCC solenoid at incorrect times.
Questions:
What sensors and connections cause the PCM to turn on the TCC solenoid?
Should the blue wire be connected to something? If so, what?
Thanks for for the help.
Found the wiring connector to the TCC solenoid that is located inside the transmission. There are 3 wires coming out of a connector at the back drivers side of the transmission: black, blue, and white. The black and white wires ran to a connector in the engine compartment on the passenger side by the firewall. The blue wire ran to a small connector that was hanging beside the transmission not connected to anything. The connector for the black and white pair was disconnected and then we test drove the truck. It shifted fine and accelerated fairly smooth with no sudden surges and jolts at shift points. This leads me to believe the solenoid is functioning but the PCM is turning on the TCC solenoid at incorrect times.
Questions:
What sensors and connections cause the PCM to turn on the TCC solenoid?
Should the blue wire be connected to something? If so, what?
Thanks for for the help.
Last edited by Shaun Wicklein; Oct 7, 2018 at 09:04 PM.
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A quick search of the internet didn’t yield anything conclusive on identifying the type of transmission. Based on the year and model of the truck it would seem to be a A500 model transmission. Are there any identification codes stamped on the transmission? Easy way to identify type?
Thanks.
Thanks.
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solenoid issue in 1992 D150
Similar problem here. There is only one wire going to the solenoid. It is a blue wire with a white stripe. I just replaced the solenoid yesterday and i have no way to reset the code. According to Haynes it will require 50 startups to remove the code, so I don't know if the repair was successful. One thing I've learned is that Dodge referred to the locking torque converter as an overdrive. The trans is a A998 and is plainly a three speed w/o an overdrive. It is in a 1992 D150. I'm getting a code 45 which is a Transmission Overdrive solenoid Open or Short Circuit. I checked the resistance from the blue wire to the frame and show 20 ohms, which is neither an open nor a short. I sat in the driveway and turned the key on and off 55 times and the code did not clear. Perhaps it actually takes 50 startups.