1994 C4 problems and codes
Thread Starter
Intermediate
Joined: Jul 2024
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1994 C4 problems and codes
My 94’s speedometer read 0 and doesn’t change as well as the odometer not moving from current mileage. Getting codes H24 H59 H73 H82 H83 H90
DTC 24 – Vehicle Speed Sensor (VSS) Circuit
DTC 59 – Transmission Fluid Temperature (TFT) Sensor Circuit High (Low Temperature Indicated)
DTC 73 – Pressure Control Solenoid (PCS) Circuit (Current Error)
DTC 82 – Transmission 1-2 Shift Solenoid Circuit
DTC 83 – TCC PWM Solenoid Circuit Fault
DTC 90 – Transmission TCC Solenoid Circuit
I know they have an H for history but I cleared them and these ones came right back. If anyone has any possible solutions and or where these components are and what the ohms should be I’d be very grateful.
DTC 24 – Vehicle Speed Sensor (VSS) Circuit
DTC 59 – Transmission Fluid Temperature (TFT) Sensor Circuit High (Low Temperature Indicated)
DTC 73 – Pressure Control Solenoid (PCS) Circuit (Current Error)
DTC 82 – Transmission 1-2 Shift Solenoid Circuit
DTC 83 – TCC PWM Solenoid Circuit Fault
DTC 90 – Transmission TCC Solenoid Circuit
I know they have an H for history but I cleared them and these ones came right back. If anyone has any possible solutions and or where these components are and what the ohms should be I’d be very grateful.
Thread Starter
Intermediate
Joined: Jul 2024
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Ok will do but should my zf6 manual transmission even have these sensors? Isn’t the tcc solenoid for an automatic?
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Drifting
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Sounds like the PCM, for some reason, has a bin (the “programming”) for an automatic. Probably replaced at some point in the past with a junkyard unit. If you have a Windows laptop and invest in a <$100 cable you can reflash it easily yourself with free software - that is presuming the rest of the engine is stock, if it’s modded then tuning for those mods gets a bit more complicated.
Thread Starter
Intermediate
Joined: Jul 2024
Posts: 30
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Sounds like the PCM, for some reason, has a bin (the “programming”) for an automatic. Probably replaced at some point in the past with a junkyard unit. If you have a Windows laptop and invest in a <$100 cable you can reflash it easily yourself with free software - that is presuming the rest of the engine is stock, if it’s modded then tuning for those mods gets a bit more complicated.
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Thread Starter
Intermediate
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Ok I make a post for that but do you know why the speedometer with 0 with a code 24? From what I’ve seen is the ecm not seeing the vss signal
Burning Brakes
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From: Richmond Hill Ontario
Drifting
Joined: Aug 2009
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I’d start with validating you have the right bin before digging in on codes/speedo. Might be related, I don’t know if the VSS for auto is different, it’s probably expecting different counts at minimum. The right bin might resolve it.
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Intermediate
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Thread Starter
Intermediate
Joined: Jul 2024
Posts: 30
Likes: 2
Thread Starter
Intermediate
Joined: Jul 2024
Posts: 30
Likes: 2
Thread Starter
Intermediate
Joined: Jul 2024
Posts: 30
Likes: 2
Last edited by Ayjoki; Jul 19, 2024 at 08:16 PM.