94 vette automatice service asr and service abs lights on
Did the paper clip method and here is what she told me

c12
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module 4 h 74
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module 9 h33 and h73
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A
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1.0
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Please help me define these or how to reset them

 

http://www.digitalcorvettes.com/foru...56&postcount=9

 

Module 4 History 74
Traction Control System circuit LOW

The PCM receives an input from the traction control system when a traction event is occurring. The PCM will inhibit up shifts and downshifts and torque converter clutch operation during a traction control event.

DTC 74 will set when
1) Transmission shifter is in park or neutral.
2) TCS/ASR active signal line input is at zero volts.
3) Above conditions met for longer than 2 seconds

Action taken.
1) Inhibit Torque Converter Clutch operation.
2) Inhibit 4th gear if in hot mode.

DTC 74 will clear when the fault condition is no longer exists, and the ignition switch is cycled Off then On.

Module 9 History DTC 33

DTC 33 will set when a short to voltage or an open circuit in the Right Rear speed sensor circuit is detected. The testing for this malfunction occurs with the ignition On and the vehicle at rest.

Action taken.
The Service ABS and Service ASR indicators will be On.

Module 9 DTC history 73
Spark Retard Monitoring Malfunction.

DTC 73 will set when the EBTCM senses an open , short to voltage or short to ground on Circuit 1687. The Service ASR indicator will turn On and Traction Control is disabled. ABS remains functional.

Circuit description.
The EBTCM upon sensing the need for Traction Control System intervention, requests spark retard from the PCM by supplying 12 volts to Circuit 1687.

You can clear the EBTCM DTC's by doing the following.

After you pull the codes, the LCD will display 1.0
1.0 means waiting for instructions CCM

Keep pressing the Trip/Reset button on the Driver Information Center until you see 9.0 in the trip monitor area of the instrument cluster.

Keep pressing Trip/ODO button until until 9.7 appears in the trip monitor area of the instrument cluster.

Press ENG/MET button and hold until ----- appears in the speedometer area of the cluster. This clears any ABS/ASR DTC's.

Turn ignition OFF.

Turn ignition On and verify that no ABS/ASR DTC's are present.

 

Thank you thank you thank you, I wish I could repay you guys somehow for your advice and knowledge. You saved me hundreds of dollars. I can only hope to return the favor sometime.

 

If DTC 33 sets again after you cleared any codes it indicates something is wrong with the Right Rear wheel speed sensor or its wiring.

Jack the car up and look at the wiring.

Here's what the manual says.

No gap adjustments are allowed on the rear wheel speed sensors.
The rear speed sensor is a tight fit into the rear knuckles and is pushed in by hand. Each replacement sensor is identified with a white tag located on the neck of the sensor and labeled Left or Right. The speed sensors measure the speed of the rear wheel speed sensor rings resulting in an electric signal passed on to the EBTCM.

Unplug the two wire connector at the Right Rear wheel speed sensor.
Use an ohm meter and measure the resistance of the speed sensor.
Should be 900-1100 ohms.

If that checks out, follow and look at the wiring from the speed sensor going to the EBTCM. Verify it's not damaged. If that looks good, Open the rear driver side storage lid and remove the plastic storage tray. Look underneath it and you'll see the EBTCM.

Some people have reported water leaking into that storage area.

If that's not the problem, disconnect the negative battery cable and re seat the cables going to the EBTCM. Reconnect the battery, clear any codes. Turn the ignition Off then back On, see if the code 33 sets again.

If it does, the EBTCM could be bad.

 

Ok, I will do just that, If I did not mention I did find an inch of water in that compartment behind drivers seat and at least a half gallon in the passenger side compartment, funny thing is not sure where water is coming in seals look good, anyhow, the unit that is behind the passenger side has a metal box there that is rusted out next to the jack and some wires disconnected, I am assuming this is the bose system unit, I no longer have the bose in car. On the drivers side like I said did find water there but everything looks OK. I will let you know what I find once I jack car up and remove wheel. Is there anything in that passenger side compartment that could have caused this?

 

I don't believe anything in the passenger side storage compartment could cause the DTC 33 problem. But water and electronics are

This is a static test done by the EBTCM to verify the proper resistance of the wiring and the resistance of the wheel speed sensor. In your case it's detecting an Open circuit as if the wheel speed sensor is not plugged in or the resistance of the circuit is greater than it should be.

If you find no problem. Disconnect the Left Rear speed sensor. Turn the ignition On and see if DTC 37 sets. This is the DTC for LR wheel speed sensor continuity malfunction which is the same as DTC 33 but for the Left Rear speed sensor.

 

Good to know I am on it, I will have the car on a jack soon and let you know my findings. You have been great so far. I will check these connections and see what the stroy is. I have a feeling it could be the salt air down here affecting the connections, car has never been to jersey shore, but I cannot rule out the water I found in compartment either. Get back to you soon...