CharlieC5Z06

So my 2002 z06 is having active handling issues again. I fixed it months ago by cleaning the ground points and it seemed to go away for a while. I just added a procharger and a bunch more horsepower and now when my engine oil gets above 215 i get the service vehicle soon. service active handling. So I searched the forums and cleaned all the ground points again. Everything was pretty clean and I went and drove it again. It was fine until the engine heated up to 216 then the messages came again. These are the codes I am getting.
c1282, c1284, c1285, c1287, c1288, c1296.

I am guessing I am at the point where I need a new EBCM or send it in for repair. Can the heat be causing this issue?

Thanks

Bill Curlee

All of those DTCs are EBTCM sensor related and the voltages supplied to them come from the EBTCM. If you CLEAR all those DTCs and allow the system to ERROR out again after you clear them; THEN, before you turn the ignition switch off,,, READ THE DTCs

If you have any messages in the DIC, just press RESET until you get a screen that allows you to read the DTCs

Then post up the DTCs that come up.

The EBTCM is one of the modules that clears out the old DTCs during each ignition cycle.


If all of those sensors are still having issues, I would first look at the wiring harness and main connector for wiring damage.

Also disconnect the main EBTCM Connector and make sure that the FEMALE PINS are not spread apart and or damaged.

The SIX pins on the bottom row are the power pins:

Bill Curlee

Actually check these pins with a meter to chassis ground and INSURE that you are seeing FULL BATTERY VOLTAGE at each power PIN and the proper GROUND on pin B!

A = HOT when Ignition is ON
B = GROUND to Chassis
D & E = HOT at ALL TIMES

CharlieC5Z06

Ok thanks. I'll try that and let u know

CharlieC5Z06

Ok so I cleared the codes and drove around and the error came up on DIC saying service active handling. Before I shut car off i checked the codes and it came up with the same ones as before with a H C after them just like before.

Are the ABDE pins the ones in that picture from left to right?

CharlieC5Z06

Ok so I cleared the codes and drove around and the error came up on DIC saying service active handling. Before I shut car off i checked the codes and it came up with the same ones as before with a H C after them just like before.

Are the ABDE pins the ones in that picture from left to right?

CharlieC5Z06

So I just checked those pins with multimeter. With car off only thing that was hot was the furthest pin to the right in that picture. With the car on the only pins that were hot were the same furthest right and the one right next to it. So the two furthest to the right.

lonerider2002

If you have an older or undersized battery(group 75) replace it with a new group 78 battery (preferably an AGM ). I was having some of the same issues due to low voltage and no codes since I replaced it two months ago. I's worth a shot.

CharlieC5Z06

Thanks I replaced my battery a couple
Months ago with a duralast gold 78. Can someone confirm what pins in that picture need
To be hot and when? Guess next step
Is to trace the wires and see if anything is broken.

CharlieC5Z06

So I checked the wiring and it all looks good except for checking the voltage on the pins. A little clarity on that would be awesome. I reseated it and went for a ride. I kept traction control on and did a quick burnout and it said active handling active or whatever it says. So it seems like the active handling works. I drove it around till oil temp got to like 215 then sat it in my driveway and let it run. Once the temp got to like 218 the service vehicle soon, service active handling message appeared and the traction control light went on. Can it have anything to do with the temp?

Bill Curlee

Without having a GM TECH2 I need to know what DTC the EBTCM is throwing. What is it NOT happy with???

Please quarry that code "WITHOUT TURNING OFF THE IGNITION" & (PRESS RESET to clear the messages) the very second that it happens and post it.

CharlieC5Z06

OK so I cleared all the codes and started the car with no codes. Once the car threw the error message I checked the codes and this is what I got.
PCM- P0103 H C
TCS: C1282 HC, C1284HC, C1285 HC, C1287 HC, C1288 HC, C1296 HC

Thanks for the help

Bill Curlee

Actually check these pins with a meter to chassis ground and INSURE that you are seeing FULL BATTERY VOLTAGE at each power PIN and the proper GROUND on pin B!

A = HOT when Ignition is ON
B = GROUND to Chassis
D & E = HOT at ALL TIMES

Look at the connector end view.............. If you don't have power and ground on the pins that are suppose to have power and ground,,,, THATS AN ISSUE.

Please recheck again and post what you see.


As for the P-0103,,,,,,,,,, That's a MAF CODE and what in the world would cause that to POP! The MAF FUSE is (ENGING-1 Fuse # 19. There are TWO small test slots on top of ALL the fuses. Use a voltmeter and check both of those test slots to CHASSIS ground. Especially when the DIC shows that you have P-0103!

You SHOULD see FULL BATTERY VOLTAGE on that fuse (ignition ON)

If not check PCM -- Fuse #15 Ignition ON

The RELAY that controls the power to the MAF is IGN Relay #42

CharlieC5Z06

Ok I'll check those. Just realized the maf was disabled by my tuner due to my Procharger and new map sensor. Things weren't playing nice. So that's not an issue.

CharlieC5Z06

Ok so ignition off. I get 12v on A and a good ground on B. With ignition on. I get 12v on A still and then 12v on B. No power to any other pins with ignition on.

Bill Curlee

Something is seriously wrong here... Here is a schematic of the EBTCM showing power and ground. Compare the wire color to the pin locations on your connector and make sure that the pin location is labeled correctly. Then go from there:

CharlieC5Z06

ok thanks I will try and make sense out of that.

CharlieC5Z06

So I checked all the fuses on the top of the diagram and they are all good. I cant really understand the rest of it. I just took my car out and when the oil temp was at like 150 I turned the active handling on and tried to do a burnout and it stops me. So even though i am not getting all the correct voltage on those pins it seems like the traction control is working. I am going to try and put it on competition mode in a little while and try and do a doughnut to see if it stops me. I wonder if I should just send the unit out for repair?

SilverC54me

Where are you located? If in the Los Angeles area I can help with the diagnostics.

Gary

CharlieC5Z06

I really appreciate that but I'm in NY. Thanks a lot though