Hi,

I'm John with a 2001 Convetible. Bought it on Ebay in 2002 and have been greatful for the forum help on the window controls, and the ECBM posts.

This one may be a little different.

It looks like the relay is good (tested by a local TV repairman) but a capacitor is fried.

What causes this (TV guy said maybe a transistor blew) and how do I fix this? (What is it and where do I get another?)

Do the diode above and the capacitor below need replacinging?

The TV guy said I should get a schematic - anyone have one out there I could use?

I'm not allowed to post attachements - If you look at the ECBM, it is the capacitor (oragne/yellow football) below the upper left diode (Green/Black cylinder (sp)). It charred that diose and the capacitor below.

Thank you.

I will email you the picture if you wish.

Thank you.

John

Thank you.

Cordially,

John

 

Sent mine to www.absfixer.com, I had the extra work done to fix this problem. I think he has an explaination of the issue on his website.

Here's the explaination:
http://www.absfixer.com/catalog/prod...products_id=31

 

You can post picture by using photobucket.com and posting image up here.

Most EBCM repairs are sent out to the ABSFixer.com

Do a search and you'll find more info. A lot depends on what code you're setting off in DTC.

See above post, we were typing at the same time

 

how much is the absfixer? will he guarantee it to fix the 1214 code?

 

There are no detailed schematics for the inside of the EBCM that are available to the general public. Go to the Help Section of the forum and you will get explicit directions on how to post pictures in your posts. Its simple.

Bill

 

$150 for absfixer when my EBCM was repaired, although I can't remember what the codes were.

 

1214 is just the relay, for another $50 I think he upgrades the circuitry so the spikes at power on don't kill the ECBM (which is probably what happened to yours). Go to his site to read all about it. www.absfixer.com

 

i dont have that issue. i have a p0650 issue. but i see on ebay a guy will fix the 1214 and lifetime warranty it for 70$ including shipping both ways....

 

DTC P0650
Circuit Description
A voltage is supplied directly to the malfunction indicator lamp (MIL). The powertrain control module (PCM) controls the lamp by grounding the control circuit via an internal switch called a driver. The primary function of the driver is to supply the ground for the component being controlled. Each driver has a fault line which is monitored by the PCM. When the PCM is commanding a component ON, the voltage of the control circuit should be low, near 0 volts. When the PCM is commanding the control circuit to a component OFF, the voltage potential of the circuit should be high, near the battery voltage. If the fault detection circuit senses a voltage other than what is expected, the fault line status will change causing the DTC to set.

Conditions for Running the DTC
The engine speed is greater than 400 RPM.
The ignition voltage ranges between 6-18 volts.
Conditions for Setting the DTC
The PCM detects that the commanded state of the driver and the actual state of the control circuit do not match.
All above conditions exist for a minimum of 5 seconds.
Action Taken When the DTC Sets
The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
Conditions for Clearing the MIL/DTC
The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
Clear the MIL and the DTC with a scan tool.
Diagnostic Aids

Important
Remove any debris from the PCM connector surfaces before servicing the PCM. Inspect the PCM connector gaskets when diagnosing or replacing the module. Verify that the gaskets are installed correctly. The gaskets prevent contaminate intrusion into the PCM.
For any test that requires probing the PCM or probing a component harness connector, use the connector test adapter kit J 35616-A . Using this kit prevents damage to the harness or component terminals. Refer to Using Connector Test Adapters in Wiring Systems.

If the ignition feed circuit is suspected of being open, verify that the other indicators on that circuit illuminate.
For an intermittent condition, refer to Intermittent Conditions .
Test Description
The numbers below refer to the step numbers on the diagnostic table.

Command both the ON and the OFF states. Repeat the commands as necessary.

If you do not find trouble in the control circuit or the connection at the PCM, the PCM may be faulty. However, this is an extremely unlikely failure.

Step
Action
Yes
No

Schematic Reference: Engine Controls Schematics

1
Did you perform the Diagnostic System Check-Engine Controls?
Go to Step 2
Go to Diagnostic System Check - Engine Controls

2

Important
If the I/P is completely inoperative, refer to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges, and Console.


Turn ON the ignition leaving the engine OFF.
Command the lamp ON and OFF using the scan tool.
Does the lamp turn ON and OFF with each command?
Go to Diagnostic Aids
Go to Step 3

3
Turn OFF the ignition.
Disconnect the PCM connector C2. Refer to Powertrain Control Module (PCM) Replacement .
Turn ON the ignition.
Is the lamp OFF?
Go to Step 4
Go to Step 5

4

Important
If the fuse opens in the fused jumper wire, repair the circuit for a short to voltage.


Probe the lamp control circuit in the PCM harness connector with a fused jumper wire connected to ground. Refer to Using Fused Jumper Wires in Wiring Systems.

Is the lamp ON?
Go to Step 6
Go to Step 7

5
Repair the short to ground in the lamp control circuit. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?
Go to Step 9
--

6
Inspect for a poor connection at the PCM connector. Refer to Testing for Intermittent and Poor Connections in Wiring Systems.
If you find a poor connection, repair the connection as necessary. Refer to Repairing Connector Terminals in Wiring Systems.
Did you find and correct the condition?
Go to Step 9
Go to Step 8

7
Inspect for the following conditions:
A faulty indicator
An open ignition feed to the indicator
A control circuit that is open or shorted to B+
Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
Go to Step 9
--

8
Replace the PCM. Refer to Powertrain Control Module (PCM) Replacement .

Did you complete the replacement?
Go to Step 9
--

9
Use a scan tool in order to clear the DTCs.
Turn OFF the ignition for 30 seconds.
Start the engine.
Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC run, and pass?
Go to Step 10
Go to Step 2

10
With a scan tool, observe the stored information, Capture Info.

Does the scan tool display any DTCs that you have not diagnosed?
Go to Diagnostic Trouble Code (DTC) List
System OK



--------------------------------------------------------------------------------
Document ID# 671853
2001 Chevrolet/Geo Corvette

 

thanks a lot, i have no idea what that means, but ill try and figure it out.

thanks again!

 

Problems with your PCM or connections.

 

thank you, ill locate it and check out connections and inspect for physical damage. Is it on my pass side floor board? or is that the ecu?

 

Make sure you disconnect battery first !!!!!!!

PCM is located behind passenger fender. You're going to have to jack up the car remove front right tire and the inner fender well pieces to access the PCM.

The BCM is located in the passenger footwell, but that's not your problem.

You should check your wiring out by the battery to insure that you don't have a leaky battery that has damged your wiring and PCM.

 

thank you, ill be sure to check that out. is this a common issue? it came on twice in about 30 miles. but that was about 30 miles ago, and knock on wood. hasnt been on yet...i cleared the two codes, so hopefully it was a fluke?

 

I would check out the battery immediately and the wiring underneath of it.

By immediately, I mean right now. If battery acid is leaking, time is of the essence.

 

Wanted to address the dreaded C1214. Followed advice from others on the forum. My 2002 coupe went from intermittent C1214 with accompanying warning lights, to full time gremlin in the fall.
Finally decided to work with Brandon, at ABS fixer.
Cost approx $200, one skinned knuckle, 6 days from start to finish (including an hour to remove and 30 minutes to reinstall).

The thrill is back!!!
........now about that cupholder........