05 es330 no comm with scanner, new ecu no open or shorts at dlc and all power and ground circuts ok at ecm?

Have it checked for DTC'S -diagnostic trouble codes . That will tell you what's up . Dealer or someother qualified repair shop .
DTC P0532: Air Conditioning A/C Refrigerant Pressure Sensor Circuit Low Voltage
DTC P0533: Air Conditioning A/C Refrigerant Pressure Sensor Circuit High Voltage
DTC P0645: A/C Clutch Relay Control Circuit
Circuit System Description
When the A/C switch is pressed, the HVAC control module sends a serial data message to the ECM. This input will request the engine control module (ECM) to ground the A/C compressor clutch relay control circuit, which will switch the A/C CMPRSR CLUTCH relay on. With the relay contacts closed, battery voltage is supplied to the A/C compressor clutch assembly.

DTC B0228 02 : Recirculate Position Feedback Circuit Short to Ground
DTC B0228 05 : Recirculate Position Feedback Circuit Short to Battery or Open
DTC B0228 61 : Recirculate Position Circuit Actuator Stuck
DTC B0413 02 : Temperature Control 1 Feedback Circuit Short to Ground
DTC B0413 05 : Temperature Control 1 Feedback Circuit Short to Battery or Open
DTC B0413 61 : Temperature Control 1 Feedback Circuit Actuator Stuck Open
DTC B0423 02 : Temperature Control 2 Feedback Circuit Short to Ground
DTC B0423 05 : Temperature Control 2 Feedback Circuit Short to Battery or Open
DTC B0423 61 : Temperature Control 2 Circuit Actuator Stuck

CODE --52 -- Back-up fuel cal-pack missing

Cadiallac Brougham Codes

Check fuse in under hood fuse box .Odd coils 15amp . This fuse powers both fuel injectors an coils on that bank.
The control module enables the appropriate fuel injector on the intake stroke for each cylinder. Ignition voltage is supplied directly to the fuel injectors. The control module controls each fuel injector by grounding the control circuit with a solid state device called a driver. The control module monitors the status of each driver. Each driver has a feedback voltage circuit which the engine control module (ECM) monitors. The injector control circuits are pulled-up to voltage within the ECM . The ECM can determine if a control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage. If the ECM detects the control circuit voltage is too low when the circuit is commanded OFF, this DTC sets.
Shorted injector's ? Go on you tube an check out videos on testing GM injectors by scanner Danner . He teaches automotive training classes .
Injector Circuit Wiring Diagram

Well if you've had your ECM burn and got it changed and the same thing happen again then there might be a pilled positive wire exposed to the body or the chassis of your car touching at some point,my best advice is to trace all positive heavy wires leading from the starter and under the fuse board as well.i hope this helps thanks

the only clue here (above ) is one word. "ERROR" elaborate please.?
all it says is reading, then error.
is the tool dead, is the tool showing COMM fails is the tool showing
failure to connect?????????????
IF yes, you lost 12vdc power to the ECM... FOR SURE.
it cant talk to you with zero power, no ECU can. ever.

1. so dead battery,?? not 12.6vdc rested is low or dead.
2. test the fuse to ECM. use a voltmeter at each ECM fuse, must be 12v on both sides, if not the fuse is blown, some look good but are in fact quite bad.
3. the DLC OBD2 16pin connector on the dash must have 12vdc on pin 16, or THE FUSE IS BLOWN, FOR SURE>
4. see bottom of below page for where is pin 16
5. http://www.fixkick.com/CEL/DLC/DiagJump.html
6. using a 1995 scan tool in any 2000 car can in fact fail. use a modern tool, not relics from long past.
7. get the scan too to work first. or go broke, buying ECMs./
8. 99.9% of all dead ECU scanner dead is blown fuse. cept #6
9. this is a very simple problem , use a volt meter to find it. $10 at walfart and bam , a meter.
10. the can tool needs to have the key on to scan and if you crank
11. the ecu will show errors cranking and all scan tools see those.
12. the ecu/ecm will show bad spark ,bad cmp sensors or bad ckp sensors. this is key facts to get engine to start.

tell me exact brand and model of your scan too, i tell you if it works.

What mechanics ? No codes stored in driver door module or power seat module ? Or don't these mechanics know about that ?
Did you try the dealer ?
Diagnostic Trouble Code (DTC) Chart DTC Description Source Action B1201 Fuel Sender Circuit Failure HEC Module REFER to Section 413-01 . B1204 Fuel Sender Circuit Short to Ground HEC Module REFER to Section 413-01 . B1205 Failure (Open or Short to Battery) HEC Module REFER to Section 413-08 . B1208 HEC Switch-1 Assembly Circuit Short to Ground HEC Module REFER to Section 413-08 . B1213 PATS Number of Programmed Keys is Below Minimum HEC Module REFER to Section 419-01 . B1231 Longitudinal Acceleration Threshold Exceeded RCM REFER to Section 501-20B . B1232 PATS Bad Diagnostic Byte Received HEC Module REFER to Section 419-01 . B1249 Blend Door Failure EATC Module REFER to Section 412-00 . B1251 Climate Control Air Temperature Internal Sensor Circuit Open EATC Module REFER to Section 412-00 . B1253 Climate Control Air Temperature Internal Sensor Circuit Short to Ground EATC Module REFER to Section 412-00 . B1255 Climate Control Air Temperature External Sensor Circuit Short to Battery EATC Module REFER to Section 412-00 . B1257 Climate Control Air Temperature External Sensor Circuit Short to Ground EATC Module REFER to Section 412-00 . B1261 Climate Control Solar Radiation Sensor Circuit Short to Ground EATC Module REFER to Section 412-00 . B1312 Headlamp Input Circuit Short to Battery LCM REFER to Section 417-01 . B1317 Battery Voltage High HEC Module REFER to Section 414-00 . B1317 Battery Voltage High RCM REFER to Section 414-00 . B1317 Battery Voltage High Air Suspension Module REFER to Section 204-05 . B1318 Battery Voltage Low HEC Module REFER to Section 414-00 . B1318 Low Ignition Voltage During Speed Control Operation NGSC Module REFER to Section 310-03 . B1318 Battery Voltage Low Air Suspension Module REFER to Section 204-05 . B1318 Battery Voltage Low RCM REFER to Section 414-00 . B1322 Door Ajar LF Short to Ground DDM REFER to Section 501-14B . B1334 Decklid Ajar Rear Door Circuit Short to Ground LCM REFER to Section 501-14B . B1340 Chime Input Request Circuit Short to Ground LCM REFER to Section 501-20B . B1342 ECU is Defective ABS Module CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new ABS Module. REFER to Section 206-09 . CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective ACM CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new ACM. REFER to Section 415-01 . CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective CPM CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new CPM. REFER to Section 419-08 . CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective DDM CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new DDM. REFER to Section 419-10 . CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective DSM CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new DSM. REFER to Section 419-10 . CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective HEC Module CLEAR and DOCUMENT the DTCs. PERFORM the HEC self-test. If DTC B1342 is retrieved, INSTALL a new HEC Module. REFER to Section 413-01 . CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective LCM CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new LCM. REFER to Module-Lighting Control (LCM) in this section. CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective NGSC Module CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new NGSC Module. REFER to Section 310-03 . CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective Air Suspension Module CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new air suspension module. REFER to Module-Air Suspension in this section. CLEAR the DTCs. REPEAT the self-test. B1342 ECU is Defective RCM REFER to Section 501-20B . B1352 Ignition Key-In Circuit Failure LCM REFER to Section 413-09 . B1359 Ignition RUN/ACCY Circuit Failure LCM REFER to Section 211-05 . B1396 Power Door Lock Circuit Short to Battery DDM REFER to Section 501-14B . B1397 Power Door Unlock Circuit Short to Battery DDM REFER to Section 501-14B . B1402 Driver Power Window Down Circuit Failure DDM REFER to Section 501-11 . B1445 Door Handle Circuit Short to Ground DDM REFER to Section 501-14B . B1446 Wiper PARK Sense Circuit Failure LCM REFER to Section 501-16 . B1484 Brake Pedal Input Open Circuit ABS Module REFER to Section 206-09 . B1485 Brake Pedal Input Circuit Short to Battery LCM REFER to Section 417-01 . B1526 Keyless Entry Circuit Short to Ground DDM REFER to Section 501-14B . B1529 Memory Set Switch Circuit Short to Battery DDM REFER to Section 501-09 . B1533 Memory Position No. 1 Switch Circuit Short to Battery DDM REFER to Section 501-09 . B1537 Memory Position No. 2 Switch Circuit Short to Battery DDM REFER to Section 501-09 . B1545 Seat Direction Switch Assembly Circuit Short to Battery DDM REFER to Section 501-10 . B1549 Power Window Master Circuit Short to Battery DDM REFER to Section 501-11 . B1553 Decklid Release Circuit Short To Battery DDM REFER to Section 501-14B . B1555 RUN/START Input Circuit Failure LCM REFER to Section 211-05 . B1556 RF, LR, RR Door Ajar Circuits Short to Ground DDM REFER to Section 501-14B . B1569 Headlamp High Beam Circuit Short to Battery LCM REFER to Section 417-01 . B1577 Parking Lamp Input Short to Battery LCM REFER to Section 417-01 . B1581 Panel Dim Increase Input Circuit Short to Battery LCM REFER to Section 413-00 . B1585 Panel Dim Decrease Input Circuit Short to Ground LCM REFER to Section 413-00 . B1600 PATS Key Problem - No Key Code HEC Module REFER to Section 419-01 . B1601 PATS Received Non-Programmed Key Code HEC Module REFER to Section 419-01 . B1602 PATS Received Invalid Key Code Format HEC Module REFER to Section 419-01 . B1663 Driver Seat Front Up/Down Motor Stalled DSM REFER to Section 501-10 . B1664 Driver Seat Rear Up/Down Motor Stalled DSM REFER to Section 501-10 . B1665 Driver Seat Forward Backward Motor Stalled DSM REFER to Section 501-10 . B1666 Driver Seat Fwd/Bwd Recline Motor Stalled DSM REFER to Section 501-10 .
Also do there know anything about serial data bus ?
Plus , do they know what voltage drop testing a electrical circuit is . I should find better mechanics .

What do you mean "can't find code"? If the check engine light is on, there is a fault code stored in your onboard computer - that's the way it works. If you are using a generic OBD code reader, that is most likely the reason you cannot find any codes. You need to use a scanner that has the correct software to access your ENTIRE computer network, not just the "continuous memory" or "generic" side of your computer system.

The window problem is a seperate problem and must be diagnosed accordingly.

HAVE VECHICLE HOOK TO CODE SCANNER WHILE OPERATING THE THROTTLE POSITION SENSOR.WITH CODE SCANNER HOOKED UP IN VECHICLE WHILE WATCHING TPS SENSOR VOLTAGE VARATION WITH TPS SENSOR CLOSED VOLTS ON SCANNER SHOULD BE 0.2 TO 0.8 VOLTS TPS SENSOR CLOSED AS YOU PRESS ACCELERATOR PEDAL TPS SENSOR VOLTS SHOULD INCREASE TO 4.3 - 4.8 VOLTS WIDE OPEN THROTTLE IF VOLTS DONT CHANGE WHILE PRESSING ACCELERATOR PEDAL EITHER TPS SENSOR WIRING IS OPEN OR SHORTED TO GROUND OR THE ECM FAILED.

DTC 63 Will Set When
No voltage is supplied by the ECM through the EST “B” line while reference pulses are received by the ECM from the crankshaft position sensor
check white wire terminal B on ignition coil to ECM terminal C14 for open circuit or short to ground while disconnected if thats ok check for voltage signal at B while cranking no signal ECU faulty. voltage signal also on A terminal while cranking and check earth terminal C to body no higher than 5 Ohms
power is terminal D 12V
if getting power, earths good, and both signal voltages are going into coil pack, coil pack is faulty.

The problem is not 100% solved. I have figured out that the problem is in the ground circut for the "Body ECU" system. The only circut effectfed is the door, ignition switch ilumination. If a ground is forced to the circut it works oK.
What I need is a diagram of the internal workings of the "body ECU". I have not yet removed it but it can be much more than a bunch of relays. By the way tell the guy with SD22 Nissan to search SD22. The sole distributor for that product is located in SanFran.