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It just got worse. Yesterday after reinstalling the used SAM, now in addition to no crank, now the windows won't work, there is no longer power on pin 30 for the engine relay. Also, now my scanner won't communicate with the ECU.
I have removed and tested all relays from all 3 fuse panels. All are good. I tested all fuses in all 3 fuse boxes, all good. Installed another SAM (r. frt.) 032 545 83 32 (newer part number.) Still no instruments no crank. It's just dead. Battery 100% charged.
I just went outside and with the key in the ignition, the instrument lights were back on. A few seconds after I pulled the key out, the lights went out, but when I put the key back in the ignition switch the lights did not come back on-just grimlins, I guess.
Still, no crank. Now I suspect the CAS but I don't know how to trouble shoot it. Still unable to get my scanner to communicate with the ECU.
Last edited by Lawsonsbarn; 08-20-2024 at 09:49 PM.
To the person who posted the ignition wiring circuit for the W220, will you please post it again. I can't find that thread-it just vanished before I could print it out.
In trying to troubleshoot the EIS, I removed the instrument panel and probed the 10 guage red wire and found that it did not have voltage (battery v). Does anyone know where it receives power from?
You didn't tell us much about your S430. If it is 2003 or later, the instrument fuses are in the "hidden fuse box in the right end of the dash, behind the sorta triangular pop-out cover.
I second tusabes post about the floor-mounted fuses and connections.
It is a 2000 S430. I have checked for power at the right floor connector. I have power on all connections. I also ohmed it out to be sure that they all had continuity among them and they do. I did look at the under the dash covers at both ends and there are no fuse panels there. I just need to find out how the ignition switch wire (red 10 guage) is powered for there is no power there.
Well, when I tested the fuses under the right front carpet, the 60 amp fuse is bad. So that's supplies the EIS with power. It was very difficult to remove the connector plate-it was really stuck, possibly due to the high resistance causing it partially to melt. I took it to my vise and using a hammer and punch, I finally was able to separate it and remove the fuse. Hopefully this will help someone else in the future. Thanks again to all who assisted me in this!
Last edited by Lawsonsbarn; 08-26-2024 at 07:20 PM.
Reason: Left out the pass it on
Yes that did restore power to the EIS. I also went ahead and replaced the 150A fuse. Now I still have no crank. Before I replaced the fuse I could not communicate with the ECU (ME) unit. Now after replacing the fuse I can scan again. I'm getting TCU ESG codes. Does anyone know where this is located. The parts (EPC) cat shows it in the right SAM box. But it's not there. Neither is it in the left SAM box. I removed the front cowling thinking that it might be there-nope! Has anyone else seen this?
Last edited by Lawsonsbarn; 09-05-2024 at 07:51 PM.
Did this car ever run normally since you’ve had it or did you buy it broken ?
The easiest way to troubleshoot this is to buy a match, set of key, ignition switch, shifter, and ECU. They must all come from the same car as there are coded to work together. They sell matched sets on eBay, if they don’t work to fix your problem, you can return it or relist it for sale on eBay as these are high demand. Match set sell for about $350 on eBay.
I'm just simply trying to locate the TCU (ESG) for testing. It's not in the location shown in the EPC, nor in the service literature. Anyone else know where else they would have stuck it? The codes point to this as being the culprit and I can't communicate with it with my scanner.
It's not my car, it belongs to a neighbor and I don't intend spending that kind of money when I can probably clean the transmission fluid off it and repair the car.
Tcu will not cause a no start . The Tcu becoming flooded with fluid is a separate issue . Tcu is located the the black plastic boxes in the engine compartment
the electronic gear selector (egs) will cause a no start , as it’s one of the 4 anti theft parts. That’s the shifter
again unless your neighbor is willing to buy the 4 part matched set there’s nothing to help them
I agree with tusabes - TCU will not cause a no-start, only shifting problems. It is a black plastic box, about the size of a pack of cigarettes, and IS in the right front SAM. Remember that left/right are always from the standpoint of the seated operator.
I've traced the problem down to terminal 85 of the starter relay plug is not getting a ground. Does anyone know where that ground signal comes from? That's one problem.
I also have some codes: N1112; C1504-009; C1022-18; P1570; P1580 This the right SAM box.
Last edited by Lawsonsbarn; 09-06-2024 at 01:42 PM.
Reason: More info
OK again please answer the question I asked before, when I asked if this is a car that has, for you or your neighbor , ever run correctly. You stated your neighbor got the car, did it ever run correctly for your neighbor? Or did they buy it as a non-running project? Did they have anyone work on it? Who might’ve removed the TCU?
He has owned the car for several years and it was running fine until he went out to crank it one day and it would not crank. I have determined that the problem must be the ME because it is not sending a ground signal to the # 85 pin for starter relay.
I've had to clean or replace a number of these through the years and almost without exception they were located in the right box. But not this one. If someone had removed it there would be harness plugs there where it would be and there are none except for the ME and SAM.
Last edited by Lawsonsbarn; 09-07-2024 at 02:21 PM.
Reason: More info
I can not communicate with the TCU with my scanner tool. DAS is working in the ME and the shifter. So, I suspect that the DAS feature is not working in it. No DAS no crank, right?
08-17-2024, 06:15 PM
