Can MEM_CAL be cause for no codes???
Thread Starter
Burning Brakes
Joined: Feb 2001
Posts: 769
Likes: 0
From: Granbury TX
Can MEM_CAL be cause for no codes???
I have been unable to get a datalog from my 87 L98. I looked to see if I had codes and noticed I had no SES light at all. I spent most of the day disassembeling the dash cleaning contacts,and replacing light bulbs and finally succeded in getting the SES light with the Ign turned on. Again, trying to check for codes, the SES light would not flash at all. Not even a 12 code. I went through the A-2 diagnostic chart in my service manual and arrived at a block which sudgests the memcal is possiably installed wrong, or is defective.
I have a Moates GU1 with a chip that has worked in the past. The original mem-cal is riding sidesadle. As I recall, the Moates Adapter is not keyed to the old mem-cal. It could be backword I guess. HAs anyone heard of this problem before?? Another possiability is a bad connection at the ECM connectors. How does one check these connectors to determin they are in fact, connected?
I have a Moates GU1 with a chip that has worked in the past. The original mem-cal is riding sidesadle. As I recall, the Moates Adapter is not keyed to the old mem-cal. It could be backword I guess. HAs anyone heard of this problem before?? Another possiability is a bad connection at the ECM connectors. How does one check these connectors to determin they are in fact, connected?
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Originally Posted by Strike3
I have been unable to get a datalog from my 87 L98. I looked to see if I had codes and noticed I had no SES light at all. I spent most of the day disassembeling the dash cleaning contacts,and replacing light bulbs and finally succeded in getting the SES light with the Ign turned on. Again, trying to check for codes, the SES light would not flash at all. Not even a 12 code. I went through the A-2 diagnostic chart in my service manual and arrived at a block which sudgests the memcal is possiably installed wrong, or is defective.
I have a Moates GU1 with a chip that has worked in the past. The original mem-cal is riding sidesadle. As I recall, the Moates Adapter is not keyed to the old mem-cal. It could be backword I guess. HAs anyone heard of this problem before?? Another possiability is a bad connection at the ECM connectors. How does one check these connectors to determin they are in fact, connected?
I have a Moates GU1 with a chip that has worked in the past. The original mem-cal is riding sidesadle. As I recall, the Moates Adapter is not keyed to the old mem-cal. It could be backword I guess. HAs anyone heard of this problem before?? Another possiability is a bad connection at the ECM connectors. How does one check these connectors to determin they are in fact, connected?
If you are using a Moates adapter the car will run terrible if the adapater and the prom are inserted incorrectly. Also with the Moates adapter the OE memcal needs to be plugged in onto the adapter board. With the OE memcal attached the adapter and the memcal can only go into the ECM one way. If your ECM is not flashing 12 try removing the chip and adapter completely and turn the ignition on, that should set a prom error fault which is something like code 51 or 52
Thread Starter
Burning Brakes
Joined: Feb 2001
Posts: 769
Likes: 0
From: Granbury TX
Can I hurt my ECM by probing with an ohm meter?
I removed the memcal from the ECM and shorted A to B at the ALDL, turned on the key, and it made no difference. That is, the SES light stayed on steady. No flashing at all. All tracing and trobule shooting flow charts now seem to point to the connectors at the ecm but I'm don't know if I can damage anything by probing all the contacts.
I removed the memcal from the ECM and shorted A to B at the ALDL, turned on the key, and it made no difference. That is, the SES light stayed on steady. No flashing at all. All tracing and trobule shooting flow charts now seem to point to the connectors at the ecm but I'm don't know if I can damage anything by probing all the contacts.
Last edited by Strike3; Jan 30, 2006 at 08:17 AM.
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Originally Posted by Strike3
Can I hurt my ECM by probing with an ohm meter?
I removed the memcal from the ECM and shorted A to B at the ALDL, turned on the key, and it made no difference. That is, the SES light stayed on steady. No flashing at all. All tracing and trobule shooting flow charts now seem to point to the connectors at the ecm but I'm don't know if I can damage anything by probing all the contacts.
I removed the memcal from the ECM and shorted A to B at the ALDL, turned on the key, and it made no difference. That is, the SES light stayed on steady. No flashing at all. All tracing and trobule shooting flow charts now seem to point to the connectors at the ecm but I'm don't know if I can damage anything by probing all the contacts.
