You should double check your codes and pin numbers. There is no pin 16, and if there was there wouldn't be a code number as high as 91. There is no code 15 on pin 23.

TIA for all reply's and advice.

We do use premium gas from Sunoco 93 octane. Will verify tonight what gear the MB is in when hard shifting.

M.B.DOC-
For problem on pin 3-code 6----Would a good start be on checking and adjusting the cable at the ETA? (Thanks for all your input so far)

Wbrian63-
For problem on pin 7, code 6---If The test steps 12.-12.1 were to be done...should a test harness need to be made to do this test with module in place? or disconnect neg battery and pull N4/1 and pin out per instructions? If different please explain. Being a newbie is hard. To understand ALLD... test procedures.

Will PM you on the How to pull the A/c codes. Seen on Jim’s page, and on ALLD… to pull a/c codes thru the a/c module, being a newbie always willing to learn from others when able to.

Will check Bowden cable, and modulator box.

deanyel
For pin 23, code 15---That’s what shows up every time.

Will keep this thread updated with any new info, or corrections.