Cadillac Repair: A/C Compressor, cadillac sts, code combinations

Question
QUESTION: I have a 1994 Cadillac STS and I am getting a message that the A/C Compressor is off, and that they freon is low. I have recharged the freon and the A/C Compressor still reads that it is off. How do I reset the compressor? Thanks much
ANSWER: What fault CODES are stored in the computer ?.

1. Ignition ON.

2. Simultaneously push and hold the OFF and warmer buttons on the climate control panel for 3 seconds and release them.

3. Diagnostic LETTER/NUMBER CODE combinations will appear displaying HISTORY or CURRENT below each LETTER/NUMBER combination.

4. Tell me what codes you get and if they are current or history.

5. Turn OFF ignition.

---------- FOLLOW-UP ----------

QUESTION: ok codes as followed

NO PCM Code
NO IPC Code
A047 CURRENT
NO SIR Code
T033 CURRENT
S036 HISTORY
S038 HISTORY
S044 HISTORY
S061 HISTORY
PCM?


Answer
You need to CLEAR all the codes from the computer.

To clear the A047 code:

1. Re-enter diagnostics until you see PCM?

2. Keep pushing and releasing the LO button until you see ACP?

3. Push and release the HI button and you will see ACP DATA?

4. Keep pushing and releasing the LO button until you see ACP CLEAR CODES?

5. Push and release the HI button and you will see ACP CODES CLEAR.

6. Wait 3 seconds and turn the ignition OFF.



To CLEAR the T0 codes:

1. Re-enter diagnostics until you see PCM?

2. Keep pushing the LO button until you see TCS?

3. Push and release the HI button and you will see TCS DATA?

4. Keep pushing and releasing the LO button until you see TCS CLEAR CODES?

5. Push and release the HI button and you will see TCS CODES CLEAR.

6. Wait 3 seconds and turn the ignition OFF.



To CLEAR the S0 codes:

1. Re-enter diagnostics until you see PCM?

2. Keep pushing the LO button until you see RSS?

3. Push and release the HI button and you will see RSS DATA?

4. Keep pushing and releasing the LO button until you see RSS CLEAR CODES?

5. Push and release the HI button and you will see RSS CODES CLEAR.

6. Wait 3 seconds and turn the ignition OFF.


Wait 3 minutes and then see if any codes return by re-entering diagnostics via OFF WARMER.

Your AC should work IF you have enough freon in it.


If you still get A047 CURRENT you will have to add additional freon by jumpering the AC relay.

Afetr you add freon, RE-CLEAR the A0 code per above.

As long as the A047 appears as CURRENT the AC will not engage.