Code 69 - A/C Compressor Relay
When ECM detects A/C has been requested, ECM will activate the A/C clutch relay. When the relay has been activated, voltage should be present at both the A/C compressor clutch and the A/C clutch status line terminal of the ECM. If the ECM activates the A/C clutch relay but does not detect voltage present at the A/C status terminal for more than 10 seconds, Code 69 will set. An open or short to ground at any point in the A/C status circuit will cause Code 69 to set. A Code 69 fault will be stored in ECM memory but will not turn on the SERVICE ENGINE SOON light.
NOTE:
Test numbers refer to numbers on diagnostic chart.
- Code 69 will set if the ECM has commanded the A/C on and no voltage is detected on the A/C status line after 20 seconds.
- If the A/C compressor clutch operates properly and scan tester indicates A/C status off, then an open exists between the ECM and the splice to the compressor.