A/C Control Signal (ACCS) Diagnosis (DTC P1464): Notes

DTC P1464 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P1464	A/C CONTROL SIGNAL (ACCS) MALFUNCTION
DETECTION CONDITION	P1464 indicates that the ACCS input to the powertrain control module (PCM) was high during the self-test.
POSSIBLE CAUSE	A/C was on during self-test A/C clutch PWR circuit short to power Short to power on ACCS circuit Damaged A/C demand switch Damaged A/C clutch relay Damaged PCM
HINT	ACCS Description  When the A/C cycling switch opens, the PCM will turn off the A/C clutch. The A/C cycling switch circuit to the PCM provides a voltage signal which indicates when the A/C is requested. When the A/C demand switch is turned on, and both the A/C cycling switch and the high pressure contacts of the A/C high pressure switch are closed, voltage is supplied to the ACCS circuit at the PCM. If the ACCS signal is not received by the PCM, the PCM will not allow the A/C to operate.
Courtesy of MAZDA MOTORS CORP.
Courtesy of MAZDA MOTORS CORP.
Courtesy of MAZDA MOTORS CORP.