SYSTEM DESCRIPTION
Front air control controls A/C compressor operation by ambient temperature and signal from ECM.
Low Temperature Protection Control
Front air control will turn the A/C compressor ON or OFF as determined by a signal detected by ambient sensor.
When ambient temperature is greater than -2°C (28°F) , the A/C compressor turns ON. The A/C compressor turns OFF when ambient temperature is less than -5°C (23°F) .
MAGNET CLUTCH
Diagnosis Procedure
DIAGNOSIS PROCEDURE FOR MAGNET CLUTCH
SYMPTOM: Magnet clutch does not engage when A/C switch is ON.
1.CHECK POWER SUPPLY FOR A/C COMPRESSOR
Disconnect A/C compressor connector.
Start engine and press A/C switch.
Check voltage between A/C compressor harness connector F3 terminal 1 and ground.
Is the Inspection result normal?
YES >> Check magnet clutch coil.
If OK, check A/C compressor mounting points for looseness or corrosion and repair as necessary. NO >> GO TO 2
2.CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY IN IPDM E/R AND A/C COMPRESSOR
Disconnect IPDM E/R connector F10 and A/C compressor connector F3.
Check continuity between A/C compressor harness connector F3 (A) terminal 1 and IPDM E/R harness connector F10 (B) terminal 48.
If OK, check harness for short to ground.
Is the Inspection result normal?
YES >> GO TO 3
NO >> Repair harness or connector. 3.CHECK FUSE IN IPDM E/R
Check 10A fuse (No. 41 located in the IPDM E/R).
Is the Inspection result normal?
YES >> GO TO 4
NO >> Replace fuse and check IPDM E/R for short circuit. Replace if necessary. 4.CHECK A/C COMPRESSOR ON SIGNAL
Check voltage between front air control connector M37 terminal 5 and ground, with A/C compressor ON and with A/C compressor
OFF.
Is the Inspection result normal?
YES >> GO TO 5
NO >>