With Monochrome Display

MAGNET CLUTCH


Description


SYSTEM DESCRIPTION
A/C auto amp. controls A/C compressor operation by ambient temperature and signal from ECM.

Low Temperature Protection Control





A/C auto amp. will turn the A/C compressor ON or OFF as determined by a signal detected by ambient sensor.
When ambient temperature is greater than 4�C (39�F), the A/C compressor turns ON. The A/C compressor turns OFF when ambient temperature is less than 2.5�C (37�F).




MAGNET CLUTCH


Diagnosis Procedure

Regarding Wiring Diagram information, With Monochrome Display.





SYMPTOM: Magnet clutch does not engage when A/C switch is ON.
1.INSPECTION IN AUTO ACTIVE TEST MODE
Perform "AUTO ACTIVE TEST". Diagnosis Description.
Does it operate normally?
YES - GO TO 6.
NO - GO TO 2.
2.CHECK POWER SUPPLY FOR A/C COMPRESSOR





1. Turn ignition switch OFF.
2. Disconnect A/C compressor connector.
3. Start engine and press A/C switch.
4. Check voltage between A/C compressor harness connector F3 terminal 1 and ground.





Is the inspection result normal?
YES - Check magnet clutch coil.
1. If NG, replace magnet clutch. Service and Repair.
2. If OK, check A/C compressor mounting points for looseness or corrosion and repair as necessary.
NO - GO TO 3
3.CHECK FUSE
Check 10A fuse (No. 41) located in IPDM E/R.

NOTE:
Connector Views for fuse location.
Is the inspection result normal?
YES - GO TO 4.
NO - GO TO 5.
4.CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY IN IPDM E/R AND A/C COMPRESSOR
1. Turn ignition switch ON.





2. Disconnect IPDM E/R connector F10 and A/C compressor connector F3.
3. Check continuity between A/C compressor harness connector
F3 (A) terminal 1 and IPDM E/R harness connector F10 (B) terminal 48.

1 - 48 : Continuity should exist.

Is the inspection result normal?
YES - Replace A/C Relay.
NO - Repair harness or connector.
5.CHECK A/C COMPRESSOR CIRCUIT FOR SHORT





Check continuity between A/C compressor harness connector F3 terminal 1 and ground.

1 - Ground : Continuity should not exist.

Is the inspection result normal?
YES - Replace IPDM E/R. Service and Repair.
NO - Repair harness or connector.
6.CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1. Using CONSULT-III, perform "SELF-DIAGNOSIS RESULTS" of HVAC.
2. Check if any DTC No. is displayed in the self-diagnosis results.

NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. With Monochrome Display or With Monochrome Display.
Is any DTC No. displayed?
YES - Perform diagnosis for the applicable DTC. Testing and Inspection.
NO - GO TO 7.
7.CHECK A/C AUTO AMP. INPUT SIGNAL
Using CONSULT-III, check "On/Off" of "COMP REQ SIG" and "FAN REQ SIG" in "DATA MONITOR" of HVAC. With Monochrome Display.





Is the inspection result normal?
YES - GO TO 8.
NO - Replace A/C auto amp. With Monochrome Display.
8.CHECK REFRIGERANT PRESSURE SENSOR
Check refrigerant pressure sensor. Component Function Check.
Is the inspection result normal?
YES - Inspection End.
NO - Repair or replace malfunctioning parts.