Owner's Manual

MTC-62

TROUBLE DIAGNOSIS

Revision: March 2005 2005 Altima

6. CHECK REFRIGERANT PRESSURE SENSOR

Refer to MTC-62, "

Refrigerant Pressure Sensor" .

OK or NG

OK >> GO TO 7.

NG >> Replace refrigerant pressure sensor. Refer to MTC-99, "

Removal and Installation for Refrigerant

Pressure Sensor"

7. CHECK COMPRESSOR ON SIGNAL

Check voltage between front air control connector M49 terminal 4

(G/Y) and ground, with A/C compressor ON and with A/C compres-

sor OFF.

OK or NG

OK >> GO TO 8.

NG >>

● When compressor is ON and voltage is not approx. 0V, Replace front air control. Refer to MTC-

76, "Removal and Installation" .

● When compressor is OFF and voltage is not approx. 5V, BCM is malfunctioning.

8. CHECK CAN COMMUNICATION CIRCUITS

Check CAN communication circuits between BCM to ECM and between ECM to IPDM E/R. Refer to LAN-21,

"CAN COMMUNICATION" .

OK or NG

OK >> ECM malfunctioning.

NG >> Repair or replace component based on the result of diagnosis.

COMPONENT INSPECTION

Refrigerant Pressure Sensor

The refrigerant pressure sensor is attached to the condenser.

● Refer to MTC-17, "Refrigerant pressure sensor" .

Terminal

Voltage (V)

(Approx.)

(+) (-)

Connector - Terminal Wire color

Body ground

Compressor ON:

Compressor OFF:

M49-4 G/Y

WJIA0859E

BBIA0027E