Owner's Manual

TROUBLE DIAGNOSIS
MTC-61
C
D
E
F
G
H
I
K
L
M
A
B
MTC
Revision: March 2005 2005 Altima
2. CHECK POWER SUPPLY FOR COMPRESSOR
1. Reconnect IPDM E/R harness connectors.
2. Start engine and press A/C switch.
3. Check voltage between compressor harness connector F3 ter-
minal 1 (Y/B) and ground.
OK or NG
OK >> Check magnet clutch coil.
1. If NG, replace magnet clutch. Refer to MTC-94, "
Removal and Installation for Compressor
Clutch" .
2. If OK, check compressor mounting points for looseness or corrosion and repair as necessary.
NG >> GO TO 3.
3. CHECK FUSE IN IPDM E/R
Check 10A fuse [No. 33 located at the IPDM E/R].
OK or NG
OK >> GO TO 4.
NG >> Replace fuse and check IPDM E/R for short circuit. Replace if necessary.
4. CHECK CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL
1. Disconnect BCM connector M18 and front air control connector M49.
2. Check continuity between BCM harness connector M18 termi-
nals 27 (G/Y), 28 (L/W) and front air control connector M49 ter-
minals 4 (G/Y), 19 (L/W).
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.
5. CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL
Check voltage between ECM harness connector F54 terminal 70
(W) and ground.
OK or NG
OK >> GO TO 6.
NG >> 1. Repair harness or connector.
2. Confirm that magnet clutch operation is normal.
Terminal
Voltage (V)
(Approx.)
(+) (-)
Connector - Terminal Wire color
Body ground 12V
F3-1 Y/B
WJIA1193E
Terminals Continuity
Connector -
Terminal
Wire color
Connector -
Terminal
Wire color
Yes
M18-27 G/Y M49-4 G/Y
M18-28 L/W M49-19 L/W
WJIA1201E
Terminal
Voltage (V)
(Approx.)
(+) (-)
Connector - Terminal Wire color
Body ground 12V
F54-70 W
WJIA0748E