Owner's Manual

TROUBLE DIAGNOSIS

MTC-43

MTC

Revision: March 2005 2005 Altima

1. CHECK POWER SUPPLY CIRCUIT FOR FRONT AIR CONTROL

1. Disconnect front air control connector M49.

2. Turn ignition switch ON.

3. Check voltage between front air control connector M49 termi-

nals 1 (G), 2 (Y/R), and 20 (W/L), and ground.

OK or NG

OK >> GO TO 2.

NG >> Check the following.

● 10A fuse [Nos. 12 and 19, located in the fuse block (J/B)] and 15A fuses [Nos. 10 and 11,

located in the fuse block (J/B)].

● If fuses are OK, check for open circuit in wiring harness. Repair or replace as necessary.

● If fuses are NG, replace fuse and check wiring harness for short circuit. Repair or replace as

necessary.

2. CHECK BODY GROUND CIRCUIT FOR FRONT AIR CONTROL

1. Turn ignition switch OFF.

2. Check continuity between front air control connector M49 termi-

nal 3 (B) and ground.

OK or NG

OK >> ● Replace front air control. Refer to MTC-76, "FRONT

AIR CONTROL" .

● Inspection End.

NG >> Repair or replace harness.

Terminals

Voltage (V)

(Approx.)

(+) (-)

Connector - Terminal Wire colors

Body ground 12V

M49-1 G

M49-2 Y/R

M49-20 W/L

WJIA1192E

Terminal

Continuity

(+) (-)

Connector - Terminal Wire colors

Body ground Yes

M49-3 B

WJIA1186E