Owner's Manual

MTC-74
TROUBLE DIAGNOSIS
Revision: March 2005 2005 Altima
1. CHECK INTAKE SENSOR CIRCUIT BETWEEN INTAKE SENSOR AND BODY GROUND
1. Disconnect intake sensor connector.
2. Turn ignition switch ON.
3. Check voltage between intake sensor connector M33 terminal 1
(R/W) and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
2. CHECK INTAKE SENSOR GROUND CIRCUIT BETWEEN INTAKE SENSOR AND FRONT AIR CON-
TROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector M50.
3. Check continuity between front air control connector M50 termi-
nal 24 (B/Y) and intake sensor harness connector M33 terminal
2 (B/Y).
If OK, check harness for short.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK INTAKE SENSOR
Refer to MTC-73, "
Intake Sensor" .
OK or NG
OK >> 1. Replace front air control. Refer to MTC-76, "Removal and Installation" .
2. Confirm system operation.
NG >> 1. Replace intake sensor.
2. Confirm system operation.
Terminal
Voltage (V)
(Approx.)
(+) (-)
Connector - Terminal Wire color
Body ground 5V
M33-1 R/W
WJIA0092E
Terminals Continuity
Connector -
Ter minal
Wire color
Connector -
Terminal
Wire color
Yes
M50-24 B/Y M33-2 B/Y
WJIA0873E