2014 NISSAN TEANA ignition

HAC-78
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
A/C AUTO AMP.
A/C AUTO AMP. : Diagnosis ProcedureINFOID:0000000009463149
Regarding Wiring Diagram information, refer to
HAC-34, "Wiring Diagram".
1.CHECK FUSE
Check fuses [No. 14, 25 and 30, loca ted in the fuse block (J/B)].
NOTE:
Refer to PG-70, "Terminal Arrangement"
.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace the blown fuse after repairing the affected circuit.
2.CHECK A/C AUTO AMP. POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check voltage between A/C auto amp. harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector between A/C auto amp. and fuse block (J/B).
3.CHECK A/C AUTO AMP. GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between A/C auto amp. harness connector and ground.
Is the inspection result normal?
YES >> Inspection End.
NO >> Repair harness or connector.
AIR MIX DOOR MOTOR (DRIVER SIDE)
AIR MIX DOOR MOTOR (DRIVE R SIDE) : Diagnosis ProcedureINFOID:0000000009463150
Regarding Wiring Diagram information, refer to HAC-34, "Wiring Diagram".
+
− Vo l ta g e
A/C auto amp. Ignition switch position
Connector Terminal OFF ACC ON
M152 3
GroundBattery voltage Battery voltage Battery voltage
13 Approx. 0 V Battery voltage Battery voltage
23 Approx. 0 V Approx. 0 V Battery voltage
40 Approx. 0 V Approx. 0 V Battery voltage
A/C auto amp. —Continuity
Connector Terminal
M152 2
Ground Yes
22
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

POWER SUPPLY AND GROUND CIRCUITHAC-79
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
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1.CHECK AIR MIX DOOR MOTOR LH POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between air mix door motor LH harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK AIR MIX DOOR MOTOR LH GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect air mix door motor LH connector.
3. Check continuity between air mix door motor LH harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK INSTALLATION OF AIR MIX DOOR MOTOR LH
Check air mix door motor LH is properly installed. Refer to HAC-108, "Exploded View"
.
Is the inspection result normal?
YES >> Replace air mix door motor LH. Refer to HAC-109, "AIR MIX DOOR MOTOR : Removal and
Installation - Air Mix Door Motor (LH)".
NO >> Repair or replace malfunctioning part.
4.CHECK AIR MIX DOOR MOTOR LH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect air mix door motor LH connector and A/C auto amp. connector.
3. Check continuity between air mix door motor LH harness connector and A/C auto amp. harness connec-
tor.
Is the inspection result normal?
YES >> Replace A/C auto amp. Refer to HAC-102, "Removal and Installation".
NO >> Repair harness or connector.
AIR MIX DOOR MOTOR (PASSENGER SIDE)
AIR MIX DOOR MOTOR (PASSENGER SIDE) : Diagnosis ProcedureINFOID:0000000009463151
Regarding Wiring Diagram information, refer to HAC-34, "Wiring Diagram".
1.CHECK AIR MIX DOOR MOTOR RH POWER SUPPLY
1. Turn ignition switch ON.
+
−Vol tag e
(Approx.)
Air mix door motor LH
Connector Terminal M128 1 Ground Battery voltage
Air mix door motor LH —Continuity
Connector Terminal
M128 2 Ground Yes
Air mix door motor LH A/C auto amp. Continuity
Connector Terminal Connector Terminal
M128 1 M152 17 Yes
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

HAC-80
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
POWER SUPPLY AND GROUND CIRCUIT
2. Check voltage between air mix door motor RH harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK AIR MIX DOOR MOTOR RH GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect air mix door motor RH connector.
3. Check continuity between air mix door motor RH harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK INSTALLATION OF AIR MIX DOOR MOTOR RH
Check air mix door motor RH is properly installed. Refer to HAC-108, "Exploded View"
.
Is the inspection result normal?
YES >> Replace air mix door motor RH. Refer to HAC-109, "AIR MIX DOOR MOTOR : Removal and
Installation - Air Mix Door Motor (RH)".
NO >> Repair or replace malfunctioning part.
4.CHECK AIR MIX DOOR MOTOR RH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect air mix door motor RH connector and A/C auto amp. connector.
3. Check continuity between air mix door motor RH harness connector and A/C auto amp. harness connec-
tor.
Is the inspection result normal?
YES >> Replace A/C auto amp. Refer to HAC-102, "Removal and Installation".
NO >> Repair harness or connector.
MODE DOOR MOTOR
MODE DOOR MOTOR : Diagnosis ProcedureINFOID:0000000009463152
Regarding Wiring Diagram information, refer to HAC-34, "Wiring Diagram".
1.CHECK MODE DOOR MOTOR POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between mode door motor harness connector and ground.
+
−Voltage
(Approx.)
Air mix door motor RH
Connector Terminal M129 1 Ground Battery voltage
Air mix door motor RH —Continuity
Connector Terminal
M129 2 Ground Yes
Air mix door motor RH A/C auto amp. Continuity
Connector Terminal Connector Terminal
M129 1 M152 17 Yes
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

POWER SUPPLY AND GROUND CIRCUITHAC-81
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
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Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK MODE DOOR MOTOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect mode door motor connector.
3. Check continuity between mode door motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK INSTALLATION OF MODE DOOR MOTOR CONTROL LINKAGE
Check mode door motor control linkage is properly installed. Refer to HAC-108, "Exploded View"
.
Is the inspection result normal?
YES >> Replace mode door motor. Refer to HAC-109, "MODE DOOR MOTOR : Removal and Installa-
tion".
NO >> Repair or replace malfunctioning part.
4.CHECK MODE DOOR MOTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect mode door motor connector and A/C auto amp. connector.
3. Check continuity between mode door motor harne ss connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES >> Replace A/C auto amp. Refer to HAC-102, "Removal and Installation".
NO >> Repair harness or connector.
INTAKE DOOR MOTOR
INTAKE DOOR MOTOR : Diagnosis ProcedureINFOID:0000000009463153
Regarding Wiring Diagram information, refer to HAC-34, "Wiring Diagram".
1.CHECK INTAKE MODE DOOR MOTOR POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between intake mode door motor harness connector and ground.
+
−Vol tag e
(Approx.)
Mode door motor
Connector Terminal M127 1 Ground Battery voltage
Mode door motor —Continuity
Connector Terminal
M127 2 Ground Yes
Mode door motor A/C auto amp. Continuity
Connector Terminal Connector Terminal
M127 1 M152 17 Yes
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

HAC-82
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
POWER SUPPLY AND GROUND CIRCUIT
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK INTAKE MODE DOOR MOTOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect intake mode door motor connector.
3. Check continuity between intake mode door motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK INSTALLATION OF INTAKE MODE DOOR MOTOR
Check intake mode door motor is properly installed. Refer to HAC-108, "Exploded View"
.
Is the inspection result normal?
YES >> Replace intake mode door motor. Refer to HAC-109, "INTAKE DOOR MOTOR : Removal and
Installation".
NO >> Repair or replace malfunctioning part.
4.CHECK INTAKE MODE DOOR MOTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect intake mode door motor connector and A/C auto amp. connector.
3. Check continuity between intake mode door mo tor harness connector and A/C auto amp. harness con-
nector.
Is the inspection result normal?
YES >> Replace A/C auto amp. Refer to HAC-102, "Removal and Installation".
NO >> Repair harness or connector.
A/C SWITCH ASSEMBLY
A/C SWITCH ASSEMBLY : Co mponent Function CheckINFOID:0000000009463154
1.CHECK OPERATION
1. Press the AUTO switch, and then check t hat “AUTO” is shown on the display.
2. Operate the temperature control switch (driver side). Check that the fan speed or outlet changes. (The
discharge air temperature or fan speed varies depending on the ambient temperature, in-vehicle tempera-
ture, and temperature setting.)
Does it operate normally?
YES >> Inspection End.
NO >> Perform trouble diagnosis for the A/C switch assembly. Refer to HAC-83, "A/C SWITCH ASSEM-
BLY : Diagnosis Procedure".
+
−Voltage
(Approx.)
Intake mode door motor
Connector Terminal M126 1 Ground Battery voltage
Intake mode door motor —Continuity
Connector Terminal
M126 2 Ground Yes
Intake mode door motor A/C auto amp. Continuity
Connector Terminal Connector Terminal
M126 1 M152 17 Yes
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

POWER SUPPLY AND GROUND CIRCUITHAC-83
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
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A/C SWITCH ASSEMBLY : Diagnosis ProcedureINFOID:0000000009463155
Regarding Wiring Diagram information, refer to HAC-34, "Wiring Diagram".
1.CHECK A/C SWITCH ASSEMBLY POWER SUPPLY
1. Disconnect the A/C switch assembly connector.
2. Turn ignition switch ON.
3. Check voltage between A/C switch assembly harness connector M79 terminal 12 and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK FUSE
Check 10A fuse [No.30, located in the fuse block (J/B)].
NOTE:
Refer to PG-70, "Terminal Arrangement"
.
Is the inspection result normal?
YES >> Check harness for open circuit. Re pair or replace if necessary.
NO >> Check harness for short circuit. Repair or replace if necessary.
3.CHECK A/C SWITCH ASSEMBLY GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between A/C switch assemb ly harness connector M79 terminal 1 and ground.
Is the inspection result normal?
YES >> Replace the A/C switch assembly. Refer to HAC-101, "Removal and Installation".
NO >> Repair the harnesses or connectors.
(+) ( −)Voltage
A/C switch assembly —Ignition switch position
Connector Terminal OFF ACC ON
M79 12 Ground Approx. 0V Approx. 0V Battery
voltage
A/C switch assembly —Continuity
Connector Terminal
M79 1 Ground Yes
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

HAC-84
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
BLOWER MOTOR
BLOWER MOTOR
Diagnosis ProcedureINFOID:0000000009463156
Regarding Wiring Diagram information, refer to
HAC-34, "Wiring Diagram".
1.CHECK FUSE
1. Turn ignition switch OFF.
2. Check 15A fuses [Nos. 17 and 27, located in fuse block (J/B)].
NOTE:
Refer to PG-70, "Terminal Arrangement"
.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace the blown fuse after repairing the affected circuit.
2.CHECK BLOWER MOTOR POWER SUPPLY
1. Disconnect blower motor connector.
2. Turn ignition switch ON.
3. Check voltage between blower motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 6.
3.CHECK BLOWER MOTOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between blower motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair harness or connector.
4.CHECK BLOWER MOTOR CONTROL SIGNAL CIRCUIT
1. Disconnect A/C auto amp. connector.
2. Check continuity between blower motor harne ss connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair the harness or connector.
5.CHECK BLOWER MOTOR CONTROL SIGNAL
+
−Voltage
(Approx.)
Blower motor
Connector Terminal M31 38 Ground Battery voltage
Blower motor —Continuity
Connector Terminal
M31 39 Ground Yes
Blower motor A/C auto amp. Continuity
Connector Terminal Connector Terminal
M31 17 M152 18 Yes
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

BLOWER MOTORHAC-85
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
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1. Reconnect blower motor connector and A/C auto amp. connector.
2. Turn ignition switch ON.
3. Operate MODE switch to set air outlet to VENT.
4. Change fan speed from Lo to Hi, and check duty ratios between blower motor harness connector and
ground by using an oscilloscope.
NOTE:
Calculate drive signal duty ratio as shown in the figure.
T2 = Approx. 1.6 ms
Is the inspection result normal?
YES >> Replace blower motor. Refer to VTL-13, "BLOWER MOTOR : Removal and Installation".
NO >> Replace A/C auto amp. Refer to HAC-102, "Removal and Installation"
.
6.CHECK BLOWER MOTOR RELAY GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between fuse bl ock (J/B) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair harness or connector.
7.CHECK FRONT BLOWER MOTOR RELAY
Check front blower motor relay. Refer to HAC-85, "Component Inspection (Front Blower Motor Relay)"
.
Is the inspection result normal?
YES >> Repair harness or connector between blower motor and fuse block (J/B).
NO >> Replace front blower motor relay.
Component Inspection (Blower Motor)INFOID:0000000009463157
1.CHECK BLOWER MOTOR
1. Connect battery voltage to terminal 1 of blower motor.
2. Connect ground to terminal 2 of blower motor.
Does the blower fan operate?
YES >> Intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> Replace blower motor. Refer to VTL-13, "BLOWER MOTOR : Removal and Installation"
.
Component Inspection (Front Blower Motor Relay)INFOID:0000000009463158
1.CHECK BLOWER RELAY
1. Turn ignition switch OFF.
2. Remove front blower motor relay.
Blower motor Condition Duty ratio
(Approx.)
Connector Terminal Fan speed (manual)
VENT mode
M31 17 1st 25 %
2nd 33 % 3rd 41 %4th 51 %
5th 61 %
6th 69 %
7th 81 %
JPLIA1210GB
Fuse block (J/B) —Continuity
Connector Terminal
M4 13R Ground Yes
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM