Nissan Maxima. Manual — part 718
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< DTC/CIRCUIT DIAGNOSIS >
[WITH COLOR DISPLAY]
B2636, B2637, B2638, B2639, B2654, B2655 MODE DOOR MOTOR
B2636, B2637, B2638, B2639, B2654, B2655 MODE DOOR MOTOR
Description
INFOID:0000000010050992
COMPONENT DESCRIPTION
Mode Door Motor
• The mode door motor (1) is attached to the heater & cooling unit
assembly.
• It rotates so that air is discharged from the outlet set by the A/C
auto amp. Motor rotation is conveyed to a link which activates the
mode door.
DTC Logic
INFOID:0000000010050993
DTC DETECTION LOGIC
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
.
DTC CONFIRMATION PROCEDURE
1.
CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT
1. Using CONSULT, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
2. Check if any DTC No. is displayed in the self-diagnosis results.
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
.
Is DTC No.“B2636”, “B2637”, “B2638”, “B2639”, “B2654” or “B2655” displayed?
YES
>> Perform trouble diagnosis for the mode door motor. Refer to
NO
>> GO TO 2.
2.
FUNCTION INSPECTION
1. Press MODE switch and DEF switch.
2. Each position indicator should change shape.
3. Confirm that air discharge comes out according to the air distribution table. Refer to
.
NOTE:
AWIIA0022ZZ
DTC
Items
(CONSULT screen terms)
Diagnostic item is detected when...
Possible cause
B2636
DR VENT DOOR FAIL
When the malfunctioning door position is
detected at VENT position
• Mode door motor
• A/C auto amp.
• Harness and connector
(CAN communication line is open
or shorted)
(Mode door motor is open or short-
ed)
B2637
DR B/L DOOR FAIL
When the malfunctioning door position is
detected at B/L position
B2638
DR D/F1 DOOR FAIL
When the malfunctioning door position is
detected at FOOT position
B2639
DR DEF DOOR FAIL
When the malfunctioning door position is
detected at DEF position
B2654
D/F2 DOOR FAIL
When the malfunctioning door position is
detected at D/F position
B2655
B/L2 DOOR FAIL
When the malfunctioning door position is
detected at B/L2 position
B2636, B2637, B2638, B2639, B2654, B2655 MODE DOOR MOTOR
HAC-49
< DTC/CIRCUIT DIAGNOSIS >
[WITH COLOR DISPLAY]
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Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position is at FRE
(
) when DEF (
) or D/F (
) is selected.
Does it operate normally?
YES
>> Inspection End.
NO
>> Check mode door motor installation, and repair or replace the malfunctioning parts. Refer to
107, "MODE DOOR MOTOR : Removal and Installation"
.
Diagnosis Procedure
INFOID:0000000010050994
Regarding Wiring Diagram information, refer to
HAC-67, "Wiring Diagram - With Color Display"
1.
CHECK MODE DOOR MOTOR POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between mode door motor harness connector
M127 terminal 1 and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connector.
2.
CHECK SIGNAL FOR MODE DOOR MOTOR
Confirm A/C LAN signal between mode door motor harness connec-
tor M127 terminal 3 and ground using an oscilloscope.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK MODE DOOR MOTOR GROUND CIRCUIT
1 - Ground
: Battery Voltage
AWIIA1148ZZ
(+)
(
−)
Voltage
Mode door motor
—
Connector
Terminal
M127
3
Ground
AWIIA1149ZZ
SJIA1453J
HAC-50
< DTC/CIRCUIT DIAGNOSIS >
[WITH COLOR DISPLAY]
B2636, B2637, B2638, B2639, B2654, B2655 MODE DOOR MOTOR
1. Turn ignition switch OFF.
2. Disconnect mode door motor connector.
3. Check continuity between mode door motor harness connector
M127 terminal 2 and ground.
Is the inspection result normal?
YES
>> Replace mode door motor. Refer to
DOOR MOTOR : Removal and Installation"
.
NO
>> Repair harness or connector.
2 - Ground
: Continuity should exist.
AWIIA1150ZZ
B263D, B263E, B263F INTAKE DOOR MOTOR
HAC-51
< DTC/CIRCUIT DIAGNOSIS >
[WITH COLOR DISPLAY]
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B263D, B263E, B263F INTAKE DOOR MOTOR
Description
INFOID:0000000010050995
COMPONENT DESCRIPTION
Intake Door Motor
• The intake door motor (1) is attached to the blower unit.
• It rotates so that air is drawn from inlets set by the A/C auto amp.
Motor rotation is conveyed to a lever which activates the intake
door.
DTC Logic
INFOID:0000000010050996
DTC DETECTION LOGIC
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
.
DTC CONFIRMATION PROCEDURE
1.
CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT
1. Using CONSULT, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
2. Check if any DTC No. is displayed in the self-diagnosis results.
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
.
Is DTC No.“B263D”, “B263E”, or “B263F” displayed?
YES
>> Perform trouble diagnosis for the intake door motor. Refer to
NO
>> GO TO 2.
2.
FUNCTION INSPECTION
1. Press the REC (
) switch, indicator is turned ON.
2. Listen for intake door position change. (Slight change of blower sound can be heard.)
3. Press the FRE (
) switch, indicator is turned ON.
4. Listen for intake door position change. (Slight change of blower sound can be heard.)
Does it operate normally?
YES
>> Inspection End.
NO
>> Check intake door motor installation, and repair or replace the malfunctioning parts. Refer to
107, "MODE DOOR MOTOR : Removal and Installation"
.
ALIIA0340ZZ
DTC
Items
(CONSULT screen terms)
Diagnostic item is detected when...
Possible cause
B263D
FRE DOOR FAIL
When the malfunctioning intake door posi-
tion is detected at FRE position
• Intake door motor
• A/C auto amp.
• Harness and connector
(CAN communication line is open
or shorted)
(Intake door motor is open or
shorted)
B263E
20P FRE DOOR FAIL
When the malfunctioning intake door posi-
tion is detected at 20% FRE position
B263F
REC DOOR FAIL
When the malfunctioning intake door posi-
tion is detected at REC position
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