Nissan Pathfinder. Manual — part 696
A/C AUTO AMP.
HAC-45
< ECU DIAGNOSIS INFORMATION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
*1: With heated steering wheel
23
(LG)
Ground
Ignition power supply
Input
Ignition switch ON
Battery voltage
24
(G)
Ground
Communication signal
(A/C switch assembly
→A/C
auto amp.)
Input
Ignition switch ON
25
(W)
Ground
Communication signal
(Rear air control
→A/C auto
amp.)
Input
Ignition switch ON
26
(G)
—
Sensor ground
—
—
—
27
(W)
Ground
In-vehicle sensor signal
Input
Ignition switch ON
0 – 4.8 V
Output voltage varies with in-vehi-
cle temperature
28
(W)
Ground
Intake sensor signal
Input
Ignition switch ON
0 – 4.8 V
Output voltage varies with front
evaporator fin temperature
32
(L)
Ground
Blower motor feedback
Input
• Ignition switch ON
• Blower speed: OFF
Battery voltage
• Ignition switch ON
• Blower speed: 1st
10 V
• Ignition switch ON
• Blower speed: 25th
0 V
34
(L)
Ground
Blower motor feedback
Input
• Ignition switch ON
• Blower speed: OFF
Battery voltage
• Ignition switch ON
• Blower speed: 1st
10 V
• Ignition switch ON
• Blower speed: 25th
0 V
35
(LG)
Ground
Rear window defogger feed-
back
Input
Ignition
switch
ON
Rear defog-
ger: ON
Battery voltage
Rear defog-
ger: OFF
0 V
37
(BR)
—
Ground
—
—
—
39
(L)
Ground
PTC2 relay output signal
Input
Ignition
switch
ON
PTC heater:
ON
0 V
PTC heater:
OFF
Battery voltage
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
−
Signal name
Input/
Output
SJIA1522J
SJIA1522J
HAC-46
< ECU DIAGNOSIS INFORMATION >
[AUTOMATIC AIR CONDITIONING]
A/C AUTO AMP.
Fail-safe
INFOID:0000000009176803
FAIL-SAFE FUNCTION
If a communication error exists between the A/C auto amp., and the AV control unit and preset switch for 30
seconds or longer, air conditioning is controlled under the following conditions:
When ambient temperature is less than 3
°C (37°F) and engine coolant temperature is less than 56°C (133°F)
When ambient temperature is 3
°C (37°F) or more, or engine coolant temperature is 56°C (133°F) or more
DTC Index
INFOID:0000000009176804
Compressor
: ON
Air outlet
: DEF
Air inlet
: FRE (Fresh air intake)
Blower fan speed
: AUTO
Set temperature
: Setting before communication error occurs
Compressor
: ON
Air outlet
: AUTO
Air inlet
: 20% FRE (20% fresh air intake)
Blower fan speed
: AUTO
Set temperature
: Setting before communication error occurs
DTC
Items
(CONSULT screen terms)
Reference
U1000
CAN COMM CIRCUIT
U1010
CONTROL UNIT (CAN)
B2578
IN-VEHICLE SENSOR
B2579
IN-VEHICLE SENSOR
B257B
AMBIENT SENSOR
B257C
AMBIENT SENSOR
B2581
INTAKE SENSOR
B2582
INTAKE SENSOR
B2630
*1
SUNLOAD SENSOR
B2631
*1
SUNLOAD SENSOR
B2632
DR AIR MIX DOOR MOT
B2633
DR AIR MIX DOOR MOT
B2634
PASS AIR MIX DOOR MOT
B2635
PASS AIR MIX DOOR MOT
B2636
DR VENT DOOR FAIL
B2637
DR B/L DOOR FAIL
B2638
DR D/F1 DOOR FAIL
B2639
DR DEF DOOR FAIL
B263D
FRE DOOR FAIL
B263E
20P FRE DOOR FAIL
B263F
REC DOOR FAIL
B2654
D/F2 DOOR FAIL
B2796
COMMUNICATION ERROR
B2797
COMMUNICATION ERROR
B2798
COMMUNICATION ERROR
A/C AUTO AMP.
HAC-47
< ECU DIAGNOSIS INFORMATION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
*1: Perform self-diagnosis under sunshine. When performing indoors, aim a light (more than 60 W) at sunload
sensor, otherwise self-diagnosis indicates even though the sunload sensor is functioning normally.
NOTE:
If all of door motor DTCs (B2632, B2633, B2634, B2635, B2636, B2637, B2638, B2639, B263D, B263E,
B263F, B2654, B2799, B279A, B279B, B279C, B279D, and B279E) are detected, check door motor communi-
cation circuit. Refer to
HAC-128, "Diagnosis Procedure"
B2799
REAR AIR MIX DOOR MOT
B279A
REAR AIR MIX DOOR MOT
B279B
REAR MODE DOOR MOT
B279C
REAR MODE DOOR MOT
B279D
REAR SHUT-OFF DOOR MOT
B279E
REAR SHUT-OFF DOOR MOT
B27B0
A/C AUTO AMP.
DTC
Items
(CONSULT screen terms)
Reference
HAC-48
< ECU DIAGNOSIS INFORMATION >
[AUTOMATIC AIR CONDITIONING]
ECM, IPDM E/R, BCM
ECM, IPDM E/R, BCM
List of ECU Reference
INFOID:0000000009176805
ECU
Reference
ECM
EC-89, "DTC Inspection Priority Chart"
IPDM E/R
BCM
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