1998 NISSAN PATROL Heather And Air Conditioner Workshop Manual

Component Location
ENGINE COMPARTMENT
RHA697G
TROUBLE DIAGNOSESAUTO
HA-55

PASSENGER COMPARTMENT
RHA698G
TROUBLE DIAGNOSESAUTO
Component Location (Cont'd)
HA-56

Circuit Diagram
THA153
TROUBLE DIAGNOSESAUTO
HA-57

Wiring Diagram Ð A/C, A Ð
YHA159
TROUBLE DIAGNOSESAUTO
HA-58

YHA160
TROUBLE DIAGNOSESAUTO
Wiring Diagram Ð A/C, A Ð (Cont'd)
HA-59

YHA161
TROUBLE DIAGNOSESAUTO
Wiring Diagram Ð A/C, A Ð (Cont'd)
HA-60

Auto Amp. Terminals and Reference Value
INSPECTION OF AUTO AMP.
+Measure voltage between each terminal and body ground by
following ``AUTO AMP. INSPECTION TABLE''.
+Pin connector terminal layout
RHA629G
RHA630G
TROUBLE DIAGNOSESAUTO
HA-61

AUTO AMP. INSPECTION TABLE
TERMINAL
No.ITEM CONDITIONVoltage
V
1 Power supply for IGN
Ð Approximately 12
2 Power supply for BAT
Ð Approximately 12
3 Ground Ð Ð
4 Compressor ON signal
CompressorON Approximately 0
OFF Approximately 12
5Power supply for mode and air mix
door motor
Ð Approximately 12
8 In-vehicle sensor Ð Ð
9 Ambient sensor Ð Ð
10 Sunload sensor Ð Ð
11 Ground Ð Ð
12 Power supply for illumination
Illumination switch ON Approximately 12
13 Intake door position switchRECIRCULATION Approximately 0
FRESH or 20% FRESH Approximately 12
14 Intake door position switchFRESH Approximately 0
RECIRCULATION or 20% FRESH Approximately 12
15 LAN signal Ð Approximately 5.5
17 Fan control amp. control signal Fan speedLow, middle low or middle high Approximately 2.5 - 3.0
High Approximately9-10
18 Blower motor feed back Ð Approximately 12
20 Power supply for blower motor
Ð Approximately 12
21 Thermal transmitter Ð Ð
23 Intake door position switch
20% FRESH Approximately 0
RECIRCULATION or FRESH Approximately 12
24 Sensor ground Ð Ð
25 Intake sensor Ð Ð
28 Rear cooler relay
Rear cooler ON Approximately 0
Rear cooler OFF Approximately 12
35 Rear cooler switchRear cooler switch ON Approximately 0
Rear cooler switch OFF Approximately 12
TROUBLE DIAGNOSESAUTO
Auto Amp. Terminals and Reference Value
(Cont'd)
HA-62