ATC-16
PRECAUTIONS
Revision: 2005 July 2005 FX
Precautions for Leak Detection DyeAJS001XO
The A/C system contains a fluorescent leak detection dye used for locating refrigerant leaks. An ultraviolet
(UV) lamp is required to illuminate the dye when inspecting for leaks.
Always wear fluorescence enhancing UV safety goggles to protect your eyes and enhance the visibility of
the fluorescent dye.
The fluorescent dye leak detector is not a replacement for an electronic refrigerant leak detector. The fluo-
rescent dye leak detector should be used in conjunction with an electronic refrigerant leak detector (SST:
J-41995) to pin-point refrigerant leaks.
For your safety and your customer’s satisfaction, read and follow all manufacture ′s operating instructions
and precautions prior to performing the work.
A compressor shaft seal should not be repaired because of dye seepage. The compressor shaft seal
should only be repaired after confirming the leak with an electronic refrigerant leak detector (SST: J-
41995).
Always remove any remaining dye from the leak area after repairs are completed to avoid a misdiagnosis
during a future service.
Never allow dye to come into contact with painted body panels or interior components. If dye is spilled,
clean immediately with the approved dye cleaner. Fluorescent dye left on a surface for an extended period
of time cannot be removed.
Never spray the fluorescent dye cleaning agent on hot surfaces (engine exhaust manifold, etc.).
Never use more than one refrigerant dye bottle (1/4 ounce /7.4 cc) per A/C system.
Leak detection dyes for HFC-134a (R-134a) and CFC-12 (R-12) A/C systems are different. Never use
HFC-134a (R-134a) leak detection dye in CFC-12 (R-12) A/C system or CFC-12 (R-12) leak detection
dye in HFC-134a (R-134a) A/C system, or A/C system damage may result.
The fluorescent properties of the dye will remain for three years or little over unless a compressor mal-
function occurs.
IDENTIFICATION
NOTE:
Vehicles with factory installed fluorescent dye have a green label.
Vehicles without factory installed fluorescent dye have a blue label.
IDENTIFICATION LABEL FOR VEHICLE
Vehicles with factory installed fluorescent dye have this identification
label on the front side of hood.
SHA436FA
ATC-18
PREPARATION
Revision: 2005 July 2005 FX
HFC-134a (R-134a) Service Tools and EquipmentAJS00144
Never mix HFC-134a (R-134a) refrigerant and/or its specified lubricant with CFC-12 (R-12) refrigerant and/or
its lubricant.
Separate and non-interchangeable service equipment must be used for handling each type of refrigerant/lubri-
cant.
Refrigerant container fittings, service hose fittings and service equipment fittings (equipment which handles
refrigerant and/or lubricant) are different between CFC-12 (R-12) and HFC-134a (R-134a). This is to avoid
mixed use of the refrigerants/lubricant.
Never use adapters that convert one size fitting to another: refrigerant/lubricant contamination will occur and
compressor malfunction will result.
Tool number
(Kent-Moore No.)
Tool name Description
HFC-134a (R-134a) refrigerant Container color: Light blue
Container marking: HFC-134a (R-
134a)
Fitting size: Thread size
Large container 1/2″ -16 ACME
KLH00-PAGS0
( - )
Nissan A/C System Oil Type S
(DH-PS) Type: Polyalkylene glycol oil (PAG),
type S (DH-PS)
Application: HFC-134a (R-134a)
wobble (swash) plate compressors
(Nissan only)
Capacity: 40 m (1.4 US fl oz., 1.4
Imp fl oz.)
(AC-R2005-NI)
ACR5 A/C Service Center Function: Refrigerant recovery,
recycling and recharging
(J-41995)
Electrical leak detector Power supply:
DC 12 V (Battery terminal)
S-NT196
S-NT197
WJIA0293E
AHA281A
ATC-20
PREPARATION
Revision: 2005 July 2005 FX
Commercial Service ToolsAJS00145
Service hoses
High-pressure side hose
(J-39501-72)
Low-pressure side hose
(J-39502-72)
Utility hose
(J-39476-72) Hose color:
Low hose: Blue with black stripe
High hose: Red with black stripe
Utility hose: Yellow with black stripe
or green with black stripe
Hose fitting to gauge:
1/2″ -16 ACME
Service couplers
High-pressure side coupler
(J-39500-20)
Low-pressure side coupler
(J-39500-24) Hose fitting to service hose:
M14 x 1.5 fitting is optional or
permanently attached.
(J-39650)
Refrigerant weight scale For measuring of refrigerant
Fitting size: Thread size
1/2″ -16 ACME
(J-39649)
Vacuum pump
(Including the isolator valve) Capacity:
Air displacement: 4 CFM
Micron rating: 20 microns
Oil capacity: 482 g (17 oz.)
Fitting size: Thread size
1/2″ -16 ACME
Tool number
(Kent-Moore No.)
Tool name Description
S-NT201
S-NT202
S-NT200
S-NT203
Tool name
Description
Refrigerant identifier equipment Checking for refrigerant purity and
system contamination
Power tool For loosening bolts and nuts
RJIA0197E
PBIC0190E
ATC-158
REFRIGERANT LINES
Revision: 2005 July 2005 FX
Checking for Refrigerant LeaksAJS00163
Perform a visual inspection of all refrigeration parts, fittings, hoses and components for signs of A/C lubricant
leakage, damage and corrosion. A/C lubricant leakage may indicate an area of refrigerant leakage. Allow
extra inspection time in these areas when using either an electronic refrigerant leak detector or fluorescent
dye leak detector (SST: J-42220).
If dye is observed, confirm the leak with an electronic refrigerant leak detector. It is possible a prior leak was
repaired and not properly cleaned.
When searching for leaks, do not stop when one leak is found but continue to check for additional leaks at all
system components and connections.
When searching for refrigerant leaks using an electronic leak detector, move the probe along the suspected
leak area at 1 to 2 inches per second and no further than 1/4 inch from the component.
CAUTION:
Moving the electronic leak detector probe slower and closer to the suspected leak area will improve
the chances of finding a leak.
Checking System for Leaks Using the Fluorescent Leak DetectorAJS00164
1. Check A/C system for leaks using the UV lamp and safety goggles (SST: J42220) in a low sunlight area (area without windows preferable). Illuminate all components, fittings and lines. The dye will appear as a
bright green/yellow area at the point of leakage. Fluorescent dye observed at the evaporator drain open-
ing indicates an evaporator core assembly (tubes, core or expansion valve) leak.
2. If the suspected area is difficult to see, use an adjustable mirror or wipe the area with a clean shop rag or cloth, with the UV lamp for dye residue.
3. After the leak is repaired, remove any residual dye using dye cleaner (SST: J43872) to prevent future mis- diagnosis.
4. Perform a system performance check and verify the leak repair with an approved electronic refrigerant leak detector.
NOTE:
Other gases in the work area or substances on the A/C components, for example, anti-freeze, windshield
washer fluid, solvents and lubricants, may falsely trigger the leak detector. Make sure the surfaces to be
checked are clean.
Clean with a dry cloth or blow off with shop air.
Do not allow the sensor tip of the detector to contact with any substance. This can also cause false readings
and may damage the detector.
Dye InjectionAJS00165
(This procedure is only necessary when recharging the system or when the compressor has seized and was
replaced.)
1. Check A/C system static (at rest) pressure. Pressure must be at least 345 kPa (3.52 kg/cm
2 , 50 psi).
2. Pour one bottle (1/4 ounce / 7.4 cc) of the A/C refrigerant dye into the injector tool (SST: J 41459).
3. Connect the injector tool to the A/C Low-pressure side service fitting.
4. Start engine and switch A/C ON.
5. When the A/C operating (compressor running), inject one bottle (1/4 ounce / 7.4 cc) of fluorescent dye through the low-pressure service valve using dye injector tool (SST: J-41459) (refer to the manufacture’s
operating instructions).
6. With the engine still running, disconnect the injector tool from the service fitting. CAUTION:
Be careful the A/C system or replacing a component, pour the dye directly into the open system
connection and proceed with the service procedures.
7. Operate the A/C system for a minimum of 20 minutes to mix the dye with the system oil. Depending on the leak size, operating conditions and location of the leak, it may take from minutes to days for the dye to
penetrate a leak and become visible.
8. Attach a blue label as necessary.
NAVIGATION SYSTEM AV-119
C
D E
F
G H
I
J
L
M A
B
AV
Revision: 2005 July 2005 FX
Terminals and Reference Value for NAVI Control UnitAKS007IV
Terminal No.
(Wire color) Item Signal
input/
output Condition
Voltag e Example of
symptom
+– Ignition
switch Operation
1 (B) Ground Ground — ON — Approx. 0 V —
2 (Y) Ground Battery power
supply Input OFF — Battery voltage System does not
work properly.
3 (Y)
4 (B) Ground Ground — ON — Approx. 0 V —
6 (LG) Ground ACC power
supply Input ACC — Battery voltage System does not
work properly.
7 (LG) 8 (PU) Voice guide sig-
nal Output ON Press the “GUIDE/
VOICE” button. Only route guide
and operation
guide are not
heard.
9 — Shield ground — — — — —
14 — Shield ground — — — — —
15 (B) 17 RGB signal
(B: blue) Output ON Select “Display
Diagnosis (NAVI)” of
CONFIRMATION/
ADJUSTMENT
function. RGB screen
looks yellowish.
16 (G) 14 RGB synchro-
nizing signal Output ON
Press the “MAP”
button. RGB screen is
rolling.
17 — Shield ground — — — — —
18 (R) 17 RGB signal
(R: red) Output ON Select “Display
Diagnosis (NAVI)” of
CONFIRMATION/
ADJUSTMENT
function. RGB screen
looks bluish.
21 (W) 17 RGB signal
(G: green) Output ON Select “Display
Diagnosis (NAVI)” of
CONFIRMATION/
ADJUSTMENT
function. RGB screen
looks reddish.
25 (R) Ground Illumination sig-
nal Input OFF Lighting switch posi-
tion 1st or 2nd Approx. 12 V
Night illumina-
tion for switches
does not illumi-
nate.
Lighting switch posi-
tion OFF Approx. 0 V
SKIA0171J
SKIA4979E
SKIA0164E
SKIA4977E
SKIA4978E
NAVIGATION SYSTEM AV-123
C
D E
F
G H
I
J
L
M A
B
AV
Revision: 2005 July 2005 FX
42 (B/Y) Ground Audio
communica-
tion signal Input ON
Operate audio
volume. Audio dose not
operate properly.
43 (G/B) 41 RGB synchro-
nizing signal Input ON Press the “MAP”
button. RGB screen is
rolling.
44 (R/W) 45 RGB signal
(R: red) Input ON Select “Display
Diagnosis (NAVI)”
of CONFIRMA-
TION/ADJUST-
MENT function. RGB screen
looks bluish.
45 — Shield ground — — — — —
46 (R/L) 45 RGB signal
(G: green) Input ON Select “Display
Diagnosis (NAVI)”
of CONFIRMA-
TION/ADJUST-
MENT function. RGB screen
looks reddish.
47 — Shield ground — — — — —
48 (B) 45 RGB signal
(B: blue) Input ON Select “Display
Diagnosis (NAVI)”
of CONFIRMA-
TION/ADJUST-
MENT function. RGB screen
looks yellowish.
49 — Shield ground — — — — —
50 (L/R) 47 RGB signal
(R: red) Output ON Select “Display
Diagnosis (DCU)”
of CONFIRMA-
TION/ADJUST-
MENT function. RGB screen
looks bluish.
Terminal No.
(Wire color) Item Signal
input/
output Condition
Voltage Example of
symptom
+– Ignition
switch Operation
SKIA4402E
SKIA0164E
SKIA4977E
SKIA4978E
SKIA4979E
SKIA4980E
AV-124
NAVIGATION SYSTEM
Revision: 2005 July 2005 FX
51 (B) 49 RGB area
(YS) signal Output ON Press the“TRIP”
button. RGB screen is
not shown.
52 (L/W) 47 RGB signal
(G: green) Output ON Select “Display
Diagnosis (DCU)”
of CONFIRMA-
TION/ADJUST-
MENT function. RGB screen
looks reddish.
53 (W) 49 Vertical syn-
chronizing
(VP) signal Input ON
Selector lever in
R position. Rear view moni-
tor screen is roll-
ing.
54 (L) 47 RGB signal
(B: blue) Output ON Select “Display
Diagnosis (DCU)”
of CONFIRMA-
TION/ADJUST-
MENT function. RGB screen
looks yellowish.
55 (R) 49 Horizontal
synchroniz-
ing (HP) sig-
nal Input ON —
RGB screen is
not shown.
56 (G) 49 RGB synchro-
nizing signal Output ON Press the “TRIP”
button. RGB screen is
rolling.
Terminal No.
(Wire color) Item Signal
input/
output Condition
Voltag e Example of
symptom
+– Ignition
switch Operation
SKIA0162E
SKIA4981E
SKIA0161E
SKIA4982E
SKIA4983E
SKIA0164E
AV-126
NAVIGATION SYSTEM
Revision: 2005 July 2005 FX
18 (L) 7 RGB signal
(B: blue) Input ON Select “Display
Diagnosis (DCU)”
of CONFIRMA-
TION/ADJUST-
MENT function. RGB screen
looks yellow-
ish.
19 (G) 21 RGB synchroniz-
ing signal Input ON Press the “TRIP”
button. RGB screen
is rolling.
20 (W) 21 Vertical synchro-
nizing (VP) signal Output ONSelector lever in
R position. Rear view
monitor
screen is roll-
ing.
21 — Shield ground — — — — —
22 (LG) 23 Display communi-
cation signal
(DSP-DCU) Output ON – Though a
screen is dis-
played, it is
impossible to
adjust bright-
ness.
23 — Shield ground — — — — —
Terminal No. (Wire color) Item Signal
input/
output Condition
Voltag e Example of
symptom
+– Ignition
switch Operation
SKIA4982E
SKIA0164E
SKIA0161E
SKIA4363E