ignition NISSAN 350Z 2007 Z33 Automatic Air Conditioner Workshop Manual

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Revision: 2006 November2007 350Z
TROUBLE DIAGNOSISPFP:00004
CONSULT-III Function (BCM)NJS0000Q
CONSULT-III can display each diagnosis item using the diagnosis test modes shown following.
DATA MONITOR
Display Item List
System part Check item, diagnosis mode Description
BCM Data monitor Displays BCM input data in real time.
Monitor Item Condition Value/Status
IGNITION SW Ignition switch OFF → ON OFF → ON
HEATER FAN SW Ignition switch ONBlower fan motor switch ON ON
Blower fan motor switch OFF OFF
AIR COND SIG Ignition switch ONCompressor ON ON
Compressor ON OFF
AC PRESS SEN

Engine is running

Warm-up condition

Both A/C switch and blower fan motor switch: ON (Compressor
operates)1.0 - 4.0 V

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Auto Amp. Terminals and Reference ValueNJS0000V
Measure voltage between each terminal and ground by referring ter-
minals and reference value for unified meter and A/C amp.
PIN CONNECTOR TERMINAL LAYOUT
TERMINALS AND REFERENCE VALUE FOR UNIFIED METER AND A/C AMP.
RJIA1356E
RJIA1357E
Terminal
No.Wire
colorItemIgnition
switchConditionVoltage
(V)
1LCAN-H — — —
9L/ORMultiplex communication signal
(TX)—— —
11 P C A N - L — — —
19 R/GMultiplex communication signal
(RX)—— —
21 R/W Power supply from BATT OFF — Battery voltage
22 Y/G Power supply from IGN ON — Battery voltage
29 B Ground (Power) ON — Approx. 0
30 B Ground ON — Approx. 0
38 L/RRear window defogger ON sig-
nalONRear window defogger
switch is depressed.Approx. 0
Rear window defogger
switch is released.Approx. 12
39 Y Ambient sensor — — —
40 BR In-vehicle sensor — — —
41 SB Intake sensor — — —
42 G/Y Compressor ON signal ONA/C switch: ON (Blower
motor operates.)Approx. 0
A/C switch: OFF
SJIA1423J

ATC-44
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43 G/B A/C LAN signal ON —
46 L/W Power supply from IGN2ACC or
ON— Battery voltage
49 W/L Sensor ground ON — Approx. 0
50 LG Sunload sensor — — —
53 G Blower motor control signal ONBlower speed: 1st speed
(manual)
54 Y/RPower supply for each door
motorON — Battery voltage
56 B/WRear window defogger feedback
signalONRear window defogger
switch: ONApprox. 12
Rear window defogger
switch: OFFApprox. 0
57 BR/W Blower motor ON signal ONFan control dial: ON (A/C
system operates)Approx. 0
Fan control dial: OFF Approx. 5 Terminal
No.Wire
colorItemIgnition
switchConditionVo l ta g e
(V)
SJIA1453J
SJIA1454J

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Self-diagnosis FunctionNJS0000W
DESCRIPTION
The self-diagnosis system diagnoses sensors, door motors, blower motor, etc. by system line.
Self-diagnosis is STEP-1 to 7. There are two ways of changing method during self-diagnosis.

Switching to self-diagnosis STEP-1 to 4.
Shifting from normal control to the self-diagnosis system is accomplished by starting the engine (turning
the ignition switch from OFF to ON) and pressing A/C switch for at least 5 seconds. The A/C switch must
be pressed within 10 seconds after starting the engine (ignition switch is turned ON). This system will be
canceled by either pressing intake switch or turning the ignition switch OFF. Shifting to the next step is
accomplished by means of turning fan control dial, as required.

Switching to self-diagnosis STEP-5 to 7 (Auxiliary mechanism).
Shifting from normal control to the self-diagnosis system is accomplished by starting the engine (turning
the ignition switch from OFF to ON) and pressing intake switch for at least 5 seconds. The intake switch
must be pressed within 10 seconds after starting the engine (ignition switch is turned ON). This system
will be canceled by either pressing A/C switch or turning the ignition switch OFF. Shifting to the next step
is accomplished by means of turning fan control dial, as required.
SJIA1139E

ATC-46
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FUNCTION CONFIRMATION PROCEDURE
1. SET IN SELF-DIAGNOSIS MODE (STEP-1 TO 4)
1. Set the fan control dial to OFF position.
2. Turn ignition switch ON.
3. Set in self-diagnosis mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press A/C switch for at least 5 seconds.
NOTE:
If battery voltage drops below 12 V during diagnosis STEP-3, door motor speed becomes slower and as a
result, the system may generate an error even when operation is normal. To avoid this, start engine before
performing this diagnosis.
>> GO TO 2.
2. STEP-1: LEDS ARE CHECKED
Check intake and A/C switch LEDs illumination.
OK >> GO TO 3.
NG >> Refer to AT C - 9 1 , "
Self-diagnosis" .
3. CHECK TO ADVANCE SELF-DIAGNOSIS STEP-2
1. Turn fan control dial to AUTO position.
NOTE:
When switched to STEP-2, LED of REC position blinks for
approximately 25 seconds.
2. Check A/C switch LED illumination.
Advance to self
-diagnosis STEP-2?
YES >> GO TO 4.
NO >> Replace A/C controller. (Fan control dial is malfunction-
ing.)
4. CHECK TO RETURN SELF-DIAGNOSIS STEP-1
Turn fan control dial to OFF position.
Return to self
-diagnosis STEP-1?
YES >> GO TO 5.
NO >> Replace A/C controller. (Fan control dial is malfunctioning.)
S J I A 1111 E
S J I A 111 2 E

ATC-48
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8. CHECK ACTUATORS
Refer to the following chart and confirm discharge air flow, air tem-
perature, blower motor duty ratio and compressor operation.
Checks must be made visually, by listening the sound, or by touching air outlets with hand, etc. for improper
operation.
*1: STEP-No. 41 to 46 are for differentiation and will not be displayed.
*2: FOOT position during automatic control. Refer to AT C - 5 1 , "
AUXILIARY MECHANISM: FOOT POSITION
SETTING TRIMMER" .
OK or NG
OK >> 1. Turn ignition switch OFF or intake switch ON.
2. INSPECTION END
NG >>

Air outlet does not change.
Go to Mode Door Motor Circuit. Refer to AT C - 6 0 , "
Mode Door Motor Circuit" .

Intake door does not change.
Go to Intake Door Motor Circuit. Refer to AT C - 6 6 , "
Intake Door Motor Circuit" .

Discharge air temperature does not change.
Go to Air Mix Door Motor Circuit. Refer to AT C - 6 3 , "
Air Mix Door Motor Circuit" .

Blower motor operation is malfunctioning.
Go to Blower Motor Circuit. Refer to AT C - 6 9 , "
Blower Motor Circuit" .

Magnet clutch does not engage.
Go to Magnet Clutch Circuit. Refer to AT C - 7 4 , "
Magnet Clutch Circuit" .
RJIA2110E
STEP-No. *1STEP-41 STEP-42 STEP-43 STEP-44 STEP-45 STEP-46
Mode control dial posi-
tionAUTO VENT B/LFOOT or
FOOT2D/F or D/F2 DEF
Mode door position VENT VENT2 B/L
FOOT
*2D/F DEF
Intake door position REC REC REC FRE FRE FRE
Air mix door position FULL COLD FULL COLD FULL COLD FULL HOT FULL HOT FULL HOT
Blower motor duty ratio 25% 25% 41% 57% 75% 91%
Compressor ON ON OFF OFF ON ON

ATC-50
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AUXILIARY MECHANISM: TEMPERATURE SETTING TRIMMER
The trimmer compensates for differences in range of ±3°C (±6°F) between temperature setting (temperature
control dial position) and temperature felt by customer.
Operating procedures for this trimmer are as follows:
1. Set fan control dial to OFF.
2. Turn ignition switch ON.
3. Set in self-diagnosis mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press intake switch for at least 5 seconds.
4. When intake switch is pressed, temperature shifts in following order: 0°C (0°F)→ 1°C (2°F)→ 2°C (4°F)→
3°C (6°F)→ −3°C (−6°F)→ −2°C (−4°F)→ −1°C (−2°F)→ return to 0°C (0°F).
When battery cable is disconnected or battery voltage is below 9 V, trimmer operation is canceled. Tempera-
ture set becomes that of initial condition, i.e. 0°C (0°F).
Setting temperatureLED status of each switch
FRE REC A/C
−3°C (−6°F) ON ON ON
−2°C (−4°F) ON ON OFF
−1°C (−2°F) ON OFF ON
0°C (0°F) (Initial setting) OFF OFF OFF
1°C (2°F) OFF OFF ON
2°C (4°F) OFF ON OFF
3°C (6°F) OFF ON ON

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AUXILIARY MECHANISM: FOOT POSITION SETTING TRIMMER
Wind distribution ratio in FOOT mode can be set.
Operating procedures for this trimmer are as follows:
1. Set fan control dial to AUTO.
2. Turn ignition switch ON.
3. Set in self-diagnosis mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press intake switch for at least 5 seconds.
4. Press intake switch as desired.
When battery cable is disconnected or battery voltage is below 9 V, trimmer operation is canceled. Wind distri-
bution ratio set becomes that of initial condition.
AUXILIARY MECHANISM: INLET PORT MEMORY FUNCTION
When ignition switch is turned from OFF to ON, inlet port memory function at manual mode can be set.
Operating procedures for this trimmer are as follows:
1. Set fan control dial to 1st - 12th speed.
2. Turn ignition switch ON.
3. Set in self-diagnosis mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press intake switch for at least 5 seconds.
4. Press intake switch as desired.
RJIA1365E
Ty p eLED status of each switch
FRE REC A/C
Type-A (Initial setting) OFF OFF ON
Ty p e - B O F F O N O F F
Type-C OFF ON ON
Type-D ON OFF OFF
LED status of
FRE positionLED status of
REC positionSetting status
Setting changeover
method
FRE REC
OFF OFF AUTO control AUTO control
Intake SW: ON OFF ON AUTO control (Initial setting)Manual REC status is memorized.
(Initial setting)
ON ON Manual FRE status is memorized. AUTO control
ON OFF Manual FRE status is memorized. Manual REC status is memorized.

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Potentio Temperature Control (PTC)
The PTC is built into the A/C controller. It can be set at an interval of
1°C (2.0°F) in the 18°C (60°F) to 32°C (90°F) temperature range by
turning the temperature control dial.
DIAGNOSIS PROCEDURE FOR A/C SYSTEM
SYMPTOM: A/C system does not come on.
1. CHECK POWER SUPPLY CIRCUIT FOR UNIFIED METER AND A/C AMP.
1. Disconnect unified meter connector and A/C amp. connector.
2. Check voltage between unified meter and A/C amp. harness
connector M49 terminal 21 and 22, unified meter and A/C amp.
harness connector M50 terminal 46 and ground.
OK or NG
OK >> GO TO 2.
NG >> Check 10A and 15A fuses [Nos. 10, 11, 12 and 19, located in the fuse block (J/B)]. Refer to PG-
85, "FUSE BLOCK - JUNCTION BOX (J/B)" .

If fuses are OK, check harness for open circuit. Repair or replace if necessary.

If fuses are NG, check harness for short circuit and replace fuse.
SJIA1124E
RJIA1374E
Terminals Ignition switch position
(+)
(−)OFF ACC ON Unified
meter and
A/C amp.
connectorTerminal No.
M49 21
GroundBattery
voltageBattery
voltageBattery
voltage
M49 22 Approx. 0 V Approx. 0 VBattery
voltage
M50 46 Approx. 0 VBattery
voltageBattery
voltage
RJIA2121E

ATC-56
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Revision: 2006 November2007 350Z
2. CHECK GROUND CIRCUIT FOR UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Check continuity between unified meter and A/C amp. harness
connector M49 terminal 29, 30 and ground.
OK or NG
OK >> Replace unified meter and A/C amp.
NG >> Repair harness or connector.
LAN System CircuitNJS0000Z
SYMPTOM: Mode door motor, intake door motor and/or air mix door motor does not operate normally.
DIAGNOSIS PROCEDURE FOR LAN CIRCUIT
1. CHECK POWER SUPPLY FOR UNIFIED METER AND A/C AMP.
1. Turn ignition switch ON.
2. Check voltage between unified meter and A/C amp. harness
connector M50 terminal 54 and ground.
OK or NG
OK >> GO TO 2.
NG >> Replace unified meter and A/C amp.29, 30 – Ground : Continuity should exist.
RJIA1985E
RJIA2122E
54 – Ground : Battery voltage
RJIA1986E