Page 78 of 172
LT-78
TURN SIGNAL AND HAZARD WARNING LAMPS
Revision: 2006 November2007 350Z
How to Proceed With Trouble DiagnosisNKS004YA
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT- 6 5 , "
System Description" .
3. Perform preliminary check. Refer to LT- 7 9 , "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Do turn signal and hazard warning lamps operate normally? If YES, GO TO 6. If NO, GO TO 4.
6. INSPECTION END
42 GYBattery power
supplyOFF — Battery voltage
45 G/W Turn signal (left) ON Combination switch Turn left ON
46 PU/W Turn signal (right) ON Combination switch Turn right ON
52 B Ground ON — Approx. 0V
55 RBattery power
supplyOFF — Battery voltage Te r -
minal
No.Wire
colorSignal nameMeasuring condition
Reference value
Ignition
switchOperation or condition
SKIA3009J
SKIA3009J
Page 79 of 172

TURN SIGNAL AND HAZARD WARNING LAMPS
LT-79
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Preliminary CheckNKS004YB
CHECK POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES AND FUSIBLE LINK
Check for blown fuses and fusible link.
Refer to LT- 6 9 , "
Wiring Diagram — TURN —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
4, "POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connectors.
3. Check voltage between BCM harness connector terminals and
ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK GROUND CIRCUIT
Check continuity between BCM harness connector terminal and
ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
UNIT POWER SOURCE Fuse and fusible link No.
BCMBatteryF
18
Ignition switch ON or START position 1
Ignition switch ACC or ON position 6
Terminals Ignition switch position
(+)
(-) OFF ON
BCM
connectorTerminal
M90 38
GroundApprox. 0 V Battery voltage
M9142 Battery voltage Battery voltage
55 Battery voltage Battery voltage
PKIB5199E
BCM connector Terminal
GroundContinuity
M91 52 Yes
PKIB5198E
Page 88 of 172

LT-88
COMBINATION SWITCH
Revision: 2006 November2007 350Z
5Y/RCombination
switch input 2ONLighting, turn,
wiper switchOFF
(Wiper intermittent dial position 4)Approx. 0 V
Any of the conditions below
Front washer switch
Rear washer switch
Wiper intermittent dial position 1
Wiper intermittent dial position 5
Wiper intermittent dial position 6
Approx. 1.0 V
Rear wiper switch ON
(Wiper intermittent dial position 4)
Approx. 0.8 v
6Y/GCombination
switch input 1ONLighting, turn,
wiper switchOFF
(Wiper intermittent dial position 4)Approx. 0 V
Any of the conditions below
Front wiper switch HI
Rear wiper switch INT
Wiper intermittent dial position 3
Approx. 1.0 V
Any of the conditions below
Wiper intermittent dial position 1
Wiper intermittent dial position 2
Approx. 1.7 V
Any of the conditions below
Wiper intermittent dial position 6
Wiper intermittent dial position 7
Approx. 0.8 V
11 L GIgnition switch
(ACC)ACC — Battery voltage Te r -
minal
No.Wire
colorSignal nameMeasuring condition
Reference value
Ignition
switchOperation or condition
PKIB4959J
PKIB4955J
PKIB4959J
PKIB4952J
PKIB4955J
Page 90 of 172
LT-90
COMBINATION SWITCH
Revision: 2006 November2007 350Z
35 W/GCombination
switch output 2ONLighting, turn,
wiper switch
(Wiper inter-
mittent dial
position 4)OFF
Approx. 7.2 V
Any of the conditions below
Lighting switch 2ND
Lighting switch PASSING
(Operates only PASSING
switch)
Front wiper switch INT
Front wiper switch HI
Approx. 1.2 V
36 W/RCombination
switch output 1ONLighting, turn,
wiper switch
(Wiper inter-
mittent dial
position 4)OFF
Approx. 7.2 V
Any of the conditions below
Turn signal switch to right
Turn signal switch to left
Front wiper switch MIST
Front wiper switch LO
Front washer switch
Approx. 1.2 V
38 W/LIgnition switch
(ON) ON — Battery voltage
39 L CAN − H— — —
40 P CAN − L— — —
42 GYBattery power
supplyOFF — Battery voltage
52 B Ground ON — Approx. 0V
55 RBattery power
supplyOFF — Battery voltage Te r -
minal
No.Wire
colorSignal nameMeasuring condition
Reference value
Ignition
switchOperation or condition
PKIB4960J
PKIB4958J
PKIB4960J
PKIB4958J
Page 97 of 172

STOP LAMP
LT-97
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High-Mounted Stop Lamp (Coupe Models)NKS004YT
BULB REPLACEMENT, REMOVAL AND INSTALLATION
1. Remove back door finisher upper. Refer to EI-48, "BACK DOOR
FINISHER" .
2. Disconnect high-mounted stop lamp connector.
3. Remove nuts and remove high-mounted stop lamp with cover
from back door. Be sure to pull toward the arrow in the figure.
4. Remove screws and remove high-mounted stop lamp assembly
from cover.
5. Installation is the reverse order of removal.
High-Mounted Stop Lamp (Roadster Models)NKS004YU
BULB REPLACEMENT, REMOVAL AND INSTALLATION
1. Turn ignition switch ON, and turn soft-top OPEN/CLOSE switch
ON.
2. When the storage lid is fully opened, soft-top OPEN/CLOSE
switch to OFF.
3. Remove battery negative cable.
4. Disconnect high-mounted stop lamp connector.
5. Remove high-mounted stop lamp.
6. Remove high-mounted stop lamp assembly from storage lid.
7. Installation is the reverse order of removal.
Stop LampNKS004YV
BULB REPLACEMENT
Refer to LT- 1 2 6 , "Bulb Replacement" .
REMOVAL AND INSTALLATION
Refer to LT- 1 2 7 , "Removal and Installation" . High-mounted stop lamp : LED
PKIA1873E
High-mounted stop lamp : LEDPKIA3697E
Page 104 of 172

LT-104
PARKING, LICENSE PLATE AND TAIL LAMPS
Revision: 2006 November2007 350Z
to BCM terminal 42.
With ignition switch in ON or START position, power is supplied
to CPU located in IPDM E/R,
through 10A fuse [No.1, located in fuse block (J/B)]
to BCM terminal 38.
With ignition switch in ACC or ON position, power is supplied
through 10A fuse [No. 6, located in fuse block (J/B)]
to BCM terminal 11.
Ground is supplied
to BCM terminal 52
through grounds M30 and M66,
to IPDM E/R terminals 38 and 60
through grounds E17, E43 and B102 (with VDC system, navigation system or telephone)
through grounds E17, E43 and F152 (without VDC system, navigation system and telephone).
OPERATION BY LIGHTING SWITCH
With the lighting switch in the 1ST or 2ND position, the BCM receives input signal requesting the parking,
license plate, side marker and tail lamps to illuminate. This input is communicated to the IPDM E/R through
the CAN communication lines. The CPU located in the IPDM E/R controls the tail lamp relay coil and daytime
light relay
* coil. These relay, when energized, directs power to parking, license plate, side marker and tail
lamps, which when energized, directs power
through IPDM E/R terminal 22 (USA models)
through daytime light relay terminal 5 (Canada models)
to front combination lamp LH terminals 6
to front combination lamp RH terminals 6
to rear combination lamp LH terminals 2
to rear combination lamp RH terminals 2
to license plate lamp LH terminal 2, and
to license plate lamp RH terminal 2.
Ground is supplied at all times
to front combination lamp LH terminal 8, and
to front combination lamp RH terminal 8
through grounds E17, E43 and B102 (with VDC system, navigation system or telephone)
through grounds E17, E43 and F152 (without VDC system, navigation system and telephone),
to rear combination lamp LH terminals 3
to rear combination lamp RH terminals 3
to license plate lamp LH terminal 1, and
to license plate lamp RH terminal 1
through grounds B5, B6, D105 and T14 (Coupe models)
through grounds B5, B6 and T14 (Roadster models).
With power and ground supplied, parking, license plate side marker and tail lamps illuminate.
NOTE:
Daytime light relay*: Canada models
COMBINATION SWITCH READING FUNCTION
Refer to BCS-3, "COMBINATION SWITCH READING FUNCTION" .
EXTERIOR LAMP BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the 2ND position (ON), and the ignition switch is turned
from ON or ACC to OFF, the battery saver control function is activated.
Under this condition, the parking, license, side marker and tail lamps remain illuminated for 5 minutes, then the
headlamps are turned off.
Exterior lamp battery saver control mode can be changed by the function setting of CONSULT-III.
Page 112 of 172

LT-112
PARKING, LICENSE PLATE AND TAIL LAMPS
Revision: 2006 November2007 350Z
Terminals and Reference Values for BCMNKS004Z5
CAUTION:
Check combination switch system terminal waveform under the loaded condition with lighting
switch, turn signal switch and wiper switch OFF not to be fluctuated by overloaded.
Turn wiper dial position to 4 except when checking waveform or voltage of wiper dial position.
Wiper dial position can be confirmed on CONSULT-III. Refer to LT- 9 1 , "
DATA MONITOR" .
Te r -
minal
No.Wire
colorSignal nameMeasuring condition
Reference value
Ignition
switchOperation or condition
2GYCombination
switch input 5ONLighting, turn,
wiper switch
(Wiper inter-
mittent dial
position 4)OFF Approx. 0 V
Any of the conditions below
Lighting switch 1ST
Lighting switch HIGH beam
(Operates only HIGH beam
switch)
Approx. 1.0 V
Lighting switch 2ND
Approx. 2.0 V
3L/WCombination
switch input 4ONLighting, turn,
wiper switch
(Wiper inter-
mittent dial
position 4)OFF Approx. 0 V
Any of the conditions below
Lighting switch 2ND
Lighting switch PASSING
(Operates only PASSING switch)
Approx. 1.0 V
11 L GIgnition switch
(ACC)ACC — Battery voltage
PKIB4959J
PKIB4953J
PKIB4959J
Page 113 of 172

PARKING, LICENSE PLATE AND TAIL LAMPS
LT-113
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33 GCombination
switch output 4ONLighting, turn,
wiper switch
(Wiper inter-
mittent dial
position 4)OFF
Approx. 7.2 V
Lighting switch 1ST (The same
result with lighting switch 2ND)
Approx. 1.2 V
34 W/LCombination
switch output 3ONLighting, turn,
wiper switch
(Wiper inter-
mittent dial
position 4)OFF
Approx. 7.2 V
Any of the conditions below
Lighting switch 2ND
Lighting switch HI beam
(Operates only HI beam switch)
Approx. 1.2 V
35 W/GCombination
switch output 2ONLighting, turn,
wiper switch
(Wiper inter-
mittent dial
position 4)OFF
Approx. 7.2 V
Any of the conditions below
Lighting switch 2ND
Lighting switch PASSING
(Operates only PASSING switch)
Approx. 1.2 V
38 W/LIgnition switch
(ON) ON — Battery voltage Te r -
minal
No.Wire
colorSignal nameMeasuring condition
Reference value
Ignition
switchOperation or condition
PKIB4960J
PKIB4958J
PKIB4960J
PKIB4958J
PKIB4960J
PKIB4958J