Power Supply, Ground & Circuit Elements: Other Nissan Juke I

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. Information necessary to service the system safely is included in the " SRS AIRBAG " and " SEAT BELTS " of this Service Information.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

Special Service Tools

Tool number (Kent-Moore No.) Tool name Description - (-) Model GR8-1200 NI Multitasking battery and electrical diagnostic station Tests batteries, starting and charging systems and charges batteries. For operating instructions, refer to diagnostic station instruction manual. - (-) Model EXP-800 NI Battery and electrical diagnostic analyzer Tests batteries and charging systems. For operating instructions, refer to diagnostic analyzer instruction manual

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Circuit Breaker

The PTC thermistor generates heat in response to current flow. The temperature (and resistance) of the thermistor element varies with current flow. Excessive current flow will cause the element's temperature to rise. When the temperature reaches a specified level, the electrical resistance will rise sharply to control the circuit current. Reduced current flow will cause the element to cool. Resistance falls accordingly and normal circuit current flow is allowed to resume.

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Battery

NORMAL OPEN, NORMAL CLOSED AND MIXED TYPE RELAYS

Relays can mainly be divided into three types: normal open, normal closed and mixed type relays.

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How to Handle Battery

METHODS OF PREVENTING OVER-DISCHARGE

The following precautions must be taken to prevent over-discharging a battery.

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1. The battery surface (particularly its top) should always be kept clean and dry.
2. The terminal connections should be clean and tight.
3. At every routine maintenance, check the electrolyte level. This also applies to batteries designated as "low maintenance" and "maintenance-free".
4. When the vehicle is not going to be used over a long period of time, disconnect the battery cable from the negative terminal. (If the vehicle has an extended storage switch, turn it off.)

Check Electrolyte Level

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1. Remove the cell plug using a suitable tool.
2. Add distilled water up to the MAX level.

SULPHATION

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1. A battery will be completely discharged if it is left unattended for a long time and the specific gravity will become less than 1.100. This may result in sulphation on the cell plates.
2. To determine if a battery has been "sulphated", note its voltage and current when charging it. As shown in the figure, less current and higher voltage are observed in the initial stage of charging sulphated batteries.
3. A sulphated battery may sometimes be brought back into service by means of a long, slow charge, 12 hours or more, followed by a battery capacity test.

Specific Gravity Check

Note. Check the charge condition of the battery.

Periodically check the specific gravity of the electrolyte. Keep a close check on charge condition to prevent over-discharge.

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1. Read hydrometer and thermometer indications at eye level.
2. Use the chart below to correct your hydrometer reading according to electrolyte temperature. HYDROMETER TEMPERATURE CORRECTION Battery electrolyte temperature [°C (°F)] Add to specific gravity reading 71 (160) 0.032 66 (150) 0.028 60 (140) 0.024 54 (130) 0.020 49 (120) 0.016 43 (110) 0.012 38 (100) 0.008 32 (90) 0.004 27 (80) 0 21 (70) -0.004 16 (60) -0.008 10 (50) -0.012 4 (40) -0.016 -1 (30) -0.020 -7 (20) -0.024 -12 (10) -0.028 -18 (0) -0.032 Corrected specific gravity Approximate charge condition 1.260 - 1.280 Fully charged 1.230 - 1.250 3/4 charged 1.200 - 1.220 1/2 charged 1.170 - 1.190 1/4 charged 1.140 - 1.160 Almost discharged 1.110 - 1.130 Completely discharged Charging The Battery CAUTION: Never "quick charge" a fully discharged battery. Keep the battery away from open flame while it is being charged. When connecting the charger, connect the leads first, then turn on the charger. Never turn on the charger first, as this may cause a spark. If battery electrolyte temperature rises above 55 °C (131 °F), stop charging. Always charge battery at a temperature below 55 °C (131 °F). CHARGING RATES (STANDARD CHARGE) Approximate charge condition Charge current (A) Charge time (h) Fully charged 5 2 3/4 charged 2.5 1/2 charged 5 1/4 charged 7.5 Almost discharged 9 Completely discharged 10 CHARGING RATES (QUICK CHARGE) Approximate charge condition Charge current (A) Charge time (h) Fully charged - - 3/4 charged 13 0.5 1/2 charged 26 1/4 charged Almost discharged Completely discharged - - NOTE: The ammeter reading on your battery charger will automatically decrease as the battery charges. This indicates that the voltage of the battery is increasing normally as the state of charge improves. The charging amps indicated above refer to initial charge rate. If, after charging, the specific gravity of any two cells varies more than 0.050, the battery should be replaced.

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1. If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2. Use fuse of specified rating. Never use fuse of more than specified rating.
3. Do not partially install fuse; always insert it into fuse holder properly.
4. Remove fuse for "ELECTRICAL PARTS (BAT)" if vehicle is not used for a long period of time.

EXTENDED STORAGE SWITCH (IF EQUIPPED)

The following switch may be mounted on the fuse block (Junction Box) for transportation and storage.

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1. Remove the extended storage switch when replacing the fuse of extended storage switch.
2. Remove the extended storage switch if it causes the interference when the fuse or the other fuses is checked.

How To Extended Storage Switch ON/OFF

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1. Type A To turn the extended storage switch OFF, pull it up in (A) direction as shown in the figure. To turn the extended storage switch ON, press it in (B) direction as shown in the figure.
2. Type B To turn the extended storage switch OFF, hold (A) of the switch and pull up in (B) direction as shown in the figure. To turn the extended storage switch ON, press it in (C) direction as shown in the figure.

How To Check

A melted fusible link can be detected either by visual inspection or by feeling with finger tip. If its condition is questionable, use circuit tester or test lamp.

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