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 un-belted.
Information necessary to service the system safely is included in the " SRS AIRBAG and SEAT BELTS " articles.
| WARNING | To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer. Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see the SRS AIRBAG . Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Information. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors. |
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
| WARNING | When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing serious injury. When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the battery, and wait at least 3 minutes before performing any service. |
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- After removing nuts and bolts, separate the mating surface using Tool and remove old liquid gasket sealing. Tool number : KV10111100 (J-37228) CAUTION: Be careful not to damage the mating surfaces.
- Tap (1) Tool to insert it, and then slide it (2) by tapping on the side as shown in the figure.
- In areas where Tool is difficult to use, use plastic hammer to lightly tap the parts, to remove it. CAUTION: If for some unavoidable reason tool such as screwdriver is used, be careful not to damage the mating surfaces.
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- Remove old liquid gasket adhering to the liquid gasket application surface and the mating surface using scraper. Remove liquid gasket completely from the groove of the liquid gasket application surface, bolts, and bolt holes.
- Thoroughly clean the mating surfaces and remove adhering moisture, grease and foreign materials.
- Attach liquid gasket tube to Tool. Tool number : WS39930000 (-) Use Genuine RTV Silicone Sealant or equivalent. Refer to " «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-388039-S31807235822011022800000) ".
- Apply liquid gasket without breaks to the specified location with the specified dimensions. If there is a groove for the liquid gasket application, apply liquid gasket to the groove. As for the bolt holes, normally apply liquid gasket inside the holes. Occasionally, it should be applied outside the holes. Make sure to read the text of Service Information. Within five minutes of liquid gasket application, install the mating component. If liquid gasket protrudes, wipe it off immediately. Do not retighten nuts or bolts after the installation. After 30 minutes or more have passed from the installation, fill engine oil and engine coolant. CAUTION: Carefully follow all of the warnings, cautions, notes, and procedures contained in this article.
Special Service Tool
The actual shapes of Kent-Moore tools may from those of special service tools illustrated here.
SPECIAL SERVICE TOOLS DESCRIPTION CHART Tool number (Kent-Moore No.) Tool name Description WS39930000 (-) Tube pressure Pressing the tube of liquid gasket EG17650301 (J-33984-A) Radiator cap tester adapter Adapting radiator cap tester to radiator cap and radiator filler neck 28 (1.10) dia. 31.4 (1.236) dia. 41.3 (1.626) dia. Unit: mm (in) KV10111100 (J-37228) Seal cutter Removing chain tensioner cover and water pump cover KV991J0070 (J-45695) Coolant refill tool Refilling engine cooling system KV991J0010 (J-23688) Engine coolant refractometer Checking concentration of ethylene glycol in engine coolant
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Commercial Service Tool
COMMERCIAL SERVICE TOOLS DESCRIPTION CHART Tool name Description Power tool Loosening bolts and nuts
CHECKING COOLING SYSTEM HOSES
Check hoses for the following
- Improper attachment
- Leaks
- Cracks
- Damage
- Loose connections
- Chafing
- Deterioration
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- Check if the reservoir tank coolant level is within MIN to MAX range when the engine is cool.
- Adjust coolant level if it is too much or too little.
CHECKING COOLING SYSTEM FOR LEAKS
To check for leaks, apply pressure to the cooling system using Tool.
Tool number : EG17650301 (J-33984-A)
Testing pressure : 157 kPa (1.6 kg/cm 2 , 23 psi)
| WARNING | Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure coolant escaping from the radiator. |
| CAUTION | Higher pressure than specified may cause radiator damage. |
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- Inspect the radiator cap. Replace the cap if the metal plunger cannot be seen around the edge of the black rubber gasket. Replace the cap if deposits of waxy residue or other foreign material are on the black rubber gasket or the metal retainer. NOTE: Thoroughly wipe out the radiator filler neck to remove any waxy residue or foreign material.
- Pull the negative-pressure valve to open it and check that it closes completely when released. Standard stroke: 0.7 mm - 1.7 mm (0.03 - 0.07 in) Check that there is no dirt or damage on the valve seat of the radiator cap negative-pressure valve. Check that there are no abnormalities in the opening and closing conditions of the negative-pressure valve.
- Check radiator cap relief pressure using Tool. Tool number : EG17650301 (J-33984-A) Standard: 122.3 - 151.7 kPa (1.3 - 1.5 kg/cm 2 , 17.7 - 22 psi) When connecting the radiator cap to the tester, apply water or coolant to the cap seal surface. Replace the radiator cap if there is an abnormality in the negative-pressure valve, or if the open-valve pressure is outside of the standard values.
CHECKING RADIATOR
Check radiator for sludge or clogging. If necessary, clean radiator as follows
- Be careful not to bend or damage the radiator fins.
- When radiator is cleaned without removing, remove all surrounding parts such as cooling fan shroud and horns. Then tape the harness and electrical connectors to prevent water from entering.
- Apply water by hose to the back side of the radiator core, with the hose pointed vertically downward.
- Apply water again to all radiator core surfaces once per minute.
- Stop washing if dirt no longer rinses out from the radiator.
- Blow air into the back side of radiator core, with the air hose pointed vertically downward. Use compressed air lower than 490 kPa (5 kg/cm 2 , 71 psi) and keep distance more than 30 cm (11.8 in).
- Blow air again into all the radiator core surfaces once per minute until no water sprays out.
- Check for leaks.
Changing Engine Coolant
| WARNING | To avoid being scalded, never change the coolant when the engine is hot. Wrap a thick cloth around cap and carefully remove the cap. First, turn the cap a quarter of a turn to release built-up pressure. Then turn the cap all the way. |
Thermostat
| Valve opening temperature | 82°C (180°F) |
|---|---|
| Full-open lift amount | 8.6 mm / 95°C (0.339 in / 203°F) |
| Valve closing temperature | 77°C (171°F) |
THERMOSTAT SPECIFICATION CHART
Radiator
| Unit: kPa (kg/cm 2 , psi) | ||
|---|---|---|
| Cap relief pressure | Standard | 122.3 - 151.7 (1.3 - 1.5, 17.7 - 22) |
| Leakage test pressure | 157 (1.6, 23) | |
RADIATOR SPECIFICATION CHART