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 seat belt, helps to reduce the risk or severity of injury to the driver and front passenger in a frontal collision. The Supplemental Restraint System consists of air bag modules (located in the center of the steering wheel and in the instrument panel on the passenger side), seat belt pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness, and spiral cable.
The vehicle (except Crew Cab model) is equipped with a passenger air bag deactivation switch. Because no rear seat exists where a rear-facing child restraint can be placed, the switch is designed to turn off the passenger air bag so that a rear-facing child restraint can be used in the front passenger seat. The switch is located in the center of the instrument panel, near the ashtray. When the switch is turned to the ON position, the passenger air bag is enabled and could inflate in a frontal collision. When the switch is turned to the OFF position, the passenger air bag is disabled and will not inflate in a frontal collision. A passenger air bag OFF indicator on the instrument panel lights up when the passenger air bag is switched OFF. The driver air bag always remains enabled and is not affected by the passenger air bag deactivation switch.
Information necessary to service the system safely is included in the AIR BAG RESTRAINT SYSTEMS article.
| 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 should be performed by an authorized NISSAN 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 AIR BAG RESTRAINT SYSTEMS article. Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this article. SRS wiring harnesses can be identified by yellow harness connectors. The vehicle (except Crew Cab model) is equipped with a passenger air bag deactivation switch which can be operated by the customer. When the passenger air bag is switched OFF, the passenger air bag is disabled and will not inflate in a frontal collision. When the passenger air bag is switched ON, the passenger air bag is enabled and could inflate in a frontal collision. After SRS maintenance or repair, make sure the passenger air bag deactivation switch is in the same position (ON or OFF) as when the vehicle arrived for service. |
Scheme 18
Scheme 19
- Use a scraper to remove all traces of old liquid gasket from mating surfaces and grooves. Also, completely clean any oil from these areas.
- Apply a continuous bead of liquid gasket to mating surfaces. (Use Genuine Silicone RTV or equivalent. Refer to "RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS ".) For oil pan, be sure liquid gasket diameter is 3.5 to 4.5 mm (0.138 to 0.177 in). For areas except oil pan, be sure liquid gasket diameter is 2.0 to 3.0 mm (0.079 to 0.118 in).
- Apply liquid gasket around the inner side of bolt holes (unless otherwise specified).
- Assembly should be done within 5 minutes after coating.
- Wait at least 30 minutes before refilling engine oil and engine coolant.
SPECIAL SERVICE TOOLS
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Scheme 20
Scheme 21
System Check
| WARNING | Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure coolant escaping from the radiator. Wrap a thick cloth around the radiator cap. Slowly turn it a quarter turn to allow built-up pressure to escape. Carefully remove the radiator cap by turning it all the way. |
CHECKING COOLING SYSTEM HOSES
Check hoses for the following
- Improper attachment
- Leaks
- Cracks
- Damage
- Chafing
- Deterioration
CHECKING RADIATOR
Check radiator for mud or clogging. If necessary, clean radiator as follows.
- Be careful not to bend or damage the radiator fins.
- When radiator is cleaned without removal, remove all surrounding parts such as cooling fan, radiator shroud and horns.
- Tape the harness connectors to prevent water from entering.
- Apply water by hose to the back side of the radiator core vertically downward.
- Apply water again to all radiator core surfaces once per minute.
- Stop washing when water flows clear coming out of the radiator.
- Blow air into the back side of radiator core vertically downward. Use compressed air lower than 490 kPa (5 kg/cm 2 , 71 psi) and keep the air hose end more than 30 cm (11.8 in) away from the core.
- Blow air again into all the radiator core surfaces once per minute until no water blows out and the core is dry.
CHECKING COOLING SYSTEM FOR LEAKS
To check for leakage, apply pressure to the cooling system with a radiator cap tester.
- Testing pressure: 157 kPa (1.6 kg/cm 2 , 23 psi)
| CAUTION | Higher pressure than specified may cause radiator damage. |
Scheme 22
CHECKING RADIATOR CAP
To check radiator cap, apply pressure to radiator cap with a radiator cap tester.
- Radiator cap relief pressure: Standard 78 - 98 kPa (0.8 - 1.0 kg/cm 2 , 11 - 14 psi) Limit 59 - 98 kPa (0.6 - 1.0 kg/cm 2 , 9 - 14 psi)
Scheme 23
Pull the negative pressure valve to open it. Check that it closes completely when released.
Scheme 24
THERMOSTAT
| Valve opening temperature | 76.5°C (170°F) |
|---|---|
| Valve lift | More than 8 mm/90°C (0.31 in/194°F) |
Service Data and Specifications (Thermostat)
RADIATOR
| Unit: kPa (kg/cm 2 , psi) | ||
|---|---|---|
| Cap relief pressure | Standard | 78 -- 98 (0.8 -- 1.0, 11 -- 14) |
| Limit | 59 -- 98 (0.6 -- 1.0, 9 -- 14) | |
| Leakage test pressure | 157 (1.6, 23) | |
Service Data and Specifications (Radiator)