20 Most Recent
1999 Nissan Frontier Questions & Answers
Where is the temp air ambient located on a 1999 Nissan frontier?
HVAC , air temp CAB
or engine air temp IAC?
say HVAC< if climate control options in heater or / AC fails.
tell the problem first so we now where your looking, thanks
why do you think you have one, at all (yes on newer models)
not told they why? scan tool scans shows i fails? How?
right side behind glove box right LHD car. USA
heater box seen.
best I can tell the photo above is 2005
and 1999 had no such thing, no climate controls then.
so post a real problem and we tell you tests to learn the TRUTH
of what is wrong, called DIAGNOSIS
is cold air AC failng
is heater failing or blower speeds dead.
or modes fail, (heat/cold/blend, recirc)
what;'s up doc?
are you cooling or heating the cab, or just defrosting?
I BOUGHT A JAPAN COMMERSIAL TRUCK MODEL CD45 WITH
The ECU is usually the last thing a mechanic would suspect for a problem, after eliminating other possibilities. And you should concentrate on what happened to the fuel pressure-why did the fuel pump stop working. So you need to check and test the fuel pump circuit.
Look for the fuel pump fuse first of all and check that it is good. Here is how most fuel pump circuits work: The fuse supplies power to the fuel pump relay (under the hood), and when the relay is activated (or energized) by the ecu signal that goes to the coil side of the relay, then the fused power passes on through the relay and to the fuel pump in the gas tank.
If you have no fuel pressure, the pump has quit working. So to test the circuit, you would use a test light or volt meter at the fuel tank electrical connector. Find the wire for the fuel pump and see if it has power on it when the engine is cranking over. If it does have power, then you need to pull the pump off and replace it. If there is no power to the pump when cranking the engine, the pump circuit must be the problem. Better find a wiring diagram, you will need it to diagnose further.
1999 nissan frontier
some high pitch whistles can be from the brushes of the alternator needing attention
it may be from failing idler pulley bearings
check for vacuum leaks at hose connections
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