Subj: NSX Trivia
Date: 2/11/00

David:
Here is "TECH" trivia for your web site. I will not be responsible if a car blows up when trying the climate control check. ;-) Take care and hope to see you in the Spring, Larry G.

1. What conditions must be met before the valve timing will change? (before the VTEC starts VTECing :-)
a. Engine RPM: 5,800-6,000 rpm
b. Vehicle speed: 3 mph or faster
c. Water temp: 140 degrees or higher

2. When the above conditions are met, how is the valve timing changed?
a. The electronic control unit (ECU) sends a signal to the solenoid valve that opens and allows oil pressure to move hydraulic pistons in each valve set. This locks the primary, secondary, and mid rocker arms together (which normally move separately) so that the mid rocker, which is in contact with the higher lift center cam lobe, drives both rocker arms.

3. When changing your coolant, how many drain bolts must be opened?
5 drains
a. One on the radiator
b. Two on the water pipes (mid way on chassis)
c. Two on the engine

4. How many fans are on the NSX?
6 fans
a. One on the Radiator
b. One on each A/C condenser (total of two)
c. One blower in the ventilation system
d. One to move air past the in-car temperature sensor
e. One fan in the engine compartment
f. Does not include a passenger that talks too much :-)

5. As the NSX coolant temperature starts to overheat, how do the cooling fans sequence?
a. When the radiator coolant temp is above 183* F, the radiator fan operates on low.
b. When the radiator coolant temp is above 194* F, the radiator fan operates on high and the engine compartment fan comes on.
c. When the radiator coolant temp is above 266* F, the condenser fan stops and the A/C compressor stops.

6. How many temperature sensors are in the climate control system?
5 sensors
a. One evaporator sensor
b. One coolant temp sensor
c. One ambient temp sensor (located on front bumper)
d. One sunlight sensor (located on dash by windshield)
e. One in-car temp sensor (located by shifter)

7. The automatic climate control system has a built-in self-diagnosis feature that checks 9 circuits. How do you run it?
a. Turn the ignition switch "ON" and turn the "FAN" switch to "AUTO" position. Wait for at least one minute on each temp display (64*F), (90*F), Then push both the "AUTO" and "OFF" buttons on the control panel at the same time. Any problems in circuits 1-9 will be indicated by the respective indicator (i.e., the little arrows, defrost symbol, etc.) coming on. Turn the ignition switch "OFF" when through.
Want to do the super wiz-bang check? This check will quickly and automatically select and operate all functions of the climate control system.
b. Turn the "FAN" switch to "AUTO", then push in both the 'MODE" and "AUTO" buttons and hold them in while you start the engine. The control unit will then automatically run the check in eight steps, one every 5 seconds. To stop at one of these steps, push the "MODE" button; to continue, push it again for each step after that. Pushing the "OFF" button or turning the ignition "OFF" will turn off the check.