Check the throttle position sensor (TPS)
a 2002 Alero could have several problems causing the overheating. Thermostat, water pump, or clogged radiator issues are the most common causes of overheating.
I've just started having this problem too on my 2002 Malibu. I have found a lot of intermitted turn signal issues, especially for the 2000-01 Malibu, but I am still searching for info on the clicking (turn signal) sound from the dash.
If both odometer and speedometer are not working I would blame the vehicle speed sensor. If just the odometer isn't working the gauge cluster assembly needs to be replaced with a reconditioned one.
I suspect multiple problems. The blank or intermittent odometer problem is a common problem in the 2002 Ford Explorer. The ABS and airbag lights are most likely a different problem than the odometer problem. For complete information on the intermittent odometer problem, see http://www.odometer-repair.com .
He does live in western Australia (Perth) though seems to be traveling a lot which one would imagine is normal for somebody in his profession as a Concert Artist. He seems to have signed a three year contract to be the sole Yamaha Artist in Oz though he was previously a Bosendorfer Artist and was Artist of the year in 2002. see - http://www.yamahamusic.com.au/artists/mark_gasser.asp http://en.wikipedia.org/wiki/Mark_gasser
The 2002 Toyota Highlander has 16 valves.
Does the 2002 Toyota Highlander have LATCH connectors?
The 2002 Toyota Highlander is a gas-powered vehicle.
The 2002 Toyota Highlander has an inline 4 engine.
The 2002 Toyota Highlander has a 4-speed automatic.
The 2002 Toyota Highlander has a 21 degrees angle of departure.
The maximum payload of the 2002 Toyota Highlander is 1500 lbs..
The height of the 2002 Toyota Highlander is 5 ft. 6.1 in. (66.1 in.).
The 2002 Toyota Highlander has double overhead cam (DOHC).
The 2002 Toyota Highlander has a 27 degrees angle of approach.
The 2002 Toyota Highlander runs on regular unleaded.
The 2002 Toyota Highlander is 15 ft. 4.4 in. (184.4 in.) long.