On a recent camping trip to the Sierra Nevada mountains, a 1996 Toyota Land Cruiser’s engine coolant temperature (ETC) was monitored using an OBD2 scanner. Ambient temperatures ranged from the mid to high 90s Fahrenheit. The vehicle was heavily loaded with camping gear, including a rooftop tent, kayak, bikes, and a full fridge, estimated to weigh around 7200 lbs.
During highway cruising at 70 mph, the ETC remained consistently around 194°F. However, while ascending mountain passes, the temperature gradually climbed to 210-212°F, peaking briefly at 214°F. Upon reaching the summit and ceasing the climb, the ETC quickly returned to the upper 190s.
This temperature fluctuation is considered normal for a vehicle under heavy load and navigating steep inclines in high ambient temperatures. The Land Cruiser, despite having an original cooling system, performed flawlessly. The previous owner meticulously maintained the vehicle with regular coolant flushes, documented in comprehensive service records. A complete cooling system overhaul, including new hoses, thermostat, water pump, and radiator, is planned for the upcoming winter. This upgrade may further improve temperature management during future Sierra trips. Observing ETC via OBD2 provides valuable insights into vehicle performance and potential overheating issues, ensuring a safe and enjoyable journey.
