Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - STEERING COLUMN
HEATED STEERING WHEEL SYSTEM - FAIL-SAFE CHART
| MALFUNCTION DETECTION |
Operation when malfunction is detected
| Content | Operation |
| When thermistor trouble is detected | Heater off |
| When overheating (175°C (347°F)) of controller is detected | Heater off |
| When load short current (50 A or more) is detected | Heater off |
| When undervoltage (4.5 V) is detected | Heater off |
| OFF timer (30 min.) | After preset time of timer passes, heater off |
| Reverse voltage protection | Protection circuit operates |
Malfunction detection conditions
When an open or short in the steering wheel thermistor continues for 2 seconds or more.
When the steering heater switch momentary switch is pressed continuously for 10 seconds or more.
Malfunction display
The LED of the steering heater switch blinks at 0.3 second intervals.
Restore condition
If the normal condition is restored for 2 seconds or more, the previous operation before the malfunction occurred continues. However, regardless of if a malfunction is detected and the malfunction operation is occurring, and regardless of if the normal condition is restored and the system is operating normally, the timer will turn off the heater 30 minutes after the switch was first turned on.