The controller calculates the coolant temperature from the voltage drop across the coolant temperature sensor. On a cold engine, the voltage drop is high, and on a warm engine, it is low. The coolant temperature affects most of the characteristics controlled by the controller.
For replacement on a DTOZH car (coolant temperature sensor) you need a key «at 19».
1. Disconnect the wire from the terminal «minus» battery.
2. Partially drain the coolant from the radiator.
3. For ease of operation, remove the air filter (see «Removal and installation of the air filter»).
4. Squeezing the plastic clip, disconnect the wiring harness connector from the coolant temperature sensor...
5.... and unscrew the coolant temperature sensor from the thermostat housing.
6. Measure the resistance with an ohmmeter at different temperatures (see table. 9.5). 7. Install on the car DTOZH (coolant temperature sensor) in reverse order of removal.
Table 9.5. DTOZH resistance dependence (coolant temperature sensor) temperature
Temperature,°C | Resistance, Ohm |
-40 -20 -10 0 +5 +10 +15 +20 +25 +35 +45 +60 +80 +100 | 100 700 28 680 16 180 9420 7280 5670 4450 3520 2796 1802 1188 667 332 177 |